Northwestern Mutual Series Fund, Inc.

REGISTRATION NOs. 2-89971
811-3990

UNITED STATES OF AMERICA
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	/ X /
Pre-Effective Amendment No.	/ /
Post-Effective Amendment No. 93	/ X /
and/or
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	/ X /
Amendment No. 94	/ X /

NORTHWESTERN MUTUAL SERIES FUND, INC.
(EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)
720 EAST WISCONSIN AVENUE
MILWAUKEE, WISCONSIN 53202
(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)
(414) 271-1444

(REGISTRANT'S TELEPHONE NUMBER)

DAVID KENNEDY, SECRETARY
720 EAST WISCONSIN AVENUE
MILWAUKEE, WISCONSIN 53202

(NAME AND ADDRESS OF AGENT FOR SERVICE)

IT IS PROPOSED THAT THIS FILING WILL BECOME EFFECTIVE (CHECK APPROPRIATE BOX)

[ ]	IMMEDIATELY UPON FILING PURSUANT TO PARAGRAPH (b)
[X]	ON May 1, 2025 PURSUANT TO PARAGRAPH (b)(1)
[ ]	60 DAYS AFTER FILING PURSUANT TO PARAGRAPH (a)(1)
[ ]	On (DATE) PURSUANT TO PARAGRAPH (a)(1)
[ ]	75 DAYS AFTER FILING PURSUANT TO PARAGRAPH (a)(2)
[ ]	ON (DATE) PURSUANT TO PARAGRAPH (a)(2) OF RULE 485
[ ]	THIS POST-EFFECTIVE AMENDMENT DESIGNATES A NEW EFFECTIVE DATE FOR A PREVIOUSLY FILED POST-EFFECTIVE AMENDMENT.

NORTHWESTERN MUTUAL SERIES FUND, INC.

PROSPECTUS

May 1, 2025

EQUITY PORTFOLIOS	INTERNATIONAL PORTFOLIOS
GROWTH STOCK PORTFOLIO	INTERNATIONAL GROWTH PORTFOLIO
FOCUSED APPRECIATION PORTFOLIO	RESEARCH INTERNATIONAL CORE PORTFOLIO
LARGE CAP CORE STOCK PORTFOLIO	INTERNATIONAL EQUITY PORTFOLIO
LARGE CAP BLEND PORTFOLIO	EMERGING MARKETS EQUITY PORTFOLIO
INDEX 500 STOCK PORTFOLIO
LARGE COMPANY VALUE PORTFOLIO	FIXED INCOME PORTFOLIOS
DOMESTIC EQUITY PORTFOLIO	GOVERNMENT MONEY MARKET PORTFOLIO
EQUITY INCOME PORTFOLIO	SHORT-TERM BOND PORTFOLIO
	SELECT BOND PORTFOLIO
MID CAP GROWTH STOCK PORTFOLIO	LONG-TERM U.S. GOVERNMENT BOND PORTFOLIO
INDEX 400 STOCK PORTFOLIO MID CAP VALUE PORTFOLIO	INFLATION MANAGED PORTFOLIO (formerly Inflation Protection Portfolio)
	HIGH YIELD BOND PORTFOLIO
SMALL CAP GROWTH STOCK PORTFOLIO	MULTI-SECTOR BOND PORTFOLIO
INDEX 600 STOCK PORTFOLIO
SMALL CAP VALUE PORTFOLIO	ACTIVE/PASSIVE ALLOCATION PORTFOLIOS
	ACTIVE/PASSIVE BALANCED PORTFOLIO (formerly Balanced Portfolio)
	ACTIVE/PASSIVE MODERATE PORTFOLIO (formerly Asset Allocation Portfolio)

The Securities and Exchange Commission has not approved or disapproved these securities or passed upon the adequacy of this prospectus. Any representation to the contrary is a criminal offense.

Table of Contents

	Page
PORTFOLIO SUMMARIES	1
Growth Stock Portfolio	1
Focused Appreciation Portfolio	5
Large Cap Core Stock Portfolio	9
Large Cap Blend Portfolio	13
Index 500 Stock Portfolio	17
Large Company Value Portfolio	20
Domestic Equity Portfolio	24
Equity Income Portfolio	27
Mid Cap Growth Stock Portfolio	31
Index 400 Stock Portfolio	34
Mid Cap Value Portfolio	37
Small Cap Growth Stock Portfolio	41
Index 600 Stock Portfolio	45
Small Cap Value Portfolio	48
International Growth Portfolio	52
Research International Core Portfolio	56
International Equity Portfolio	60
Emerging Markets Equity Portfolio	64
Government Money Market Portfolio	68
Short-Term Bond Portfolio	71
Select Bond Portfolio	75
Long-Term U.S. Government Bond Portfolio	78
Inflation Managed Portfolio (formerly Inflation Protection Portfolio)	83
High Yield Bond Portfolio	87
Multi-Sector Bond Portfolio	90
Active/Passive Balanced Portfolio (formerly Balanced Portfolio)	96
Active/Passive Moderate Portfolio (formerly Asset Allocation Portfolio)	102
SUMMARY OF IMPORTANT INFORMATION REGARDING THE PORTFOLIOS	108
INTRODUCTION	108
MORE ABOUT INVESTMENT STRATEGIES AND RISKS	109
General Information	109
More About Principal Investment Strategies and Risks	112
Non-Principal Investment Strategies and Risks	134
Other Risks	135
THE INVESTMENT ADVISER AND SUB-ADVISERS	135
The Investment Adviser	135
The Sub-Advisers	136
Portfolio Managers	137
Advisory Fees	142
Manager of Managers Structure	145
Legal Proceedings	145
ABOUT YOUR INVESTMENT	146
How Shares Are Priced	146
Securities for which Market Quotations are Readily Available	146
Fair Value Pricing	146
Taxes And Dividends	147

i Northwestern Mutual Series Fund, Inc. Prospectus

	Page
INVESTING IN THE PORTFOLIOS	147
Buying and Selling Shares	147
Short Term and Excessive Trading	148
Mixed Funding	149
DISCLOSURE OF PORTFOLIO HOLDINGS	149
FINANCIAL HIGHLIGHTS	151
APPENDIX A – DESCRIPTIONS OF BENCHMARKS AND OTHER INDICES	155

Northwestern Mutual Series Fund, Inc. Prospectus ii

Growth Stock Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is long-term growth of capital. Current income is a secondary objective.

FEES AND EXPENSES OF THE PORTFOLIO

The table below describes the fees and expenses that you may pay when you buy, hold, and sell interests in a separate account that invests in shares of the Portfolio as a result of your purchase of a variable annuity contract or variable life insurance policy. The fees and expenses shown in the table and Example do not reflect fees and expenses separately charged by variable annuity contracts or variable life insurance policies. If the fees and expenses separately charged by variable annuity contracts and variable life insurance policies were included, the fees and expenses shown in the table and the Example would be higher.

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.41%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.01%
Total Annual Portfolio Operating Expenses	0.42%
Fee Waiver(1)	0.00%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.42%

(1)

The Portfolio's investment adviser has contractually agreed to waive a portion of its management fee. This contractual agreement will continue through at least April 30, 2026 and may not be terminated prior to that date without action by the Board of Directors.

Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. The Example reflects adjustments made to the Portfolio’s operating expenses due to the fee waiver agreement with the investment adviser for the first year only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

1 Year	3 Years	5 Years	10 Years
$43	$135	$235	$530

Portfolio Turnover

The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs. These costs, which are not reflected in Annual Portfolio Operating Expenses or in the Example, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 6.86% of the average value of its portfolio.

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in stocks of growth companies. Growth companies, as defined by the adviser, are those included in a third-party growth index. For this purpose, a third-party growth index is an index developed, calculated, and maintained by a third-party that measures the performance of growth stocks. For the avoidance of doubt, the Portfolio does not intend to track an index.

The adviser generally selects “blue chip” growth companies, which are, in the adviser's view, well established in their industries and have the potential for above-average earnings growth, for inclusion in the Portfolio. The investment approach reflects the adviser’s belief that solid company fundamentals (with an emphasis on the potential for strong growth in earnings per share or operating cash flow) combined with a positive outlook for a company’s industry will ultimately reward investors with strong investment performance. The Portfolio normally invests in stocks of large and mid-capitalization companies. While the Portfolio does not seek to focus its investments in any particular sector, the Portfolio may at times have a relatively high percentage of its assets invested in a particular sector as a result of the adviser’s stock selection process. Further, the Portfolio may hold and maintain large positions in a single or small number of securities as a result of the adviser’s investment strategy. The adviser integrates environmental, social, and governance (ESG) factors into its investment research process for certain investments. While ESG matters vary widely, the adviser generally considers ESG factors such as climate change, resource depletion, labor standards, diversity, human rights issues, and governance structure and practices. For certain types of investments, including, but not limited to, cash, currency positions, and particular types of derivatives, an ESG analysis may not be relevant or possible due to lack of data. Where ESG considerations are integrated into the investment research process, the adviser focuses on the ESG factors that it considers most likely to have a material impact on the performance of the holdings in the Portfolio. The adviser may conclude that other attributes of an investment outweigh ESG considerations when making investment decisions for the Portfolio.

1 Northwestern Mutual Series Fund, Inc. Prospectus

Growth Stock Portfolio – Summary

In pursuing its investment objective, the Portfolio has the discretion to deviate from its normal investment criteria. These situations might arise when the adviser believes a security could increase in value for a variety of reasons, including an extraordinary corporate event, a new product introduction or innovation, a favorable competitive development, or a change in management.

The Portfolio invests primarily in common stocks. In keeping with the Portfolio’s investment objective, it may also invest up to 20% of net assets in foreign based companies listed on foreign exchanges, either directly or through American Depositary Receipts (ADRs).

The Portfolio may sell a security for a variety of reasons, such as a significant adverse change in the company’s business fundamentals, to secure gains or limit losses, or to redeploy assets into more promising opportunities.

PRINCIPAL RISKS

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

•

ADR Risk – ADRs are receipts representing ownership of shares of a foreign issuer held by a U.S. bank or similar financial institution that entitle the holder to dividends and capital gains on the underlying foreign shares. ADRs are alternatives to directly purchasing the underlying foreign securities in their national markets and currencies. They are subject to many of the risks associated with direct investments in foreign securities, such as currency risk, political and economic risk and market risk, because their values depend on the performance of the non-dollar denominated underlying foreign securities. The Portfolio is also subject to fees and the credit risk of the financial institution holding the ADRs. ADRs may be “sponsored,” meaning that they are implemented by a financial institution in collaboration with the issuing foreign company, or “unsponsored,” meaning that the financial institution created the instrument without the sponsorship or direct involvement of the foreign company. Differing registration requirements apply to each type of ADR. ADRs may transact on exchanges or on over-the-counter markets (“OTC”). Conducting transactions in OTC markets may result in higher costs, a lack of pricing transparency and lower liquidity when compared with exchange-based transactions. Risks associated with different ADR types will vary, based upon differences in registration, reporting and disclosure requirements that apply to such ADRs and the characteristics of the market in which transactions for the particular ADR are conducted.

•

Dividend-Paying Stock Risk – The Portfolio’s emphasis on dividend-paying stocks could cause the Portfolio to underperform similar funds that invest without consideration of a company’s track record of paying dividends. Stocks with a history of paying dividends may not participate in a broad market advance to the same degree as most other stocks. Currently, interest rates remain at historically low levels, and a sharp rise in interest rates or economic downturn could cause a company to unexpectedly reduce or eliminate its dividend.

•

Equity Securities Risk – The value of equity securities, such as common stocks, could decline if the financial condition of the companies the Portfolio is invested in declines or if overall market and economic conditions deteriorate. Equity securities generally have greater price volatility than fixed income securities.

•

ESG Risk – Incorporating the consideration of ESG factors in the investment process may result in the exclusion of certain securities for non-investment reasons and therefore the Portfolio may forego some market opportunities available to funds that do not consider ESG factors. The evaluation of ESG factors may affect the Portfolio’s exposure to certain issuers or industries and may not work as intended. The Portfolio may underperform other funds that do not consider ESG factors or that use different ESG factors to evaluate a security. Information used to evaluate ESG factors may not be readily available, complete, or accurate, and may vary across providers and issuers, as ESG factors are not uniformly defined or assessed. There is no guarantee that evaluating ESG considerations for individual securities will positively contribute to the Portfolio’s performance results.

•

Investment Style Risk – A Portfolio managed using a growth style of investing, such as the Portfolio, may underperform when the market does not favor the particular style used by the Portfolio. Different investment styles tend to shift in and out of favor, depending on market conditions and investor sentiment.

•

Large Cap Company Risk – Investing in large cap stocks could cause the Portfolio to underperform in markets favoring faster growing companies. Large cap stocks tend to be more mature with fewer opportunities to grow and may not have the same growth potential as stocks with smaller capitalizations.

•

Northwestern Mutual Series Fund, Inc. Prospectus 2

Growth Stock Portfolio – Summary

From time to time, such holdings may, on an aggregate basis, constitute a considerable percentage of Portfolio assets. As a result, the Portfolio’s performance could be significantly affected by changes in the value of a single security or small number of securities, and holding such positions may increase the overall volatility of Portfolio performance.

•

Market Risk – The risk that the market price of securities owned by the Portfolio may go up or down, sometimes rapidly or unpredictably. The value of a security may decline due to changes in general market conditions, economic trends or events that are not specifically related to the issuer of the security, or factors that affect a particular issuer or issuers, exchange, country, group of countries, region, market, industry, group of industries, sector or asset class. Global economies and financial markets are increasingly interconnected, which magnifies the potential that conditions in one country or region might adversely impact issuers in, or foreign exchange rates with, a different country or region. Geopolitical and other events, including war, terrorism, economic uncertainty, trade disputes, public health crises (such as epidemics and pandemics), and related events have led, and in the future may lead, to increased market volatility, which may disrupt U.S. and world economies and markets and may have significant adverse direct or indirect effects on the Portfolio and its investments.

•

Mid Cap Company Risk – Investing in mid cap stocks may cause greater risk of loss and price fluctuation than investing in stocks of larger cap companies due to a more limited track record, narrower product markets, more limited resources and less liquid trading markets. These stocks may be more volatile and more difficult to buy and sell than stocks with larger capitalizations.

•

Sector Focus Risk – To the extent the Portfolio invests a relatively high percentage of its assets in a particular sector, it will have greater exposure to the risks associated with that sector, including the risk that the securities of companies within the sector will underperform due to adverse economic conditions, regulatory or legislative changes, or increased competition affecting the sector. To the extent the Portfolio is underweight in other sectors, the Portfolio risks missing out on advances in those sectors.

•

Underlying Portfolio Risk – The Portfolio may serve as an investment option, or “Underlying Portfolio,” for other portfolios of Northwestern Mutual Series Fund, Inc. that are managed as “fund of funds.” As a result, from time to time, the Portfolio may experience relatively large investments or redemptions from those other portfolios and could be required to invest cash or sell securities at a time when it is not advantageous to do so.

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio's investment strategy (Strategy Index). The table also shows the Portfolio's returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Prior to November 14, 2019, the sub-adviser to the Portfolio was different. Performance shown may have been different if the current strategy, and the current sub-adviser, had been in place during the periods shown. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	2nd quarter, 2020	27.90%
Worst Quarter	2nd quarter, 2022	-25.37%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Growth Stock Portfolio	37.82%	14.77%	13.44%
Strategy Index:	Russell 1000® Growth Index (reflects no deduction for fees, expenses or taxes)	33.36%	18.96%	16.78%
Broad-Based Index:	S&P 500® Index1 (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: T. Rowe Price Associates, Inc. (TRPA)
Portfolio Manager: Paul D. Greene II, Vice President and Associate Portfolio Manager of TRPA, joined T. Rowe Price in 2006 and has managed the Portfolio since January 2020.

3 Northwestern Mutual Series Fund, Inc. Prospectus

Growth Stock Portfolio – Summary

TAXES AND INTERMEDIARY COMPENSATION

For important information about taxes, dividends and financial intermediary compensation, please see “SUMMARY OF IMPORTANT INFORMATION REGARDING THE PORTFOLIOS” on page 108 of the Northwestern Mutual Series Fund, Inc. Prospectus.

Northwestern Mutual Series Fund, Inc. Prospectus 4

Focused Appreciation Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is long-term growth of capital.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.72%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.02%
Total Annual Portfolio Operating Expenses	0.74%
Fee Waiver(1)	(0.13)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.61%

(1)

Example

1 Year	3 Years	5 Years	10 Years
$62	$223	$399	$906

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

The Portfolio invests primarily in the equity securities of companies selected for their growth potential. The Portfolio focuses on stocks of large-capitalization companies, but may invest in companies of any size. For this purpose, large-capitalization companies are those with a market capitalization in excess of $5 billion at the time of purchase.

The adviser employs a growth style of equity management that emphasizes companies with sustainable competitive advantages versus others, long-term structural growth drivers that will lead to above-average future cash flow growth, attractive cash flow returns or invested capital, and management teams focused on creating long-term value for shareholders. Long-term structural growth drivers are dynamics that in the manager’s opinion are not likely to change for five years or longer such as the transition of consumer shopping from in-store to online. The adviser aims to invest in companies when they trade at a significant discount to the estimate of their intrinsic value. The intrinsic value of a company is the true worth of its business as perceived by the portfolio managers, which may not be fully reflected in the market price of its stock. The adviser calculates the intrinsic value of a company by the discounted net present value of future cash flows. The Portfolio normally invests across a wide range of sectors and industries. The Portfolio’s sector exposure relative to its benchmark is driven by the adviser’s stock selection process and, as a result, may at times have a relatively high percentage of its assets invested in a particular sector.

The adviser utilizes a “focused” investment strategy resulting in the Portfolio investing primarily in a core group of 30-40 securities. The Portfolio may at times exceed this range. The Portfolio invests primarily in common stocks. The Portfolio may invest up to 20% of its net assets in foreign securities, including American Depositary Receipts (ADRs) and emerging market securities. The Portfolio may also invest in real estate investment trusts (REITs). The Portfolio is classified as “non-diversified” under the Investment Company Act of 1940, as amended, which means it may hold a larger position in a particular company or smaller number of companies than a “diversified” fund.

5 Northwestern Mutual Series Fund, Inc. Prospectus

Focused Appreciation Portfolio – Summary

The Portfolio may sell an investment when the portfolio manager believes an unfavorable structural change occurs within a given business or the markets in which it operates, a critical underlying investment assumption is flawed, when a more attractive reward-to-risk opportunity becomes available, when the current price reflects intrinsic value, or for other investment reasons which the portfolio manager deems appropriate.

PRINCIPAL RISKS

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

•

Foreign Investing Risk – Investing in foreign securities may subject the Portfolio to more rapid and extreme changes in value or more losses than a fund that invests exclusively in U.S. securities. This risk is due to potentially smaller markets, differing reporting, accounting and auditing standards, and nationalization, expropriation or confiscatory taxation, currency blockage, political and economic conditions, or diplomatic developments. Foreign securities may be adversely affected by decreases in foreign currency values relative to the U.S. dollar and may be less liquid, more volatile, and harder to value than U.S. securities. The Portfolio’s investments in emerging markets heighten these risks due to a lack of established legal, political, business and social frameworks to support securities markets.

•

Liquidity Risk – Certain of the Portfolio’s investments, such as small cap stocks and foreign securities, in particular emerging market securities, may be difficult to purchase or sell at an advantageous time or price, if at all. These risks may be magnified during periods of economic turmoil or in an extended economic downturn.

•

Northwestern Mutual Series Fund, Inc. Prospectus 6

Focused Appreciation Portfolio – Summary

group of countries, region, market, industry, group of industries, sector or asset class. Global economies and financial markets are increasingly interconnected, which magnifies the potential that conditions in one country or region might adversely impact issuers in, or foreign exchange rates with, a different country or region. Geopolitical and other events, including war, terrorism, economic uncertainty, trade disputes, public health crises (such as epidemics and pandemics), and related events have led, and in the future may lead, to increased market volatility, which may disrupt U.S. and world economies and markets and may have significant adverse direct or indirect effects on the Portfolio and its investments.

•

Mid and Small Cap Company Risk – Investing in mid and small cap stocks may cause greater risk of loss and price fluctuation than investing in stocks of larger cap companies due to a more limited track record, narrower product markets, more limited resources and less liquid trading markets. These stocks may be more volatile and more difficult to buy and sell than stocks with larger capitalizations.

•

REITs Risk – Investments in REITs are subject to the types of risks associated with investing in the real estate industry, including, among other risks: adverse developments affecting the real estate industry; declines in real property values; changes in interest rates; defaults by mortgagors or other borrowers and tenants; lack of availability of mortgage funds or financing; extended vacancies of properties, especially during economic downturns; casualty or condemnation losses; property taxes and operating losses; and governmental actions, such as changes to tax laws, zoning regulations or environmental regulations. REITs are dependent upon the quality of their management, may have limited financial resources and heavy cash flow dependency, may not be diversified geographically or by property type, and may be subject to self-liquidation.

•

Non-Diversification Risk – The Portfolio is classified as a non-diversified fund and is permitted to invest a greater portion of its assets in a single security or a small number of securities. As a result, an increase or decrease in the value of single security held by the Portfolio may have a greater impact on the Portfolio’s net asset value and total return, and the Portfolio’s performance could be more volatile than the performance of funds that hold a greater number of securities.

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio's investment strategy (Strategy Index). The table also shows the Portfolio's returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	2nd quarter, 2020	24.14%
Worst Quarter	2nd quarter, 2022	-22.74%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Focused Appreciation Portfolio	34.43%	18.22%	16.94%
Strategy Index:	Russell 1000® Growth Index (reflects no deduction for fees, expenses or taxes)	33.36%	18.96%	16.78%
Broad-Based Index:	S&P 500® Index1 (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

7 Northwestern Mutual Series Fund, Inc. Prospectus

Focused Appreciation Portfolio – Summary

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: Loomis, Sayles & Company, L.P. (Loomis Sayles)
Portfolio Manager: Aziz V. Hamzaogullari, CFA, Executive Vice President of Loomis Sayles, joined Loomis Sayles in 2010 and began managing the Portfolio in 2015.

TAXES AND INTERMEDIARY COMPENSATION

Northwestern Mutual Series Fund, Inc. Prospectus 8

Large Cap Core Stock Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is long-term growth of capital and income.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.42%
Distribution and Service (12b-1) Fees	None
Other Expenses(1)	0.02%
Total Annual Portfolio Operating Expenses(1)	0.44%
Fee Waiver(2)	(0.01)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1),(2)	0.43%

(1)

Includes fees and expenses incurred indirectly by the Portfolio as a result of investments in other investment companies (Acquired Fund Fees and Expenses). The operating expenses of the Portfolio reflected in the Portfolio's most recent annual report and Financial Highlights do not include the Acquired Fund Fees and Expenses.

(2)

Example

1 Year	3 Years	5 Years	10 Years
$44	$140	$246	$554

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in stocks of large-capitalization companies. For this purpose, large-capitalization stocks are those whose market capitalizations are above $5 billion at the time of purchase.

In managing the Portfolio, the adviser allocates the Portfolio’s assets across a variety of industries, selecting companies in each industry based on the research of a team of global industry analysts. The Portfolio typically seeks to maintain representation in each major industry represented by broad-based, large cap U.S. equity indices.

In analyzing a prospective investment for the Portfolio, the adviser utilizes a “bottom-up” approach, which is the use of fundamental analysis to identify specific securities for purchase or sale. Fundamental analysis of a company involves the assessment of a variety of factors, including the company’s business environment, management quality, balance sheet, income statement, anticipated earnings, revenues and dividends, and other related measures or indicators of valuation and growth potential. The adviser also integrates the evaluation of financially material environmental, social, and/or governance (ESG) characteristics (where available for a company) into its fundamental analysis. Examples of ESG factors that may be considered include, but are not limited to, employee engagement, talent attraction and retention, incentive structures, and corporate strategy. Consideration of ESG factors may not be determinative in the adviser’s investment process and the adviser may conclude that other attributes of an investment outweigh ESG

9 Northwestern Mutual Series Fund, Inc. Prospectus

Large Cap Core Stock Portfolio – Summary

considerations when making investment decisions for the Portfolio. The Portfolio’s sector exposures generally conform with the sector weights present in the Portfolio’s benchmark index and as a result, in combination with the Portfolio’s reliance on fundamental company analysis, and based upon market or economic conditions, the Portfolio may at times have a relatively high percentage of its assets invested in a particular sector of the market. Further, the Portfolio may hold and maintain large positions in a single or small number of securities as a result of the adviser’s investment strategy.

The Portfolio invests primarily in U.S. common stocks. Up to 20% of the Portfolio’s net assets may be invested in foreign based companies listed on foreign exchanges, either directly or through American Depositary Receipts (ADRs). The Portfolio may also invest in real estate investment trusts (REITs).

The Portfolio may sell a security for a variety of reasons, including a significant adverse change in the company’s business fundamentals, if the company has become significantly overvalued in terms of earnings, assets or growth prospects, or more attractive alternatives exist.

PRINCIPAL RISKS

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

•

Investment Style Risk – A portfolio managed using a particular style of investing, such as growth or value or a combination of both, may underperform when the market does not favor the particular style used by the Portfolio. Different investment styles tend to shift in and out of favor, depending on market conditions and investor sentiment.

•

Large Position Risk – Based upon the implementation of the adviser’s investment strategy, although the Portfolio is considered “diversified” under applicable law, the Portfolio may hold and maintain large positions in a single or small number of securities. From time to time, such holdings may, on an aggregate basis, constitute a considerable percentage of Portfolio assets. As a result, the Portfolio’s performance could be significantly affected by changes in the value of a single security or small number of securities, and holding such positions may increase the overall volatility of Portfolio performance.

Northwestern Mutual Series Fund, Inc. Prospectus 10

Large Cap Core Stock Portfolio – Summary

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio's returns with those of an index that represents the overall securities market (Broad-Based Index). Prior to October 27, 2017, the sub-adviser to the Portfolio was different. Performance shown may have been different if the current strategy, and the current sub-adviser, had been in place during the periods shown. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	2nd quarter, 2020	21.81%
Worst Quarter	1st quarter, 2020	-18.72%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Large Cap Core Stock Portfolio	22.16%	13.86%	11.88%
Broad-Based Index:	S&P 500® Index (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: Wellington Management Company LLP (Wellington Management)
Portfolio Managers: Jonathan G. White, CFA and Director of Research Portfolios, joined Wellington Management in 1999 and has co-managed the Portfolio since October 2017.
Mary L. Pryshlak, CFA and Head of Investment Research, joined Wellington Management in 2004 and has co-managed the Portfolio since May 2018.

11 Northwestern Mutual Series Fund, Inc. Prospectus

Large Cap Core Stock Portfolio – Summary

TAXES AND INTERMEDIARY COMPENSATION

Northwestern Mutual Series Fund, Inc. Prospectus 12

Large Cap Blend Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to seek long-term growth of capital and income.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.76%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.08%
Total Annual Portfolio Operating Expenses	0.84%
Fee Waiver(1),(2)	(0.12)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1),(2)	0.72%

(1)

(2)

Restated to reflect current expenses.

Example

1 Year	3 Years	5 Years	10 Years
$74	$256	$454	$1,026

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in securities of large-capitalization companies. The Portfolio defines large-capitalization companies as those with a market capitalization in excess of $5 billion. The Portfolio invests primarily in securities of U.S. companies. The Portfolio may also invest up to 20% of its net assets in common stocks of foreign issuers, and may hold American Depositary Receipts (ADRs). The Portfolio may also invest in real estate investment trusts (REITs) and mid capitalization companies.

In managing the Portfolio, the adviser employs a three-step process that combines a “blend” of growth-focused research, valuation and stock selection. The adviser takes an in-depth look at company prospects, which is designed to provide insight into a company’s real growth potential (e.g., sales, revenue, or earnings growth that may outpace peer averages or the overall market). The research findings allow the adviser to rank the companies in each sector according to their relative value (i.e., ranking companies from most- to least-undervalued by the market in the adviser’s assessment). Following the growth- and value-based assessments, the adviser seeks to outperform the benchmark through superior stock selection.

As part of its investment process, the adviser seeks to assess the impact of environmental, social and governance (ESG) factors on many issuers in the universe in which the Portfolio invests. The adviser’s assessment is based on an analysis of key opportunities and risks across industries to seek to identify financially material issues with respect to the Portfolio’s investments in securities and ascertain key issues that merit engagement with issuers. These ESG factor assessments may not be conclusive and securities of issuers may be purchased and retained by the Portfolio for reasons other than material ESG factors while the Portfolio may divest or not invest in securities of issuers that may be positively impacted by such factors. Examples of ESG factors which may be considered (which are provided for illustrative purposes only, are not exhaustive and may not be relevant to a particular investment) are climate change risk, human capital management and executive compensation. The adviser’s ESG integration approach does not change the Portfolio’s investment objective, exclude specific types of industries or companies or limit the Portfolio’s investable

13 Northwestern Mutual Series Fund, Inc. Prospectus

Large Cap Blend Portfolio – Summary

universe. The Portfolio is not designed for investors who wish to screen out particular types of companies or investments or are looking for funds that meet specific ESG goals. Further, the Portfolio may hold and maintain large positions in a single or small number of securities as a result of the adviser’s investment strategy. On behalf of the Portfolio, the adviser then buys and sells equity securities, using the research and valuation rankings as a basis. In general, the adviser buys equity securities that are identified as attractively valued and considers selling them when they appear to be overvalued. Along with attractive valuation, the adviser often considers a number of other criteria:

•

catalysts that could trigger a rise in a stock’s price

•

high potential reward compared to potential risk

•

temporary mispricing caused by apparent market overreactions

PRINCIPAL RISKS

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

•

Northwestern Mutual Series Fund, Inc. Prospectus 14

Large Cap Blend Portfolio – Summary

•

Sector Focus Risk – To the extent the Portfolio invests a relatively high percentage of its assets in a particular sector, it will have greater exposure to the risks associated with that sector, including the risk that the securities of companies within the sector will underperform due to adverse economic conditions, regulatory or legislative changes, or increased competition affecting the sector. To the extent the Portfolio underweight in other sectors, the Portfolio risks missing out on advances in those sectors.

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio's returns with those of an index that represents the overall securities market (Broad-Based Index). Prior to July 31, 2023, the Portfolio was managed by a different sub-adviser. Performance shown may have been different if the current strategy, and the current sub-adviser, had been in place during the periods shown. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	4th quarter, 2020	15.58%
Worst Quarter	1st quarter, 2020	-23.32%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Large Cap Blend Portfolio	23.86%	10.92%	10.22%
Broad-Based Index:	S&P 500® Index (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

15 Northwestern Mutual Series Fund, Inc. Prospectus

Large Cap Blend Portfolio – Summary

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: J.P. Morgan Investment Management, Inc. (JP Morgan)
Portfolio Managers: Scott B. Davis, Managing Director, joined JP Morgan in 2006 and has managed the Portfolio since July 2023.
Shilpee Raina, Executive Director, joined JP Morgan in 2005 and has managed the Portfolio since July 2023.

TAXES AND INTERMEDIARY COMPENSATION

Northwestern Mutual Series Fund, Inc. Prospectus 16

Index 500 Stock Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to achieve investment results that approximate the performance of the Standard & Poor’s 500 Composite Stock Price Index (“S&P 500® Index”).

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.20%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.01%
Total Annual Portfolio Operating Expenses	0.21%
Fee Waiver(1)	(0.02)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.19%

(1)

Example

1 Year	3 Years	5 Years	10 Years
$19	$66	$116	$266

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

The Portfolio employs a “passive management,” or indexing, investment approach designed to track the performance of the S&P 500® Index. The S&P 500® Index is composed of the stocks of primarily large capitalization companies that represent a broad spectrum of the U.S. economy and a substantial part of the U.S. stock market’s total capitalization. As of March 31, 2025, the market capitalization range of the S&P 500® Index was approximately $5.30 billion to $3.34 trillion. Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in stocks included in the underlying index. Further, the Portfolio attempts to achieve its objective by investing all, or substantially all, of its assets in the stocks that make up the S&P 500® Index, holding each stock in approximately the same proportion as its weighting in the Index. This is known as a full replication strategy. The Portfolio may also invest in equity index futures and exchange traded funds for cash management and liquidity purposes and to help achieve full replication.

Standard & Poor’s constructs the Index by first identifying major industry categories and then allocating a representative sample of the larger and more liquid stocks in those industries to the index. S&P weights each stock according to its float-adjusted market value. For example, the 50 largest companies in the index may account for over 50% of its value.

Because the Portfolio is managed with a goal of fully replicating the underlying S&P 500® Index, the approach employed by the Portfolio with respect to reconstitution and rebalancing aligns with the process followed generally by the S&P 500® Index. Changes to the underlying company constituents of the S&P 500® Index are made on an as-needed basis and are usually announced several days before they are scheduled to be implemented. The S&P 500® Index typically makes weightings adjustments based on changes in the amount of a constituent company’s shares outstanding on a quarterly basis. The constituent and share-based weightings changes made by the S&P 500® Index will be made in a parallel fashion by the Portfolio on substantially the same timeline. Additionally, the Portfolio utilizes cash equitization instruments, and rebalancing occurs as necessary to maintain balances within established target ranges for these instruments. Cash equitization as employed by the Portfolio is a strategy pursuant to which the

17 Northwestern Mutual Series Fund, Inc. Prospectus

Index 500 Stock Portfolio – Summary

Portfolio will acquire certain derivative instruments, such as equity index futures, whereby the futures will be utilized to replicate index returns and enable the Portfolio to be fully invested, while still maintaining cash balances as needed by the Portfolio. This strategy works to limit the extent to which uninvested cash will weigh negatively on overall Portfolio returns when markets go up.

The Index 500 Stock Portfolio’s ability to match the performance of the S&P 500® Index will be affected to some extent by the size and timing of cash flows into and out of the Index 500 Stock Portfolio. The Portfolio will be managed with a view to reducing such effects.

PRINCIPAL RISKS

•

Equity Securities Risk – The value of equity securities, such as the stocks in which the Portfolio invests, could decline if the financial condition of the companies the Portfolio is invested in declines or if overall market and economic conditions deteriorate. Equity securities generally have greater price volatility than fixed income securities.

•

Indexing Strategy Risk –A Portfolio using a passive management strategy is not “actively” managed, and therefore does not engage in shifting portfolio assets to take advantage of market opportunity, and does not attempt to manage market volatility, use defensive strategies or reduce the effects of any long-term periods of poor stock performance. Since the Portfolio implements a full replication strategy with respect to the index which it tracks, to the extent the index has a significant allocation to an industry or group of industries, a particular sector, or to a single issuer or small number of issuers, the Portfolio will exhibit a significant investment level in that industry, group of industries, sector, issuer or small number of issuers. Portfolio performance may be adversely affected by a significant investment in an industry, group of industries, sector, issuer or small number of issuers, and may be more susceptible to adverse economic, market, political or regulatory developments affecting the industry, group of industries sector or issuer(s) subject to a significant level of investment.

•

Tracking Error Risk – The Portfolio may be subject to tracking error, which is the divergence of the Portfolio’s performance from that of the underlying index. Tracking error may occur due to a number of factors, including differences between the securities held in the Portfolio and those included in the underlying index, and based upon the fact that the Portfolio incurs fees and expenses, while the underlying index does not. Tracking error risk may be heightened during times of increased market volatility or other unusual market conditions.

Northwestern Mutual Series Fund, Inc. Prospectus 18

Index 500 Stock Portfolio – Summary

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio's returns with those of an index that represents the overall securities market (Broad-Based Index). Prior to February 1, 2021, the Portfolio was managed by Mason Street Advisors, LLC. Performance shown may have been different if the current strategy, and the current sub-adviser, had been in place during the periods shown. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	2nd quarter, 2020	20.47%
Worst Quarter	1st quarter, 2020	-19.62%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Index 500 Stock Portfolio	24.75%	14.30%	12.86%
Broad-Based Index:	S&P 500® Index (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: BlackRock Advisors, LLC (BlackRock)
Portfolio Managers: Peter Sietsema, Director, joined BlackRock in 2007 and has managed the Portfolio since May 2022.
Jennifer Hsui, CFA, Managing Director and Co-head and Chief Investment Officer of Global Index Equity, joined BlackRock in 2006 and has managed the Portfolio since February 2021.
Paul Whitehead, Managing Director and Co-Head of Index Equity, joined BlackRock in 1996 and has managed the Portfolio since May 2022.

TAXES AND INTERMEDIARY COMPENSATION

19 Northwestern Mutual Series Fund, Inc. Prospectus

Large Company Value Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to seek long-term capital growth. Income is a secondary objective.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.70%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.10%
Total Annual Portfolio Operating Expenses	0.80%
Fee Waiver(1)	(0.05)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.75%

(1)

Example

1 Year	3 Years	5 Years	10 Years
$77	$250	$439	$985

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in securities of large-capitalization value companies. For purposes of the Portfolio, large-capitalization companies are those companies with market capitalizations within the capitalization range of the Russell 1000® Index. As of March 31, 2025, the market capitalization range of the Russell 1000® Index was approximately $272.60 million to $3.34 trillion.

Value companies, as defined by the adviser, are those included in a third-party value index or those that exhibit certain financial characteristics (e.g., price-to-earnings ratio, price-to-book ratio, enterprise value-to-EBITDA ratio, cash flow trends or dividend payment history and projections) determined by the adviser to indicate the company is undervalued by the market. For this purpose, a third-party value index is an index developed, calculated, and maintained by a third-party that measures the performance of value stocks. Companies may be undervalued due to market declines, poor economic conditions, actual or anticipated bad news regarding the issuer or its industry, or because they have been overlooked by the market. The adviser attempts to purchase the stocks of these undervalued companies and hold each stock until it has returned to favor in the market and the price has increased to, or is higher than, a level the adviser believes more accurately reflects the fair value of the company. The Portfolio’s sector exposure relative to its benchmark is driven by the adviser’s stock selection process, and, as a result, the Portfolio may at times have a relatively high percentage of its assets invested in a particular sector.

The adviser uses a variety of analytical research tools and techniques to help make decisions about buying or holding securities of companies that meet its investment criteria and sell the securities of companies that do not. The Portfolio normally invests in a relatively limited number of Companies, generally 30-50.

While most assets will be invested in U.S. equity securities, which includes common stocks, preferred stocks, warrants and securities convertible into common or preferred stocks, in keeping with the Portfolio’s objectives, it may also invest in American Depositary Receipts (ADRs) and foreign securities (up to 20% of net assets), including those of companies located in emerging markets. The Portfolio may utilize futures for cash management purposes and forwards to hedge foreign currency exposure.

Northwestern Mutual Series Fund, Inc. Prospectus 20

Large Company Value Portfolio – Summary

The adviser may sell stocks from the Portfolio if it believes a stock no longer meets established valuation criteria.

PRINCIPAL RISKS

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

•

Convertible Securities Risk – Convertible securities (which can be bonds, notes, debentures, preferred stock, or other securities which are convertible into or exercisable for common stock), are subject to both the credit and interest rate risks associated with fixed income securities and to the stock market risk associated with equity securities. The value of a convertible security may not increase or decrease as rapidly as the underlying common stock. The Portfolio may be forced to convert a security before it would otherwise choose, which may have an adverse effect on the Portfolio’s ability to achieve its investment objective.

•

Derivatives Risk – The value of a derivative generally depends upon, or is derived from, an underlying asset, reference rate or index. The primary risks associated with the Portfolio’s use of derivatives are the risk that the counterparty to a derivatives transaction fails to make the required payment or otherwise comply with the terms of the contract, the risk that changes in the value of the derivatives may not correlate as intended with the underlying asset, rate or index, the risk of adverse price movements in the market, and the risk of missed opportunities in other investments. Certain derivatives involve leverage, which could cause the Portfolio to lose more than the principal amount invested. Other risks include management, interest rate, and liquidity risks. The Portfolio’s purchase of forwards and futures contracts may involve risks related to imperfect correlation between the prices of such instruments and the price of the underlying asset, as well as leverage, liquidity and volatility risks. In addition, the purchase of forwards also involves counterparty credit risk as well as heightened market risk.

•

Equity Securities Risk – The value of equity securities, such as common and preferred stocks, could decline if the financial condition of the companies the Portfolio is invested in declines or if overall market and economic conditions deteriorate. Equity securities generally have greater price volatility than fixed income securities.

•

21 Northwestern Mutual Series Fund, Inc. Prospectus

Large Company Value Portfolio – Summary

•

Investment Style Risk – A portfolio managed using a value style of investing, such as the Portfolio, may underperform when the market does not favor the particular style used by the Portfolio. Different investment styles tend to shift in and out of favor, depending on market conditions and investor sentiment.

•

Preferred Stocks Risk – Preferred stocks often lack a fixed maturity or redemption date and are therefore more susceptible to price fluctuations when interest rates change. They also carry a greater risk of non-receipt of income because unlike interest on debt securities, dividends on preferred stocks must be declared by the issuer’s board of directors before becoming payable.

•

Security Focus Risk – The Portfolio’s performance could be more closely tied to the value of a single security or small number of securities because, although classified as a diversified investment company, the Portfolio employs a focused investment strategy and typically only invests in a small number of securities. As a result, the Portfolio’s performance could be more volatile than the performance of funds that hold a greater number of securities.

•

Warrants Investing Risk – Investments in warrants may be more volatile than the underlying common stock and may cause the Portfolio increased risk of loss if the warrants cannot be exercised prudently by the expiration date or if the warrants lack a liquid secondary market for resale. Warrants can provide exposure to an underlying stock for a portion of the price of direct ownership of shares of that stock. As a result, most warrants have some degree of leverage, which can vary depending on the type of warrant. This means that small changes in the value of the underlying stock results in larger changes in the value of the warrant. This can magnify gains when stock prices rise, but it can also magnify losses when stock prices fall.

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio's investment strategy (Strategy Index). The table also shows the Portfolio's returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

Northwestern Mutual Series Fund, Inc. Prospectus 22

Large Company Value Portfolio – Summary

	Quarter/Year	Return
Best Quarter	4th quarter, 2022	14.66%
Worst Quarter	1st quarter, 2020	-25.07%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Large Company Value Portfolio	10.69%	7.46%	7.58%
Strategy Index:	Russell 1000® Value Index (reflects no deduction for fees, expenses or taxes)	14.37%	8.69%	8.49%
Broad-Based Index:	S&P 500® Index1 (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: American Century Investment Management, Inc. (American Century)
Portfolio Managers: Brian Woglom, CFA, Vice President and Senior Portfolio Manager, joined American Century in 2005 and has served as a manager for the Portfolio since 2016.
Philip Sundell, CFA, Vice President and Portfolio Manager, joined American Century Investments in 1997 and began managing the Portfolio in April 2019.
Adam Krenn, CFA, Portfolio Manager and Senior Investment Analyst, joined American Century in 2011 and began managing the Portfolio in February 2022.

TAXES AND INTERMEDIARY COMPENSATION

23 Northwestern Mutual Series Fund, Inc. Prospectus

Domestic Equity Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is long-term growth of capital and income.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.52%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.02%
Total Annual Portfolio Operating Expenses	0.54%
Fee Waiver(1)	(0.04)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.50%

(1)

Example

1 Year	3 Years	5 Years	10 Years
$51	$169	$298	$673

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in equity securities of U.S. issuers. Generally, the companies in which the Portfolio invests will have a market value of $5 billion or more. The Portfolio employs a focused investment strategy and typically invests in a core group of 30-40 securities.

The Portfolio primarily invests in common stocks of large-capitalization companies, but may also invest in mid-capitalization companies, that its adviser believes have long-term capital appreciation potential. Typically, the Portfolio seeks securities the adviser believes are undervalued in relation to their intrinsic value. The intrinsic value of a company is the true worth of the business, which may not be fully reflected in the market price of its stock. The adviser seeks to determine a company’s intrinsic value as indicated by multiple factors, including the earnings and cash flow potential or the asset valuation of the respective issuers. On a selective basis, the adviser considers a company’s plans for future operation. The Portfolio’s sector exposure relative to its benchmark is driven by the adviser’s stock selection process, and, as a result, the Portfolio may at times have a relatively high percentage of its assets invested in a particular sector.

The Portfolio may sell a security if it no longer believes the security will contribute to meeting the investment objective of the Portfolio. In considering whether to sell a security, the Portfolio may evaluate, among other things, the factors listed above, the condition of the U.S. economy, the condition of non-U.S. economies, and changes in the condition and outlook in the issuer’s industry or sector.

PRINCIPAL RISKS

Northwestern Mutual Series Fund, Inc. Prospectus 24

Domestic Equity Portfolio – Summary

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

•

25 Northwestern Mutual Series Fund, Inc. Prospectus

Domestic Equity Portfolio – Summary

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio's investment strategy (Strategy Index). The table also shows the Portfolio's returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	2nd quarter, 2020	15.36%
Worst Quarter	1st quarter, 2020	-26.34%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Domestic Equity Portfolio	7.07%	5.90%	7.40%
Strategy Index:	Russell 1000® Value Index (reflects no deduction for fees, expenses or taxes)	14.37%	8.69%	8.49%
Broad-Based Index:	S&P 500® Index1 (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: Delaware Investments Fund Advisers (DIFA), a series of Macquarie Investment Management Business Trust
Portfolio Managers: Nikhil G. Lalvani, CFA, Managing Director, Senior Portfolio Manager and Team Leader at DIFA, has been with Macquarie Asset Management since 1997, and has co-managed the Portfolio since 2012.
Erin Ksenak, Senior Vice President and Portfolio Manager at DIFA, has been with Macquarie Asset Management since May 2017, and has co-managed the Portfolio since December 2020.

TAXES AND INTERMEDIARY COMPENSATION

Northwestern Mutual Series Fund, Inc. Prospectus 26

Equity Income Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is long-term growth of capital and income.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.63%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.03%
Total Annual Portfolio Operating Expenses	0.66%
Fee Waiver(1)	(0.09)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.57%

(1)

Example

1 Year	3 Years	5 Years	10 Years
$58	$202	$359	$814

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in stocks with a track record of paying dividends. The adviser considers a security to have a track record of paying dividends if the security has paid a dividend within the past 12 months. The Portfolio generally seeks investments in large-capitalization companies, which it considers to be those companies with a market capitalization greater than $5 billion. Additionally, the Portfolio’s yield, which reflects the level of dividends paid by the Portfolio, is expected to normally exceed the yield of the Russell 1000® Value Index. This level is merely a guideline and there can be no certainty this level will be achieved.

The Portfolio will typically employ a value approach in selecting investments. The adviser’s in-house research team seeks to identify companies that appear to be undervalued as measured by price to earnings ratio, dividend yield, enterprise value to sales, among other metrics and may be temporarily out of favor, but have good prospects for capital appreciation and dividend growth. While the Portfolio does not seek to focus its investments in any particular economic sector, the Portfolio may at times have a relatively high percentage of its assets invested in a particular sector as a result of the adviser’s stock selection process. The adviser integrates environmental, social, and governance (ESG) factors into its investment research process for certain investments. While ESG matters vary widely, the adviser generally considers ESG factors such as climate change, resource depletion, labor standards, diversity, human rights issues, and governance structure and practices. For certain types of investments, including, but not limited to, cash, currency positions, and particular types of derivatives, an ESG analysis may not be relevant or possible due to lack of data. Where ESG considerations are integrated into the investment research process, the adviser focuses on the ESG factors that it considers most likely to have a material impact on the performance of the holdings in the Portfolio. The adviser may conclude that other attributes of an investment outweigh ESG considerations when making investment decisions for the Portfolio.

27 Northwestern Mutual Series Fund, Inc. Prospectus

Equity Income Portfolio – Summary

The adviser has the discretion to deviate from the Portfolio’s normal investment criteria, as described above, and purchase securities the adviser believes could provide an opportunity for substantial appreciation. These special situations might arise when the adviser believes a security could increase in value for a variety of reasons, including a change in management, a reorganization, a spin-off of a business line, a special dividend, or some other extraordinary corporate event, a new product introduction or a favorable competitive development.

While most assets will be invested in U.S. common stocks, the Portfolio may also invest in foreign securities and American Depositary Receipts (ADRs) (up to 20% of net assets), including those of issuers located in emerging markets. The Portfolio may also invest in real estate investment trusts (REITs).

The Portfolio may sell securities for a variety of reasons such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

PRINCIPAL RISKS

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

•

Northwestern Mutual Series Fund, Inc. Prospectus 28

Equity Income Portfolio – Summary

•

Special Situation Risk – In special situations, the adviser may deviate from the Portfolio’s normal investment criteria when purchasing a security. In these special situations, there is the risk that the change or event anticipated by the adviser when purchasing a company might not occur or attract the expected attention, which could have a negative impact on the price of the issuer's securities. Investing in special situations may involve heightened volatility in the value of the securities purchased and may cause greater risk of loss.

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio's investment strategy (Strategy Index). The table also shows the Portfolio's returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

29 Northwestern Mutual Series Fund, Inc. Prospectus

Equity Income Portfolio – Summary

	Quarter/Year	Return
Best Quarter	4th quarter, 2020	20.93%
Worst Quarter	1st quarter, 2020	-28.46%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Equity Income Portfolio	11.88%	8.60%	8.40%
Strategy Index:	Russell 1000® Value Index (reflects no deduction for fees, expenses or taxes)	14.37%	8.69%	8.49%
Broad-Based Index:	S&P 500® Index1 (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: T. Rowe Price Associates, Inc. (TRPA)
Portfolio Manager: John D. Linehan, CFA, Vice President, has been with TRPA since 1998. He has managed the Portfolio since November 2015.

TAXES AND INTERMEDIARY COMPENSATION

Northwestern Mutual Series Fund, Inc. Prospectus 30

Mid Cap Growth Stock Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is long-term growth of capital.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.52%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.02%
Total Annual Portfolio Operating Expenses	0.54%
Fee Waiver(1)	0.00%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.54%

(1)

Example

1 Year	3 Years	5 Years	10 Years
$55	$173	$302	$677

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in stocks of mid-capitalization growth companies. For purposes of the Portfolio, mid-capitalization companies are those companies with market capitalizations within the capitalization range of the Russell MidCap® Growth Index. As of March 31, 2025, this range was approximately $681.01 million to $197.95 billion. The market capitalization range of the index changes over time. Securities of companies whose market capitalizations no longer fall within this range after purchase may continue to be held by the Portfolio.

Growth companies, as defined by the adviser, are those included in a third-party growth index or those that exhibit certain financial characteristics (e.g., a company’s forward and historical earnings growth, or its forward and historical revenue growth) determined by the adviser to indicate the company has above-average growth potential (e.g., sales, revenue or earnings growth that may outpace peer averages or the overall market). For this purpose, a third-party growth index is an index developed, calculated, and maintained by a third-party that measures the performance of growth stocks.

31 Northwestern Mutual Series Fund, Inc. Prospectus

Mid Cap Growth Stock Portfolio – Summary

The Portfolio seeks to reduce overall risk by diversifying across sectors, industry groups and companies. The Portfolio’s sector exposure relative to its benchmark is driven by an investment process which relies on fundamental company analysis and individual stock selection. As a result, based upon market or economic conditions, the Portfolio may at times have a relatively high percentage of its assets invested in a particular sector of the market.

The adviser may sell a security for several reasons. A security may be sold due to a change in the company’s fundamentals or if the adviser believes the security is no longer attractively valued. Investments may also be sold if the adviser identifies a stock that it believes offers a better investment opportunity.

The Portfolio invests primarily in U.S. common stocks. The Portfolio may invest up to 20% of net assets in American Depositary Receipts (ADRs). The Portfolio may additionally invest in real estate investment trusts (REITs).

PRINCIPAL RISKS

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

•

Investment Style Risk – A portfolio managed using a growth style of investing, such as the Portfolio, may underperform when the market does not favor the particular style used by the Portfolio. Different investment styles tend to shift in and out of favor, depending on market conditions and investor sentiment.

•

Northwestern Mutual Series Fund, Inc. Prospectus 32

Mid Cap Growth Stock Portfolio – Summary

interest rates; defaults by mortgagors or other borrowers and tenants; lack of availability of mortgage funds or financing; extended vacancies of properties, especially during economic downturns; casualty or condemnation losses; property taxes and operating losses; and governmental actions, such as changes to tax laws, zoning regulations or environmental regulations. REITs are dependent upon the quality of their management, may have limited financial resources and heavy cash flow dependency, may not be diversified geographically or by property type, and may be subject to self-liquidation.

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio's investment strategy (Strategy Index). The table also shows the Portfolio's returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Prior to October 28, 2024, the Portfolio was managed by a different sub-adviser. Performance shown may have been different if the current strategy, and the current sub-adviser, had been in place during the periods shown. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	4th quarter, 2020	26.37%
Worst Quarter	1st quarter, 2020	-24.21%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Mid Cap Growth Stock Portfolio	8.21%	5.55%	7.03%
Strategy Index:	Russell MidCap® Growth Index (reflects no deduction for fees, expenses or taxes)	22.10%	11.47%	11.54%
Broad-Based Index:	S&P 500® Index1 (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: J.P. Morgan Investment Management, Inc. (JPMIM)
Portfolio Managers: Felise L. Agranoff, CFA, Managing Director of JPMIM and Portfolio Manager joined JPMIM in 2004 and has co-managed the Portfolio since October 2024.
Daniel Bloomgarden, CFA, Managing Director of JPMIM and Portfolio Manager, joined JPMIM in 2015 and has co-managed the Portfolio since October 2024.

TAXES AND INTERMEDIARY COMPENSATION

33 Northwestern Mutual Series Fund, Inc. Prospectus

Index 400 Stock Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to achieve investment results that approximate the performance of the S&P MidCap 400® Stock Price Index (“S&P MidCap 400® Index”).

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.25%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.03%
Total Annual Portfolio Operating Expenses	0.28%
Fee Waiver(1)	(0.04)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.24%

(1)

Example

1 Year	3 Years	5 Years	10 Years
$25	$86	$153	$352

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

The Portfolio employs a “passive management,” or indexing, investment approach designed to track the performance of the S&P MidCap 400® Index. The S&P MidCap 400® Index is composed of the stocks of companies whose capitalizations generally are smaller than those of companies that comprise the S&P 500® Index. The S&P MidCap 400® Index does not include the stocks of the very large companies that account for most of the weighting in the S&P 500® Index. As of March 31, 2025, the market capitalization range of the S&P MidCap 400® Index was approximately $2.10 billion to $70.47 billion. Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in stocks included in the underlying index. Further, the Portfolio attempts to achieve its objective by investing all, or substantially all, of its assets in the stocks that make up the S&P MidCap 400® Index, holding each stock in approximately the same proportion as its weighting in the Index. This is known as a full replication strategy. The Portfolio may also invest in equity index futures and exchange traded funds for cash management and liquidity purposes and to help achieve full replication.

Standard & Poor’s constructs the index by first identifying major industry categories and then allocating a representative sample of the larger and more liquid stocks in those industries to the index. S&P weights each stock according to its float-adjusted market value. For example, the 50 largest companies in the index may account for over 50% of its value.

Because the Portfolio is managed with a goal of fully replicating the underlying S&P MidCap 400® Index, the approach employed by the Portfolio with respect to reconstitution and rebalancing aligns with the process followed generally by the S&P MidCap 400® Index. Changes to the underlying company constituents of the S&P MidCap 400® Index are made on an as-needed basis and are usually announced several days before they are scheduled to be implemented. The S&P MidCap 400® Index typically makes weightings adjustments based on changes in the amount of a constituent company’s shares outstanding on a quarterly basis. The constituent and share-based weightings changes made by S&P MidCap 400® Index will be made in a parallel fashion by the Portfolio on substantially the same timeline. Additionally, the Portfolio utilizes cash equitization instruments, and rebalancing occurs as necessary to maintain balances within established target ranges for these instruments. Cash equitization as employed by

Northwestern Mutual Series Fund, Inc. Prospectus 34

Index 400 Stock Portfolio – Summary

the Portfolio is a strategy pursuant to which the Portfolio will acquire certain derivative instruments, such as equity index futures, whereby the futures will be utilized to replicate index returns and enable the Portfolio to be fully invested, while still maintaining cash balances as needed by the Portfolio. This strategy works to limit the extent to which uninvested cash will weigh negatively on overall Portfolio returns when markets go up.

The Index 400 Stock Portfolio’s ability to match the performance of the S&P MidCap 400® Index will be affected to some extent by the size and timing of cash flows into and out of the Index 400 Stock Portfolio. The Portfolio will be managed with a view to reducing such effects.

PRINCIPAL RISKS

•

35 Northwestern Mutual Series Fund, Inc. Prospectus

Index 400 Stock Portfolio – Summary

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio's investment strategy (Strategy Index). The table also shows the Portfolio's returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Prior to February 1, 2021, the Portfolio was managed by Mason Street Advisors, LLC. Performance shown may have been different if the current strategy, and the current sub-adviser, had been in place during the periods shown. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	4th quarter, 2020	24.28%
Worst Quarter	1st quarter, 2020	-29.68%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Index 400 Stock Portfolio	13.63%	10.07%	9.41%
Strategy Index:	S&P MidCap 400® Index (reflects no deduction for fees, expenses or taxes)	13.93%	10.34%	9.68%
Broad-Based Index:	S&P 500® Index1 (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: Northern Trust Investments, Inc. (Northern Trust)
Portfolio Managers: Lucy Johnston, Portfolio Manager, joined Northern Trust in 1997 and has managed the Portfolio since February 2021.
Keith Carroll, Portfolio Manager, joined Northern Trust in 2007 and has managed the Portfolio since September 2024.

TAXES AND INTERMEDIARY COMPENSATION

Northwestern Mutual Series Fund, Inc. Prospectus 36

Mid Cap Value Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is long-term capital growth. Current income is a secondary objective.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.85%
Distribution and Service (12b-1) Fees	None
Other Expenses(1)	0.03%
Total Annual Portfolio Operating Expenses(1)	0.88%
Fee Waiver(2)	(0.16)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1),(2)	0.72%

(1)

(2)

Example

1 Year	3 Years	5 Years	10 Years
$74	$265	$472	$1,070

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in securities of mid-capitalization value companies. For purposes of the Portfolio, mid-capitalization companies are those companies with market capitalizations within the capitalization range of the Russell 3000® Index, excluding the largest 100 such companies, (approximately $5.20 million to $99.03 billion as of March 31, 2025). The adviser intends to manage the Portfolio so that its weighted capitalization falls within the capitalization range of the members of the Russell MidCap® Index (approximately $272.60 million to $197.95 billion as of March 31, 2025).

Value companies, as defined by the adviser, are those included in a third-party value index or those that exhibit certain financial characteristics (e.g., price-to-earnings ratio, price-to-book ratio, enterprise value-to-EBITDA ratio, cash flow trends or dividend payment history and projections) determined by the adviser to indicate the company is undervalued by the market. For this purpose, a third-party value index is an index developed, calculated, and maintained by a third-party that measures the performance of value stocks. The adviser intends to hold each security until it has returned to favor in the market and the price has increased to, or is higher than a level the adviser believes more accurately reflects the fair value of the company. The adviser uses a variety of analytical research tools and techniques to help make decisions about buying or holding securities of companies that meet its

37 Northwestern Mutual Series Fund, Inc. Prospectus

Mid Cap Value Portfolio – Summary

investment criteria and sell the securities of companies that do not. The Portfolio’s sector exposure relative to its benchmark is driven by the adviser’s stock selection process, and, as a result, the Portfolio may at times have a relatively high percentage of its assets invested in a particular sector.

While most assets will be invested in U.S. equity securities, which includes common stocks, preferred stocks, warrants and securities convertible into common or preferred stocks, in keeping with the Portfolio’s objectives, it may also invest in American Depositary Receipts (ADRs) and foreign securities (up to 20% of net assets), including those of companies located in emerging markets. The Portfolio may also invest in real estate investment trusts (REITs). The Portfolio may utilize futures for cash management purposes and forwards to hedge foreign currency exposure.

The adviser may sell a stock from the Portfolio if it believes the stock no longer meets established valuation criteria, the stock’s risk parameters outweigh its return opportunity, specific events alter a stock’s prospects or more attractive opportunities are identified. In seeking to achieve its investment objective, the adviser may sell shares from the Portfolio without regard to the length of time a security has been held.

PRINCIPAL RISKS

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

•

Derivatives Risk – The value of a derivative generally depends upon, or is derived from, an underlying asset, reference rate or index. The primary risks associated with the Portfolio’s use of derivatives are the risk that the counterparty to a derivatives transaction fails to make the required payment or otherwise comply with the terms of the contract, the risk that changes in the value of the derivatives may not correlate as intended with the underlying asset, rate or index, and the risk of missed opportunities in other investments. Certain derivatives involve leverage, which could cause the Portfolio to lose more than the principal amount invested. Other risks include management, market, interest rate, and liquidity risks. The Portfolio’s purchase of forwards and futures contracts may involve risks related to imperfect correlation between the prices of such instruments and the price of the underlying asset, as well as leverage, liquidity and volatility risks. In addition, the purchase of forwards also involves counterparty credit risk as well as heightened market risk.

•

Northwestern Mutual Series Fund, Inc. Prospectus 38

Mid Cap Value Portfolio – Summary

•

PERFORMANCE

39 Northwestern Mutual Series Fund, Inc. Prospectus

Mid Cap Value Portfolio – Summary

indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	4th quarter, 2020	16.84%
Worst Quarter	1st quarter, 2020	-27.57%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Mid Cap Value Portfolio	8.65%	7.42%	8.15%
Strategy Index:	Russell MidCap® Value Index (reflects no deduction for fees, expenses or taxes)	13.07%	8.60%	8.10%
Broad-Based Index:	S&P 500® Index1 (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: American Century Investment Management, Inc. (American Century)
Portfolio Managers: Michael Liss, CFA, CPA, Vice President and Senior Portfolio Manager, has served American Century as a Portfolio Manager since 2004 and began managing the Portfolio in 2009.
Kevin Toney, CFA, Chief Investment Officer - Global Value Equity, Senior Vice President and Senior Portfolio Manager, has served American Century as a Portfolio Manager since 2006 and began managing the Portfolio in 2009.
Brian Woglom, CFA, Vice President and Senior Portfolio Manager, has served American Century as a Portfolio Manager since 2012 and began managing the Portfolio in 2012.
Nathan Rawlins, CFA, Portfolio Manager and Senior Investment Analyst, has served American Century as a Portfolio Manager since March 2022 and began managing the Portfolio in May 2022.

TAXES AND INTERMEDIARY COMPENSATION

Northwestern Mutual Series Fund, Inc. Prospectus 40

Small Cap Growth Stock Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is long-term growth of capital.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.53%
Distribution and Service (12b-1) Fees	None
Other Expenses(1)	0.03%
Total Annual Portfolio Operating Expenses(1)	0.56%

(1)

Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

1 Year	3 Years	5 Years	10 Years
$57	$179	$313	$701

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in stocks of small-capitalization growth companies. For purposes of the Portfolio, small-capitalization companies are those companies with market capitalizations within the capitalization range of the Russell 2000® and S&P SmallCap 600® Indices. As of March 31, 2025, this range was approximately $5.20 million to $14.96 billion. Some of the companies in which the Portfolio invests may be considered micro cap companies (defined as companies with stock market capitalizations less than $500 million).

Growth companies, as defined by the adviser, are those included in a third-party growth index or those that exhibit certain financial characteristics (e.g., earnings per share growth or revenue growth) determined by the adviser to indicate the company has above-average growth potential (e.g., sales, revenue, or earnings growth that may outpace peer averages or the overall market). For this purpose, a third party growth index is an index developed, calculated, and maintained by a third-party that measures the performance of growth stocks. The adviser’s investment process is derived from the observation that the quality and persistence of a company’s business is often not reflected in its current stock price. The investment team conducts fundamental research on companies elevated by the screening process. Research emphasizes the sustainability of a business’s competitive advantages and the ability to generate revenue and increase profit margins. Other important considerations include capital allocation discipline, and other qualitative factors such as strength of company management, analysis of products and competition, and financially material environmental, social, and/or governance (ESG) characteristics. Examples of ESG factors that may be considered include, but are not limited to, employee engagement, talent attraction and retention, incentive structures, and corporate strategy. Consideration of ESG factors may not be determinative in the adviser’s investment process and the adviser may conclude that other attributes of an investment outweigh ESG considerations when making investment decisions for the Portfolio. Valuation analysis is an important component of the investment process and consists of both cash flow and earnings ratios that are compared with the industry average.

Portfolio construction emphasizes stock specific risk while minimizing other sources of active risk. The Portfolio is structured so that its sector weights are generally similar to those of the Russell 2000® Growth Index, an index that aligns with the Portfolio’s strategy. As a result, the Portfolio may at times have a relatively high percentage of its assets invested in a particular sector and may

41 Northwestern Mutual Series Fund, Inc. Prospectus

Small Cap Growth Stock Portfolio – Summary

hold securities which are not represented in the benchmark. However, in constructing the Portfolio, the investment team monitors different sources of active risk including stock-specific risk, industry risk and style risk. The goal of this analysis is to ensure that the Portfolio remains well diversified and does not have unrewarded or unintended industry and style exposure as a consequence of individual stock selections.

The Portfolio invests primarily in U.S. common stocks. The Portfolio may also invest up to 20% of net assets in American Depositary Receipts (ADRs) and other equity securities of foreign issuers which are denominated in U.S. dollars. The Portfolio may also invest in real estate investment trusts (REITs).

The Portfolio may also utilize exchange-traded funds as part of its cash management strategy.

The Portfolio may sell a security for a variety of reasons including when it no longer demonstrates improving quality or exhibits strong fundamental momentum, when fundamentals have changed, where the risk/reward assessment is no longer favorable, or to redeploy assets into more promising opportunities. The Portfolio may, but is not required, to exit a position if the company’s capitalization grows beyond the small cap range.

PRINCIPAL RISKS

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money. The value of securities identified using quantitative analysis can react differently to issuer, political, market and economic developments from the market as a whole or securities identified using only fundamental analysis. The factors used in quantitative analysis and the weight placed on those factors may not be predictive of a security’s value.

•

Northwestern Mutual Series Fund, Inc. Prospectus 42

Small Cap Growth Stock Portfolio – Summary

political and economic conditions, or diplomatic developments. Foreign securities may be adversely affected by decreases in foreign currency values relative to the U.S. dollar and may be less liquid, more volatile, and harder to value than U.S. securities. The Portfolio’s investments in emerging markets heighten these risks due to a lack of established legal, political, business and social frameworks to support securities markets.

•

Liquidity Risk – Markets for small and micro cap stocks and foreign securities, in particular emerging markets securities, may be less liquid than markets for larger cap stocks and domestic securities, and therefore may be difficult to purchase or sell at an advantageous time or price, if at all. These risks may be magnified during periods of economic turmoil or in an extended economic downturn.

•

Micro Cap Company Risk – Investing in micro cap stocks may cause the Portfolio to experience more rapid and extreme changes in value than a fund that invests solely in small, mid and large cap stocks due to a more limited track record, narrower product markets, more limited resources, higher risk of failure, and less liquid trading markets.

•

Small Cap Company Risk – Investing in small cap stocks may cause greater risk of loss and price fluctuation than investing in stocks of larger cap companies due to a more limited track record, narrower product markets, more limited resources and less liquid trading markets. These stocks may be more volatile and more difficult to buy and sell than stocks with larger capitalizations.

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio's investment strategy (Strategy Index). The table also shows the Portfolio's returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

43 Northwestern Mutual Series Fund, Inc. Prospectus

Small Cap Growth Stock Portfolio – Summary

	Quarter/Year	Return
Best Quarter	4th quarter, 2020	31.83%
Worst Quarter	1st quarter, 2020	-26.17%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Small Cap Growth Stock Portfolio	13.18%	5.89%	8.12%
Strategy Index:	Russell 2000® Growth Index (reflects no deduction for fees, expenses or taxes)	15.15%	6.86%	8.09%
Broad-Based Index:	S&P 500® Index1 (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: Wellington Management Company LLP (Wellington Management)
Portfolio Manager: David Siegle, CFA, Managing Director and Equity Portfolio Manager, joined Wellington Management in 2001 and has co-managed the Portfolio since 2023.

TAXES AND INTERMEDIARY COMPENSATION

Northwestern Mutual Series Fund, Inc. Prospectus 44

Index 600 Stock Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to achieve investment results that approximate the performance of the Standard & Poor’s SmallCap 600® Index (“S&P SmallCap 600® Index”).

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.22%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.05%
Total Annual Portfolio Operating Expenses	0.27%

Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

1 Year	3 Years	5 Years	10 Years
$28	$87	$152	$343

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

The Portfolio employs a “passive management,” or indexing, investment approach designed to track the performance of the S&P SmallCap 600® Index. S&P SmallCap 600® Index is composed of domestic stocks with market capitalizations ranging between approximately $427.30 million and $12.05 billion as of March 31, 2025. Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in stocks included in the underlying index. Further, the Portfolio attempts to achieve its objective by investing all, or substantially all, of its assets in stocks that make up the S&P SmallCap 600® Index, holding each stock in approximately the same proportion as its weighting in the Index. This is known as a full replication strategy. The Portfolio may also invest in equity index futures and exchange traded funds for cash management and liquidity purposes and to help achieve full replication.

Because the Portfolio is managed with a goal of fully replicating the underlying S&P SmallCap 600® Index, the approach employed by the Portfolio with respect to reconstitution and rebalancing aligns with the process followed generally by the S&P SmallCap 600® Index. Changes to the underlying company constituents of the S&P SmallCap 600® Index are made on an as-needed basis and are usually announced several days before they are scheduled to be implemented. The S&P SmallCap 600® Index typically makes weightings adjustments based on changes in the amount of a constituent company’s shares outstanding on a quarterly basis. The constituent and share-based weightings changes made by S&P SmallCap 600® Index will be made in a parallel fashion by the Portfolio on substantially the same timeline. Additionally, the Portfolio utilizes cash equitization instruments, and rebalancing occurs as necessary to maintain balances within established target ranges for these instruments. Cash equitization as employed by the Portfolio is a strategy pursuant to which the Portfolio will acquire certain derivative instruments, such as equity index futures, whereby the futures will be utilized to replicate index returns and enable the Portfolio to be fully invested, while still maintaining cash balances as needed by the Portfolio. This strategy works to limit the extent to which uninvested cash will weigh negatively on overall Portfolio returns when markets go up.

The Index 600 Stock Portfolio’s ability to match the performance of the S&P SmallCap 600® Index will be affected to some extent by the size and timing of cash flows into and out of the Index 600 Stock Portfolio. The Portfolio will be managed with a view to reducing such effects.

45 Northwestern Mutual Series Fund, Inc. Prospectus

Index 600 Stock Portfolio – Summary

PRINCIPAL RISKS

•

Northwestern Mutual Series Fund, Inc. Prospectus 46

Index 600 Stock Portfolio – Summary

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio's investment strategy (Strategy Index). The table also shows the Portfolio's returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Prior to February 1, 2021, the Portfolio was managed by Mason Street Advisors, LLC. Performance shown may have been different if the current strategy, and the current sub-adviser, had been in place during the periods shown. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	4th quarter, 2020	31.17%
Worst Quarter	1st quarter, 2020	-32.66%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Index 600 Stock Portfolio	8.43%	8.01%	8.61%
Strategy Index:	S&P SmallCap 600® Index (reflects no deduction for fees, expenses or taxes)	8.70%	8.36%	8.96%
Broad-Based Index:	S&P 500® Index1 (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: Northern Trust Investments, Inc. (Northern Trust)
Portfolio Managers: Keith Carroll, Portfolio Manager, joined Northern Trust in 2007 and has managed the Portfolio since February 2021.
Lucy Johnston, Portfolio Manager, joined Northern Trust in 1997 and has managed the Portfolio since September 2024

TAXES AND INTERMEDIARY COMPENSATION

47 Northwestern Mutual Series Fund, Inc. Prospectus

Small Cap Value Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is long-term growth of capital.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.85%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.03%
Total Annual Portfolio Operating Expenses	0.88%
Fee Waiver(1)	(0.01)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.87%

(1)

Example

1 Year	3 Years	5 Years	10 Years
$89	$280	$487	$1,083

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in securities of small-capitalization value companies. For purposes of the Portfolio, small-capitalization companies are those companies with market capitalizations that do not exceed the maximum market capitalization of any security in the Russell 2000® Index (approximately $14.96 billion as of March 31, 2025). The market capitalizations of companies in the Portfolio and the Index changes over time and securities of companies whose market capitalizations no longer fall within this range after purchase may continue to be held by the Portfolio. The Portfolio may, on occasion, purchase companies with a market capitalization above the range. Securities falling outside of the market capitalization range noted above will be included in the overall calculation of assets but not counted as fulfilling the 80% minimum. The Portfolio may also invest in the equity securities of micro cap companies (defined as companies with stock market capitalizations less than $500 million at the time of investment).

While the Portfolio does not seek to focus its investments in any particular economic sector, the Portfolio may at times have a relatively high percentage of its assets invested in a particular sector as a result of the adviser’s stock selection process. The adviser integrates environmental, social, and governance (ESG) factors into its investment research process for certain investments. While ESG matters vary widely, the adviser generally considers ESG factors such as climate change, resource depletion, labor standards, diversity, human rights issues, and governance structure and practices. For certain types of investments, including, but not limited to, cash, currency positions, and particular types of derivatives, an ESG analysis may not be relevant or possible due to lack of data.

Northwestern Mutual Series Fund, Inc. Prospectus 48

Small Cap Value Portfolio – Summary

Where ESG considerations are integrated into the investment research process, the adviser focuses on the ESG factors that it considers most likely to have a material impact on the performance of the holdings in the Portfolio. The adviser may conclude that other attributes of an investment outweigh ESG considerations when making investment decisions for the Portfolio.

In pursuing its investment objective, the adviser has the discretion to deviate from its normal investment criteria, as described above, and purchase securities the adviser believes could provide an opportunity for substantial appreciation. These special situations might arise when the adviser believes a security could increase in value for a variety of reasons, including a change in management, a reorganization, a spin-off of a business line, a special dividend, or some other extraordinary corporate event, a new product introduction or innovation, or a favorable competitive environment.

While most assets will be invested in U.S. common stocks, other securities may also be purchased, including American Depositary Receipts (ADRs) and foreign securities (up to 20% of net assets), real estate investment trust (REITs) and securities of other investment companies, including open-end funds, closed-end funds, exchange traded funds (ETFs) and business development companies (BDCs), in keeping with the Portfolio’s objectives.

The Portfolio may sell securities for a variety of reasons, such as to secure gains, limit losses or redeploy assets into more promising opportunities.

PRINCIPAL RISKS

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

•

49 Northwestern Mutual Series Fund, Inc. Prospectus

Small Cap Value Portfolio – Summary

•

Other Investment Companies Risk – The Portfolio will indirectly bear its pro rata portion of the expenses of the investment companies in which it invests, including advisory fees, in addition to the direct expenses of the Portfolio. The expenses associated with some business development companies may be significant. Investments in other investment companies are subject to market and selection risks, and generally entail the same risks as the underlying securities held by them. ETFs, closed-end funds and BDCs are also subject to the risk that their market prices may trade at a premium or a discount to their net asset value, which means the Portfolio will overpay for a fund’s assets if it is trading at a premium and will get less than the value of the fund’s assets when selling if it is trading at a discount. An active trading market for an ETF, closed-end fund or BDC may not be developed or maintained. In the event of a trading halt by the exchange, the Portfolio would be unable to sell its ETF, closed-end or BDC shares unless and until trading is resumed. BDCs invest in small and medium-sized private companies that may not have access to public equity markets. As a result, a BDC’s portfolio may be less liquid, may be more adversely affected by poor economic or market conditions, and may be adversely affected by risks associated with industries and sectors in which portfolio companies may concentrate.

•

Special Situation Risk – In special situations, the adviser may deviate from the Portfolio’s normal investment criteria when purchasing a security. In these special situations, there is the risk that the change or event anticipated by the adviser when purchasing a company might not occur or attract the expected attention, which could have a negative impact on the price of the company's securities. Investing in special situations may involve heightened volatility in the value of the securities purchased and may cause greater risk of loss.

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio's investment strategy (Strategy Index). The table also shows the Portfolio's returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

Northwestern Mutual Series Fund, Inc. Prospectus 50

Small Cap Value Portfolio – Summary

	Quarter/Year	Return
Best Quarter	4th quarter, 2020	28.62%
Worst Quarter	1st quarter, 2020	-31.21%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Small Cap Value Portfolio	10.36%	6.59%	7.77%
Strategy Index:	Russell 2000® Value Index (reflects no deduction for fees, expenses or taxes)	8.06%	7.29%	7.14%
Broad-Based Index:	S&P 500® Index1 (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: T. Rowe Price Investment Management, Inc. (TRPIM)
Portfolio Manager: J. David Wagner, CFA, a Vice President of TRPIM, has managed the Portfolio in his capacity with TRPIM since March 2022 and had served as portfolio manager to the Portfolio in his capacity with T. Rowe Price Associates, Inc. since 2014. Mr. Wagner joined T. Rowe Price in 2000.

TAXES AND INTERMEDIARY COMPENSATION

51 Northwestern Mutual Series Fund, Inc. Prospectus

International Growth Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is long-term growth of capital.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.58%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.03%
Total Annual Portfolio Operating Expenses	0.61%
Fee Waiver(1)	0.00%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.61%

(1)

Example

1 Year	3 Years	5 Years	10 Years
$62	$195	$340	$762

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in securities of growth companies. In addition, the Portfolio typically invests in securities of companies from three or more countries other than the United States. Companies from a country other than the United States shall refer to:

•

companies whose principal trading activities are outside the U.S.; or

•

companies whose securities are denominated in non U.S. dollar currencies; or

•

companies that: are organized under the laws of, or have principal offices in, a country other than the U.S., and derive 50% or more of their total revenue from either goods or services produced or sales made in markets outside the U.S.

The Portfolio may invest in emerging markets but will normally limit such investments to 20% of its net assets, measured at the time of purchase. The adviser normally invests the Portfolio’s assets primarily in foreign common stocks and American Depositary Receipts (ADRs) and other depositary receipts. While the adviser normally allocates the Portfolio’s assets across different countries and regions, the Portfolio may invest a relatively large percentage of its assets in a single country, a small number of countries, or a particular geographic region. The Portfolio invests primarily in large capitalization companies, but may invest in companies of any size. Although the Portfolio primarily invests its assets in issuers located outside the U.S., it also invests in U.S. issuers.

Growth companies, as defined by the adviser, are those included in a third-party growth index or classified as a growth company by a third-party vendor or those that exhibit certain financial characteristics (e.g., projected earnings per share growth, sales growth per share, free cash flow growth, or trailing earnings per share growth; research and development expenses relative to other expenses; or capital investments to grow or expand its business) determined by the adviser to indicate the company has above-average growth

Northwestern Mutual Series Fund, Inc. Prospectus 52

International Growth Portfolio – Summary

potential (e.g., sales, revenue or earnings growth that may outpace peer averages or the overall market). For this purpose, a third-party growth index is an index developed, calculated, and maintained by a third-party that measures the performance of growth stocks. In buying and selling securities for the Portfolio, the adviser relies on fundamental analysis, which involves a “bottom up” assessment of a company’s potential for success in light of factors such as its financial condition, earnings outlook, strategy, management, industry position, and economic and market conditions. While the Portfolio does not seek to focus its investments in any particular sector, the Portfolio may at times have a relatively high percentage of its assets invested in a particular sector as a result of the adviser’s stock selection process.

The Portfolio may reduce or sell its position in a particular holding when the adviser believes a stock is fully valued, the conditions upon which the adviser based its original investment thesis no longer holds true, or due to portfolio construction considerations.

PRINCIPAL RISKS

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

•

ADR Risk – ADRs are receipts representing ownership of shares of a foreign issuer held by a U.S. bank or similar financial institution that entitle the holder to dividends and capital gains on the underlying foreign shares. ADRs are alternatives to directly purchasing the underlying foreign securities in their national markets and currencies. They, and other similar depositary receipts, are subject to many of the risks associated with direct investments in foreign securities, such as currency risk, political and economic risk and market risk, because their values depend on the performance of the non-dollar denominated underlying foreign securities. The Portfolio is also subject to fees and the credit risk of the financial institution holding the ADRs or other depositary receipts. ADRs may be “sponsored,” meaning that they are implemented by a financial institution in collaboration with the issuing foreign company, or “unsponsored,” meaning that the financial institution created the instrument without the sponsorship or direct involvement of the foreign company. Differing registration requirements apply to each type of ADR. ADRs may transact on exchanges or on over-the-counter markets (“OTC”). Conducting transactions in OTC markets may result in higher costs, a lack of pricing transparency and lower liquidity when compared with exchange-based transactions. Risks associated with different ADR types will vary, based upon differences in registration, reporting and disclosure requirements that apply to such ADRs and the characteristics of the market in which transactions for the particular ADR are conducted.

•

Foreign Currency Risk – The risk that foreign (non-U.S. dollar) currency denominated securities, or derivatives that provide exposure to foreign currencies, may be adversely affected by decreases in foreign currency values relative to the U.S. dollar. Investments in securities subject to foreign currency risk may have more rapid and extreme changes in value or more losses than investments in U.S. dollar denominated securities.

•

Geographic Focus Risk – To the extent a relatively large percentage of the Portfolio’s assets are invested in issuers located in a single country, a small number of countries, or a particular geographic region, the Portfolio’s performance could be more volatile than that of a more geographically diversified fund, and the Portfolio’s performance may be more closely tied to the market, currency, economic, political, or regulatory conditions in those countries or that region.

53 Northwestern Mutual Series Fund, Inc. Prospectus

International Growth Portfolio – Summary

•

Liquidity Risk – Markets for small cap stocks and foreign securities, in particular emerging markets securities, may be less liquid than markets for larger cap stocks and domestic securities, and therefore may be difficult to purchase or sell at an advantageous time or price, if at all. These risks may be magnified during periods of economic turmoil or in an extended economic downturn.

•

Small and Mid Cap Company Risk – Investing in small and mid cap stocks may cause greater risk of loss and price fluctuation than investing in stocks of larger cap companies due to a more limited track record, narrower product markets, more limited resources and less liquid trading markets. These stocks may be more volatile and more difficult to buy and sell than stocks with larger capitalizations.

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio’s investment strategy (Strategy Index). The table also shows the Portfolio’s returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Prior to November 1, 2021, the Portfolio was managed by a different sub-adviser. Performance shown may have been different if the current strategy, and the current sub-adviser, had been in place during the periods shown. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

Northwestern Mutual Series Fund, Inc. Prospectus 54

International Growth Portfolio – Summary

	Quarter/Year	Return
Best Quarter	2nd quarter, 2020	17.75%
Worst Quarter	1st quarter, 2020	-17.19%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	International Growth Portfolio	5.30%	5.96%	7.03%
Strategy Index:	MSCI EAFE® Growth Index (Net) (reflects no deduction for fees, expenses or taxes)	2.05%	4.00%	5.84%
Broad-Based Index:	MSCI® All Country World (ex- US) Index (Net)1 (reflects no deduction for fees, expenses or taxes)	5.53%	4.10%	4.80%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: FIAM LLC (FIAM)
Portfolio Manager: Jed Weiss, Portfolio Manager, began managing the Portfolio in 2015.

TAXES AND INTERMEDIARY COMPENSATION

55 Northwestern Mutual Series Fund, Inc. Prospectus

Research International Core Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to seek capital appreciation.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.75%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.04%
Total Annual Portfolio Operating Expenses	0.79%
Fee Waiver(1)	(0.07)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.72%

(1)

Example

1 Year	3 Years	5 Years	10 Years
$74	$245	$432	$971

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

The Portfolio normally invests primarily in foreign equity securities, including emerging market equity securities. The Portfolio normally invests its assets across different industries, sectors, countries, and regions, but the Portfolio may invest a significant percentage of its assets in issuers in a single industry, sector, country, or a particular geographic region.

In conjunction with a team of investment research analysts, sector leaders select investments for the Portfolio. The adviser generally manages the Portfolio to align with the MSCI EAFE® (Europe-Australasia-Far East) Index (the “Index”) with respect to sector weightings. The Portfolio does not, as a matter of policy, concentrate in any particular industry. The Portfolio is not constrained by any particular investment style. The adviser may invest the Portfolio’s assets in the stocks of companies it believes to have above average earnings growth potential compared to other companies (growth companies), in the stocks of companies it believes are undervalued compared to their perceived worth (value companies), or in a combination of growth and value companies. The Portfolio’s investments in equity securities may include securities of companies of any capitalization level, and could include common stocks, preferred stocks, securities convertible into stock and American Depositary Receipts (ADRs) and other depositary receipts for those securities.

The adviser uses an active “bottom up” investment approach to buying and selling investments for the Portfolio, which emphasizes individual stock selection. Investments are selected primarily based on fundamental analysis of individual issuers and their potential in light of their financial condition, and market, economic, political and regulatory conditions. Factors considered may include analysis of an issuer’s earnings, cash flows, competitive position and management ability. The adviser may also consider environmental, social and governance (ESG) factors in its fundamental investment analysis where the adviser believes such factors could materially impact the economic value of an issuer. ESG factors considered may include, but are not limited to, climate change, resource depletion, an issuer's governance structure and practices, data protection and privacy issues, and diversity and labor practices. Consideration of ESG factors may not be determinative in the adviser’s investment process and the adviser may

Northwestern Mutual Series Fund, Inc. Prospectus 56

Research International Core Portfolio – Summary

conclude that other attributes of an investment outweigh ESG considerations when making investment decisions for the Portfolio. Quantitative screening tools that systematically evaluate an issuer’s valuation, price and earnings momentum, earnings quality and other factors, may also be considered.

The adviser may sell securities for a variety of reasons such as to seek to secure gains, limit losses, or redeploy assets into opportunities believed to be more promising, among others.

PRINCIPAL RISKS

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

•

ADR Risk – ADRs are receipts representing ownership of shares of a foreign issuer held by a U.S. bank or similar financial institution that entitle the holder to dividends and capital gains on the underlying foreign shares. ADRs are alternatives to directly purchasing the underlying foreign securities in their national markets and currencies. They, and other similar depositary receipts, are subject to many of the risks associated with direct investments in foreign securities, such as currency risk, political and economic risk and market risk, because their values depend on the performance of the non-dollar denominated underlying foreign securities. The Portfolio is also subject to fees and the credit risk of the financial institution holding the ADRs or other depositary receipts. ADRs may be “sponsored,” meaning that they are implemented by a financial institution in collaboration with the issuing foreign company, or “unsponsored,” meaning that the financial institution created the instrument without the sponsorship or direct involvement of the foreign company. Differing registration requirements apply to each type of ADR. ADRs may transact on exchanges or on over-the-counter markets (“OTC”). Conducting transactions in OTC markets may result in higher costs, a lack of pricing transparency and lower liquidity when compared with exchange-based transactions. Risks associated with different ADR types will vary, based upon differences in registration, reporting and disclosure requirements that apply to such ADRs and the characteristics of the market in which transactions for the particular ADR are conducted.

•

57 Northwestern Mutual Series Fund, Inc. Prospectus

Research International Core Portfolio – Summary

reporting, accounting and auditing standards, and nationalization, expropriation or confiscatory taxation, currency blockage, political and economic conditions, or diplomatic developments. Foreign securities may be less liquid, more volatile, and harder to value than U.S. securities.

•

Sector Focus Risk – To the extent the Portfolio invests a relatively high percentage of its assets in a particular sector or industries within a sector, it will have greater exposure to the risks associated with that sector, including the risk that the securities of companies within the sector will underperform due to adverse economic conditions, regulatory or legislative changes, or increased competition affecting the sector. To the extent the Portfolio is underweight in other sectors, the Portfolio risks missing out on advances in those sectors.

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio’s investment strategy (Strategy Index). The table also shows the Portfolio’s returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Prior to November 1, 2021, the Portfolio was managed by a different sub-adviser. Performance shown may have been different if the current strategy, and the current sub-adviser, had been in place during the periods shown. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

Northwestern Mutual Series Fund, Inc. Prospectus 58

Research International Core Portfolio – Summary

	Quarter/Year	Return
Best Quarter	2nd quarter, 2020	16.69%
Worst Quarter	1st quarter, 2020	-19.69%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Research International Core Portfolio	3.25%	4.20%	5.48%
Strategy Index:	MSCI EAFE® Index (Net) (reflects no deduction for fees, expenses or taxes)	3.82%	4.73%	5.20%
Broad-Based Index:	MSCI® All Country World (ex- US) Index (Net)1 (reflects no deduction for fees, expenses or taxes)	5.53%	4.10%	4.80%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: Massachusetts Financial Services Company (MFS®)
Portfolio Managers: John Mahoney, CFA, Investment Officer of MFS, joined MFS in 2005 and has managed the Portfolio since January 2024.
Nicholas Paul, CFA, Investment Officer of MFS, joined MFS in 2010 and has managed the Portfolio since December 2022.

TAXES AND INTERMEDIARY COMPENSATION

59 Northwestern Mutual Series Fund, Inc. Prospectus

International Equity Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is long-term growth of capital and income.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.66%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.02%
Total Annual Portfolio Operating Expenses	0.68%

Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

1 Year	3 Years	5 Years	10 Years
$69	$218	$379	$847

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in equity securities. The Portfolio will normally hold securities of issuers from at least three different countries (not including the U.S.). The Portfolio’s equity investments may include common stocks, depositary receipts evidencing ownership of common stocks, certain preferred stocks, and securities that carry the right to buy common stocks (e.g., rights and warrants). The Portfolio may purchase securities in any country, including those with developed markets and emerging markets and is not required to allocate its investments in set percentages in particular countries, except that the Portfolio’s investments in emerging markets countries normally will be limited to 30% of its net assets. From time to time, the Portfolio may have significant investments in one or more countries, a geographic region, or in particular sectors. The Portfolio may enter into currency forward contracts in order to hedge direct or indirect foreign currency exposure.

The Portfolio typically invests in well-established companies of medium-to-large capitalization based on standards of the applicable market. The Portfolio typically invests in companies that, in the adviser’s opinion, appear to be temporarily undervalued but have a favorable outlook for long- term growth. The Portfolio’s adviser also focuses on the underlying financial condition and prospects of individual companies, including future earnings, cash flow, and dividends. Various other factors, including financial strength, economic condition, competitive advantage, quality of the business franchise, financially material environmental, social, and governance (“ESG”) issues (for example, the management of environmental risk, employee relations, and shareholder rights), along with the reputation, experience, and competence of a company’s management are weighed against valuation in selecting individual securities. Consideration of ESG factors may not be determinative in the adviser’s investment process and the adviser may conclude that other attributes of an investment outweigh ESG considerations when making investment decisions for the Portfolio. The adviser also considers the economic and political stability of the country where the issuer is located and the protections provided to shareholders.

The adviser may consider selling an equity security when it believes the security is no longer undervalued, due to either its price appreciation or changes in the company’s fundamentals, or when the adviser believes another security provides a more attractive investment opportunity.

PRINCIPAL RISKS

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Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

Northwestern Mutual Series Fund, Inc. Prospectus 60

International Equity Portfolio – Summary

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ADR Risk – ADRs are receipts representing ownership of shares of a foreign issuer held by a U.S. bank or similar financial institution that entitle the holder to dividends and capital gains on the underlying foreign shares. ADRs are alternatives to directly purchasing the underlying foreign securities in their national markets and currencies. They, and other similar depositary receipts, are subject to many of the risks associated with direct investments in foreign securities, such as currency risk, political and economic risk and market risk, because their values depend on the performance of the non-dollar denominated underlying foreign securities. The Portfolio is also subject to fees and the credit risk of the financial institution holding the ADRs or other depositary receipts. ADRs may be “sponsored,” meaning that they are implemented by a financial institution in collaboration with the issuing foreign company, or “unsponsored,” meaning that the financial institution created the instrument without the sponsorship or direct involvement of the foreign company. Differing registration requirements apply to each type of ADR. ADRs may transact on exchanges or on over-the-counter markets (“OTC”). Conducting transactions in OTC markets may result in higher costs, a lack of pricing transparency and lower liquidity when compared with exchange-based transactions. Risks associated with different ADR types will vary, based upon differences in registration, reporting and disclosure requirements that apply to such ADRs and the characteristics of the market in which transactions for the particular ADR are conducted.

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Derivatives Risk – The value of a derivative generally depends upon, or is derived from, an underlying asset, reference rate or index. The Portfolio’s use of derivatives involves risks different from, or possibly greater than, the risks associated with investing directly in securities or other traditional investments. Investments in derivatives may not have the intended effects and may result in losses for the Portfolio that may not otherwise have occurred or missed opportunities for the Portfolio. Certain derivatives involve leverage, which could cause the Portfolio to lose more than the principal amount invested. The derivatives could involve management, credit, interest rate, liquidity and market risks, and the risks of misplacing or improper valuation. Changes in the value of the derivative may not correlate as intended with the underlying asset, rate or index. In addition, the Portfolio could sustain a loss in the event the counterparty to a derivatives transaction fails to make the required payments or otherwise comply with the terms of the contract. The Portfolio’s purchase of forwards contracts may involve risks related to imperfect correlation between the prices of such instruments and the price of the underlying asset, as well as leverage, liquidity and volatility risks. In addition, the purchase of forwards also involves counterparty credit risk as well as heightened market risk.

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Emerging Markets Risk – Investing in emerging market securities increases foreign investing risk, and may subject the Portfolio to more rapid and extreme changes in the value of its holdings compared with investments made in U.S. securities or in foreign, developed countries. Investments in emerging markets may be subject to political, economic, legal, market, and currency risks. Emerging market securities trade in smaller markets which may experience significant price and market volatility, fluctuations in currency values, interest rates and commodity prices, higher transaction costs, and the increased likelihood of the occurrence of trading difficulties, such as delays in executing, clearing and settling Portfolio transactions or in receiving payment of dividends. Special risks associated with investments in emerging market issuers may include a lack of publicly available information, a lack of uniform disclosure, accounting, financial reporting, and recordkeeping standards, and more limited investor protection provisions when compared with developed economies. Emerging market risks also may include unpredictable and changing political, economic and tax policies, the imposition of capital controls and/or foreign investment limitations by a country, nationalization of businesses, and the imposition of sanctions or restrictions in certain investments by other countries, such as the United States. Investments in Chinese securities may be more vulnerable to political and economic risks than investments in securities from other countries. The Chinese government could, at any time, alter or discontinue the economic reform programs implemented since 1978 which liberalized trade policy and reduced government control. Changes in these policies could adversely affect Chinese companies or investments in those companies and could substantially affect the value of China’s currency relative to the U.S. dollar. In addition, any public health threat or similar issue could have a significant impact on the Chinese economy, which in turn could adversely affect the Portfolio’s investments.

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Foreign Currency Risk – The risk that foreign (non-U.S. dollar) currency denominated securities may be adversely affected by decreases in foreign currency values relative to the U.S. dollar. Investments in securities subject to foreign currency risk may have more rapid and extreme changes in value or more losses than investments in U.S. dollar denominated securities.

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61 Northwestern Mutual Series Fund, Inc. Prospectus

International Equity Portfolio – Summary

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Liquidity Risk – Markets for foreign securities, in particular emerging markets securities, may be less liquid than markets for larger cap stocks and domestic securities, and therefore may be difficult to purchase or sell at an advantageous time or price, if at all. These risks may be magnified during periods of economic turmoil or in an extended economic downturn.

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PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio’s investment strategy (Strategy Index). The table also shows the Portfolio’s returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Prior to November 1, 2021, the Portfolio was managed by a different sub-adviser. Performance shown may have been different if the current strategy, and the current sub-adviser, had been in place during the periods shown. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

Northwestern Mutual Series Fund, Inc. Prospectus 62

International Equity Portfolio – Summary

	Quarter/Year	Return
Best Quarter	4th quarter, 2022	15.79%
Worst Quarter	1st quarter, 2020	-24.42%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	International Equity Portfolio	3.94%	2.81%	3.02%
Strategy Index:	MSCI® All Country World (ex- US) Value Index (Net) (reflects no deduction for fees, expenses or taxes)	6.04%	4.50%	4.07%
Broad-Based Index:	MSCI® All Country World (ex- US) Index (Net)1 (reflects no deduction for fees, expenses or taxes)	5.53%	4.10%	4.80%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: Dodge & Cox
Portfolio Managers: The Portfolio is managed by Dodge & Cox’s International Equity Investment Committee (“IEIC”), whose members are jointly and primarily responsible for the management of the Portfolio. The IEIC consists of the following members:
Roger G. Kuo, CFA, President, Director, and Research Analyst, joined Dodge & Cox in 1998 and has been an IEIC member since 2006 and a manager of the Portfolio since November 2021.
Mario C. DiPrisco, CFA, Vice President and Research Analyst, joined Dodge & Cox in 1998 and has been an IEIC member since 2004 and a manager of the Portfolio since November 2021.
Sophie Chen, CFA, Vice President and Research Analyst, joined Dodge & Cox in 2012 and has been an IEIC member since 2024 and a manager of the Portfolio since January 2024.
Englebert T. Bangayan, CFA, Vice President and Research Analyst, joined Dodge & Cox in 2002 and has been an IEIC member since 2015 and a manager of the Portfolio since November 2021.
Raymond J. Mertens, CFA, Senior Vice President and Director, and Research Analyst, joined Dodge & Cox in 2003 and has been an IEIC member since 2018 and a manager of the Portfolio since November 2021.
Paritosh Somani, CFA, Vice President and Research Analyst, joined Dodge & Cox in 2007 and has been an IEIC member since 2021 and a manager of the Portfolio since November 2021.

TAXES AND INTERMEDIARY COMPENSATION

63 Northwestern Mutual Series Fund, Inc. Prospectus

Emerging Markets Equity Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to seek capital appreciation.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	1.03%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.05%
Total Annual Portfolio Operating Expenses	1.08%
Fee Waiver(1)	(0.19)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.89%

(1)

Example

1 Year	3 Years	5 Years	10 Years
$91	$325	$577	$1,300

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

The Portfolio normally invests at least 80% of net assets (plus any borrowings for investment purposes) in equity securities of issuers that are tied economically to emerging market countries. The Portfolio invests primarily in common stocks, but may also invest in other types of equity securities, including but not limited to, preferred stocks and American Depositary Receipts (ADRs) and other depositary receipts for those securities.

Emerging market countries include countries determined by the Portfolio’s adviser to have emerging market economies, taking into account a number of factors, such as the country’s credit rating, its political and economic stability and the development of its financial and capital markets. Emerging market countries include, but are not limited to, all countries that comprise the MSCI Emerging Markets Index. A company is considered to be an emerging market company if the adviser determines that the company meets one or more of the following criteria: the company

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is organized under the laws of, or has its principal office in an emerging market country;

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has its principal securities trading market in an emerging market country; and/or

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derives the majority of its annual revenue or earnings or assets from goods produced, sales made or services performed in an emerging market country.

The Portfolio may also invest in equity securities of issuers that are not tied economically to emerging market countries. Such investments will not exceed 20% of the net assets of the Portfolio. The Portfolio may invest in securities denominated in U.S. Dollars and currencies of emerging market countries in which it is permitted to invest. The Portfolio typically has full currency exposure to those markets in which it invests.

Northwestern Mutual Series Fund, Inc. Prospectus 64

Emerging Markets Equity Portfolio – Summary

The Portfolio may invest in companies of any size. The Portfolio may invest in securities of any market sector and, from time to time, as a result of the adviser’s stock selection process, may hold a significant amount of securities of companies within a single sector. The adviser may invest a large percentage of the Portfolio’s assets in issuers in a single country, a small number of countries, or a particular geographic region. The Portfolio currently anticipates that it will have significant exposure to Mainland China equity and equity-related securities including through the Shanghai-Hong Kong and Shenzhen-Hong Kong Stock Connect program or by any other available means.

In seeking to achieve the Portfolio’s investment objective the adviser invests in quality companies and is an active, engaged owner. The adviser evaluates every company against quality criteria and builds conviction using a team-based approach and peer review process. The quality assessment covers five key factors: 1) the durability of the business model, 2) the attractiveness of the industry, 3) the strength of financials, 4) the capability of management, and 5) the most material environmental, social and governance (“ESG”) factors impacting a company. Examples of ESG factors considered by the adviser include, but are not limited to, carbon emissions, climate risks, labor management, employee safety and corporate governance. The specific factors considered may vary depending on the type of company being evaluated. Consideration of ESG factors may not be determinative in the adviser’s investment process and the adviser may conclude that other attributes of an investment outweigh ESG considerations when making investment decisions for the Portfolio. The adviser seeks to understand what is changing in companies, industries and markets but is not being priced into the market or is being mispriced. Through fundamental research, supported by a global research presence and proprietary tools, the adviser seeks to identify companies whose quality is not yet fully recognized by the market.

PRINCIPAL RISKS

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Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

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ADR Risk – ADRs are receipts representing ownership of shares of a foreign issuer held by a U.S. bank or similar financial institution that entitle the holder to dividends and capital gains on the underlying foreign shares. ADRs are alternatives to directly purchasing the underlying foreign securities in their national markets and currencies. They, and other similar depositary receipts, are subject to many of the risks associated with direct investments in foreign securities, such as currency risk, political and economic risk and market risk, because their values depend on the performance of the non-dollar denominated underlying foreign securities. The Portfolio is also subject to fees and the credit risk of the financial institution holding the ADRs or other depositary receipts. ADRs may be “sponsored,” meaning that they are implemented by a financial institution in collaboration with the issuing foreign company, or “unsponsored,” meaning that the financial institution created the instrument without the sponsorship or direct involvement of the foreign company. Differing registration requirements apply to each type of ADR. ADRs may transact on exchanges or on over-the-counter markets (“OTC”). Conducting transactions in OTC markets may result in higher costs, a lack of pricing transparency and lower liquidity when compared with exchange-based transactions. Risks associated with different ADR types will vary, based upon differences in registration, reporting and disclosure requirements that apply to such ADRs and the characteristics of the market in which transactions for the particular ADR are conducted.

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China Investing Risk – Hong Kong reverted to Chinese sovereignty on July 1, 1997, and investments in Hong Kong are subject to certain risks associated with investments in China. Risks associated with investments in China and Hong Kong include exposure to currency fluctuations, less liquidity, expropriation, confiscatory taxation, nationalization, exchange control regulations (including currency blockage) and differing legal standards. Inflation and rapid fluctuations in inflation and interest rates have had, and may continue to have, negative effects on the economies and securities markets of China or Hong Kong. Military conflicts, either in response to internal social unrest or conflicts with other countries, are an ever present consideration. The adoption or continuation of protectionist trade policies by one or more countries (including the U.S.) could lead to decreased demand for Chinese products and have an adverse effect on the Chinese securities markets. In particular, the current political climate has intensified concerns about heightened trade tensions between China and the U.S., as each country has imposed, and may in the future impose additional, tariffs on the other country’s products. These actions may result in a significant reduction in international trade, the oversupply of certain manufactured goods, substantial price reductions of goods and possible failure of individual companies and/or large segments of China’s export industry, which could have a negative impact on a Portfolio’s performance. The Portfolio may gain exposure to companies based or operated in China by investing through legal structures known as variable interest entities (“VIEs”) which utilize offshore companies established by the Chinese company to facilitate foreign investment. Instead of directly owning the equity securities of a Chinese company, a VIE enters into service and other contracts with the Chinese company. These contractual arrangements are intended to give the offshore company the ability to exercise power over and obtain economic rights from the Chinese company. Among the risks related to owning VIEs is the risk that the Chinese government could intervene with respect to the use of the VIE structure, which could significantly affect the Chinese company’s performance and the terms and ultimate enforceability of the VIE’s contractual arrangement with the Chinese company.

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65 Northwestern Mutual Series Fund, Inc. Prospectus

Emerging Markets Equity Portfolio – Summary

fluctuations in currency values, interest rates and commodity prices, higher transaction costs, and the increased likelihood of the occurrence of trading difficulties, such as delays in executing, clearing and settling Portfolio transactions or in receiving payment of dividends. Special risks associated with investments in emerging market issuers may include a lack of publicly available information, a lack of uniform disclosure, accounting, financial reporting, and recordkeeping standards, and more limited investor protection provisions when compared with developed economies. Emerging market risks also may include unpredictable and changing political, economic and tax policies, the imposition of capital controls and/or foreign investment limitations by a country, nationalization of businesses, and the imposition of sanctions or restrictions in certain investments by other countries, such as the United States.

•

Northwestern Mutual Series Fund, Inc. Prospectus 66

Emerging Markets Equity Portfolio – Summary

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PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio's returns with those of an index that represents the overall securities market (Broad-Based Index). Prior to March 24, 2017, the sub-adviser to the Portfolio was different. Performance shown may have been different if the current strategy, and the current sub-adviser, had been in place during the periods shown. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	4th quarter, 2020	26.43%
Worst Quarter	1st quarter, 2020	-26.40%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Emerging Markets Equity Portfolio	4.02%	0.12%	2.50%
Broad-Based Index:	MSCI® Emerging Markets Index (Net) (reflects no deduction for fees, expenses or taxes)	7.50%	1.70%	3.64%

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: abrdn Investments Limited (“abrdn”)
Portfolio Managers: The Portfolio is managed using a team-based approach, with the following team members being jointly and primarily responsible for the day-to-day management of the Portfolio:
Devan Kaloo, Global Head of Equities and Head of Global Emerging Markets Equities, has managed the Portfolio since 2017.
Nick Robinson, CFA, Senior Investment Director, has managed the Portfolio since February 2023.

TAXES AND INTERMEDIARY COMPENSATION

67 Northwestern Mutual Series Fund, Inc. Prospectus

Government Money Market Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to realize maximum current income to the extent consistent with liquidity and stability of capital.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.30%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.03%
Total Annual Portfolio Operating Expenses	0.33%
Fee Waiver(1)	0.00%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.33%

(1)

Example

1 Year	3 Years	5 Years	10 Years
$34	$106	$185	$418

PRINCIPAL INVESTMENT STRATEGIES

As a government money market portfolio, the Portfolio invests at least 99.5% of its total assets in cash, U.S. Treasury bills, notes and other obligations issued or guaranteed as to principal and interest by the U.S. Government, its agencies or instrumentalities, and repurchase agreements secured by such obligations or cash. The Portfolio may invest 100% of its total assets in such repurchase agreements. Under normal circumstances, the Portfolio will invest at least 80% of net assets in obligations issued or guaranteed as to principal and interest by the U.S. Government, its agencies or instrumentalities, and repurchase agreements secured by such obligations. The Portfolio invests in a portfolio of securities maturing in 397 days or less (with certain exceptions) that will have a dollar-weighted average maturity of 60 days or less and a dollar-weighted average life of 120 days or less. The Portfolio may invest in variable and floating rate instruments, and transact in securities on a when-issued, delayed delivery or forward commitment basis. The Portfolio seeks to maintain a net asset value of $1.00 per share.

PRINCIPAL RISKS

The main risks of investing in this Portfolio are identified below.

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Active Management Risk – The securities selected for the Portfolio may underperform the markets, relevant indices, or securities selected by other funds with similar investment objectives and investment strategies.

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Credit Risk – The Portfolio could lose money if the issuer or guarantor of a fixed income security or the counterparty to a repurchase agreement is unwilling or unable to meet its financial obligations. In addition, changes in an issuer’s credit rating or the market’s perception of an issuer’s creditworthiness may also affect the value of the Portfolio’s investment in that issuer. Changes in credit spreads or improvements in an issuer’s credit quality may increase the risk that an issuer calls outstanding securities prior to their maturity.

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Income Risk – The risk that the Portfolio’s yield will vary as short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates.

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Northwestern Mutual Series Fund, Inc. Prospectus 68

Government Money Market Portfolio – Summary

Additionally, securities issued or guaranteed by the U.S. government, its agencies and instrumentalities have historically involved little risk of loss of principal if held to maturity. However, due to fluctuations in interest rates, the market value of such securities may vary during the period you are invested in the Portfolio. For example, the market value of a fixed income portfolio with an average duration of five years generally would be expected to fall approximately 5% if interest rates rose by one percentage point. Declining interest rates may increase the risk that an issuer calls outstanding securities prior to their maturity.

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Liquidity Risk – Investments for the Portfolio may be difficult to purchase or sell at an advantageous time or price, if at all. These risks may be magnified during periods of economic turmoil or in an extended economic downturn. The liquidity requirements applicable to government money market funds are designed to help mitigate the potential impact of these risks.

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Repurchase Agreements Risk – If the other party to a repurchase agreement defaults on its obligation under the agreement, the Portfolio may suffer delays and incur costs or lose money in exercising its rights under the agreement. These risks may be heightened if the other party is located outside of the U.S. If the seller fails to repurchase the security and the market value of the security declines, the Portfolio may lose money.

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Stable Net Asset Value Risk – The Portfolio may not be able to maintain a stable net asset value (“NAV”) of $1.00 per share at all times. If the Portfolio fails to maintain a stable NAV (or there is a perceived threat of such failure), the Portfolio, along with other money market funds, could be subject to increased redemption activity.

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Treasury Obligations Risk – Direct obligations of the U.S. Treasury have historically involved little risk of loss of principal if held to maturity. However, due to fluctuations in interest rates, the market value of such securities may vary during the period shareholders own shares of the Fund. In addition, notwithstanding that U.S. Treasury obligations are backed by the full faith and credit of the United States, circumstances could arise that could prevent the timely payment of interest of principal, such as reaching the legislative “debt ceiling.” Such non-payment could result in losses to the Fund and substantial negative consequences for the U.S. economy and the global financial system.

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U.S. Government Obligations Risk – Certain securities in which the Fund may invest, including securities issued by certain U.S. Government agencies and U.S. Government sponsored enterprises, are not guaranteed by the U.S. Government or supported by the full faith and credit of the United States. In addition, circumstances could arise that could prevent the timely payment of interest or principal on U.S. Government obligations, such as reaching the legislative “debt ceiling.” Such non- payment could result in losses to the Fund and substantial negative consequences for the U.S. economy and the global financial system.

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Variable and Floating Rate Instrument Risk – Variable and floating rate securities provide for a periodic adjustment in the interest rate paid on the obligations. The absence of an active market for these securities could make it difficult for the Portfolio to dispose of them if the issuer defaults.

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When-Issued and Delayed Delivery Transactions Risk – When issued and delayed delivery securities involve the risk that the security will lose value prior to its delivery. There is also the risk that the security will not be issued or that the other party to the transaction will not meet its obligation. If this occurs, the Portfolio loses both the investment opportunity for the assets it set aside to pay for the security and any gain the security’s price.

You could lose money by investing in the Government Money Market Portfolio.Although the Portfolio seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. An investment in the Portfolio is not a bank account and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The Portfolio’s sponsor has no legal obligation to reimburse the Portfolio for losses and you should not expect that the sponsor will provide financial support to the Portfolio at any time, including during periods of market stress.

PERFORMANCE

69 Northwestern Mutual Series Fund, Inc. Prospectus

Government Money Market Portfolio – Summary

prime money market fund and invested in certain types of securities that the Portfolio is no longer permitted to hold. Consequently, the performance information below may have been different if the current investment limitations had been in effect during the period prior to the Portfolio’s conversion to a government money market fund. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	4th quarter, 2023	1.30%
Worst Quarter	1st quarter, 2022	0.00%

Average Annual Total Return
(for periods ended December 31, 2024)

	1 Yr	5 Yr	10 Yr
Government Money Market Portfolio	4.99%	2.28%	1.56%

For the seven-day period ended March 31, 2025, the Government Money Market Portfolio’s yield was 4.05%.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: BlackRock Advisors, LLC

TAXES AND INTERMEDIARY COMPENSATION

Northwestern Mutual Series Fund, Inc. Prospectus 70

Short-Term Bond Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to provide as high a level of current income as is consistent with prudent investment risk.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.32%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.08%
Total Annual Portfolio Operating Expenses	0.40%

Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

1 Year	3 Years	5 Years	10 Years
$41	$128	$224	$505

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in debt securities. The adviser normally selects investment grade securities which are generally securities rated investment grade by major credit rating agencies (BBB- or higher by S&P; Baa3 or higher by Moody’s; BBB- or higher by Fitch) or, if unrated, determined by the Portfolio’s adviser to be of comparable quality. Also, the Portfolio may invest up to 20% of net assets in foreign securities, including those of issuers located in emerging markets, consistent with its investment objective. Foreign securities held by the Portfolio may consist of both U.S. dollar and non-U.S. dollar denominated securities. Debt securities may be of any maturity, but under normal market conditions, the Portfolio’s effective dollar-weighted average maturity will not exceed three years. The Portfolio primarily invests in corporate, government and mortgage- and asset-backed securities. The Portfolio’s mortgage-related securities investments may include collateralized mortgage obligations as well as commercial and residential mortgage-backed securities. The Portfolio’s investments in asset-backed securities include asset-backed auto loans. The Portfolio may use a variety of derivatives, such as futures, forwards, and swaps for a number of purposes, such as for exposure or hedging. The Portfolio specifically uses interest rate futures, credit default swaps, and credit default index swap indexes (CDX). Interest rate futures are typically used in an effort to manage its exposure to changes in interest rates or to adjust portfolio duration. Credit default swaps are typically used in an effort to protect the value of certain portfolio holdings or to manage the Portfolio’s overall exposure to changes in credit quality. A CDX is a swap on an index of credit default swaps. CDXs allow an investor to manage credit risk or take a position on a basket of credit entities (such as credit default swaps or a reference index) rather than transacting in a single-name credit default swap. Additionally, the Portfolio uses mortgage-backed securities on a delayed delivery or forward commitment basis through the “to-be-announced” (TBA) market as a means of adjusting the Portfolio’s duration and gaining exposure to investment-grade bonds.

The adviser uses both a “top down” and “bottom up” investment approach to construct the portfolio of investments. The top down investment approach involves an evaluation by the adviser of the overall macroeconomic environment and its potential impact on the level and direction of interest rates. The adviser then identifies sectors it believes have the best potential for performance based on its economic outlook. The bottom up investment approach focuses on fundamental research of individual issuers. The adviser integrates environmental, social, and governance (ESG) factors into its investment research process for certain investments. While ESG matters vary widely, the adviser generally considers ESG factors such as climate change, resource depletion, labor standards, diversity, human rights issues, and governance structure and practices. For certain types of investments, including, but not limited to, cash, currency positions, and particular types of derivatives, an ESG analysis may not be relevant or possible due to lack of data. Where ESG considerations are integrated into the investment research process, the adviser focuses on the ESG factors that it considers most likely to have a material impact on the performance of the holdings in the Portfolio. The adviser may conclude that other attributes of an investment outweigh ESG considerations when making investment decisions for the Portfolio.

71 Northwestern Mutual Series Fund, Inc. Prospectus

Short-Term Bond Portfolio – Summary

Investment decisions reflect the adviser’s outlook for interest rates and the economy, as well as the prices, yields, and credit quality of various securities in which the Portfolio may invest.

The adviser may sell a portfolio security for a variety of reasons, such as to adjust the Portfolio’s average maturity, duration, or overall credit quality or to shift assets into and out of higher-yielding or lower-yielding securities or certain sectors.

PRINCIPAL RISKS

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected and the adviser’s quality determinations with respect to securities that are unrated by the major credit rating agencies may be inaccurate, which could cause the Portfolio to underperform other mutual funds or lose money.

•

Credit Risk – The Portfolio could lose money if the issuer or guarantor of a fixed income security is unwilling or unable to meet its financial obligations. In addition, changes in an issuer’s credit rating or the market’s perception of an issuer’s creditworthiness may also affect the value of the Portfolio’s investment in that issuer. Changes in credit spreads or improvements in an issuer’s credit quality may increase the risk that an issuer calls outstanding securities prior to their maturity.

•

Derivatives Risk – The value of a derivative generally depends upon, or is derived from, an underlying asset, reference rate or index. The primary risks associated with the Portfolio’s use of derivatives are the risk that changes in the value of the derivatives may not correlate as intended with the underlying asset, rate or index, the risk of adverse price movements in the market and the risk that the counterparty to a derivatives transaction fails to make the required payment or otherwise comply with the terms of the contract. Certain derivatives involve leverage, which could cause the Portfolio to lose more than the principal amount invested. Other risks include management, interest rate, and liquidity risks, and the risk of missed opportunities in other investments. The Portfolio’s purchase of forwards and futures contracts may involve risks related to imperfect correlation between the prices of such instruments and the price of the underlying asset, as well as leverage, liquidity and volatility risks. In addition, the purchase of forwards also involves counterparty credit risk as well as heightened market risk. The Portfolio’s purchase of swap agreements may pose risk arising from losses if the underlying reference asset does not perform as anticipated; such agreements are also subject to counterparty credit, liquidity and leveraging risks.

•

Northwestern Mutual Series Fund, Inc. Prospectus 72

Short-Term Bond Portfolio – Summary

•

Interest Rate Risk – Prices of fixed income instruments generally rise and fall in response to changes in market interest rates. In a rising interest rate environment, the value of the Portfolio’s fixed income investments is likely to decline. A significant rise in interest rates over a short period of time could cause significant losses in the market value of the Portfolio’s fixed income instruments. A portfolio with a longer average portfolio duration will be more sensitive to changes in interest rates than a portfolio with a shorter average portfolio duration. For example, the market value of a fixed income portfolio with an average duration of five years generally would be expected to fall approximately 5% if interest rates rose by one percentage point. Declining interest rates may increase the risk that an issuer calls outstanding securities prior to their maturity.

•

Liquidity Risk – Fixed income and derivative investments can be difficult to purchase or sell at an advantageous time or price, if at all, during periods of reduced marketability for the investment or due to the size of the transaction. These risks may be magnified during periods of economic turmoil or in an extended economic downturn or when investing in emerging markets.

•

Mortgage- and Asset-Backed Securities Risk – The Portfolio invests in collateralized mortgage obligations, mortgage-backed securities and asset-backed securities. Mortgage-related and other asset-backed securities are subject to interest rate risk, credit risk and liquidity risk as well as additional risks including prepayment and extension risk. Mortgage-related and other asset-backed securities represent interests in pools of mortgages or other assets and often involve risks that are different or possibly more acute than risks associated with other types of debt instruments. The value of some mortgage- or asset-backed securities may be particularly sensitive to changes in prevailing interest rates. Asset-backed securities are subject to risks similar to those associated with mortgage-backed securities, as well as risks associated with the nature and servicing of the assets underlying the securities. Asset-backed auto loans are backed by receivables from motor vehicle installment sales contracts or installment loans secured by motor vehicles and may be subject to heightened credit risk.

•

Prepayment and Extension Risk – Prepayment risk is the risk that principal on a debt obligation will be paid earlier than scheduled or expected, which could reduce yield and market value of the security and shorten the Portfolio’s average effective maturity. The rate of prepayments tends to increase as interest rates fall. Extension risk is the risk that, as interest rates rise, repayments on a debt obligation may occur more slowly than anticipated by the market and the obligation may remain outstanding longer.

•

U.S. Government Securities Risk – Not all obligations of the U.S. government, its agencies and instrumentalities are backed by the full faith and credit of the U.S. Treasury. Some obligations are backed only by the credit of the issuing agency or instrumentality, and in some cases there may be some risk of default by the issuer. Any guarantee by the U.S. government or its agencies or instrumentalities of a security held by the Portfolio does not apply to the market value of such security or to shares of the Portfolio itself.

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio's investment strategy (Strategy Index). The table also shows the Portfolio's returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

73 Northwestern Mutual Series Fund, Inc. Prospectus

Short-Term Bond Portfolio – Summary

	Quarter/Year	Return
Best Quarter	2nd quarter, 2020	4.14%
Worst Quarter	1st quarter, 2022	-2.56%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Short-Term Bond Portfolio	5.04%	1.92%	1.90%
Strategy Index:	Bloomberg® 1-3 Year U.S. Government/Credit Bond Index (reflects no deduction for fees, expenses or taxes)	4.36%	1.58%	1.63%
Broad-Based Index:	Bloomberg® U.S. Aggregate Bond Index1 (reflects no deduction for fees, expenses or taxes)	1.25%	-0.33%	1.35%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: T. Rowe Price Associates, Inc. (TRPA)
Portfolio Manager: Michael F. Reinartz, CFA, Portfolio Manager and Chairman of TRPA’s Short-Term Bond Investment Advisory Committee, joined TRPA in 1996, began managing the Portfolio in 2015 and has co-managed the Portfolio since October 2023.
Steve Kohlenstein, CFA, Portfolio Manager and Chairman of TRPA’s Short-Term Bond Investment Advisory Committee, joined TRPA in 1996, and has co-managed the Portfolio since October 2023.

TAXES AND INTERMEDIARY COMPENSATION

Northwestern Mutual Series Fund, Inc. Prospectus 74

Select Bond Portfolio – Summary

INVESTMENT OBJECTIVE

The primary investment objective of the Portfolio is to provide as high a level of total return as is consistent with prudent investment risk. A secondary objective is to seek preservation of shareholders' capital.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.30%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.01%
Total Annual Portfolio Operating Expenses	0.31%
Fee Waiver(1)	0.00%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.31%

(1)

Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. The Example reflects adjustments made to the Portfolio's operating expenses due to the fee waiver agreement with the investment adviser for the first year only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

1 Year	3 Years	5 Years	10 Years
$32	$100	$174	$393

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in debt securities. The adviser normally selects investment grade securities which are generally securities rated investment grade by major credit rating agencies (BBB- or higher by S&P; Baa3 or higher by Moody’s; BBB- or higher by Fitch) or, if unrated, determined by the Portfolio’s adviser to be of comparable quality. The Portfolio invests primarily in U.S Government obligations, mortgage-backed securities, including commercial mortgage-backed securities, collateralized mortgage obligations, agency mortgage-backed securities, non-agency mortgages, corporate bonds, and asset-backed securities. The Portfolio may invest in certain derivative instruments, including to-be-announced and long settle mortgage-backed securities issued by a Federal agency, subject to the Portfolio’s objective and the Fund’s policies. Mortgage dollar rolls may also be used. The Portfolio may invest in Rule 144A securities. Additionally, the Portfolio may invest up to 20% of net assets in foreign securities, consistent with its investment objectives. Foreign securities held by the Portfolio consist primarily of U.S. dollar denominated securities. Debt securities may be of any maturity or duration, but under normal market conditions, the Portfolio attempts to maintain an overall dollar-weighted average effective duration that is within 10% of the Bloomberg® U.S. Aggregate Index, which had a duration of 6.09 years as of March 31, 2025. Duration is a measure of the sensitivity of the price of the Portfolio’s fixed income securities to changes in interest rates; the longer the duration, the more sensitive the price will be to changes in interest rates. The Portfolio does not target an average effective maturity.

The adviser uses a fundamental, relative value investment approach to construct the portfolio of investments. The adviser invests in debt securities that it believes offer competitive returns and are undervalued, offering additional income and/or price appreciation potential relative to other debt securities of similar credit quality and interest rate sensitivity. The adviser may engage in active and frequent trading of portfolio securities to achieve its investment objectives.

75 Northwestern Mutual Series Fund, Inc. Prospectus

Select Bond Portfolio – Summary

The adviser may sell a portfolio security that has achieved its desired return or if the adviser believes the security or its sector has become overvalued. The adviser may also sell a security if a more attractive opportunity becomes available or if the security is no longer attractive due to its risk profile or as a result of changes in the overall market environment.

PRINCIPAL RISKS

•

High Portfolio Turnover Risk – Active and frequent trading may cause higher brokerage expenses and other transaction costs, which may adversely affect the Portfolio’s performance.

•

Liquidity Risk – Fixed income investments, including Rule 144A securities, may be difficult to purchase or sell at an advantageous time or price, if at all, during periods of reduced marketability for the investment or due to the size of the transaction. These risks may be magnified during periods of economic turmoil or in an extended economic downturn.

•

Mortgage- and Asset-Backed Securities Risk – The risks of investing in mortgage-related and other asset-backed securities, including mortgage dollar rolls, include interest rate risk, credit risk, liquidity risk, prepayment risk and extension risk. Mortgage-related and other asset-backed securities represent interests in pools of mortgages or other assets and often involve risks that are different or possibly more acute than risks associated with other types of debt instruments. The value of some mortgage- or asset-backed securities may be particularly sensitive to changes in prevailing interest rates. To-be-announced mortgage-backed securities increase interest rate risks because the underlying mortgages may be less favorable than anticipated by the Portfolio. Other asset-backed securities are subject to risks similar to those associated with mortgage-backed securities, as

Northwestern Mutual Series Fund, Inc. Prospectus 76

Select Bond Portfolio – Summary

well as risks associated with the nature and servicing of the assets underlying the securities. Asset-backed securities may not have the benefit of a security interest in collateral comparable to that of mortgage assets, resulting in additional credit risk. The use of mortgage dollar rolls involves potential risks of loss that are different from those related to the mortgage securities underlying the transactions, including counterparty risk, market risk, and financial risk (including the risk that the value of the principal and interest payments associated with the mortgage instrument sold to a counterparty exceeds the compensation paid to the Portfolio by the counterparty).

•

PERFORMANCE

	Quarter/Year	Return
Best Quarter	4th quarter, 2023	6.87%
Worst Quarter	1st quarter, 2022	-6.05%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Select Bond Portfolio	1.76%	0.09%	1.57%
Broad-Based Index:	Bloomberg® U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)	1.25%	-0.33%	1.35%

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: Allspring Global Investments, LLC (Allspring)
Portfolio Managers: Maulik Bhansali, CFA, Senior Portfolio Manager and Co-Head of the Core Fixed Income team at Allspring, has served as co-portfolio manager to the Portfolio in his capacity with Allspring since November 2021 and had served as co-portfolio manager to the Portfolio in his capacity with the previous sub-adviser since October 2017.
Jarad Vasquez, Senior Portfolio Manager and Co-Head of the Core Fixed Income team at Allspring, has served as co-portfolio manager to the Portfolio in his capacity with Allspring since November 2021, and had served as co-portfolio manager to the Portfolio in his capacity with the previous sub-adviser since October 2017.

TAXES AND INTERMEDIARY COMPENSATION

77 Northwestern Mutual Series Fund, Inc. Prospectus

Long-Term U.S. Government Bond Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to seek maximum total return, consistent with preservation of capital and prudent investment management.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.55%
Distribution and Service (12b-1) Fees	None
Other Expenses(1)	2.18%
Interest Expense	2.03%
Other Operating Expense	0.15%
Total Annual Portfolio Operating Expenses(1)	2.73%
Expense Reimbursement(2)	(0.05)%
Total Annual Portfolio Operating Expenses After Expense Reimbursement(1),(2)	2.68%

(1)

“Other Expenses” include interest expense of 2.03%. Interest expense is borne by the Portfolio separately from the management fees paid to the Portfolio’s investment adviser, Mason Street Advisors, LLC, and the Portfolio’s sub-adviser, Pacific Investment Management Company LLC. Excluding interest expense, Total Annual Portfolio Operating Expenses are 0.70% and Total Annual Portfolio Operating Expenses After Expense Reimbursement are 0.65%.

(2)

The Portfolio's investment adviser has contractually agreed to reimburse expenses in order to limit Total Annual Operating Expenses After Expense Reimbursement (excluding taxes, brokerage, other investment-related costs, interest and dividend expenses and charges, acquired fund fees and expenses and such non-recurring and extra ordinary expenses as they may arise) to an annual rate of 0.65% of the Portfolio's average net assets. This contractual agreement will continue through at least April 30, 2026 and may not be terminated prior to that date without action by the Board of Directors.

Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. The Example reflects adjustments made to the Portfolio’s operating expenses due to the expense reimbursement agreement with the investment adviser for the first year only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

1 Year	3 Years	5 Years	10 Years
$271	$843	$1,440	$3,057

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in debt securities that are issued or guaranteed by the U.S. Government, its agencies or government sponsored enterprises (“U.S. Government Securities”). Government sponsored enterprises include, for example, the Federal National Mortgage Association (Fannie Mae), the Federal Home Loan Mortgage Corp. (Freddie Mac), the Federal Home Loan Bank (FHLB), the Farm Credit System (FCS) and the Federal Agricultural Mortgage Corp. (Farmer Mac). U.S. Government Securities may be represented by forwards or derivatives such as

Northwestern Mutual Series Fund, Inc. Prospectus 78

Long-Term U.S. Government Bond Portfolio – Summary

options, futures contracts or interest rate swap agreements (to take a position on interest rates moving either up or down) that provide exposure to U.S. Government Securities. Assets not invested in U.S. Government Securities may be invested in other types of investment grade fixed income instruments, such as corporate debt securities of U.S. issuers and mortgage- and asset-backed securities, subject to the quality restrictions described below. Mortgage-related securities may include mortgage pass-through securities, collateralized mortgage obligations, commercial mortgage-backed securities and mortgage dollar rolls. The Portfolio may also invest up to 10% of its net assets in preferred stocks.

The Portfolio will normally have a minimum average portfolio duration of eight years and, for point of reference, the dollar-weighted average maturity of the Portfolio, under normal circumstances, is expected to be more than ten years. Duration is a measure of the sensitivity of the price of the Portfolio’s fixed income securities to changes in interest rates; the longer the duration, the more sensitive the price will be to changes in interest rates.

The Portfolio may invest all of its assets in derivative instruments, such as options, futures contracts or interest rate swap agreements (to take a position on interest rates moving either up or down), or in mortgage- or asset-backed securities, subject to the Portfolio’s objective and the Fund’s policies including the 80% investment policy. The adviser may invest in derivatives at any time it deems appropriate. It will generally do so when it believes that U.S. Government Securities are overvalued relative to derivative instruments or to adjust the overall duration of the Portfolio. The potential leverage created by use of derivatives may cause the Portfolio to be more sensitive to interest rate movements and thus more volatile than other long-term U.S. government bond funds that do not use derivatives.

The Portfolio may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis and may engage in short sales. A short sale involves the sale of a security that is borrowed from a broker or other institution, and which must be purchased in the market at a later date and returned to the lender. The Portfolio may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy backs or dollar rolls).

The “total return” sought by the Portfolio consists of income earned on the Portfolio’s investments, plus capital appreciation, if any, which generally arises from decreases in interest rates or improving credit fundamentals for a particular sector or security. The Portfolio may engage in frequent and active trading of portfolio securities to achieve its investment objective, particularly during periods of volatile market movements.

The Portfolio’s investments in fixed income securities are limited to investment grade U.S. dollar denominated securities of U.S. issuers that are rated at least A by Moody’s or equivalently rated by S&P or Fitch, or, if unrated, determined by the adviser to be of comparable quality. If a downgrade in the rating of a security in which the Portfolio is invested causes it to fall outside these parameters, the adviser will sell the impacted security as soon as reasonably practicable. In addition, with respect to the Portfolio’s investments in fixed income securities that are not U.S. Government Securities, (and subject to the requirement that the Portfolio under normal circumstances maintains at least 80% of net assets (plus any borrowing for investment purposes) in U.S. Government Securities) the Portfolio may only invest up to 10% of its total assets in securities rated A by Moody’s or equivalently rated by S&P or Fitch, or, if unrated, determined by the adviser to be of comparable quality, and may only invest up to 25% of its total assets in securities rated Aa by Moody’s or equivalently rated by S&P or Fitch or, if unrated, determined by the adviser to be of comparable quality.

The Portfolio may sell a position when, in the adviser’s opinion, it no longer represents a good value, when a superior risk/return opportunity exists in a substitute position, or when it no longer fits within the Portfolio’s macroeconomic or structural strategy.

PRINCIPAL RISKS

•

Counterparty Risk – The Portfolio may sustain a loss in the event the other party(s) in an agreement or a participant to a transaction, such as a broker or swap counterparty, defaults on a contract or fails to perform by failing to pay amounts due, failing to fulfill delivery conditions, or failing to otherwise comply with the terms of the contract. Counterparty risk is inherent in many transactions, including derivatives transactions.

•

Credit Risk – The Portfolio could lose money if the issuer or guarantor of a fixed income security or the counterparty to a derivatives contract is unwilling or unable to meet its financial obligations. In addition, changes in an issuer’s credit rating or the market’s perception of an issuer’s creditworthiness may also affect the value of the Portfolio’s investment in that issuer. Changes in credit spreads or improvements in an issuer’s credit quality may increase the risk that an issuer calls outstanding securities prior to their maturity.

•

79 Northwestern Mutual Series Fund, Inc. Prospectus

Long-Term U.S. Government Bond Portfolio – Summary

directly in securities or other traditional investments. Investments in derivatives may not have the intended effects and may result in losses for the Portfolio that may not otherwise have occurred or missed opportunities for the Portfolio. Certain derivatives involve leverage, which could cause the Portfolio to lose more than the principal amount invested. The derivatives could involve management, credit, interest rate, liquidity and market risks, and the risks of misplacing or improper valuation. Changes in the value of the derivative may not correlate as intended with the underlying asset, rate or index. In addition, the Portfolio could sustain a loss in the event the counterparty to a derivatives transaction fails to make the required payments or otherwise comply with the terms of the contract. The Portfolio’s purchase of forwards and futures contracts may involve risks related to imperfect correlation between the prices of such instruments and the price of the underlying asset, as well as leverage, liquidity and volatility risks. In addition, the purchase of forwards also involves counterparty credit risk as well as heightened market risk. The Portfolio’s purchase of swap agreements may pose risk arising from losses if the underlying reference asset does not perform as anticipated; such agreements are also subject to counterparty credit, liquidity and leveraging risks. The Portfolio’s use of options involve risk related to the direction and timing of market movements in the price of the underlying asset, obligations related to exercise of the option, and potential loss in value of the initial investment.

•

High Portfolio Turnover Risk – Active and frequent trading may cause higher brokerage expenses and other transaction costs, which may adversely affect the Portfolio’s performance.

•

Inflation Risk – Your investment in the Portfolio may not provide enough income to keep pace with inflation.

•

Interest Rate Risk – Prices of fixed income instruments generally rise and fall in response to changes in market interest rates. In a rising interest rate environment, the value of the Portfolio’s fixed income investments is likely to decline. A significant rise in interest rates over a short period of time could cause significant losses in the market value of the Portfolio’s fixed income instruments. A Portfolio with a longer average portfolio duration will be more sensitive to changes in interest rates than a portfolio with a shorter average portfolio duration. For example, the market value of a fixed income portfolio with an average duration of five years generally would be expected to fall approximately 5% if interest rates rose by one percentage point. Declining interest rates may increase the risk that an issuer calls outstanding securities prior to their maturity.

•

Issuer Risk – The risk that the value of a security may decline for a reason directly related to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods or services.

•

Leverage Risk – Certain transactions, such as when issued, delayed delivery or forward commitments transactions, or the use of derivative transactions, may give rise to leverage, causing more volatility than if the Portfolio had not been leveraged.

•

Mortgage- and Asset-Backed Securities Risk – The risks of investing in mortgage-related and other asset-backed securities, including interest rate risk, credit risk, liquidity risk, prepayment risk and extension risk. Mortgage-related and other asset-backed securities represent interests in pools of mortgages or other assets and often involve risks that are different or possibly more acute than risks associated with other types of debt instruments. The value of some mortgage- or asset-backed securities may be particularly sensitive to changes in prevailing interest rates. The use of mortgage dollar rolls involves potential risks of loss that are different from those related to the mortgage securities underlying the transactions, including counterparty risk, market risk, and financial risk (including the risk that the value of the principal and interest payments associated with the mortgage instrument sold to a counterparty exceeds the compensation paid to the Portfolio by the counterparty).

•

Northwestern Mutual Series Fund, Inc. Prospectus 80

Long-Term U.S. Government Bond Portfolio – Summary

•

Short Sale Risk – The risk of entering into short sales, including the potential loss of more money than the actual cost of the investment, and the risk that the third party to the short sale may fail to honor its contract terms, causing a loss to the Portfolio.

•

When Issued, Delayed Delivery and Forward Commitment Risk – When issued, delayed delivery purchases and forward commitment transactions involve a risk of loss if the value of the securities declines prior to the settlement date. This risk is in addition to the risk that the Portfolio’s other assets will decline in value. Therefore, these transactions may result in a form of leverage and increase the Portfolio’s overall investment expense.

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio's investment strategy (Strategy Index). The table also shows the Portfolio's returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	1st quarter, 2020	20.64%
Worst Quarter	1st quarter, 2021	-13.26%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Long-Term U.S. Government Bond Portfolio	-5.78%	-5.29%	-0.93%
Strategy Index:	Bloomberg® Long-Term Treasury Index	-6.41%	-5.20%	-0.64%
Broad-Based Index:	Bloomberg® U.S. Aggregate Bond Index1 (reflects no deduction for fees, expenses or taxes)	1.25%	-0.33%	1.35%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: Pacific Investment Management Company LLC (PIMCO)
Portfolio Managers: Stephen Rodosky, joined PIMCO in 2001 and is a Managing Director in PIMCO’s Newport Beach office. He has managed the Portfolio since 2007.
Michael Cudzil, joined PIMCO in 2012 and is a Managing Director in PIMCO’s Newport Beach office. He has managed the Portfolio since February 2016.

81 Northwestern Mutual Series Fund, Inc. Prospectus

Long-Term U.S. Government Bond Portfolio – Summary

TAXES AND INTERMEDIARY COMPENSATION

Northwestern Mutual Series Fund, Inc. Prospectus 82

Inflation Managed Portfolio (formerly Inflation Protection Portfolio) – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to pursue total return using a strategy that seeks to protect against U.S. inflation.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.53%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.06%
Total Annual Portfolio Operating Expenses	0.59%
Fee Waiver(1)	(0.14)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1)	0.45%

(1)

Example

1 Year	3 Years	5 Years	10 Years
$46	$175	$315	$725

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

The Portfolio invests substantially all of its assets in investment-grade debt securities. To help protect against U.S. inflation (as measured by the change in the Consumer Price Index over time), under normal conditions, the Portfolio will invest over 50% of its net assets (plus any borrowings for investment purposes) in inflation-indexed debt securities. These securities include inflation-indexed U.S. Treasury Securities, inflation-indexed securities issued by U.S. government agencies and instrumentalities other than the U.S. Treasury, and inflation-indexed securities issued by domestic and foreign corporations and governments, and may include those located in emerging markets. Inflation-indexed securities are designed to protect the future purchasing power of the money invested in them. The Portfolio also may invest in fixed income securities that are not inflation-indexed. Such investments may include other investment grade debt securities, including collateralized mortgage obligations, mortgage-backed securities, including commercial mortgage-backed securities and agency mortgage-backed securities, and asset-backed securities, including collateralized loan obligations, whether issued by the U.S. government, its agencies or instrumentalities, corporations or other non-governmental issuers, or foreign governments. Investment grade securities are generally securities rated investment grade by major credit rating agencies (BBB- or higher by S&P; Baa3 or higher by Moody’s; BBB- or higher by Fitch) or, if unrated, determined by the Portfolio’s adviser to be of comparable quality.

Due to Internal Revenue Code provisions and regulations governing insurance product funds, no more than 55% of the Portfolio’s assets may be invested in securities issued by the same entity. Because the number of inflation-indexed debt securities issued by entities is limited, at times the Portfolio may have a substantial position in non-inflation-indexed securities. To seek to reduce the impact of this limitation, the adviser may purchase (long) inflation swap agreements to manage or reduce the risk of the effects of inflation with respect to the Portfolio’s position in non-inflation-indexed securities.

83 Northwestern Mutual Series Fund, Inc. Prospectus

Inflation Managed Portfolio (formerly Inflation Protection Portfolio) – Summary

The adviser is not limited to a specific weighted average maturity or duration range. However, the adviser monitors the Portfolio’s weighted average maturity and duration and seeks to adjust it as appropriate, taking into account market conditions, the current inflation rate and other relevant factors.

The Portfolio may invest up to 20% of its total assets in securities denominated in foreign currencies and may invest beyond this limit in U.S. dollar denominated securities of foreign issuers. The Portfolio may hedge some or all of its foreign currency by utilizing forward foreign currency exchange contracts to seek to reduce the risk of loss due to fluctuations in the currency exchange rates. The Portfolio may also use interest rate futures to adjust overall interest rate exposure when the adviser deems it to be advantageous.

The Portfolio may sell a security for a variety of reasons, including its assessment of the security’s relative attractiveness in light of its evaluation of current economic conditions or the risk of inflation, or to manage the Portfolio’s maturity and credit quality standards.

PRINCIPAL RISKS

•

Debt Obligations of Foreign Governments Risk – The issuer of the foreign debt or the governmental authorities that control the repayment of such debt may be unable or unwilling to repay principal or interest when due, and the Portfolio may have limited recourse in the event of a default. The market prices of debt obligations of governments and their agencies, and the Portfolio’s net asset value, may be more volatile than prices of U.S. debt obligations. In addition, unlike debt instruments issued by the U.S. Treasury, inflation-linked bonds issued by corporations or foreign governments do not generally provide principal protection, and in a deflationary environment, such bonds may result in the loss of principal.

•

Derivatives Risk – The value of a derivative generally depends upon, or is derived from, an underlying asset, reference rate or index. The primary risks associated with the Portfolio’s use of derivatives are the risk that the counterparty to a derivatives transaction fails to make the required payment or otherwise comply with the terms of the contract, the risk that changes in the value of the derivatives may not correlate as intended with the underlying asset, rate or index, and the risk of adverse price movements in the market. Certain derivatives involve leverage, which could cause the Portfolio to lose more than the principal amount invested. Other risks include management, interest rate, liquidity risks and the risk of missed opportunities in other investments. The Portfolio's purchase of swap agreements may pose risk arising from losses if the underlying reference asset does not perform as anticipated; such agreements are also subject to counterparty credit, liquidity and leveraging risks.

•

Northwestern Mutual Series Fund, Inc. Prospectus 84

Inflation Managed Portfolio (formerly Inflation Protection Portfolio) – Summary

•

Forward Foreign Currency Exchange Contracts Risk – Forward foreign currency exchange contracts are OTC contracts to purchase or sell a specified amount of a specified currency at a price and future date set at the time of the contract. Forward foreign currency exchange contracts do not eliminate fluctuations in the value of non-U.S. securities but rather allow the Fund to establish a fixed rate of exchange for a future point in time. This strategy can have the effect of reducing returns and minimizing opportunities for gain. Engaging in forward foreign currency exchange contracts will subject the Fund to counterparty credit risk and any failure to perform by a counterparty could result in a loss to the Fund.

•

Inflation Risk – Your investment in the Portfolio may not provide enough income to keep pace with inflation. To the extent that the Portfolio holds investments in non-inflation-linked debt securities, as noted above, that portion of the Portfolio will not be automatically protected from inflation.

•

Interest Rate Risk – Prices of fixed income instruments, including inflation-indexed debt securities, generally rise and fall in response to changes in market interest rates. In a rising interest rate environment, the value of the Portfolio’s fixed income investments is likely to decline. A significant rise in interest rates over a short period of time could cause significant losses in the market value of the Portfolio’s fixed income instruments. A portfolio with a longer average portfolio duration will be more
sensitive to changes in interest rates than a portfolio with a shorter average portfolio duration. For example, the market value of a fixed income portfolio with an average duration of five years generally would be expected to fall approximately 5% if interest rates rose by one percentage point. Declining interest rates may increase the risk that an issuer calls outstanding securities prior to their maturity.

•

Mortgage- and Asset-Backed Securities Risk – The Portfolio invests in collateralized mortgage obligations, mortgage-backed securities, including commercial mortgage-backed securities, collateralized loan obligations, and asset-backed securities. Mortgage-related and other asset-backed securities are subject to interest rate risk, credit risk and liquidity risk as well as additional risks including prepayment and extension risk. Mortgage-related and other asset-backed securities represent interests in pools of mortgages or other assets and often involve risks that are different or possibly more acute than risks associated with other types of debt instruments. The value of some mortgage- or asset-backed securities may be particularly sensitive to changes in prevailing interest rates. Mortgage-backed securities offered by non-governmental issuers are subject to specific risks, such as the failure of private insurers to meet their obligations and unexpectedly high rates of default on the mortgages backing the securities. Other asset-backed securities are subject to risks similar to those associated with mortgage-backed securities, as well as risks associated with the nature and servicing of the assets underlying the securities. Asset-backed securities may not have the benefit of a security interest in collateral comparable to that of mortgage assets, resulting in additional credit risk.

•

85 Northwestern Mutual Series Fund, Inc. Prospectus

Inflation Managed Portfolio (formerly Inflation Protection Portfolio) – Summary

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio's investment strategy (Strategy Index). The table also shows the Portfolio's returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	2nd quarter, 2020	6.08%
Worst Quarter	2nd quarter, 2022	-6.94%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Inflation Managed Portfolio	1.96%	1.50%	1.95%
Strategy Index:	Bloomberg® U.S. Treasury Inflation Protected Securities (TIPS) Index (reflects no deduction for fees, expenses or taxes)	1.84%	1.87%	2.24%
Broad-Based Index:	Bloomberg® U.S. Aggregate Bond Index1 (reflects no deduction for fees, expenses or taxes)	1.25%	-0.33%	1.35%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: American Century Investment Management, Inc. (American Century)
Portfolio Managers: James E. Platz, CFA, Vice President and Portfolio Manager, has served American Century as a portfolio manager since 2003 and has managed the Portfolio since 2008.
Robert V. Gahagan, Senior Vice President and Senior Portfolio Manager, has served American Century as a portfolio manager since 1991 and has managed the Portfolio since 2007.
Miguel Castillo, Vice President and Portfolio Manager, has served American Century as a portfolio manager since 2014 and has managed the Portfolio since 2015.
Stephen Bartolini, CFA, Vice President and Portfolio Manager, has served American Century as a portfolio manager since 2024 and has managed the Portfolio since September 2024.

TAXES AND INTERMEDIARY COMPENSATION

Northwestern Mutual Series Fund, Inc. Prospectus 86

High Yield Bond Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to achieve high current income and capital appreciation.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.42%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.04%
Total Annual Portfolio Operating Expenses	0.46%

Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

1 Year	3 Years	5 Years	10 Years
$47	$148	$258	$579

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in non-investment grade debt securities. Non-investment grade securities are generally securities rated below investment grade by major credit rating agencies (BB+ or lower by S&P; Ba1 or lower by Moody’s; BB+ or lower by Fitch), or, if unrated, determined by the Portfolio’s adviser to be of comparable quality. There is no minimal acceptable rating for a security to be purchased or held by the Portfolio. The Portfolio may invest up to 30% of net assets in non-investment grade foreign securities, including those of issuers located in emerging markets, consistent with its investment objective. Foreign securities held by the Portfolio consist primarily of U.S. dollar denominated securities but may also include non-U.S. dollar denominated securities.

The securities in which the Portfolio primarily invests are considered speculative and are sometimes known as “junk bonds.” These securities tend to offer higher yields than higher rated securities of comparable maturities primarily because of the market’s greater uncertainty about the issuer’s ability to make all required interest and principal payments, and therefore about the returns that will in fact be realized by the Portfolio.

The adviser selects securities that it believes have attractive investment characteristics and seeks to minimize default risk and other risks through careful security selection and diversification. The adviser’s securities selection process consists of a credit-intensive, fundamental analysis of the issuer. The adviser’s analysis focuses on the issuer’s financial condition, business and product strength, competitive position and management expertise. Further, the adviser considers current economic, financial market and industry factors, which may affect the issuer. The adviser does not limit the Portfolio’s investments to securities of a particular maturity range and does not target an average effective maturity or duration.

In addition, as part of its security selection process, among other factors, the adviser also evaluates whether environmental, social and governance factors could have positive or negative impact on the risk profiles of many issuers in the universe of securities in which the Portfolio may invest. Examples of ESG factors that may be considered include, but are not limited to, carbon emissions, waste and harmful substance management, product and employee safety, human capital management and labor relations, and corporate governance structure and oversight. Specific factors and the weight given to those factors will vary relative to the material impact it may have on the risk assessment of the issuer. The adviser may also consider information derived from active engagement conducted by its in-house stewardship team with certain issuers or guarantors. This qualitative analysis does not automatically result in including or excluding specific securities but may be used by the adviser as an additional input to Portfolio risk/return characteristics. Consideration of ESG factors may not be determinative in the adviser’s investment process and the adviser may conclude that other attributes of an investment outweigh ESG considerations when making investment decisions for the Portfolio.

87 Northwestern Mutual Series Fund, Inc. Prospectus

High Yield Bond Portfolio – Summary

The adviser strives to adhere to a strong sell discipline and generally effects a sale if it believes a security’s future total return has become less attractive relative to other securities, the company begins to perform poorly, the industry outlook changes, or any other event occurs that changes the adviser’s conclusion.

PRINCIPAL RISKS

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected and the adviser's quality determinations with respect to securities that are unrated by the major credit rating agencies may be inaccurate, which could cause the Portfolio to underperform other mutual funds or lose money.

•

Foreign Investing Risk – Investing in foreign securities may subject the Portfolio to more rapid and extreme changes in value or more losses than a fund that invests exclusively in U.S. securities. This risk is due to potentially smaller markets, differing reporting, accounting and auditing standards, and nationalization, expropriation or confiscatory taxation, currency blockage, political and economic conditions, or diplomatic developments. Foreign securities may be adversely affected by decreases in foreign currency values relative to the U.S. dollar, or in the case of hedged positions, that the U.S. dollar will decline in value relative to the currency being hedged, and may be less liquid, more volatile, and harder to value than U.S. securities. The Portfolio’s investments in emerging markets heighten these risks due to a lack of established legal, political, business and social frameworks to support securities markets.

•

High Yield Debt Risk – High yield debt securities (so called “junk bonds”) in which the Portfolio invests have greater interest rate and credit risk, may be more difficult to sell or sell at a reasonable price, have greater risk of loss than higher rated securities, and are predominantly speculative with respect to an issuer’s ability to pay interest and repay principal. In addition, high yield debt securities may be particularly sensitive to changes in the securities markets.

•

Inflation Risk – Your investment in the Portfolio may not provide enough income to keep pace with inflation.

•

Interest Rate Risk – Prices of fixed income instruments generally rise and fall in response to changes in market interest rates. In a rising interest rate environment, the value of the Portfolio’s fixed income investments is likely to decline. A significant rise in interest rates over a short period of time could cause significant losses in the market value of the Portfolio’s fixed income instruments. Duration measures the price sensitivity of a fixed income instrument to changes in interest rates. A portfolio with a longer average portfolio duration will be more sensitive to changes in interest rates than a portfolio with a shorter average portfolio duration. For example, the market value of a fixed income portfolio with an average duration of five years generally would be expected to fall approximately 5% if interest rates rose by one percentage point. Declining interest rates may increase the risk that an issuer calls outstanding securities prior to their maturity.

•

Liquidity Risk – High yield debt securities may be difficult to purchase or sell at an advantageous time or price, if at all. These risks may be magnified during periods of economic turmoil or in an extended economic downturn or when investing in emerging markets.

Northwestern Mutual Series Fund, Inc. Prospectus 88

High Yield Bond Portfolio – Summary

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio's investment strategy (Strategy Index). The table also shows the Portfolio's returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	2nd quarter, 2020	10.08%
Worst Quarter	1st quarter, 2020	-12.32%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	High Yield Bond Portfolio	6.38%	3.71%	4.95%
Strategy Index:	Bloomberg® U.S. Corporate High Yield 2% Issuer Capped Index (reflects no deduction for fees, expenses or taxes)	8.19%	4.20%	5.16%
Broad-Based Index:	Bloomberg® U.S. Aggregate Bond Index1 (reflects no deduction for fees, expenses or taxes)	1.25%	-0.33%	1.35%

1 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: Federated Investment Management Company (Federated)
Portfolio Manager: Mark E. Durbiano, CFA, Senior Portfolio Manager and Senior Vice President of Federated, has been with Federated since 1982 and has managed the Portfolio since 2014.
Kathryn Glass, CFA, Portfolio Manager and Vice President of Federated, has been with Federated since 1999 and has managed the Portfolio since May 2024.
Thomas Scherr, CFA, Portfolio Manager and Vice President of Federated, has been with Federated since 2006 and has managed the Portfolio since May 2024.
Randal Stuckwish, CFA, Portfolio Manager and Vice President of Federated, has been with Federated since 2013 and has managed the Portfolio since May 2024.

TAXES AND INTERMEDIARY COMPENSATION

89 Northwestern Mutual Series Fund, Inc. Prospectus

Multi-Sector Bond Portfolio – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to seek maximum total return, consistent with prudent investment management.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee	0.77%
Distribution and Service (12b-1) Fees	None
Other Expenses(1)	0.09%
Interest Expense	0.04%
Other Operating Expense	0.05%
Total Annual Portfolio Operating Expenses	0.86%
Fee Waiver(2)	(0.11)%
Total Annual Portfolio Operating Expenses After Fee Waiver(2)	0.75%

(1)

“Other Expenses” include interest expense of 0.04%. Interest expense is borne by the Portfolio separately from the management fees paid to the Portfolio’s investment adviser, Mason Street Advisors, LLC, and the Portfolio’s sub-adviser, Pacific Investment Management Company LLC. Excluding interest expense, Total Annual Portfolio Operating Expenses are 0.82% and Total Annual Portfolio Operating Expenses After Expense Reimbursement are 0.71%.

(2)

Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. The Example reflects adjustments made to the Portfolio's operating expenses due to the fee waiver agreement with the investment adviser for the first year only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

1 Year	3 Years	5 Years	10 Years
$77	$263	$466	$1,051

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Normally, the Portfolio invests at least 80% of net assets (plus any borrowings for investment purposes) in debt securities. The debt securities may be represented by forwards or derivatives such as options, futures contracts or swap agreements, including the purchase or sale of credit default swaps, and interest rate swaps (to take a position on interest rates moving either up or down) that have economic characteristics that are similar to the debt securities included in the 80% policy. The average portfolio duration of the Portfolio normally varies from three to eight years, based on the adviser’s forecast for interest rates. Duration is a measure of the sensitivity of the price of the Portfolio’s fixed income securities to changes in interest rates; the longer the duration, the more sensitive the price will be to changes in interest rates.

The Portfolio may invest all of its assets in high yield securities subject to a maximum of 10% of its total assets in securities rated below B by Moody’s or equivalently rated by S&P or Fitch or, if unrated, determined by the Portfolio’s adviser to be of comparable quality. High yield securities, commonly referred to as “junk” bonds, are non-investment grade securities. A security is considered to be non-investment grade when it is rated below investment grade by at least two of the three credit ratings agencies (BB+ or lower by S&P; Ba1 or lower by Moody’s; BB+ or lower by Fitch) or if unrated, determined by the Portfolio’s adviser to be of comparable

Northwestern Mutual Series Fund, Inc. Prospectus 90

Multi-Sector Bond Portfolio – Summary

quality. The Portfolio may invest, without limitation, in securities denominated in foreign currencies and U.S. dollar denominated securities of foreign issuers. In addition, the Portfolio may invest without limit in fixed income securities of issuers that are economically tied to emerging securities markets. The Portfolio may invest in illiquid securities. The Portfolio may also invest up to 10% of its net assets in preferred stocks.

The Portfolio may invest all of its assets in derivative instruments, such as options, futures contracts or swap agreements including the purchase or sale of credit defaults swaps, and interest rate swaps (to take a position on interest rates moving either up or down), in municipal bonds, contingent convertible securities, or in mortgage- or asset-backed securities, subject to the Portfolio’s objective and policies. The Portfolio may utilize currency forwards and currency options to manage or hedge currency exposure. The Portfolio may invest in mortgage- or asset-backed securities which are non-investment grade. Mortgage-backed securities may include residential and commercial mortgage-backed securities issued by a Federal agency and private label residential and commercial mortgage-backed securities. The adviser may invest in derivatives at any time it deems appropriate, generally when relative value and liquidity conditions make these investments more attractive relative to cash bonds.

The “total return” sought by the Portfolio consists of income earned on the Portfolio’s investments, plus capital appreciation, if any, which generally arises from a decrease in interest rates or improving credit fundamentals for a particular sector or security. The Portfolio may engage in frequent and active trading of portfolio securities to achieve its investment objective, particularly during periods of volatile market movements.

In selecting securities for a Portfolio, the adviser develops an outlook for interest rates, foreign currency exchange rates and the economy, analyzes credit and call risks, which involves both macro and fundamental analysis. The proportion of a Portfolio’s assets committed to investment in securities with particular characteristics (such as quality, sector, interest rate or maturity) varies based on the adviser’s outlook for the U.S. and foreign economies, the financial markets and other factors.

The adviser attempts to identify areas of the bond market that are undervalued relative to the rest of the market. The adviser identifies these areas by grouping bonds into the following sectors: money markets, governments, corporates, mortgages, asset-backed and international. Sophisticated proprietary software then assists in evaluating sectors and pricing specific securities. Once investment opportunities are identified, the adviser will shift assets among sectors depending upon changes in relative valuations and credit spreads.

PRINCIPAL RISKS

•

Contingent Convertible Securities Risk – Investing in convertible contingent securities may subject the Portfolio to the risk of the occurrence of a triggering event which, depending on the underlying circumstances, may result in the issuer converting the security to an equity interest or writing down the principal value of such securities (either partially or in full). In addition, coupons associated with contingent convertible securities are typically fully discretionary, and coupon payments can be deferred or cancelled by the issuer without causing an event of default.

•

91 Northwestern Mutual Series Fund, Inc. Prospectus

Multi-Sector Bond Portfolio – Summary

•

Derivatives Risk – The value of a derivative generally depends upon, or is derived from, an underlying asset, reference rate or index. The Portfolio’s use of derivatives involves risks different from, or possibly greater than, the risks associated with investing directly in securities or other traditional investments. Investments in derivatives may not have the intended effects and may result in losses for the Portfolio that may not otherwise have occurred or missed opportunities for the Portfolio. Certain derivatives involve leverage, which could cause the Portfolio to lose more than the principal amount invested. The derivatives could involve management, credit, interest rate, liquidity and market risks, and the risks of misplacing or improper valuation. Changes in the value of the derivative may not correlate as intended with the underlying asset, rate or index. In addition, the Portfolio could sustain a loss in the event the counterparty to a derivatives transaction fails to make the required payments or otherwise comply with the terms of the contract. The Portfolio’s purchase of forwards and futures contracts may involve risks related to imperfect correlation between the prices of such instruments and the price of the underlying asset, as well as leverage, liquidity and volatility risks. In addition, the purchase of forwards also involves counterparty credit risk as well as heightened market risk. The Portfolio’s purchase of total return equity swap agreements may pose risk arising from losses if the underlying reference asset does not perform as anticipated; such agreements are also subject to counterparty credit, liquidity and leveraging risks. The Portfolio’s use of options involve risk related to the direction and timing of market movements in the price of the underlying asset, obligations related to exercise of the option, and potential loss in value of the initial investment.

•

Foreign Currency Risk – The risk that foreign (non-U.S. dollar) currency denominated securities, or derivatives that provide exposure to foreign currencies, may be adversely affected by decreases in foreign currency values relative to the U.S. dollar, or, in the case of hedged positions, that the U.S. dollar will decline in value relative to the currency being hedged. Investments in securities subject to foreign currency risk may have more rapid and extreme changes in value or more losses than investments in U.S. dollar denominated securities.

•

Foreign Investing Risk – Investing in foreign securities may subject the Portfolio to more rapid and extreme changes in value or more losses than a fund that invests exclusively in U.S. securities. This risk is due to potentially smaller markets, differing reporting, accounting and auditing standards, and nationalization, expropriation or confiscatory taxation, currency blockage, political and economic conditions, or diplomatic developments. Investments in emerging markets impose risks different from, and greater than, investments in developed markets. Foreign securities may be less liquid, more volatile, and harder to value than U.S. securities. The Portfolio's investments in emerging markets heighten these risks due to a lack of established legal, political, business and social frameworks to support securities markets.

•

High Portfolio Turnover Risk – Active and frequent trading may cause higher brokerage expenses and other transaction costs, which may adversely affect the Portfolio’s performance.

•

Inflation Risk – Your investment in the Portfolio may not provide enough income to keep pace with inflation.

Northwestern Mutual Series Fund, Inc. Prospectus 92

Multi-Sector Bond Portfolio – Summary

•

Loan Risk – The risks associated with investing in fixed- and floating-rate loans, including senior loans, through loan participations and assignments or otherwise, can include credit risk, interest rate risk, liquidity risk, call risk, settlement risk, and risks associated with being a lender. With respect to senior loans, there may also be heightened credit risk to the extent such loans are below investment grade and made to less creditworthy companies. Senior loans that are considered to be “covenant-lite” offer less protection to the loan holder and may have increased credit risk and call risk.

•

Mortgage- and Asset-Backed Securities Risk – The risks of investing in mortgage-related and other asset-backed securities, including interest rate risk, credit risk, liquidity risk, prepayment risk and extension risk. Privately-issued mortgage-backed securities carry a heightened risk of nonpayment because there are no direct or indirect government or agency guarantees of payments. The use of mortgage dollar rolls involves potential risks of loss that are different from those related to the mortgage securities underlying the transactions, including counterparty risk, market risk, and financial risk (including the risk that the value of the principal and interest payments associated with the mortgage instrument sold to a counterparty exceeds the compensation paid to the Portfolio by the counterparty). Asset-backed securities are subject to risks similar to those associated with mortgage-backed securities, as well as risks associated with the nature and servicing of the assets underlying the securities. Asset-backed securities may not have the benefit of a security interest in collateral comparable to that of mortgage assets, resulting in additional credit risk. Investments in mortgage-related and other asset-backed securities that are non-investment grade may have heightened liquidity risk.

•

Municipal Securities Risk – The value of municipal securities in which the Portfolio invests may be more sensitive to certain adverse conditions than other fixed income securities and the yields of municipal securities may move differently and adversely compared to the yields of the overall debt securities markets. Certain municipal securities may be or become highly illiquid. Illiquidity may be exacerbated from time to time by market or economic events. Municipal securities may lose their tax-exempt status if certain legal requirements are not met, or if federal or state tax laws change. The Portfolio’s investments in certain municipal securities with principal and interest payments that are made from the revenues of a specific project or facility, and not general tax revenues, may have increased risks.

•

93 Northwestern Mutual Series Fund, Inc. Prospectus

Multi-Sector Bond Portfolio – Summary

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of an index that closely aligns with the Portfolio’s investment strategy (Strategy Index). The table also shows the Portfolio’s returns against an index that represents the overall securities market (Broad-Based Index), which the Portfolio has added to comply with new regulatory requirements. Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	2nd quarter, 2020	10.18%
Worst Quarter	1st quarter, 2020	-10.35%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Multi-Sector Bond Portfolio	6.42%	0.93%	3.33%
Strategy Index:	1/3 each: Bloomberg® Global Aggregate — Credit Component ex Emerging Markets, Hedged USD; ICE BofA® Global High Yield BB-B Rated Constrained Developed Markets Index, Hedged USD; JP Morgan® EMBI Global (reflects no deduction for fees, expenses or taxes)	5.65%	1.69%	3.58%
Strategy Index:	Bloomberg® Global Credit Hedged USD Index1 (reflects no deduction for fees, expenses or taxes)	4.47%	1.08%	2.90%
Broad-Based Index:	Bloomberg® Global Aggregate Index2 (reflects no deduction for fees, expenses or taxes)	-1.69%	-1.96%	0.15%

1 The Portfolio’s Strategy Index was changed from the Bloomberg Global Credit Hedged USD Index to the Blended Index because it was determined to provide a more useful comparison based on the Fund’s investment strategy.

2 The Portfolio has added this broad-based index in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC
Sub-Adviser: Pacific Investment Management Company LLC (PIMCO)
Portfolio Managers: Sonali Pier, Managing Director of PIMCO, joined PIMCO in 2013 and has managed the Portfolio since May 2018.
Daniel J. Ivascyn, Group Chief Investment Officer and Managing Director of PIMCO, joined PIMCO in 1998 and has managed the Portfolio since May 2016.

Northwestern Mutual Series Fund, Inc. Prospectus 94

Multi-Sector Bond Portfolio – Summary

Alfred T. Murata, Managing Director of PIMCO, joined PIMCO in 2001 and has managed the Portfolio since May 2016.
Charles Watford, Executive Vice President of PIMCO, joined PIMCO in 2007, and has managed the Portfolio since December 2022.
Regina Borromeo, Executive Vice President of PIMCO, joined PIMCO in 2022, and has managed the Portfolio since December 2022

TAXES AND INTERMEDIARY COMPENSATION

95 Northwestern Mutual Series Fund, Inc. Prospectus

Active/Passive Balanced Portfolio (formerly Balanced Portfolio) – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to realize as high a level of total return as is consistent with reasonable investment risk through appreciation and income.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee(1)	0.15%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.01%
Acquired Fund Fees and Expenses	0.36%
Total Annual Portfolio Operating Expenses(2)	0.52%
Fee Waiver(1),(3)	(0.05)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1),(2),(3)	0.47%

(1)

Restated to reflect current management fees and expenses.

(2)

(3)

Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. The Example reflects adjustments made to the Portfolio's operating expenses due to the fee waiver agreement with the investment adviser for the first year only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

1 Year	3 Years	5 Years	10 Years
$48	$162	$286	$648

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

Investing in multiple investment asset classes, the Portfolio attempts to capitalize on the variation in return potential produced by the interaction of changing financial markets and economic conditions while maintaining a balance over time between investment opportunities and their associated potential risks by following a flexible policy of allocating assets.

The Portfolio is one of the Northwestern Mutual Series Fund, Inc. Allocation Portfolios (Active/Passive Allocation Suite) and operates primarily as a “fund of funds.” The Portfolio invests in a combination of both actively managed and passive (i.e., index-tracking) underlying Portfolios of Northwestern Mutual Series Fund, Inc. (each, an “Underlying Portfolio”) and exchange-traded funds (“ETFs”) which are not portfolios of Northwestern Mutual Series Fund, Inc.

Northwestern Mutual Series Fund, Inc. Prospectus 96

Active/Passive Balanced Portfolio (formerly Balanced Portfolio) – Summary

As a “balanced” Portfolio, the adviser will allocate the Portfolio’s assets to a combination of underlying funds that is expected to have a higher level of investment risk relative to the a “conservative,” fund and lower investment risk relative to a “moderate” fund. The Portfolio is designed primarily for investors comfortable with volatility associated with seeking the growth potential of equities, but who also want the income potential of bonds. The Portfolio has a target asset allocation as indicated below:

	Equity and Other* Exposure	Fixed Income or Debt Exposure	Cash Equivalents
Active/Passive Balanced Portfolio	40 – 60%	40 – 60%	0 – 10%

*Other exposure includes REIT and commodity-related investments.

These foregoing percentage target ranges are not intended to establish minimum and maximum limits. The adviser may deviate from the asset class target ranges in pursuit of total return and in response to changing market and economic conditions, and, may invest a greater or lesser percentage in any strategic asset class component when the adviser deems it favorable to do so in order to achieve the Portfolio’s investment objective.

Equity and Other Exposure: The Portfolio may obtain equity exposure by investing in one or more Underlying Portfolios or ETFs, which may hold a wide range of equity securities including small, mid and large cap U.S. and non-U.S. stocks. Equity securities could include common and preferred stocks, securities convertible into stocks and depositary receipts for those securities. “Other” exposure includes both real estate investment trusts (“REITs”) and commodities. The Portfolio may obtain exposure to REITs by investing in ETFs that hold REITs. The Portfolio may obtain commodity exposure through the purchase of swaps on physical commodities or commodity indices, including those which are traded in over-the-counter markets (“OTC”), and by investing in ETFs that provide exposure to commodities markets.

Fixed Income or Debt Exposure: The Portfolio may obtain fixed income exposure by investing in one or more fixed income Underlying Portfolios or ETFs, which may hold a wide range of fixed income securities with varying durations and maturities. The fixed income securities will consist of investment grade and non-investment grade debt securities (sometimes referred to as “high yield securities” or “junk bonds”) of corporate or government issuers as well as mortgage-backed and asset-backed securities, and inflation-indexed debt securities. The Portfolio considers a fixed income security to be investment grade if the security is rated investment grade by at least two of the three credit rating agencies (BBB- or higher by S&P; Baa3 or higher by Moody’s; BBB- or higher by Fitch) and a security to be non-investment grade if the security is rated below investment grade by at least two of the three credit ratings agencies (BB+ or lower by S&P; Ba1 or lower by Moody’s; BB+ or lower by Fitch).

Cash Equivalents: The cash equivalent portion of the Portfolio may include, but is not limited to, investments in Underlying Portfolios or ETFs that hold debt securities issued or guaranteed by the U.S. government or its agencies or instrumentalities as well as commercial paper, banker’s acceptances, certificates of deposit and time deposits. In order to enhance short duration returns, the adviser may purchase ultra-short bond ETFs.

The adviser considers a number of factors when making purchase and sales decisions with respect to the Underlying Portfolios and ETFs. With respect to the equity Underlying Portfolios and ETFs, the adviser considers their investment focus on small, mid or large market capitalizations, domestic or foreign investments, whether the Underlying Portfolio or ETF is diversified or non-diversified and whether it employs a “growth” or “value” style of investing, among other characteristics. With respect to fixed income Underlying Portfolios and ETFs, the adviser considers their focus on investment grade or non-investment grade securities, domestic or foreign investments, whether the issuer is a government or government agency, the duration (that is, a measure of the sensitivity to changes in interest rates) and maturity of the securities, and other characteristics. The adviser regularly reviews and adjusts the allocation among the Underlying Portfolios and ETFs to favor investments in those Underlying Portfolios and ETFs that the adviser believes provide the most favorable position for achieving the Portfolio’s investment objective. In connection with the allocation process, the Portfolio may invest more than 25% of its assets in one Underlying Portfolio or one ETF.

An Underlying Portfolio or ETF may invest a large percentage of its assets in a single issuer, security, market or sector (or a limited group thereof) or in the case of an international Underlying Portfolio or ETF, may invest in emerging markets, a small number of countries or a particular geographic region.

PRINCIPAL RISKS

Portfolio shares will rise and fall in value and there is a risk you could lose money by investing in the Portfolio. There can be no assurance that the Portfolio will achieve its objective. The Portfolio bears all of the risks associated with the investment strategies used by the Underlying Portfolios and ETFs and other securities in which it invests. Except as otherwise stated, references in this section to the “Portfolio” may relate to the Portfolio, one or more Underlying Portfolios, or both. The main risks of investing in this Portfolio are identified below.

•

Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

97 Northwestern Mutual Series Fund, Inc. Prospectus

Active/Passive Balanced Portfolio (formerly Balanced Portfolio) – Summary

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Affiliated Portfolio Risk – In managing the Portfolio, the adviser has the authority to select, and allocate among, Underlying Portfolios. The adviser may be subject to potential conflicts of interest in selecting Underlying Portfolios because the fees paid to it by some Underlying Portfolios are higher than the fees paid by other Underlying Portfolios. Moreover, a situation could occur where proper action for the Portfolio could be adverse to the interest of the Underlying Portfolios or vice versa.

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Asset Allocation Risk – This Portfolio allocates its investments among multiple investment asset classes and among Underlying Portfolios and ETFs, based upon judgments made by the adviser. The Portfolio could miss attractive investment opportunities by underweighting markets or sectors where there are significant returns, and could lose value by overweighting markets where there are significant declines, or may not correctly predict the times to shift assets from one type of investment to another.

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Commodities Risk – The Portfolio’s investments in ETFs and total return swaps whose performance is linked to the price of an underlying commodity or commodity index may be subject to the risks of investing in physical commodities, including risks posed by regulatory, economic and political developments, weather events, natural disasters and market disruption. Commodity prices may have greater volatility than investments in traditional securities.

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Credit Risk – The Portfolio could lose money if the issuer or guarantor of a fixed income security held directly or through an Underlying Portfolio or ETF is unwilling or unable to meet its financial obligations. In addition, changes in an issuer’s credit rating or the market’s perception of an issuer’s creditworthiness may also affect the value of the Portfolio’s investment in that issuer. Changes in credit spreads or improvements in an issuer’s credit quality may increase the risk that an issuer calls outstanding securities prior to their maturity.

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Derivatives Risk – The value of a derivative generally depends upon, or is derived from, an underlying asset, reference rate or index. The primary risks associated with the Portfolio’s use of derivatives are the risk that changes in the value of the derivatives may not correlate as intended with the underlying asset, rate or index, the risk of adverse price movements in the market, the risk of missed opportunities in other investments and the risk that the counterparty to a derivatives transaction fails to make the required payment or otherwise comply with the terms of the contract. Certain derivatives involve leverage, which could cause the Portfolio to lose more than the principal amount invested. Other risks include management, interest rate and liquidity risks. The Portfolio’s purchase of forwards and futures contracts may involve risks related to imperfect correlation between the prices of such instruments and the price of the underlying asset, as well as leverage, liquidity and volatility risks. In addition, the purchase of forwards also involves counterparty credit risk as well as heightened market risk. The Portfolio’s purchase of total return equity swap agreements and total return commodities swap agreements may pose risk arising from losses if the underlying reference asset does not perform as anticipated; such agreements are also subject to counterparty credit, liquidity and leveraging risks. The Portfolio’s use of options involve risk related to the direction and timing of market movements in the price of the underlying asset, obligations related to exercise of the option, and potential loss in value of the initial investment.

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Equity Securities Risk – The value of equity securities held through the Underlying Portfolios and ETFs, such as common and preferred stocks, could decline if the financial condition of the companies an Underlying Portfolio or ETF is invested in declines or if overall market and economic conditions deteriorate. Equity securities generally have greater price volatility than fixed income securities.

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Northwestern Mutual Series Fund, Inc. Prospectus 98

Active/Passive Balanced Portfolio (formerly Balanced Portfolio) – Summary

that their market prices may trade at a premium or discount to their net asset value, which means the Portfolio will overpay for an ETF’s assets if it is trading at a premium and will get less than the value of the ETF’s assets when selling if it is trading at a discount. An active market for an ETF may not be developed or maintained. Trading of an ETF’s shares may be halted by the exchange, in which case the Portfolio would be unable to sell its ETF shares unless and until trading is resumed. To the extent that authorized participants do not place sufficient creation and redemption orders, an ETF's shares may trade at a premium or discount or may face a trading halt or delisting. Investing in ultra-short bond ETFs may pose greater risk than investments in cash equivalents such as money market mutual funds, including risks associated with the credit quality, duration and interest rate sensitivity of the bond instruments held within such ETFs. Ultra-short bond ETFs may be more volatile and involve greater credit and interest rate risk than money market funds and other cash equivalents. In addition, the price of an ultra-short bond ETF may fluctuate, while the goal of a money market mutual fund is to maintain its NAV at a stable $1 per share. Ultra-short bond ETFs may lose money despite a stated investment objective of returning capital.

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Foreign Investing Risk – Exposure to investments in foreign securities, including through Underlying Portfolios and ETFs, may subject the Portfolio to more rapid and extreme changes in value or more losses than a fund that invests exclusively in U.S. securities. This risk is due to potentially smaller markets, differing reporting, accounting and auditing standards, and nationalization, expropriation or confiscatory taxation, currency blockage, political and economic conditions, or diplomatic developments. Foreign securities may be adversely affected by decreases in foreign currency values relative to the U.S. dollar and may be less liquid, more volatile, and harder to value than U.S. securities. Exposure to investments in emerging markets heighten these risks due to a lack of established legal, political, business and social frameworks to support securities markets.

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Fund of Funds Investing Risk – The Portfolio’s investment performance is significantly impacted by the investment performance of the Underlying Portfolios and ETFs it holds. The ability of the Portfolio to meet its investment objective is related to the ability of the Underlying Portfolios or ETFs to meet their respective investment objectives as well as the adviser’s allocation decisions with respect to the Underlying Portfolios and ETFs. Each of the Underlying Portfolios and ETFs has its own investment risks, and the Portfolio is indirectly exposed to all the risks of the Underlying Portfolios and ETFs in direct proportion to the amount of assets the Portfolio allocates to each Underlying Portfolio and each ETF. To the extent that the Portfolio invests a significant portion of its assets in a single Underlying Portfolio or ETF, it will be particularly sensitive to the risks associated with that Underlying Portfolio or ETF. Changes in the value of that Underlying Portfolio or ETF may have a significant effect on the Portfolio’s net asset value. The Portfolio will bear a pro rata share of the Underlying Portfolios’ or ETFs’ expenses.

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Geographic Focus Risk – The Portfolio’s performance could be more volatile than that of a more geographically diversified fund and could be significantly impacted as a result of the Portfolio investing a relatively large percentage of its assets in issuers located in a single country, a small number of countries, or a particular geographic region. Also, the Portfolio’s performance may be more closely tied to the market, currency, economic, political, or regulatory conditions in those countries or that region. Similarly, the extent to which an Underlying Portfolio or ETF invests a significant portion of its assets in a single country, a small number of countries or a particular geographic region, may also adversely impact the Portfolio, depending on the Portfolio’s level of investment in that Underlying Portfolio or ETF.

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High Yield Debt Risk – High yield debt securities (so called “junk bonds”) in which the Portfolio has exposure have greater interest rate and credit risk, may be more difficult to sell or sell at a reasonable price, have greater risk of loss than higher rated securities, and are predominantly speculative with respect to an issuer’s ability to pay interest and repay principal. In addition, high yield debt securities may be particularly sensitive to changes in the securities markets.

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Interest Rate Risk – Prices of fixed income instruments generally rise and fall in response to changes in market interest rates. In a rising interest rate environment, the value of the Portfolio’s fixed income investments to which the Portfolio has exposure is likely to decline. A significant rise in interest rates over a short period of time could cause significant losses in the market value of the Portfolio’s fixed income instruments. Duration measures the price sensitivity of a fixed income instrument to changes in interest rates. The Portfolio’s exposure to fixed income instruments and Underlying Portfolios or ETFs with a longer average portfolio duration will be more sensitive to changes in interest rates than those with a shorter average duration.

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Investment Style Risk – The Portfolio is subject to risks associated with an Underlying Portfolio’s or ETF's particular style of investing, such as growth or value or a combination of both, and may underperform with respect to its allocation to the Underlying Portfolio or ETF when the market does not favor that particular investment style. Different investment styles tend to shift in and out of favor, depending on market conditions and investor sentiment.

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Large Cap Company Risk – Exposure to investments in large cap stocks could cause the Portfolio to underperform in markets favoring faster growing companies. Large cap stocks tend to be more mature with fewer opportunities to grow and may not have the same growth potential as stocks with smaller capitalizations.

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Large Transaction Risk – The Underlying Portfolios are used as investments for certain fund of funds, including the Portfolio, and may have a large percentage of their shares owned by such funds. Large redemption activity by the Portfolio or another fund of funds could result in the Underlying Portfolio being forced to sell portfolio securities at a loss to meet redemptions. The adviser may coordinate directly with the portfolio managers of the Underlying Portfolios to attempt to ensure that transactions are accommodated efficiently, including possibly implementing trades over a period of days rather than all at once. These practices may temporarily affect the adviser’s ability to fully implement the Portfolio’s investment strategies.

99 Northwestern Mutual Series Fund, Inc. Prospectus

Active/Passive Balanced Portfolio (formerly Balanced Portfolio) – Summary

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Liquidity Risk – Particular investments, such as small stocks, fixed income securities, foreign securities, in particular emerging markets securities, and derivatives to which the Portfolio has exposure, can be difficult to purchase or sell at an advantageous time or price, if at all. These risks may be magnified during periods of economic turmoil or in an extended economic downturn.

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Market Risk – The risk that the market price of securities owned by the Portfolio or an Underlying Portfolio or ETF in which the Portfolio invests may go up or down, sometimes rapidly or unpredictably. The value of a security may decline due to changes in general market conditions, economic trends or events that are not specifically related to the issuer of the security, or factors that affect a particular issuer or issuers, exchange, country, group of countries, region, market, industry, group of industries, sector or asset class. Global economies and financial markets are increasingly interconnected, which magnifies the potential that conditions in one country or region might adversely impact issuers in, or foreign exchange rates with, a different country or region. Geopolitical and other events, including war, terrorism, economic uncertainty, trade disputes, public health crises (such as epidemics and pandemics), and related events have led, and in the future may lead, to increased market volatility, which may disrupt U.S. and world economies and markets and may have significant adverse direct or indirect effects on the Portfolio and its investments.

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Mortgage- and Asset-Backed Securities Risk – The risks of investing in mortgage-related and other asset-backed securities, including interest rate risk, credit risk, liquidity risk, extension risk and prepayment risk. Mortgage-related and other asset-backed securities represent interests in pools of mortgages or other assets and often involve risks that are different or possibly more acute than risks associated with other types of debt instruments. The value of some mortgage- or asset-backed securities may be particularly sensitive to changes in prevailing interest rates.

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Sector Focus Risk – To the extent the Portfolio invests in Underlying Portfolios or ETFs with a relatively high percentage of its assets in a particular sector, it will have greater exposure to the risks associated with that sector, including the risk that the securities of companies within the sector will underperform due to adverse economic conditions, regulatory or legislative changes, or increased competition affecting the sector. To the extent the Portfolio invests in Underlying Portfolios or ETFs that are underweight in other sectors, the Portfolio risks missing out on advances in those sectors.

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Small and Mid Cap Company Risk – Exposure to investments in small and mid cap stocks may cause greater risk of loss and price fluctuation than investing in stocks of larger cap companies due to a more limited track record, narrower product markets, more limited resources and less liquid trading markets. These stocks may be more volatile and more difficult to buy and sell than stocks with larger capitalizations.

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PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of a composite of indices of securities with characteristics similar to those the Portfolio typically holds (Strategy Index). The table also shows the Portfolio’s returns against indices that represent broad measures of market performance for both equity and fixed income securities (Broad-Based Indices). Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

Northwestern Mutual Series Fund, Inc. Prospectus 100

Active/Passive Balanced Portfolio (formerly Balanced Portfolio) – Summary

	Quarter/Year	Return
Best Quarter	2nd quarter, 2020	11.69%
Worst Quarter	1st quarter, 2020	-10.77%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Active/Passive Balanced Portfolio	7.43%	4.76%	5.53%
Strategy Index:	Active/Passive Balanced Portfolio Blended Composite Benchmark: S&P 500® Index (17%), S&P MidCap 400® Index (5%), S&P SmallCap 600® Index (3%), MSCI EAFE® Index (10%), MSCI® Emerging Markets Index (5%), Dow Jones U.S. Select REIT Index (4%), Bloomberg® Commodity IndexSM (4%), Bloomberg® Barclays U.S. Aggregate Bond Index (50%), and ICE of BofA® US 3-Month Treasury Bill Index (2%)	7.95%	5.45%	6.02%
Broad-Based Index:	S&P 500® Index1 (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%
Broad-Based Index:	Bloomberg® U.S. Aggregate Bond Index1 (reflects no deduction for fees, expenses or taxes)	1.25%	-0.33%	1.35%

1 The Portfolio has added these broad-based indices in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

Investment Adviser: Mason Street Advisors, LLC (MSA)
Portfolio Managers: James Fleming, CFA, Vice President of MSA, joined MSA in 2008 and has managed the Portfolio since July 2020.
Rodney Schmucker, CFA, Vice President of MSA, joined MSA in 2008 and has managed the Portfolio since July 2020.
Brent G. Schutte, CFA, Chief Investment Officer of MSA, joined MSA in December 2021 and has managed the Portfolio since January 2022.
Garrett D. Aird, CFA, Vice President of MSA, joined MSA in December 2021 and has managed the Portfolio since January 2022.

TAXES AND INTERMEDIARY COMPENSATION

101 Northwestern Mutual Series Fund, Inc. Prospectus

Active/Passive Moderate Portfolio (formerly Asset Allocation Portfolio) – Summary

INVESTMENT OBJECTIVE

The investment objective of the Portfolio is to realize as high a level of total return as is consistent with moderate investment risk through capital appreciation and secondarily through income.

FEES AND EXPENSES OF THE PORTFOLIO

Shareholder Fees

(fees paid directly from your investment)

N/A

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fee(1)	0.15%
Distribution and Service (12b-1) Fees	None
Other Expenses	0.05%
Acquired Fund Fees and Expenses	0.38%
Total Annual Portfolio Operating Expenses(2)	0.58%
Fee Waiver(1),(3)	(0.05)%
Total Annual Portfolio Operating Expenses After Fee Waiver(1),(2),(3)	0.53%

(1)

Restated to reflect current management fees and expenses.

(2)

(3)

Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. The Example reflects adjustments made to the Portfolio's operating expenses due to the fee waiver agreement with the investment adviser for the first year only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

1 Year	3 Years	5 Years	10 Years
$54	$181	$319	$721

Portfolio Turnover

PRINCIPAL INVESTMENT STRATEGIES

The Portfolio is one of the Northwestern Mutual Series Fund, Inc. Allocation Portfolios (Active/Passive Allocation Suite). and operates primarily as a “fund of funds.” The Portfolio invests in a combination of both actively managed and passive (i.e., index-tracking) underlying Portfolios of Northwestern Mutual Series Fund, Inc. (each, an “Underlying Portfolio”) and exchange-traded funds (“ETFs”) which are not portfolios of Northwestern Mutual Series Fund, Inc.

Northwestern Mutual Series Fund, Inc. Prospectus 102

Active/Passive Moderate Portfolio (formerly Asset Allocation Portfolio) – Summary

As a “moderate” Portfolio, the adviser will allocate the Portfolio’s assets to a combination of underlying funds that is expected to have a higher level of investment risk relative to the a “conservative” or “balanced” fund and lower investment risk relative to an “aggressive” fund. The Portfolio is designed primarily for investors comfortable with volatility associated with seeking the growth potential of equities, but who also seek some income potential from bonds. The Portfolio has a target asset allocation as indicated below:

	Equity and Other* Exposure	Fixed Income or Debt Exposure	Cash Equivalents
Active/Passive Moderate Portfolio	60 – 80%	20 – 40%	0 – 10%

*Other exposure includes REIT and commodity-related investments.

PRINCIPAL RISKS

103 Northwestern Mutual Series Fund, Inc. Prospectus

Active/Passive Moderate Portfolio (formerly Asset Allocation Portfolio) – Summary

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Active Management Risk – The adviser’s investment strategies and techniques may not perform as expected which could cause the Portfolio to underperform other mutual funds or lose money.

•

Derivatives Risk – The value of a derivative generally depends upon, or is derived from, an underlying asset, reference rate or index. The primary risks associated with the Portfolio’s use of derivatives are the risk that changes in the value of the derivatives may not correlate as intended with the underlying asset, rate or index, the risk of adverse price movements in the market, the risk of missed opportunities in other investments and the risk that the counterparty to a derivatives transaction fails to make the required payment or otherwise comply with the terms of the contract. Certain derivatives involve leverage, which could cause the Portfolio to lose more than the principal amount invested. Other risks include management, interest rate and liquidity risks. The Portfolio’s purchase of forwards and futures contracts may involve risks related to imperfect correlation between the prices of such instruments and the price of the underlying asset, as well as leverage, liquidity and volatility risks. In addition, the purchase of forwards also involves counterparty credit risk as well as heightened market risk. The Portfolio’s purchase of total return equity swap agreements and total return commodities swap agreements may pose risk arising from losses if the underlying reference asset does not perform as anticipated; such agreements are also subject to counterparty credit, liquidity and leveraging risks. The Portfolio’s use of options involve risk related to the direction and timing of market movements in the price of the underlying asset, obligations related to exercise of the option, and potential loss in value of the initial investment.

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Northwestern Mutual Series Fund, Inc. Prospectus 104

Active/Passive Moderate Portfolio (formerly Asset Allocation Portfolio) – Summary

•

Exchange Traded Funds Risk – Investing in exchange traded funds (ETFs) may expose the Portfolio to greater risk of loss and price fluctuation than investing directly in a comparable portfolio of stocks comprising the index due to lack of liquidity, the additional expenses incurred as a shareholder in another investment company, and tracking error. ETFs are also subject to the risk that their market prices may trade at a premium or discount to their net asset value, which means the Portfolio will overpay for an ETF’s assets if it is trading at a premium and will get less than the value of the ETF’s assets when selling if it is trading at a discount. An active market for an ETF may not be developed or maintained. Trading of an ETF’s shares may be halted by the exchange, in which case the Portfolio would be unable to sell its ETF shares unless and until trading is resumed. To the extent that authorized participants do not place sufficient creation and redemption orders, an ETF's shares may trade at a premium or discount or may face a trading halt or delisting. Investing in ultra-short bond ETFs may pose greater risk than investments in cash equivalents such as money market mutual funds, including risks associated with the credit quality, duration and interest rate sensitivity of the bond instruments held within such ETFs. Ultra-short bond ETFs may be more volatile and involve greater credit and interest rate risk than money market funds and other cash equivalents. In addition, the price of an ultra-short bond ETF may fluctuate, while the goal of a money market mutual fund is to maintain its NAV at a stable $1 per share. Ultra-short bond ETFs may lose money despite a stated investment objective of returning capital.

•

Interest Rate Risk – Prices of fixed income instruments generally rise and fall in response to changes in market interest rates. In a rising interest rate environment, the value of the Portfolio’s fixed income investments to which the Portfolio has exposure is likely to decline. A significant rise in interest rates over a short period of time could cause significant losses in the market value of the Portfolio’s fixed income instruments. Duration measures the price sensitivity of a fixed income instrument to changes in interest rates. The Portfolio’s exposure to fixed income instruments and Underlying Portfolios or ETFs with a longer average portfolio duration will be more sensitive to changes in interest rates than those with a shorter average duration.

•

105 Northwestern Mutual Series Fund, Inc. Prospectus

Active/Passive Moderate Portfolio (formerly Asset Allocation Portfolio) – Summary

•

Mortgage- and Asset-Backed Securities Risk – The risks of investing in mortgage-related and other asset-backed securities, including interest rate risk, credit risk, liquidity risk, extension risk and prepayment risk. Mortgage-related and other asset-backed securities represent interests in pools of mortgages or other assets and often involve risks that are different or possibly more acute than risks associated with other types of debt instruments. The value of some mortgage- or asset-backed securities may be particularly sensitive to changes in prevailing interest rates.

•

Northwestern Mutual Series Fund, Inc. Prospectus 106

Active/Passive Moderate Portfolio (formerly Asset Allocation Portfolio) – Summary

•

PERFORMANCE

The following bar chart illustrates the risks of investing in the Portfolio by showing how the performance of the Portfolio has varied from year to year. The table to the right of the bar chart shows the Portfolio’s average annual total return over certain time periods and compares the Portfolio’s returns with those of a composite of indices of securities with characteristics similar to those the Portfolio typically holds (Strategy Index). The table also shows the Portfolio’s returns against indices that represent broad measures of market performance for both equity and fixed income securities (Broad-Based Indices). Returns are based on past results and are not an indication of future performance. Neither the bar chart nor the table reflects the fees and expenses separately charged by the variable annuity contract or variable life insurance policy separate account that invests in the Portfolio and returns would be lower if those fees and expenses were reflected.

	Quarter/Year	Return
Best Quarter	2nd quarter, 2020	14.30%
Worst Quarter	1st quarter, 2020	-14.95%

Average Annual Total Return
(for periods ended December 31, 2024)

		1 Yr	5 Yr	10 Yr
Portfolio:	Active/Passive Moderate Portfolio	9.72%	6.17%	6.72%
Strategy Index:	Active/Passive Moderate Portfolio Blended Composite Benchmark: S&P 500® Index (28%), S&P 400® MidCap Index (7%), S&P SmallCap 600® Index (3%), MSCI EAFE® Index (15%), MSCI® Emerging Markets Index (6%), Dow Jones U.S. Select REIT Index (4%), Bloomberg® Commodity IndexSM (5%), Bloomberg® Barclays U.S. Aggregate Bond Index (30%), and ICE of BofA® US 3-Month Treasury Bill Index (2%)	10.66%	7.18%	7.42%
Broad-Based Index:	Bloomberg® U.S. Aggregate Bond Index1 (reflects no deduction for fees, expenses or taxes)	1.25%	-0.33%	1.35%
Broad-Based Index:	S&P 500® Index1 (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%

1 The Portfolio has added these broad-based indices in response to new regulatory requirements.

PORTFOLIO MANAGEMENT

TAXES AND INTERMEDIARY COMPENSATION

107 Northwestern Mutual Series Fund, Inc. Prospectus

SUMMARY OF IMPORTANT INFORMATION REGARDING THE PORTFOLIOS

Tax Information: Shares of the Portfolios are offered only for funding variable annuity contracts and variable life insurance policies offered by The Northwestern Mutual Life Insurance Company through separate accounts. Insurance company separate accounts generally do not pay tax on dividends or capital gain distributions. Investors in variable annuity contracts and variable life insurance policies should refer to the prospectuses for the variable products for a discussion of the tax considerations that affect the insurance company and its separate accounts and the tax consequences to investors of owning such products.

Compensation to Broker-Dealers and Other Financial Intermediaries: Neither the Portfolios nor any related companies pay compensation to broker-dealers or other financial intermediaries for the sale of Portfolio shares or related services. Investors in variable annuity contracts and variable life insurance policies should refer to the prospectuses for the variable products for important information about compensation paid to financial intermediaries for sales of variable annuity contracts and variable life insurance policies.

INTRODUCTION

Northwestern Mutual Series Fund, Inc. (the “Fund”) is a mutual fund that offers its shares in separate investment portfolios, each of which is listed on the cover of this Prospectus (each, a “Portfolio” and collectively the “Portfolios”) and in the “PORTFOLIO SUMMARIES” section at the beginning of this Prospectus. Shares of the Portfolios are offered and sold only for funding variable annuity contracts (“Annuity Contracts”) and variable life insurance policies (“Life Insurance Policies”) offered by The Northwestern Mutual Life Insurance Company (“Northwestern Mutual”). The terms of the Annuity Contracts and Life Insurance Policies are described in separate offering documents for those products.

Mason Street Advisors, LLC (“Mason Street Advisors” or the “Adviser”) is the investment adviser for each Portfolio. To assist in managing certain Portfolios, Mason Street Advisors has retained certain sub-advisers (each, a “Sub-Adviser” or, with respect to those Portfolios for which it provides services, an “Adviser” and collectively, the “Sub-Advisers”). Pursuant to an exemptive order from the Securities and Exchange Commission that permits the Fund to employ a “manager of managers” structure, each such Sub-Adviser may be replaced

without the approval of shareholders. Information about the Adviser and each Sub-Adviser can be found in the “INVESTMENT ADVISER AND SUB-ADVISERS” section of this Prospectus.

Each Portfolio has its own investment objective and strategies for achieving that objective. Before investing, make sure the Portfolio’s objective matches your own. You can find a summary of each Portfolio’s investment objective, fees and expenses, principal investment strategies, principal risks, performance, and other important information under the “PORTFOLIO SUMMARIES” section of this Prospectus. For additional information about the Portfolios’ investment strategies and risks, please refer to the “MORE ABOUT INVESTMENT STRATEGIES AND RISKS” section of this Prospectus.

This Prospectus contains important information you should review before investing in a Portfolio. To obtain more information about the Portfolios, please refer to the back cover of this Prospectus.

Northwestern Mutual Series Fund, Inc. Prospectus 108

MORE ABOUT INVESTMENT STRATEGIES AND RISKS

General Information

This section includes information about the investment objectives and policies of the Portfolios and certain information about investing in the Portfolios. This section also includes additional information about the principal investment strategies of the Portfolios and associated risks described in the “PORTFOLIO SUMMARIES” section of this Prospectus. Although one or more Portfolios may employ the strategies described below as principal investment strategies, each other Portfolio may employ such strategies as non-principal strategies, unless otherwise noted. The Fund’s Statement of

Additional Information contains more detailed information about the investment strategies, securities and techniques that may be used by the Portfolios.

Investment Objectives. The table below lists the investment objective(s) of each Portfolio. The investment objective(s) of each of the Portfolios is non-fundamental, which means that it may be changed by the Fund’s Board of Directors without shareholder approval. Unless otherwise stated, all investment policies of the Portfolios may be changed by the Board of Directors without shareholder approval.

Portfolio	Objective	Portfolio	Objective
Growth Stock	Long-term growth of capital. Current income is a secondary objective.	International Growth	Long-term growth of capital.
Focused Appreciation	Long-term growth of capital.	Research International Core	To seek capital appreciation.
Large Cap Core Stock	Long-term growth of capital and income.	International Equity	Long-term growth of capital and income.
Large Cap Blend	Long-term growth of capital and income.	Emerging Markets Equity	To seek capital appreciation.
Index 500 Stock	To approximate the performance of the S&P 500® Composite Stock Price Index.	Government Money Market	Maximum current income to the extent consistent with liquidity and stability of capital.
Large Company Value	Long-term capital growth. Income is a secondary objective.	Short-Term Bond	To seek as high a level of current income as is consistent with prudent investment risk.
Domestic Equity	Long-term growth of capital and income.	Select Bond	To seek as high a level of total return as is consistent with prudent investment risk. A secondary objective is to seek preservation of shareholders’ equity.
Equity Income	Long-term growth of capital and income.	Long-Term U.S. Government Bond	To seek maximum total return, consistent with preservation of capital and prudent investment management.
Mid Cap Growth Stock	Long-term growth of capital.	Inflation Managed	To pursue total return using a strategy that seeks to protect against U.S. inflation.
Index 400 Stock	To approximate the performance of the S&P MidCap 400® Stock Price Index.	High Yield Bond	To achieve high current income and capital appreciation.

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Portfolio	Objective	Portfolio	Objective
Mid Cap Value	Long-term capital growth. Current income is secondary objective.	Multi-Sector Bond	To seek maximum total return, consistent with prudent investment management.
Small Cap Growth Stock	Long-term growth of capital.	Active/Passive Balanced	To realize as high a level of total return as is consistent with reasonable investment risk through appreciation and income.
Index 600 Stock	To approximate the performance of the S&P SmallCap 600® Index.	Active/Passive Moderate	To realize as high a level of total return as is consistent with moderate investment risk through appreciation and secondarily through income.
Small Cap Value	Long-term growth of capital.

Allocation Suite. The Portfolios are part of the Northwestern Mutual Series Fund, Inc. Allocation Portfolios (Active/Passive Allocation Suite). Each Portfolio of the Active/Passive

Allocation Suite has a target asset allocation consistent with the level of risk indicated in the table below.

	Equity and Other* Exposure	Fixed Income or Debt Exposure	Cash Equivalents
Active/Passive Balanced Portfolio	40 – 60%	40 – 60%	0 – 10%
Active/Passive Moderate Portfolio	60 – 80%	20 – 40%	0 – 10%

*Other exposure includes REIT and commodity-related investments.

Investment Policies. Pursuant to Rule 35d-1 under the Investment Company Act of 1940, as amended, each Portfolio (except the Focused Appreciation, Research International Core, Inflation Managed, Active/Passive Balanced, and Active/Passive Moderate Portfolios) has adopted a non-fundamental investment policy to invest under normal circumstances at least 80% of net assets, plus any borrowings for investment purposes, in accordance with the investment focus suggested by its name (each a “Names Rule Policy”). The Index 500 Stock, Index 400 Stock and Index 600 Stock Portfolios each expects to invest all, or substantially all, of its assets in stocks that make up the applicable index. Any derivatives that provide exposure to the investment focus suggested by the Portfolio's name, or to one or more market risk factors associated with the investment focus suggested by the Portfolio's name, are counted (as applicable) toward compliance with the Portfolio's 80% investment policy.

In addition, effective May 1, 2016, and in connection with its conversion to a “government money market fund” under Rule 2a-7 of the Investment Company Act of 1940, as amended, the Government Money Market Portfolio (formerly, the “Money Market Portfolio”) added the term “government” to its name and pursuant to Rule 35d-1 adopted a non-fundamental

investment policy to invest under normal circumstances at least 80% of net assets in obligations issued or guaranteed as to principal and interest by the U.S. government, its agencies or instrumentalities, and repurchase agreements secured by such obligations. As a “government money market fund” under Rule 2a-7, the Government Money Market Portfolio must also meet a separate requirement to invest at least 99.5% of its total assets in cash, obligations issued or guaranteed as to principal and interest by the U.S. government, its agencies or instrumentalities, and repurchase agreements secured by such obligations or cash. Although the 99.5% requirement under Rule 2a-7 and the 80% policy under Rule 35d-1 are similar, the 99.5% requirement permits a broader range of investments than just government securities (i.e., it includes cash).

Each such Portfolio will provide notice to its shareholders at least 60 days prior to any change to its 80% investment policy.

Determining Portfolio Investment Limitations. Except for a Portfolio’s policies with respect to investments in illiquid securities and borrowing, the asset and security percentage limitations included in these policies and elsewhere in this Prospectus and the Statement of Additional Information apply at the time of purchase of a security and, unless otherwise

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stated, asset percentage limitations apply to the Portfolio’s net (not total) assets as calculated by the Portfolio for determining its net asset value per share. Maximum percentage limitations shall not be considered violated unless an excess over the percentage occurs immediately after, and is caused by, an acquisition of securities or assets of, or borrowings by, a Portfolio.

With a change in the rating of a debt security, the Adviser will review the security’s fundamentals and determine whether it continues to be an appropriate investment for the applicable Portfolio. Except as indicated in a Portfolio’s investment strategy, a downgrade in a security’s credit quality rating is not an automatic signal to sell that security.

Market Capitalizations. The average market capitalization of a particular index, the companies that compose the index and the individual sizes of those companies may change over time. For the Portfolios that pursue an investment strategy that involves investments in companies within a range of market capitalizations or in companies the capitalizations of which do not exceed the maximum capitalization of a particular index, each Portfolio may continue to hold investments in companies that move above or below the applicable capitalization range. However, in accordance with each Portfolio’s Name Rule Policy, any investments that fall outside of the applicable capitalization range generally will comprise less than 20% of a Fund’s net assets (plus any borrowings for investment purposes).

Investing Risk, In General. As with any investment, an investment in a Portfolio has risks. Portfolio shares will rise and fall in value and there is a risk that you could lose money by investing in a Portfolio. Your investment in a Portfolio is not a deposit with a bank and is not insured, endorsed or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Your investment in Portfolio shares, which represents an indirect investment in the securities owned by the Portfolio, is subject to market risk. The market price of securities owned by a Portfolio may go up or down, sometimes rapidly or unpredictably. Securities may decline in value due to factors affecting securities markets generally or particular industries represented in the securities markets. The value of a security may decline due to general market conditions that are not specifically related to a particular company. The value of a security may also decline due to factors that affect a particular industry or industries. During a general downturn in the securities markets, multiple asset classes may decline in value simultaneously. Equity securities generally have greater price volatility than fixed income securities. However, the value of fixed income securities may also be significantly affected by market events such as changes in interest rates, and will likely decline in a rising interest rate environment. At any point in time, your Portfolio shares may be worth less than what you invested, even after taking into account the reinvestment of dividends and distributions. Regardless of how well an individual company performs, if financial markets go down, you could lose money.

Special Market Events. The value of a Portfolio’s investments may decline because of economic changes or other events, such as inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, regulatory events, other governmental trade or market control programs and related geopolitical events. The global economies and financial markets are becoming increasingly interconnected, which increases the possibility that conditions in one country or region might adversely impact issuers in a different country or region. The Fund cannot predict the effects of geopolitical or other events in the future on the U.S. and other economies, the securities markets, or the Portfolios.

Unanticipated Events. Local and global markets and normal market operations can be adversely affected by significant market disruptions. Market disruptions can be caused by local, regional or global events such as war, military conflict, political instability, acts of terrorism, social unrest, environmental disasters, natural disasters or events, trade disputes, supply chain disruptions, spread of infectious diseases or other public health issues, climate change, recessions, or other events. Such events may affect certain sectors, industries, businesses, geographic regions or countries more significantly than others. Climate change, the outbreak of infectious diseases or other public health issues may exacerbate other pre-existing political, social, economic, market and financial risks. The impact of any such events could negatively affect the global economy as well as the economies of individual countries, the financial performance of individual companies, sectors and industries, and the markets in general in significant and unforeseen ways. In addition, any of such circumstances could result in disruptions in the trading markets and could result in increased market volatility. Such events could adversely affect the prices and liquidity of a Portfolio’s securities and could have a materially negative impact on the value of a Portfolio. Such events also could impact the ability of the Fund to process transactions or perform other operational activities.

COVID-19 and Other Infectious Diseases. Certain illnesses spread rapidly and have the potential to significantly and adversely affect the global economy. Many countries have experienced outbreaks of infectious diseases in recent decades, including swine flu, avian influenza, SARS and, more recently, COVID-19. Outbreaks of infectious diseases may have material adverse impacts on a Portfolio. The impact of infectious diseases in developing or emerging market countries may be greater due to less established health care systems. Certain sectors, industries, countries or companies may be more significantly and negatively impacted than others by any disruption caused by an infectious disease.

The projected ongoing impact of the COVID-19 pandemic, and other epidemics and pandemics that may arise in the future, on national and global economies, individual companies and the financial markets is unpredictable and may

111 Northwestern Mutual Series Fund, Inc. Prospectus

result in uncertainty for potentially extended periods of time. The duration and effectiveness of responsive measures implemented by governments and central banks cannot be predicted.

Risks Related to Russian Invasion of Ukraine. The Russian invasion of Ukraine in February 2022 has resulted in an ongoing military conflict, triggering the imposition of economic sanctions by the U.S. and other countries against certain Russian governmental institutions, individuals and companies. The imposition of sanctions and other actions undertaken by countries and businesses, have resulted in, and may continue to result in, significant market disruptions in the region and beyond. The extent and duration of Russia’s military actions or future escalation of such hostilities, the scope of regional and country-specific responsive measures, and potential retaliatory actions or countermeasures that may be taken by Russia, are difficult to predict, but could result in significant market disruptions. These and any related events could have a significant negative impact on the performance of a Portfolio, even if the Portfolio does not have direct exposure to Russian issuers or those of adjoining geographic regions.

Government Policies. Policy and legislative changes in the United States and in other countries are affecting many aspects of financial regulation, and governmental and quasi-governmental authorities and regulators throughout the world have responded to economic disruptions with a variety of significant fiscal and monetary policy changes, including but not limited to direct capital infusions into companies, new monetary programs and changes in interest rates. The impact of these policies and legislative changes on the markets, and the practical implications for market participants, may not be fully known for some time. A reversal of these policies, or the ineffectiveness of these policies, could increase volatility in securities markets, which could adversely impact a Portfolio’s investments.

Federal Reserve Actions. Since September 2024, the Federal Open Market Committee (“FOMC”) lowered interest rate levels by a full percentage point from its peak of 4.25% to 4.50% after having maintained the target range for the federal funds rate at 5.25% to 5.50% for 14 months, the highest level since October 2007. The FOMC participants noted the decline in inflation seen during the latter part of 2024 and a slowing labor market as conditions that contributed to the decision to lower the federal funds rate.

At its March 2024 meeting, the FOMC observed that while inflation had eased over the prior year, it remained elevated, and again determined to maintain the target range for the federal funds rate at 5.25% to 5.50%. The FOMC also stayed on course with balance sheet reduction plans, determining to continue to further reduce the Federal Reserve’s holdings of Treasury securities, agency debt, and agency mortgage-backed securities.

The level of interest rates impacts many aspects of economic activity. Higher interest rates result in higher borrowing costs for companies and consumers. Slowing

economic growth could result in a weaker job market and higher unemployment. Higher borrowing costs, rising interest rates, less available capital and a potential decline in consumer spending could have a negative impact on the markets and the economy as a whole. Periods of economic change and uncertainty also can be expected to result in increased volatility of market prices.

U.S. Government Impasses. The U.S. government’s inability at times to agree on a long-term budget and deficit reduction plan has in the past resulted, and may in the future result, in a government shutdown, which could have an adverse effect on a Portfolio’s investments and operations. Additional and/or prolonged government shutdowns may affect investor and consumer confidence and may adversely impact financial markets and the broader economy, perhaps suddenly and to a significant degree.

Information on Standard & Poor’s. “Standard & Poor’s®”, “S&P®”, “S&P 500®”, “S&P® Mid Cap 400 Index”, “Standard & Poor’s Mid Cap 400 Index”, “Standard & Poor’s 500”, “S&P® SmallCap 600” and “Standard & Poor’s Small Cap 600” are trademarks of The McGraw-Hill Companies, Inc. and have been licensed for use by Northwestern Mutual. Neither the Fund nor any Portfolio is sponsored, endorsed, sold or promoted by Standard & Poor’s and Standard & Poor’s makes no representation regarding the advisability of investing in the Fund or a Portfolio. Please see the Statement of Additional Information which sets forth certain additional disclaimers and limitations of liabilities on behalf of S&P.

More About Principal Investment Strategies and Risks

The following section contains additional information about the principal investment strategies used by the Portfolios and the principal risks associated with these investment strategies. Principal investment strategies, which are presented in alphabetical order, are identified by an underlined paragraph header. Within each strategy section, principal risks are identified by italicized paragraph headers. Although one or more Portfolios may pursue the strategies discussed below as principal strategies (as noted in the summaries for the individual Portfolios and throughout this section), each other Portfolio has the authority to invest in the types of securities and employ the strategies described below as non-principal strategies, unless otherwise noted.

Active Management. All Portfolios (other than index portfolios) are actively managed by their Adviser or Sub-Adviser. The performance of a Portfolio that is actively managed will reflect in part the ability of its manager(s) to make investment decisions that are suited to achieving the Portfolio’s investment objective.

Active Management Risk. If the Portfolio manager’s investment strategies do not perform as expected, the Portfolio could underperform other mutual funds with similar investment objectives or lose money.

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Active and Frequent Trading. Active management of a Portfolio may also result in active trading of Portfolio securities. The Select Bond, Long-Term U.S. Government Bond and Multi-Sector Bond Portfolios use active and frequent trading as a principal investment strategy to pursue their respective investment objectives, as set forth in the summaries for the foregoing Portfolios.

Risks of Active and Frequent Trading. Active and frequent trading can increase the portfolio turnover rate and may lead to higher brokerage commissions and other transaction costs. A higher portfolio turnover rate may have a greater adverse affect on the Portfolio’s performance. Portfolio turnover rates may vary from year to year.

ADRs. The Portfolios may invest in American Depositary Receipts and American Depositary Shares (collectively, ADRs) and other similar depositary receipts. The Growth Stock, Focused Appreciation, Large Cap Core Stock, Large Cap Blend, Large Company Value, Equity Income, Mid Cap Growth Stock, Mid Cap Value, Small Cap Growth Stock, Small Cap Value, International Growth, Research International Core, International Equity and Emerging Markets Equity Portfolios may invest in ADRs as a principal investment strategy. ADRs are receipts representing ownership of shares of a foreign issuer held by a U.S. bank or similar financial institution that entitle the holder to all dividends and capital gains on the underlying foreign shares. ADRs are typically denominated in U.S. dollars and trade in the U.S. securities markets. ADRs are alternatives to directly purchasing the underlying foreign securities in their national markets and currencies. ADRs are considered foreign securities for purposes of limitations stated herein regarding foreign securities except as specifically noted.

ADR Risk. ADRs and similar depositary receipts are subject to many of the same risks as direct investments in foreign securities, including the risk that material information about the issuer may not be disclosed in the United States and the risk that currency fluctuations may adversely affect the value of the ADR. See “Risks of Foreign Investing” below. The financial institution may charge fees for forwarding dividends and interest and for other services. The Portfolios are also exposed to the credit risk of the financial institution holding the ADRs. ADRs may be “sponsored,” meaning that they are implemented by a financial institution in collaboration with the issuing foreign company, or “unsponsored,” meaning that the financial institution created the instrument without the sponsorship or direct involvement of the foreign company. Differing registration requirements apply to each type of ADR. ADRs may transact on exchanges or on over-the-counter markets (“OTC”). Sponsored ADRs may be established on three program levels, which differ with respect to market listing exposure and applicable reporting requirements. Level 1 sponsored ADRs are exempt from full SEC registration and reporting and only trade on OTC markets. For Level 2 and

Level 3 sponsored ADRs, the issuing financial institution and foreign company jointly register the ADR with the Securities and Exchange Commission (“SEC ”), after which the ADRs can be listed and traded on major U.S. stock exchanges. These ADR programs are subject to SEC registration requirements (including the requirement to file an annual report and comply with U.S. accounting standards) and exchange listing requirements. Unlike a sponsored ADR where the depositary has an exclusive relationship with the foreign issuer, an unsponsored ADR may be created by a depositary institution independently and without the cooperation of the foreign issuer. Consequently, information concerning the foreign issuer may be less current or reliable for an unsponsored ADR and the price of an unsponsored ADR may be more volatile than if it was a sponsored ADR. Depositaries of unsponsored ADRs are not required to distribute shareholder communications received from the foreign issuer or to pass through voting rights to its holders. The holders of unsponsored ADRs generally bear all the costs associated with establishing the unsponsored ADR, whereas the foreign issuers typically bear certain costs in a sponsored ADR. Unsponsored ADRs generally trade only in OTC markets. Conducting transactions in OTC markets may result in higher costs, a lack of pricing transparency and lower liquidity when compared with exchange-based transactions. Based on the foregoing, risks associated with different ADR types will vary, based upon differences in registration, reporting, listing and disclosure requirements that apply to such ADRs and the characteristics of the market in which transactions for the particular ADR are conducted.

Asset Allocation Strategy. As a principal investment strategy, the Active/Passive Balanced Portfolio and the Active/Passive Moderate Portfolio allocate their investments among multiple investment asset classes, among Underlying Portfolios and ETFs, and among various segments of markets, based upon judgments made by the portfolio manager. No other Portfolio employs an asset allocation strategy, either as a principal investment strategy, or a non-principal investment strategy.

Asset Allocation Risk. A Portfolio could miss attractive investment opportunities by underweighting markets or sectors where there are significant returns and could lose value by overweighting markets where there are significant declines, or may not correctly predict the times to shift assets from one type of investment to another.

Contingent Convertible Instruments. The Multi-Sector Bond Portfolio may invest in contingent convertible securities as a principal investment strategy. Contingent convertible securities (“CoCos”) are a form of hybrid debt security that may be either converted into equity or have their principal written down upon the occurrence of certain “triggers.” Such triggers are generally linked to the inability of the issuing institution to maintain applicable regulatory capital thresholds or to the discretionary action on the part of the issuer’s regulator based upon the

113 Northwestern Mutual Series Fund, Inc. Prospectus

regulator’s assessment of the issuer’s ongoing financial viability. CoCos’ unique equity conversion or principal write-down features are tailored to the issuing banking institution and its regulatory requirements. See, “Equity Securities, Risks of Convertible Securities” below. Some additional risks associated with CoCos include, but are not limited to:

Economic Risk. CoCos have fully discretionary coupons. This means coupons can potentially be deferred or cancelled at the banking institution’s discretion or at the request of the relevant regulatory authority in order to help the bank absorb losses. Such deferral or cancellation of the coupons will not cause an event of default. In addition, CoCos often contain both regulatory call and tax call provisions which grant the issuer the right to repurchase the securities under certain conditions, typically tied to negative financial impacts caused by a changing regulatory or tax environment.

Commodities. The Active/Passive Moderate and Active/Passive Balanced Portfolios may invest in instruments, including exchange traded funds and total return swaps, whose performance is linked to the price of an underlying commodity or commodity index. To the extent a Portfolio makes such investments, the Portfolio may be subject to the risks associated with investing in physical commodities. Commodity prices may be significantly impacted by regulatory, economic and political developments, weather events, and natural disasters, pestilence and market disruption. As a result, commodity-related investments may have greater volatility than investments in traditional securities.

Derivatives. The Index 500 Stock, Large Company Value, Index 400 Stock, Mid Cap Value, Index 600 Stock, Short-Term Bond, Long-Term U.S. Government Bond, Inflation Protection, Multi-Sector Bond, International Equity, Select Bond, Active/Passive Balanced, and Active/Passive Moderate Portfolios may use derivative instruments as described in their respective summary section. The other Portfolios may, but are not required to, use derivative instruments individually or in combination to seek to protect its assets, implement a tax or cash management strategy, gain or manage exposures, adjust duration or as part of its investment strategies to seek to enhance returns. Generally, derivatives are financial contracts whose value depends upon, or is derived from, the value of an underlying asset, reference rate or index, and may relate to stocks, bonds, interest rates, currencies or currency exchange rates, commodities and related indices. Examples of derivative instruments include options contracts, forward and futures contracts (including foreign currency forwards and futures), options on futures contracts, and swap agreements (including, but not limited to, interest rate, total return equity, total return commodities, total return fixed income, inflation, and credit default swaps). Each Portfolio may invest in derivative instruments, subject to the Portfolio’s objective and policies. For purposes of determining whether a Portfolio has invested at least 80% of net assets (plus any borrowing for investment purposes) in a particular type of security, the Portfolio may include a derivative instrument in the 80% base to the extent it has economic characteristics

similar to the securities included in the base. A portfolio manager may decide not to employ any of these strategies and there is no assurance that any derivatives strategy used by a Portfolio will succeed. A description of these and other derivative instruments that the Portfolios may use are described under “MORE ABOUT THE PORTFOLIOS’ OBJECTIVES AND STRATEGIES – Derivative Instruments” in the Statement of Additional Information.

Risks of Derivatives. A Portfolio’s use of derivative instruments involves risks different from, or greater than, the risks associated with investing directly in securities and other more traditional investments. A description of various risks associated with particular derivative instruments is included in the “MORE ABOUT THE PORTFOLIOS’ OBJECTIVES AND STRATEGIES – Derivative Instruments” section of the Statement of Additional Information. The following provides a more general discussion of important risk factors relating to derivative instruments that may be used by the Portfolios.

Management Risk. Derivative products are highly specialized instruments that require investment techniques and risk analyses different from those associated with stocks and bonds. The use of a derivative requires an understanding not only of the underlying instrument but also of the derivative itself, without the benefit of observing the performance of the derivative under all possible market conditions. Derivative instruments used by a Portfolio may experience losses because the investment techniques and risk analyses applied did not produce the desired results.

Correlation Risk. Changes in the value of the derivative may not correlate as intended with the underlying asset, rate or index. This may also be referred to as basis risk. For example, changes in the value of a hedging instrument may not match those of the investment being hedged.

Counterparty Risk. The use of a derivative instrument involves the risk that a loss may be sustained as a result of the failure of another party to the contract (i.e., a counterparty or clearinghouse) to make required payments or otherwise comply with the contract’s terms. This risk is partially mitigated if collateral or margin has been posted and is held against the position.

Credit Risk. A derivative instrument may involve credit risk and the value of a Portfolio’s derivative instrument may be negatively affected to the extent that the issuer of an underlying asset will be unable to make principal and interest payments when due or otherwise honor its obligations. Underlying assets are subject to varying degrees of credit risk. The extent to which a derivative instrument involves credit risk may increase due to the leverage component of the derivative instrument. See “Leverage Risk,” below.

Interest Rate Risk. When interest rates change, the value of a Portfolio’s derivatives instruments may be negatively affected to the extent the derivative instrument or its underlying asset, reference rate or index are sensitive to changes in market

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interest rates. The extent to which a derivative instrument involves interest rate risk may increase due to the leverage component of the derivative instrument. See “Leverage Risk,” below.

Liquidity Risk. Liquidity risk exists when a particular derivative instrument is difficult to purchase or sell. If a derivative transaction is particularly large or if the relevant market is illiquid (as is the case with many privately negotiated derivatives), it may not be possible to initiate a transaction or liquidate a position at an advantageous time or price. These risks may be magnified during periods of economic turmoil or in an extended economic downturn.

Leverage Risk. Because derivatives have a leverage component, adverse changes in the value or level of the underlying asset, reference rate or index can result in a loss substantially greater than the amount invested in the derivative itself. Certain derivatives have the potential for unlimited loss, regardless of the size of the initial investment. When a Portfolio uses derivatives for leverage, investments in that Portfolio will tend to be more volatile, resulting in larger gains or losses in response to market changes.

Commodities Related Investments Risk. Exposure to the commodities markets may subject a Portfolio to greater volatility than investments in traditional securities. The value of commodity-linked derivative investments may be affected by changes in overall market movements, commodity index volatility, changes in inflation, interest rates, or factors affecting a particular industry or commodity, such as drought, floods, weather, embargoes, tariffs and international economic, political and regulatory developments.

Rule 18f-4 Requirements related to Derivatives. Effective August 19, 2022, the Series Fund has adopted a derivatives risk management program pursuant to Rule 18f-4. Rule 18f-4 permits a fund to enter into derivatives transactions provided it adopts and implements a derivatives risk management program (including the appointment of a derivatives risk manager and the implementation of certain testing requirements) and complies with specific value-at-risk leverage limits for certain derivatives users and reporting requirements in respect of derivatives usage. Rule 18f-4 could restrict a Portfolio’s ability to engage in certain derivatives transactions and/or increase the costs of such derivatives transactions, which could adversely affect the value or performance of a Portfolio.

Lack of Availability. Because the markets for certain derivative instruments (including markets located in foreign countries) are relatively new and still developing, suitable derivatives transactions may not be available in all circumstances for risk management or other purposes. In addition, certain market conditions, such as those present in a zero-interest rate environment or during periods of extreme

volatility, which have recently occurred, may make the use of certain derivatives financially unattractive or impractical. There is no assurance that a Portfolio will engage in derivatives transactions at any time or from time to time. A Portfolio’s ability to use derivatives may also be limited by certain regulatory and tax considerations.

Market and Other Risks. Like most other investments, derivative instruments are subject to the risk that the market value of the instrument will change in a way detrimental to a Portfolio’s interest due to market events unanticipated by the Adviser or a Sub-Adviser. If the Adviser or Sub-Adviser incorrectly forecasts the values of securities, currencies or interest rates or other economic factors in using derivatives for a Portfolio, the Portfolio might have been in a better position if it had not entered into the transaction at all. While some strategies involving derivative instruments can reduce the risk of loss, they can also reduce the opportunity for gain or even result in losses by offsetting favorable price movements in other Portfolio investments.

Other risks in using derivatives include the risk of mispricing or improper valuation of derivatives. Valuation for derivatives may not be readily available in the market. Valuation may be more difficult in times of market turmoil since many investors and market makers may be reluctant to purchase complex instruments or quote prices for them. Bilateral derivatives contracts are privately negotiated directly with the counterparty, while exchange-traded derivatives are traded via an exchange. Different counterparties often use different valuation techniques for determining the value of a derivative, and while the portfolio reconciliation process can help to highlight differences in valuation, there is little guidance from regulators on how such discrepancies should be resolved. Additionally, a common provision in privately negotiated derivative contracts permits the counterparty to the contract to terminate the derivative contract, if the value of a Portfolio’s total net assets declines by a specified amount over a specific time period. The decline of a Portfolio’s total net assets (which usually must be significant) could be caused by shareholder redemptions and/or a decrease in market value of its securities. The termination of the derivative contract in such an instance may adversely affect the Portfolio by increasing losses and/or costs and/or preventing the Portfolio from fully implementing its investment

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strategies. In addition, a Portfolio’s use of derivatives may cause the Portfolio to realize higher amounts of short-term capital gains (generally taxed at ordinary income tax rates) than if the Portfolio had not used such instruments.

Furthermore, SEC regulations may make derivatives more costly, may limit the availability or reduce the liquidity of derivatives, or may otherwise adversely affect the value or performance of derivatives. See, “MORE ABOUT THE PORTFOLIOS’ OBJECTIVES AND STRATEGIES – Derivative Instruments – Regulatory Impact” in the Statement of Additional Information for more information.

Diversification. Each Portfolio, other than the Focused Appreciation Portfolio, is classified as a diversified investment company pursuant to the Investment Company Act of 1940, as amended (the “1940 Act”). Diversification requirements are measured at the time of acquisition of investments. Subsequent market fluctuations in the values of acquired securities that cause a Portfolio to exceed prescribed diversification limits will not result in the Portfolio losing its status as a diversified investment company, provided that the Portfolio complies with constraints that apply to new acquisitions, as provided under the 1940 Act. The Focused Appreciation Portfolio is classified as a non-diversified investment company as defined under the 1940 Act.

Non-Diversification Risk. A non-diversified Portfolio may hold a relatively large percentage of its assets in a single issuer or small number of issuers. As a result, its performance could be closely tied to the value of that one issuer or issuers and could be more volatile than the performance of more diversified funds.

Equity Securities. The equity portion of each Portfolio designed to invest primarily in equity securities as a principal investment strategy (Growth Stock, Focused Appreciation, Large Cap Core Stock, Large Cap Blend, Index 500 Stock, Large Company Value, Domestic Equity, Equity Income, Mid Cap Growth Stock, Index 400 Stock, Mid Cap Value, Small Cap Growth Stock, Index 600 Stock, Small Cap Value, International Growth, Research International Core, International Equity, and Emerging Markets Equity Portfolios, each, an “Equity Portfolio”) and the equity portions of the Active/Passive Balanced and Active/Passive Moderate Portfolios through their fund-of-funds strategy, may include common stocks and preferred stocks and (except for the Index 400 Stock, Index 500 Stock and Index 600 Stock Portfolios), rights, warrants, and securities convertible into common or preferred stocks. Entities such as limited partnerships, limited liability companies, business trusts and companies organized outside the United States may issue equity securities comparable to common or preferred stock. Equity securities may also include interests in real estate investment trusts, or REITs. See “Real Estate Investment Trusts (REITs)”, below. Each of the Portfolios designed to invest primarily in fixed income securities (Short-Term Bond, Select Bond, Long-Term U.S. Government Bond, Inflation Protection, High Yield Bond, and Multi-Sector Bond Portfolios, each, a “Fixed Income Portfolio”) may invest in

common and preferred stocks and other types of equity securities as a principal investment strategy as may be identified in the respective Portfolio’s summary, and otherwise as a non-principal investment strategy.

Risks of Equity Securities, Generally. Equity securities represent equity ownership in a company. Stock markets are volatile. The price of equity securities will fluctuate and can decline and reduce the value of a Portfolio investing in equities. The price of equity securities fluctuate based on changes in a company’s financial condition and overall market and economic conditions. The value of equity securities purchased by a Portfolio could decline if the financial condition of the companies the Portfolio is invested in declines or if overall market and economic conditions deteriorate. An issuer of a security purchased by a Portfolio may perform poorly, and, therefore, the value of its common stocks and preferred stocks may decline. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, or other factors.

Risks of Preferred Stocks. Preferred stocks often lack a fixed maturity or redemption date and are therefore more susceptible to price fluctuations when interest rates change. Preferred stocks also carry a greater risk of non-receipt of income because unlike interest on debt securities, dividends on preferred stocks must be declared by the issuer’s board of directors before becoming payable. Claims on assets and earnings of an issuer by a preferred stockholder are subordinate to the claims of all creditors but senior to the claims of common stockholders in a liquidation or reorganization of an issuer under bankruptcy or similar laws.

Risks of Large Cap Companies. Even Portfolios that invest in high quality or “blue chip” equity securities or securities of established companies with large market capitalizations (which generally have strong financial characteristics) can be negatively impacted by poor overall market and economic conditions. Companies with large market capitalizations may also have less growth potential than smaller companies and may be able to react less quickly to change in the marketplace.

Risks of Small and Mid Cap Companies. Each Portfolio may invest to varying degrees in small and mid cap stocks, subject to the Portfolio’s objectives and policies. Small and mid cap companies may have more growth potential and may be able to react to market conditions more quickly; however, small and mid cap stocks may involve greater risks of loss and price fluctuation than stocks of companies with larger capitalizations. Small and mid-sized companies often have a more limited track record, have narrower markets for their products and services and more limited managerial and financial resources than larger, more established companies. These stocks may react differently to issuer, political, market and economic developments than stocks with larger capitalizations. Also, the trading markets for small and mid cap stocks tend to be less

Northwestern Mutual Series Fund, Inc. Prospectus 116

liquid than securities of larger companies, which may result in difficulty buying or selling a small or mid cap stock, especially during periods of market volatility.

Risks of Micro Cap Companies. Each Portfolio may invest in varying degrees in micro cap stocks, subject to the Portfolio’s objectives and policies. The Small Cap Growth Stock, Small Cap Value and Emerging Markets Equity Portfolios may invest in micro cap companies as a principal investment strategy. Micro cap companies may have more growth potential and may be able to react to market place conditions more quickly, however, investing in micro cap stocks may involve greater risks than investing in stocks of companies with larger capitalizations. Micro cap companies often have a more limited track record, narrower markets for their products and services and more limited managerial and financial resources and face a greater risk of business failure. For these reasons, the prices of micro cap securities are typically more volatile and their markets less liquid than small, mid-and large cap stocks.

Risks of Rights and Warrants. Investments in rights and warrants may be more volatile than the underlying common stock and may cause the Portfolio increased risk of loss if the rights or warrants cannot be exercised prudently by the expiration date or if the rights and warrants lack a liquid secondary market for resale. Warrants can provide exposure to an underlying stock for a portion of the price of direct ownership of shares of that stock. As a result, most warrants have some degree of leverage, which can vary depending on the type of warrant. This means that small changes in the value of the underlying stock results in larger changes in the value of the warrant. This can magnify gains when stock prices rise, but it can also magnify losses when stock prices fall.

Risks of When Issued Securities. When issued securities involve risk that the security the Portfolio buys may lose value prior to its delivery or may not be issued causing the Portfolio to incur a loss. This risk is in addition to the risk that the Portfolio’s other assets will decline in value. Therefore, these transactions may result in a form of leverage and increase a Portfolio’s overall investment exposure. Please see “When Issued, Delayed Delivery and Forward Commitment Transactions” below, which describes additional information about such transactions.

Risks of Dividend-Paying Stocks. The Equity Income Portfolio focuses on large capitalization stocks with a strong record of paying dividends, and other Portfolios that invest in equity securities may hold dividend-paying stocks as well. Dividend-paying stocks, and Portfolios that invest in them, may underperform similar funds that invest without consideration of a company’s track record of paying dividends. Stocks of companies with a history of paying dividends may not participate in a broad market advance to the same degree as most other stocks, and a sharp rise in interest rates or economic downturn could cause a company to unexpectedly reduce or eliminate its dividend. Currently, interest rates are near historically low levels.

Risks of Convertible Securities. Convertible securities can be bonds, notes, debentures, preferred stock or other securities which are convertible into common stock. Convertible securities are subject to both the credit and interest rate risks associated with fixed income securities and to the stock market risk associated with equity securities. The value of a convertible security may not increase or decrease as rapidly as the underlying common stock. A Portfolio may be forced to convert a security before it would otherwise choose, which may have an adverse effect on the Portfolio’s ability to achieve its investment objective. See “Contingent Convertible Instruments”, above, for more information specifically related to investments in such securities.

Fixed Income Securities. Each of the Fixed Income Portfolios may invest in various types of debt investments as a principal investment strategy, which may include:

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corporate debt securities of U.S. and non-U.S. issuers, including convertible securities;

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obligations of the U.S. government, its agencies and instrumentalities, including government sponsored enterprises (see “U.S. Government Securities”, below);

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pass-through securities (i.e., securities that enable investors to received payments derived from a pool of underlying assets), generally including mortgage- and asset-backed securities;

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loan participations and assignments, and dollar roll transactions (i.e., selling a mortgage-backed security for immediate settlement and simultaneously agreeing to purchase the same type of security on a future date at a discount);

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inflation-indexed bonds issued by both governments and corporations;

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municipal securities issued by states or local governments and their agencies;

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obligations of non-U.S. governments or their agencies;

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money market instruments, such as repurchase agreements: and

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Rule 144A securities (i.e., privately placed securities that can be sold without SEC registration only among qualified institutional buyers (“QIBs”) such as investment banks, pension funds, and large investment managers).

The debt securities in which the Fixed Income Portfolios may invest as a principal investment strategy are noted in the summaries for each of the Fixed Income Portfolios. The Fixed Income Portfolios may also invest in any other debt securities as a non-principal investment strategy, consistent with the particular Portfolio’s investment objective and strategy. The Equity Portfolios may invest in debt securities as a non-principal strategy consistent with the Portfolio’s investment objective and strategy.

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Investments in fixed income securities involve risks different from investments in equity securities. The primary risks associated with an investment in fixed income securities are as follows:

Interest Rate Risk. When interest rates change, the value of a Portfolio’s investments may be affected because prices of debt investments generally rise and fall in response to changes in market interest rates. When interest rates rise, the prices of fixed income investments fall. Changes in interest rates can be sharp and the effect on the value of fixed income investments can be significant. Any change in a central bank’s monetary policy or improving economic conditions may result in an increase in interest rates. See “Investing Risk, In General – Federal Reserve Actions”, above, for information regarding the Federal Reserve Bank’s recent actions on interest rates and monetary policy. A significant rise in interest rates over a short period of time could cause significant losses in the market value of a Portfolio’s fixed income investments. Duration is a measure of the sensitivity of the price of a Portfolio’s fixed income securities to changes in interest rates; the longer the duration, the more sensitive the price will be to changes in interest rates. Similarly, a Portfolio with a longer average portfolio duration will be more sensitive to changes in interest rates than a Portfolio with a shorter average portfolio duration. By way of example, the price of a bond fund with an average duration of three years would be expected to fall approximately 3% if interest rates rose by one percentage point.

Credit Risk. Credit risk is the risk that an issuer will be unable to make principal and interest payments when due. A Portfolio could lose money if the issuer or guarantor of a fixed income security, or the counterparty to a derivatives contract, repurchase agreement or a loan of portfolio securities is unwilling or unable to make timely principal and/or interest payments, or to otherwise honor its obligations. In times of extreme economic turmoil or in an extended economic downturn, the risk of default may increase. Securities are subject to varying degrees of credit risk, which are often reflected in credit ratings. Credit ratings are essentially opinions of credit rating agencies as to the credit quality of the issuer, the lower the credit rating, the greater the credit risk. Changes in an issuer’s credit rating or the market’s perception of an issuer’s creditworthiness may also affect the value of a Portfolio’s investment in that issuer. A lower credit rating may lead to a decline in the value of a fixed income security because investors may demand a higher rate of interest to compensate for the perceived increased credit risk of the issuer. Credit ratings, however, may prove to be inaccurate. In determining the credit quality of a fixed income security for the Portfolios’ investment strategies, the Fund primarily considers the credit ratings assigned to the security by Standard & Poor’s Ratings Service (“S&P”), Moody’s Investors Service, Inc. (“Moody’s) and Fitch Ratings (“Fitch”). The Fund considers a fixed income security to be investment grade if the security is rated investment grade by at least two of the three credit rating agencies (BBB- or higher by S&P; Baa3 or higher by Moody’s; BBB- or higher by Fitch) and a security to be non-investment

grade (sometimes referred to as “high yield” or “junk”) if the security is rated below investment grade by at least two of the three credit ratings agencies (BB+ or lower by S&P; Ba1 or lower by Moody’s; BB+ or lower by Fitch). If a security is rated by only two of the three credit ratings agencies, then the Fund assigns the security with the lower of the two ratings. If only one of the three credit ratings agencies rates a security, then the Fund assigns the security that agency’s rating. And if a security is unrated, then the Fund considers the security to be investment grade or non-investment grade if determined by the Portfolio’s Adviser or Sub-Adviser to be of comparable quality.

Call or Prepayment Risk. Call or Prepayment Risk is the risk that an issuer will pay principal on an obligation earlier than scheduled or expected, which would accelerate cash flows from, and shorten the average life of, the security. Bonds are typically called when interest rates have declined. In the event of a bond being called, the Adviser or Sub-Adviser may have to reinvest the proceeds in lower yielding securities to the detriment of the Portfolio.

Extension Risk. If interest rates rise, repayments of fixed income securities may occur more slowly than anticipated by the market. This may drive the prices of these securities down because their interest rates are lower than the current interest rate and they remain outstanding longer.

LIBOR Reference Rate and Transition Risk. Certain of the Fixed Income Portfolios may hold debt securities and other financial investments that utilize the Intercontinental Exchange London Interbank Offered Rate (“LIBOR”) as their reference or benchmark rate. Prior to the discontinuation of the formal maintenance of all LIBOR settings on June 30, 2023, LIBOR was used extensively in the U.S. and globally as the reference rate for various commercial and financial contracts, including corporate and municipal bonds and loans, floating rate mortgages, asset-backed securities, consumer loans, and interest rate swaps and other derivatives.

During the past several years, concerns arose over the continued viability of LIBOR as a reference benchmark, since it had become less of a robust, transactions-based market interest rate as contemplated by various international standards for benchmarks. The Financial Stability Oversight Council noted that the scarcity of underlying transactions had made LIBOR potentially unsustainable.

In July 2017, the UK Financial Conduct Authority (“FCA”), the regulator of LIBOR, indicated that it would not compel LIBOR panel banks to continue to make LIBOR submissions beyond the end of 2021, and strongly advised market participants of the need to transition to the use of a different benchmark rate for new securities and transactions by December 31, 2021. Following discussion with LIBOR panel banks, the ICE Benchmark Administration Limited (“IBA”) announced that it would formally consult with the foregoing groups on its intention to cease publication of a number of LIBOR settings, including (i) All LIBOR settings for the following currencies: EUR, CHF, JPY, GBP, and USD LIBOR settings (1 week and 2

Northwestern Mutual Series Fund, Inc. Prospectus 118

months) from and after December 31, 2021; and (ii) USD LIBOR settings (overnight and 1, 3, 6, and 12 months) from and after June 30, 2023.

The need to transition away from LIBOR to alternative reference rates is not limited to USD LIBOR. Most major currency jurisdictions identified a need for reforming major interest rate benchmarks and working groups were formed in other currencies for which LIBOR had been quoted. Bank working groups and regulators in such other major currency jurisdictions developed other alternatives for their markets, including the Sterling Overnight Interbank Average Rate in England.

The Alternative Reference Rates Committee (the “ARRC”), a working group of large U.S. banks and other market participants, actively worked with U.S. market participants to plan for the transition away from LIBOR and developed best practices as well as specific fallback language for incorporation into LIBOR-based contracts.

Actions by regulators have resulted in the establishment of alternative reference rates to LIBOR in most major currencies. The U.S. Federal Reserve, based on the recommendations of the ARRC, has been publishing a Secured Overnight Financing Rate (“SOFR”), which has replaced U.S. dollar LIBOR. Market participants generally have adopted alternative rates such as SOFR or otherwise amended such financial instruments to include fallback provisions and other measures that contemplated the discontinuation of LIBOR. To facilitate the transition of legacy derivatives contracts referencing LIBOR, the International SWAPs and Derivatives Association, Inc. (“ISDA”) launched a protocol to incorporate fallback provisions.

Although the transition process away from the use of LIBOR has become increasingly well-defined and replacement reference rates have been established for all LIBOR currencies, the potential effects of the transition away from LIBOR on a Portfolio or on certain instruments in which a Portfolio invests may be difficult to ascertain if such instruments designate the LIBOR reference rate. Investments that involve individual contracts that have no existing fallback provisions, inadequate fallback provisions, or have no language that contemplates the discontinuance of LIBOR could experience increased volatility or reduced liquidity as a result of the transition process. Interest rate provisions included in such contracts may need to be renegotiated in contemplation of the LIBOR transition and the application of a replacement rate may result in a reduction in the value of certain instruments held by a Portfolio. Further, an instrument’s transition to a replacement rate could result in variations in the reported yields of a Portfolio that holds such instrument. In addition, use of a replacement benchmark rate and any accompanying pricing adjustments imposed by a regulator or by counterparties or otherwise may adversely affect a Portfolio’s performance and/or NAV.

Environmental, Social and Governance (“ESG”) Factors. Certain of the Portfolios reference the incorporation of ESG factors as part of the principal investment strategies employed

in connection with the sub-adviser’s management of the particular Portfolio. There is not a single or uniform approach to the integration and consideration of ESG factors as part of a sub-adviser’s investment process or philosophy. None of the Portfolios of the Series Fund offers an ESG-based investment strategy. Rather, those Portfolios that reference the incorporation of ESG factors in their investment approach integrate the consideration of such factors as circumstances may warrant, along with the consideration of multiple other factors deemed relevant to the sub-adviser, based on the judgment of the Portfolio’s portfolio managers and the application of the individualized investment philosophy applied by the sub-adviser. As a result, the basis and method by which ESG factors are incorporated into a particular sub-adviser’s investment process or philosophy will vary over time and across sub-advisory firms.

ESG Risk. Incorporating the consideration of ESG factors in the investment process may result in the exclusion of certain securities for non-investment reasons and therefore the Portfolio may forego some market opportunities available to funds that do not consider ESG factors. The evaluation of ESG factors may affect the Portfolio’s exposure to certain issuers or industries and may not work as intended. The Portfolio may underperform other funds that do not consider ESG factors or that use different ESG factors to evaluate a security. Information used to evaluate ESG factors may not be readily available, complete, or accurate, and may vary across providers and issuers, as ESG factors are not uniformly defined or assessed. There is no guarantee that evaluating ESG considerations for individual securities will positively contribute to the Portfolio’s performance results.

Focused Security Investing. Although diversified, the Domestic Equity Portfolio typically only invests in a smaller number of companies than the other Portfolios as a result of pursuing a focused investment strategy as a principal investment strategy.

Security Focus Risk. To the extent a Portfolio invests its assets in a small number of issuers, the Portfolio’s performance could be closely tied to the value of one or a small group of issuers and therefore could be more volatile than the performance of funds with more numerous holdings.

Foreign Securities. The International Growth, Research International Core, International Equity, Emerging Markets Equity and Multi-Sector Bond Portfolios each have an unlimited ability to invest in foreign securities as part of their principal investment strategies. The Index 400 Stock, Index 500 Stock and Index 600 Stock Portfolios will only invest in foreign securities if such securities are added to their respective benchmark index. Each other Portfolio may invest in foreign securities as a principal investment strategy as set forth in the summary for each such Portfolio or may otherwise invest in foreign securities as a non-principal investment strategy.

Except as noted below, for purposes of applying the foreign investment limitation, “foreign securities” shall mean:

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•

securities of companies whose principal trading activities are outside the U.S.; or

•

securities denominated in non U.S. dollar currencies; or

•

securities of companies that:

•

are organized under the laws of, or have principal offices in, a country other than the U.S., and

•

derive 50% or more of their total revenue from either goods or services produced or sales made in markets outside the U.S.; or

•

American Depositary Receipts and American Depositary Shares.

Portfolios that invest in securities denominated in non-U.S. dollar currencies may enter into forward foreign currency exchange contracts and invest in foreign currency futures contracts.

Foreign securities may include securities of issuers economically tied to countries with developing (or “emerging market”) economies. A security is economically tied to an emerging market country if it: i) is organized under the laws of, or has its principal office in an emerging market country; ii) has its principal securities trading market in an emerging market country; and/or iii) derives the majority of its annual revenue or earnings or assets from goods produced, sales made or services performed in an emerging market country. The Adviser or Sub-Adviser has broad discretion to identify and invest in countries that it considers to qualify as emerging securities markets. Emerging market countries include countries determined by the Adviser or Sub-Adviser to have emerging market economies, taking into account a number of factors, such as the country’s credit rating, its political and economic stability and the development of its financial and capital markets. Emerging market countries include, but are not limited to, countries that comprise the MSCI Emerging Markets Index.

Risks of Foreign Investing. A Portfolio that invests in foreign securities may experience more rapid and extreme changes in value than a Portfolio that invests exclusively in securities of U.S. companies. To the extent a Portfolio invests a relatively large percentage of its assets in issuers located in a single country, a small number of countries, or a particular geographic region, the Portfolio’s performance could be closely tied to the market, currency, economic, political, or regulatory conditions and developments in those countries or that region, and could be more volatile than the performance of more geographically diversified funds. Specific risks of investing in foreign securities include the following:

Political and Economic Risk. Foreign investments can be subject to greater political and economic risks, including political, economic, and social instability. In some countries, there is the risk that the government may take over assets or operation of the company or impose taxes or place limits on the removal of assets that would adversely affect the value of the security. The possibility of default in foreign government

securities, political or social instability or diplomatic developments generally are more of a concern in developing countries, where the possibility of political instability (including revolution) and dependence on foreign economic assistance may be greater than in developed countries. In the event of nationalization, expropriation or other confiscation, a Portfolio could lose its entire investment in foreign securities.

Regulatory Risk. In many countries there is less publicly available information about issuers than is available for companies in the U.S. Foreign companies may not be subject to uniform accounting, auditing and financial reporting standards, and auditing practices and requirements may not be comparable to those applicable to U.S. companies. In many foreign countries there is less government supervision and regulation of business and industry practices, stock exchanges, brokers, and listed companies than in the U.S., and it may be more difficult to obtain or enforce judgments against foreign entities.

Foreign Market Risk. Foreign securities often trade with less frequency and volume than domestic securities and are therefore less liquid and more volatile than securities of comparable domestic issuers. Further, the settlement period of securities transactions in foreign markets may be longer than in domestic markets.

Transaction Costs. Commission rates in foreign countries, which are generally fixed rather than subject to negotiation as in the U.S., are likely to be higher. In addition, other costs, such as taxes and custody costs, are generally higher than for domestic transactions.

Foreign Currency Risk. Portfolios that invest in securities that trade in, and receive revenues in, foreign (non-U.S.) currencies, or in derivatives that provide exposure to foreign (non-U.S.) currencies, are subject to the risk that those currencies will decline in value relative to the U.S. dollar, or, in the case of hedged positions, that the U.S. dollar will decline in value relative to the currency being hedged. Currency rates in foreign countries may fluctuate significantly over short periods of time for a number of reasons, including changes in interest rates, intervention (or the failure to intervene) by U.S. or foreign governments, central banks or supranational entities such as the International Monetary Fund, or by the imposition of currency controls or other political developments in the U.S. or abroad. As a result, a Portfolio’s investments in foreign currency denominated securities may reduce the returns of the Portfolio. Additionally, restrictions on currency trading that are imposed by foreign countries may have an adverse effect on the value of the securities of companies that trade or operate in those countries.

Forward Foreign Currency Exchange Contracts Risk. Forward foreign currency exchange contracts are OTC contracts to purchase or sell a specific currency at a future date at a price set at the time of the contract. Forward foreign currency exchange contracts can be used to reduce a Portfolio’s exposure to changes in the value of the currency it will deliver, to shift exposure to foreign currency fluctuations from one

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currency to another or to increase a Portfolio’s exposure to changes in the value of the currency that it will receive for the duration of the contract. Forward foreign currency exchange contracts do not eliminate fluctuations in the value of non-U.S. securities but rather allow the Portfolio to establish a fixed rate of exchange for a future point in time. Foreign currency transactions can be affected unpredictably by intervention (or the failure to intervene) by U.S. or foreign governments or central banks, or by currency controls or political developments. Such events may prevent or restrict a Portfolio’s ability to enter into foreign currency transactions, force the Portfolio to exit a foreign currency transaction at a disadvantageous time or price or result in penalties for the Portfolio, any of which may result in a loss to the Portfolio. A contract to sell a foreign currency would limit any potential gain that might be realized if the value of the currency increases. Suitable hedging transactions may not be available in all circumstances and there can be no assurance that a Portfolio will engage in such transactions at any given time or from time to time. A Portfolio engaging in forward foreign currency exchange contracts will be subject to counterparty credit risk and any failure to perform by a counterparty could result in a loss to the Portfolio.

Emerging Markets Risk. Investing in emerging market securities imposes risks different from, or greater than, risks of investing in domestic securities or in foreign, developed countries. These risks include: smaller market capitalization of securities markets, which may suffer periods of relative illiquidity; significant price volatility; restrictions on foreign investment; and possible repatriation of investment income and capital. In addition, foreign investors may be required to register the proceeds of sales; future economic or political crises could lead to price controls, forced mergers, expropriation or confiscatory taxation, seizure, nationalization, or creation of government monopolies. The currencies of emerging market countries may experience significant declines against the U.S. dollar, and devaluation may occur subsequent to investments in these currencies by a Portfolio. Inflation and rapid fluctuations in inflation rates have had, and may continue to have, negative effects on the economies and securities markets of certain emerging market countries. Many developing countries are heavily dependent on international trade and can be adversely affected by trade barriers and protectionist measures, as well as the depreciation or devaluation of their currencies.

Additional risks of emerging markets securities may include: greater social, economic and political uncertainty and instability; more substantial governmental involvement in the economy; less governmental supervision and regulation; unavailability of currency hedging techniques; companies that are newly organized and small; differences in auditing and financial reporting standards, which may result in unavailability of material information about issuers; and less developed legal systems. Shares of companies that only trade on an emerging market securities exchange are not likely to file reports with the SEC. The availability of financial information about such companies, and its reliability, may be compromised

since such companies are generally not subject to the same regulatory, accounting, auditing, or auditor oversight requirements applicable to companies that file reports with the SEC.

Investors in emerging markets may not have the ability to seek certain legal remedies in U.S. courts as private plaintiffs. As a practical matter, investors may have to rely on domestic legal remedies that are available in the emerging market and such remedies are often limited and difficult for international investors to pursue. Shareholder claims, including class action and securities law and fraud claims, generally are difficult or impossible to pursue as a matter of law or practicality in many emerging markets. In addition, the SEC, U.S. Department of Justice and other authorities often have substantial difficulties in bringing and enforcing actions against non-U.S. companies and non-U.S. persons, including company officers and directors, in certain emerging markets due to jurisdictional limitations, matters of comity and various other factors.

In addition, emerging securities markets may have different clearance and settlement procedures, which may be unable to keep pace with the volume of securities transactions or otherwise make it difficult to engage in such transactions. Settlement problems may cause a Portfolio to miss attractive investment opportunities, hold a portion of its assets in cash pending investment, or be delayed in disposing of a portfolio security. Such a delay could result in possible liability to a purchaser of the security.

Asian Investing Risk. Certain of the Portfolios may invest a significant portion of their assets in Asian securities, and those Portfolios may be more volatile than a portfolio that is broadly diversified geographically. Such investments are subject to general economic and political conditions in Asia and the Asia region may be subject to a greater degree of economic, political, and social instability than is the case in the U.S. and Europe. Many Asian countries can be characterized as emerging markets or newly industrialized and tend to experience more volatile economic cycles than developed countries and are subject to the risks described above under “Emerging Markets Risk.” Many countries in Asia have historically experienced political uncertainty, corruption, military intervention, social unrest, and natural disasters.

Investing in Asian companies could be adversely affected by major hostilities in the region. If a military conflict or the perception of such a conflict occurs, it could affect many aspects of the region’s economy, which may subject a Portfolio to increased volatility. Many Asian countries are dependent on the economies of the U.S. and Europe as key trading partners. Reduction in spending on products and services or changes in the U.S. or European economies or their relationships with countries in the region may cause an adverse impact on the regional economy, which may have a negative impact on a Portfolio’s investments. Most of the securities markets of Asia have substantially less volume than markets in the U.S., and equity and debt securities of most companies in Asia are less liquid and more volatile than equity and debt securities of U.S.

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companies of comparable size. In addition, Asia has historically depended on oil for most of its energy requirements. Almost all of its oil is imported. In the past, oil prices have had a major impact on the Asian economy. Further, the Asian region has in the past experienced earthquakes, mud slides and tidal waves of varying degrees of severity (e.g., tsunami), and the risks of such phenomena, and the damage resulting from natural disasters, continue to exist.

China Investing. In addition to the risks of investing in foreign securities, and the risks of emerging markets and Asian investing as described above, investing in China presents additional risks. To the extent a Portfolio focuses its investments in China and Hong Kong, the value of the Portfolio may be significantly more volatile than more geographically diverse Portfolios.

Hong Kong reverted to Chinese sovereignty on July 1, 1997. Although China is obligated to maintain the current capitalist economic and social system of Hong Kong through June 30, 2047, the continuation of economic and social freedoms enjoyed in Hong Kong is dependent on the government of China. There is no guarantee that China will continue to honor its agreement to allow Hong Kong to maintain a high degree of autonomy with regard to its political, legal and economic systems, and China may change its policies regarding Hong Kong at any time. Any attempt by China to tighten its control over Hong Kong's political, economic or social policies may result in an adverse effect on Hong Kong's economy. Hong Kong’s evolving relationship with China’s central government has been a source of political unrest and may result in economic disruption. In addition, China is Hong Kong's largest trading partner, both in terms of exports and imports. The economy of Hong Kong is closely tied to the economy of China. Any changes in the Chinese economy, trade regulations or currency exchange rates may have an adverse impact on Hong Kong's economy.

Additional risks associated with investments in China and Hong Kong include exposure to currency fluctuations, less liquidity, expropriation, confiscatory taxation, nationalization, exchange control regulations (including currency blockage), trading halts, imposition of tariffs, limitations on repatriation, and differing legal standards. Any spread of an infectious illness, public health threat or similar issue could reduce consumer demand or economic output, result in market closures, travel restrictions or quarantines, and generally have a significant impact on the Chinese economy, which in turn could adversely affect a Portfolio’s investments. Inflation and rapid fluctuations in inflation and interest rates have had, and may continue to have, negative effects on the economies and securities markets of China or Hong Kong. The Chinese government could, at any time, alter or discontinue economic reform programs implemented many years ago and could return to the prior, completely centrally planned, economy. Military conflicts, either in response to internal social unrest or conflicts with other countries, are an ever present consideration. Actual and threatened responses to such military conflicts, internal social unrest, cyberattacks and other activities, including

purchasing restrictions, sanctions, tariffs or cyberattacks on the Chinese government or Chinese companies, may adversely impact China’s economy and Chinese issuers of securities. The Chinese economy is highly dependent on exporting products and services and could experience a significant slowdown if there is a reduction in global demand for Chinese exports or as the result of trade tensions with key trading partners. The adoption or continuation of protectionist trade policies by one or more countries (including the U.S.) could lead to decreased demand for Chinese products and have an adverse effect on the Chinese securities markets. The current political climate has intensified concerns about heightened trade tensions between China and the U.S., as each country has imposed, and may in the future impose additional, tariffs on the other country’s products. These actions may result in a significant reduction in international trade, the oversupply of certain manufactured goods, substantial price reductions of goods and possible failure of individual companies and/or large segments of China’s export industry, which could have a negative impact on a Portfolio’s performance. U.S. companies that source material and goods from China and those that make large amounts of sales in China would be particularly vulnerable to an escalation of trade tensions. Developments regarding the course and impact of changing trade policies between the U.S. and China are difficult to predict and it is unclear whether further tariffs may be imposed or other escalating actions may be taken in the future.

Chinese authorities may intervene in the China securities market and halt or suspend trading of securities for short or even longer periods of time. The Chinese securities market continues to experience considerable volatility and has been subject to relatively frequent and extensive trading halts and suspensions. These trading halts and suspensions have, among other things, contributed to uncertainty in the markets and reduced the liquidity of the securities subject to such trading halts and suspensions, which could include securities held by the Portfolios.

A Portfolio may gain exposure to companies based or operated in China by investing through legal structures known as variable interest entities. See, “Variable Interest Entities.”

Variable Interest Entities. A Portfolio may obtain exposure to companies based or operated in China by investing through legal structures known as variable interest entities (“VIEs”), which utilize offshore companies established by the Chinese company to facilitate foreign investment. Because of Chinese governmental restrictions on non-Chinese ownership of companies in certain industries in China, certain Chinese companies have used VIEs to facilitate foreign investment without distributing direct ownership of companies based or operated in China. In such cases, the Chinese operating company establishes an offshore company, and the offshore company enters into contractual arrangements (often through an intermediary entity) with the Chinese company. These contractual arrangements are intended to give the offshore company the ability to exercise power over and obtain economic rights from the Chinese company. Shares of the

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offshore company, in turn, are listed and traded on exchanges outside of China and are available to non-Chinese investors, such as the Fund. This arrangement allows non-Chinese investors in the offshore company to obtain economic exposure to the Chinese company without direct equity ownership in the Chinese company.

Although VIEs are a longstanding industry practice and well known to officials and regulators in China, VIEs are not formally recognized under Chinese law. There is a risk that China may cease to tolerate VIEs at any time or impose new restrictions on the structure, in each case either generally or with respect to specific industries, sectors or companies. Investments involving a VIE may also pose additional risks because such investments are made through a company whose interests in the underlying Chinese company are established through contract rather than through equity ownership. For example, in the event of a dispute, the offshore company’s contractual claims with respect to the Chinese company may be deemed unenforceable in China, thus limiting (or eliminating) the remedies and rights available to the offshore company and its investors. Such legal uncertainty may also be exploited against the interests of the offshore company and its investors. Further, the interests of the equity owners of the Chinese company may conflict with the interests of the investors of the offshore company, and the fiduciary duties of the officers and directors of the Chinese company may differ from, or conflict with, the fiduciary duties of the officers and directors of the offshore company. The VIE structure generally restricts a Portfolio’s ability to influence the Chinese company through proxy voting and other means and may restrict the ability of an issuer to pay dividends to shareholders from the Chinese company’s earnings. VIE structures also could face delisting or other ramifications for failure to meet the requirements of the SEC, the Public Company Accounting Oversight Board (PCAOB) or other United States regulators. If these risks materialize, the value of investments in VIEs could be adversely affected and a Portfolio could incur significant losses with no recourse available.

Debt Obligations of Foreign Governments. The issuer of the foreign debt or the governmental authorities that control the repayment of the debt may be unable or unwilling to repay principal or interest when due, and the Portfolio may have limited recourse in the event of a default. The market prices of debt obligations of governments and their agencies, and the Portfolio’s net asset value, may be more volatile than prices of U.S. debt obligations.

European Economic Developments and Ongoing Brexit Risk. The Economic and Monetary Union of the European Union (“EU”) requires compliance with restrictions on inflation rates, deficits, interest rates, debt levels and fiscal and monetary controls, each of which may significantly affect every country in Europe. Decreasing imports or exports, changes in governmental or EU regulations on trade, changes in the exchange rate of the euro (the common currency of certain EU countries), the default or threat of default by an EU member country on its sovereign debt, and/or an economic recession in

an EU member country may have a significant adverse effect on the economies of EU member countries and their trading partners. Political events, including nationalist unrest in Europe, uncertainties surrounding the sovereign debt of a number of EU countries and the viability of the EU (or the euro) itself, also may cause market disruptions. In addition, a number of countries in Europe have suffered terrorist attacks and additional attacks may occur in the future. Such attacks may cause uncertainty in financial markets and may adversely affect the performance of the issuers to which a Portfolio has exposure.

On January 31, 2020, the United Kingdom (“UK”) formally withdrew from the EU (commonly referred to as “Brexit”) and entered a transition period during which the UK remained part of the EU single market and customs union, which concluded on December 31, 2020. The UK and EU have since entered into a trade agreement governing the new relationship with respect to trading goods and services. While the full impact of Brexit on the UK and Europe is unknown, the UK’s departure resulted in volatility in European and global markets. Potential negative long term effects could include, among others, greater market volatility and illiquidity, disruptions to securities markets, currency fluctuations, deterioration in economic activity, a decrease in business confidence, and an increased likelihood of a recession in the UK. The value of a Portfolio’s investments, particularly those investments with exposure to the European financial markets, may be negatively impacted by the foregoing developments. Any further exits from the EU, or the possibility of such exits, may have a significant impact on the UK, Europe, and global economies, which may result in increased volatility and illiquidity, new legal and regulatory uncertainties and potentially lower economic growth for such economies that could potentially have an adverse effect on the value of a Portfolio's investments. If one or more countries leave the EU or the EU dissolves, the world’s securities markets likely will be significantly disrupted.

Fund of Funds Investing. Each of the Active/Passive Balanced and Active/Passive Moderate Portfolios operate primarily as a “fund of funds” by investing in one or more of the equity and international portfolios, and one or more of the fixed income portfolios, of the Fund (each, an “Underlying Portfolio”), in addition to exchange-traded funds (“ETFs”), to gain exposure to the various components of its principal investment strategy. The ETFs are not portfolios of the Fund. The portfolios of the Fund that may serve as Underlying Portfolios include the following:

Equity Portfolios	International Portfolios
Growth Stock Portfolio	International Growth Portfolio
Focused Appreciation Portfolio	Research International Core Portfolio
Large Cap Core Stock Portfolio	International Equity Portfolio
Large Cap Blend Portfolio	Emerging Markets Equity Portfolio
Index 500 Stock Portfolio
Large Company Value Portfolio	Fixed Income Portfolios
Domestic Equity Portfolio	Government Money Market Portfolio

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Equity Income Portfolio	Short-Term Bond Portfolio
Mid Cap Growth Stock Portfolio	Select Bond Portfolio
Index 400 Stock Portfolio	Long-Term U.S. Government Bond Portfolio
Mid Cap Value Portfolio	Inflation Managed Portfolio
Small Cap Growth Stock Portfolio	High Yield Bond Portfolio
Index 600 Stock Portfolio	Multi-Sector Bond Portfolio
Small Cap Value Portfolio

The Adviser allocates the assets of the Active/Passive Balanced and Active/Passive Moderate Portfolios among the Underlying Portfolios and ETFs based on the Adviser’s economic and market outlook and the investment objectives and strategies of the Underlying Portfolios and ETFs. With respect to the equity and international Underlying Portfolios, the Adviser considers their investment focus on small, mid or large market capitalizations, domestic or foreign investments, whether the Underlying Portfolio is diversified or non-diversified and whether it employs a “growth” or “value” style of investing, among other characteristics. Under normal conditions, the equity portion of the strategy will be allocated to one or more actively managed equity and international Underlying Portfolios (or ETFs) and not to the Fund’s index portfolios: the Index 500 Stock, Index 400 Stock, and Index 600 Stock Portfolios. With respect to fixed income Underlying Portfolios, the Adviser considers their focus on investment grade or non-investment grade debt securities, domestic or foreign investments, whether the issuer is a government or government agency, the duration and maturity of the Underlying Portfolio or ETF, and other characteristics. The Adviser regularly reviews and adjusts the allocation among the Underlying Portfolios and ETFs to favor investments that the Adviser believes provide the most favorable position for achieving the Portfolio’s investment objective.

In connection with the allocation process, the Adviser may from time to time invest more than 25% of the assets of the Active/Passive Balanced Portfolio or the Active/Passive Moderate Portfolio in one Underlying Portfolio or one ETF.

Through its investments in the equity and international Underlying Portfolios and ETFs, the Active/Passive Balanced and Active/Passive Moderate Portfolios may be exposed to a wide range of equity securities and other instruments, including small, mid and large cap U.S. and non-U.S. stocks. Equity securities could include common and preferred stocks, securities convertible into stocks and depositary receipts for those securities. Through its investments in the fixed income Underlying Portfolios and ETFs, each Portfolio may be exposed to a wide range of fixed income securities with varying durations and maturities, including investment grade and non-investment grade debt securities, debt of corporate and government issuers, inflation-indexed debt securities, and other fixed income instruments. An Underlying Portfolio or ETF may invest a large percentage of its assets in a single issuer, security, market or sector (or limited group thereof) or in the case of an international Underlying Portfolio or international ETF, may invest in emerging markets, a small number of countries or a particular geographic region. An Underlying Portfolio or ETF

may also use certain derivative instruments including futures, forwards, options and swaps to meet their investment objective and for cash management purposes. For a discussion of equity securities, foreign securities (including emerging markets) and derivatives, see the corresponding headings above in this section of the Prospectus.

Risks of Fund of Funds Investing. To the extent that the Active/Passive Balanced or Active/Passive Moderate Portfolio invests in an Underlying Portfolio or ETF, the Portfolio indirectly bears all the risks associated with the investment strategies used by that Underlying Portfolio or ETF in direct proportion to the amount of assets the Portfolio allocates to that Underlying Portfolio or ETF, and bears a pro rata share of the Underlying Portfolio’s or ETF’s expenses in addition to its own expenses. A description of the principal investment strategies, the principal risks associated with those strategies, and expense information for each Underlying Portfolio is set forth in the “PORTFOLIO SUMMARIES” section at the beginning of this Prospectus. To the extent that the Portfolio invests a significant portion of its assets in a single Underlying Portfolio or single ETF, it will be particularly sensitive to the risks associated with that Underlying Portfolio or ETF, and changes in the value of that Underlying Portfolio or ETF may have a significant effect on the Portfolio’s net asset value. The performance of each such Portfolio is significantly impacted by the investment performance of the Underlying Portfolios and ETFs it holds. The ability of the Portfolio to meet its investment objective with respect to its fund of funds strategy is related to the ability of the Underlying Portfolios and ETFs to meet their respective investment objectives as well as the Adviser’s allocation decisions with respect to the Underlying Portfolios and ETFs. The Underlying Portfolios and ETFs will pursue their investment objectives and strategies without the approval of the Portfolios. If an Underlying Portfolio or ETF were to change its investment objective or strategies, a Portfolio may be forced to withdraw its investment from the Underlying Portfolio or ETF at a disadvantageous time. Because the Portfolios and the Underlying Portfolios are affiliated funds, the Portfolios are subject to risks associated with such affiliation. The Adviser will have the authority to select and allocate investments of the Portfolios among the Underlying Portfolios. The Adviser may be subject to potential conflicts of interest in selecting Underlying Portfolios because the fees paid to it by some Underlying Portfolios are higher than the fees paid by other Underlying Portfolios. Moreover, a situation could occur where proper action for a Portfolio could be adverse to the interest of the Underlying Portfolios or vice versa.

Underlying Portfolio Risks. The Underlying Portfolios are used as investments for the Active/Passive Balanced and Active/Passive Moderate Portfolios, and may have a large percentage of their shares owned by such Portfolios. Subject to the investment policies of the Active/Passive Balanced and Active/Passive Moderate Portfolios, there is no limit on the percentage of an Underlying Portfolio’s shares that may be owned by the Active/Passive Balanced and/or Active/Passive Moderate Portfolios and such ownership percentage may

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exceed a majority of an Underlying Portfolio’s shares. For information relating to ownership by the Active/Passive Balanced and Active/Passive Moderate Portfolios of each of the Underlying Portfolio’s shares, see “Appendix C – Ownership of Shares of the Fund” in the Fund’s Statement of Additional Information. Each Underlying Portfolio may experience large investments or redemptions from a Portfolio due to reallocation or rebalancing of the Portfolios. In the event of a large investment by a Portfolio, the Underlying Portfolio may be unable to quickly deploy the new funds in its strategy resulting in a larger cash position than typical for a period of time, which may cause the Portfolio to miss out on potential investment opportunities and gains if the market advances during that period. Large redemption activity by a Portfolio could result in the Underlying Portfolio being forced to sell portfolio securities at a loss to meet redemptions. Large redemptions by a Portfolio could also cause an Underlying Portfolio’s expense ratio to increase due to a resulting smaller asset base. Consequently, relatively large investments and redemptions by a Portfolio could adversely affect the performance of a Portfolios and the Underlying Portfolios. The Adviser may coordinate directly with the portfolio managers of the Underlying Portfolios to attempt to ensure that transactions are accommodated efficiently, including possibly implementing trades over a period of days rather than all at once. These practices may temporarily affect the Adviser’s ability to fully implement a Portfolio’s investment strategies. In addition, each Underlying Portfolio is subject to investment restrictions imposed by SEC Rule 12d1-4, which limits the Underlying Portfolio’s investments other funds to 10% of its total assets. For this purpose, funds include mutual funds, ETFs and other types of pooled investment vehicles like CLOs, CDOs, private mortgage REITS and other private securities relying on Sections 3(c)(1) or (7) of the Investment Company Act of 1940, as amended, to avoid registration. These restrictions may limit the ability of an Underlying Portfolio to fully pursue its investment strategy.

High Yield Bonds. The High Yield Bond Portfolio invests primarily in high yield debt securities as a principal investment strategy. The Multi-Sector Bond Portfolio may invest in high yield bonds as part of its principal investment strategy. The Fund considers a debt security to be “high yield,” or non-investment grade (sometimes referred to as “junk bonds”), if the debt security is rated below investment grade by at least two of the three credit ratings agencies used by the Fund (BB+ or lower by S&P; Ba1 or lower by Moody’s; BB+ or lower by Fitch), or if unrated, determined by the Portfolio’s Adviser or Sub-Adviser to be of comparable quality. See “Fixed Income Securities – Credit Risk”, above, for more information on the Fund’s use of credit ratings agencies.

Risks of Investing in High Yield Bonds. The historical financial condition of the issuers of these securities is usually not as strong as that of other issuers and the price of these securities is usually more volatile and more likely to react to developments affecting market and credit risk than are more highly rated securities. As a result, high yield debt securities are subject to greater levels of interest rate and credit risk and

greater risk of loss of income and principal than higher rated securities. Also, the trading markets for high yield debt securities tend to be less liquid than the trading markets for more highly rated securities and a Portfolio could find it more difficult to sell such securities or only sell at prices lower than more widely traded securities.

Illiquid Investments. Each Portfolio may invest up to 15% (5% for the Government Money Market Portfolio) of net assets in illiquid investments, which may include restricted securities, private placements by public and privately held entities and Rule 144A securities. An illiquid investment means any investment that the Fund reasonably expects cannot be sold or disposed of in current market conditions in seven calendar days or less without the sale or disposition significantly changing the market value of the investment, as determined pursuant to the provisions of Rule 22e-4. For example, some securities are not registered under U.S. securities laws and cannot be sold in a U.S. public offering because of SEC regulations (these are known as “restricted securities”). Under procedures adopted by the Fund’s Board of Directors, certain restricted securities may be deemed liquid, and will not be counted toward this 15% (or 5%, as applicable) limit.

Risks of Investing in Illiquid Securities. Investments in illiquid securities involve liquidity risk to the extent that a Portfolio may be unable to sell an illiquid security or sell at a reasonable price. This risk may be magnified during periods of economic turmoil or in an extended economic downturn. In addition, in order to sell a restricted security, a Portfolio might have to bear the expense and incur the delays associated with registering the shares with the SEC.

The value of a security on a given date depends entirely on its market price. Investors necessarily rely on the integrity of the marketplace. There is no guarantee that the securities markets will function in an orderly manner. High yield securities, foreign securities and securities with small capitalizations may be more thinly traded than other securities, which normally causes them to be less liquid and more difficult for a Portfolio to buy, sell and price such securities. In addition, during periods of extreme volatility or in an extended economic downturn, it may not be possible to liquidate positions at advantageous times or prices, which could have the effect of decreasing the overall level of a Portfolio’s liquidity. To the extent that a Portfolio’s principal investment strategies involve foreign securities, derivatives or securities with substantial market and/or credit risk, the Portfolio will tend to have a higher exposure to liquidity risk.

Indexed Investing. The Index 400 Stock, Index 500 Stock and Index 600 Stock Portfolios (the “Index Portfolios”) employ an indexing strategy as a principal investment strategy in an attempt to achieve their investment objectives. That is, they seek to replicate the performance of a target index by investing all, or substantially all of their assets in the stocks that make up the index, in approximately the same weighting as the index.

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Indexing Strategy Risk. The Index Portfolios use a passive management strategy, which is not “actively” managed, and therefore does not engage in shifting portfolio assets to take advantage of market opportunity, and does not attempt to manage market volatility, use defensive strategies or reduce the effects of any long-term periods of poor stock performance. Since the Index Portfolios implement a full replication strategy with respect to the particular index which they each track, to the extent the index has a significant allocation to an industry or group of industries, a particular sector, or to a single issuer or small number of issuers, the Index Portfolio will exhibit a significant investment level in that industry, group of industries, sector, issuer or small number of issuers. Portfolio performance may be adversely affected by a significant investment in an industry, group of industries, sector, issuer or small number of issuers, and may be more susceptible to adverse economic, market, political or regulatory developments affecting the industry, group of industries sector or issuer(s) subject to a significant level of investment.

Tracking Error Risk. The Index Portfolios may be subject to tracking error, which is the divergence of an Index Portfolio’s performance from that of the underlying index. Tracking error may occur because of differences between the securities and other instruments held in the Portfolio and those included in the underlying index, changes in the composition of the underlying index and the timing of rebalance transactions by the Portfolio, pricing differences (including, as applicable, differences between a security’s price at the local market close and the Portfolio’s valuation of a security at the time of calculation of the Portfolio’s net asset value), transaction costs incurred by the Portfolio, the Portfolio’s holding of uninvested cash, differences in timing of the accrual of or the valuation of dividends or interest, the requirements to maintain pass-through tax treatment, transactions carried out to minimize the distribution of capital gains to shareholders, the costs to the Portfolio of complying with various new or existing regulatory requirements and the timing of purchases and redemptions of Portfolio shares. Tracking error also may occur due to the Portfolio’s investment in futures and exchange traded funds, as the values of such investments may not correlate as intended with the underlying index. Tracking error risk may be heightened during times of increased market volatility or other unusual market conditions. Tracking error also may result because the Index Portfolio incurs fees and expenses, while the underlying index does not.

Inflation-Indexed Bonds. The Inflation Protection Portfolio invests in inflation-indexed bonds as a primary part of its principal investment strategies. Inflation-indexed bonds are fixed income securities whose principal value is periodically adjusted according to the rate of inflation. If the index measuring inflation falls, the principal value of inflation-indexed bonds will be adjusted downward, and consequently the interest payable on these securities (calculated with respect

to a smaller principal amount) will be reduced. Repayment of the original bond principal upon maturity (as adjusted for inflation) is guaranteed in the case of U.S. Treasury inflation-indexed bonds. For bonds that do not provide a similar guarantee, the adjusted principal value of the bond repaid at maturity may be less than the original principal.

Risks of Inflation-Indexed Bonds. The value of inflation-indexed bonds is expected to change in response to changes in real interest rates. Real interest rates are tied to the relationship between nominal interest rates and the rate of inflation. If nominal interest rates increase at a faster rate than inflation, real interest rates may rise, leading to a decrease in value of inflation-indexed bonds. Short-term increases in inflation may lead to a decline in value. Any increase in the principal amount of an inflation-indexed bond will be considered taxable ordinary income, even though investors do not receive their principal until maturity.

Investment Styles. Actively managed Portfolios may utilize a particular style of investing, such as “growth” or “value,” or a combination of both.

Investment Style Risk. Market performance tends to be cyclical, and during various cycles, the market may not favor the portion of the Portfolio that utilizes a particular style of investing, such as growth or value, and a Portfolio’s returns may vary considerably from other Portfolios or other funds using different investment styles. “Growth” stocks are typically priced higher than other stocks, in relation to earnings and other measures, because investors believe they have more appreciation potential. This potential may or may not be realized and growth stock prices tend to fluctuate more dramatically than the overall stock market. “Growth” stocks also may provide minimal dividends. “Value” stocks are typically those that the portfolio managers believe are undervalued in relation to their intrinsic values. The price of “value” stocks may turn out to have been too high, or the market may not recognize what the portfolio managers believe are their intrinsic values.

Leverage. Certain transactions in which the Portfolios engage may give rise to a form of leverage including, among others, swap agreements, futures contracts, and other derivative instruments (See, “Derivatives”, above), and the use of when issued, delayed delivery or forward commitment transactions (See, “When Issued, Delayed Delivery and Forward Commitment Transactions”, below) . To seek to mitigate leveraging risk, a Portfolio will segregate or “earmark” assets determined to be liquid by the Adviser or Sub-Adviser or otherwise cover its positions in a permissible manner.

Leverage Risk. The use of leverage may cause a Portfolio to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations. Leverage, including borrowing, may cause a Portfolio to be more volatile

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than if the Portfolio had not been leveraged because leverage tends to exaggerate the effect of any increase or decrease in the value of a Portfolio’s securities holdings.

Loans and Other Direct Debt Instruments. The Portfolios may invest in fixed- and floating-rate loans, including senior loans, and other direct debt instruments. In particular, the Multi-Sector Bond Portfolio invests in loans, including senior loans, as a principal investment strategy. Such investments generally will be in the form of loan participations and assignments of portions of such loans. Loan participations typically represent a direct investment, together with other parties, in a loan to a corporate borrower, and generally are offered by banks or other financial institutions or lending syndicates. The Portfolios may participate in such syndications, or may buy part of the loan, becoming a part lender. The Portfolios may invest in loan participations with credit quality comparable to that of issuers of its securities investments. Senior loans are syndicated commercial loans with floating interest rates, typically providing for a fixed spread above the three-month London Interbank Offered Rate. Such loans generally provide for the lenders to have a claim on underlying company assets which is senior to unsecured debt holders and preferred and common shareholders.

Loan Risk. To the extent the Fund invests in loans, it is exposed to risks associated with more traditional debt securities as well as additional risks. Loan participations and assignments involve credit risk, interest rate risk, liquidity risk, and the risks of being a lender. The Fund’s ability to receive payments in connection with the loan depends primarily on the financial condition of the corporate borrower and whether a loan is secured by collateral. Although some loans are secured by collateral, there is no assurance that the liquidation of collateral from a secured loan would satisfy the corporate borrower’s obligation, or that the collateral can be liquidated. When an interest in a direct debt instrument is acquired through purchasing loan participations, a Portfolio assumes the credit risk associated with the corporate borrower and may also assume the credit risk associated with the interposed bank or other financial intermediary. The loan participations in which a Portfolio invests may not be rated by any nationally recognized rating service. Indebtedness of companies whose creditworthiness is poor involves substantially greater risks, and may be highly speculative. Some companies may never pay off their indebtedness, or may pay only a small fraction of the amount owed. In the event of a bankruptcy of a corporate borrower, the Fund could experience delays or limitations in its ability to realize the benefits of any collateral securing a loan. All direct debt instruments involve a risk of loss in cases of default or insolvency of the borrower. Loans may decline in market value if their interest rates do not rise as much or as fast as interest rates in general. An economic downturn or individual corporate developments could adversely affect the market for loans and reduce the Fund’s ability to sell these instruments at an advantageous time or price. An economic downturn would generally lead to a higher non-payment rate, and the loan may lose significant market value before a default occurs. There is no organized exchange or board of trade on

which loans are traded and the market for loans has limited transparency. As such, the secondary market for loans may be comparatively limited relative to markets for other more liquid fixed income securities. Restrictions on transfers in loan agreements, a lack of publicly-available information, irregular trading activity and wide bid/ask spreads among other factors, may, in certain circumstances, make loans more difficult to sell at an advantageous time or price than other types of securities or instruments. Loans may also be subject to extension risk (the risk that borrowers will repay a loan more slowly in periods of rising interest rates) and prepayment risk (the risk that borrowers will repay a loan more quickly in periods of falling interest rates). In addition, loan investments may not be considered securities and may not have the protections afforded by the federal securities laws.

Senior Loan Risk. To the extent the Portfolios invest in senior loans, including bank loans, the Portfolios will be subject to the general risks associated with loans, and may be subject to enhanced levels of credit risk, call risk, settlement risk and liquidity risk. These instruments are considered predominantly speculative with respect to an issuer’s continuing ability to make principal and interest payments and such loans are rated below investment grade. Senior loans may be more volatile than other types of loans and direct debt instruments. The market for senior loans is generally considered illiquid. As a result of the foregoing risks and related factors, a Portfolio may be unable to realize full value for the senior loans and/or may not receive the proceeds from a sale of a senior loan for an extended period after such sale, each of which could result in losses to a Portfolio. Senior loans may have extended trade settlement periods, including settlement periods of greater than 7 days, which may result in cash not being immediately available to a Portfolio. If an issuer of a senior loan prepays or redeems the loan prior to maturity, a Portfolio may have to reinvest the proceeds in other senior loans or similar instruments that pay lower interest rates. Senior loans that are considered to be “covenant-lite” offer less protection to the loan holder and may have increased credit risk and call risk. Covenant-lite senior loans may also be subject to heightened liquidity risk. Because of the risks involved in investing in senior loans, an investment in a Portfolio that invests in such instruments should be considered speculative.

Mortgage Related and Other Asset-Backed Securities. Each Portfolio may invest in mortgage- and asset-backed securities. In particular, the Short-Term Bond, Select Bond, Long-Term U.S. Government Bond, Inflation Protection, Multi-Sector Bond, Active/Passive Balanced and Active/Passive Moderate Portfolios may invest in mortgage- and asset-backed securities as a principal investment strategy. An asset-backed security is a fixed income security that derives its credit worthiness from cash flows relating to a pool of assets. There are a number of different types of asset-backed securities, including mortgage-backed securities, securities backed by other pools of collateral (such as automobile loans, credit card receivables and home equity loans), collateralized mortgage obligations and collateralized debt obligations. Mortgage-backed securities are asset-backed securities backed by pools of residential and

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commercial mortgages, which may include sub-prime mortgages. Mortgage related securities include mortgage pass-through securities, collateralized mortgage obligations (“CMOs”), commercial mortgage-backed securities, mortgage dollar rolls, to-be-announced (“TBA”) mortgage-backed securities, specified pools of forward settling mortgage-backed securities, CMO residuals stripped mortgage-backed securities (“SMBSs”) and other securities that directly or indirectly represent a participation in, or are secured by and payable from, mortgage loans on real property.

Risks of Mortgage- and Asset-Backed Securities. The value of some mortgage- or asset-backed securities may be particularly sensitive to changes in prevailing interest rates. Early repayment of principal on some mortgage related securities may expose a Portfolio to a lower rate of return upon reinvestment of principal. When interest rates rise, the value of a mortgage related security generally will decline; however, when interest rates are declining, the value of mortgage related securities with prepayment features may not increase as much as other fixed income securities. The rate of prepayments on underlying mortgages will affect the price and volatility of a mortgage related security, and may shorten or extend the effective maturity of the security beyond what was anticipated at the time of purchase. If unanticipated rates of prepayment on underlying mortgages increase the effective maturity of a mortgage related security, the volatility of the security can be expected to increase. The value of these securities may fluctuate in response to the market’s perception of the creditworthiness of the issuers. Additionally, although mortgages and mortgage related securities are generally supported by some form of government or private guarantee and/or insurance, there is no assurance that private guarantors or insurers will meet their obligations.

Mortgage- and asset-backed securities are subject to prepayment risk. When borrowers refinance their mortgages to take advantage of declining interest rates, their existing mortgages are prepaid. The mortgages, which back the mortgage-backed securities purchased by a Portfolio, may be prepaid in this fashion. Likewise, borrowers may prepay the credit card or automobile trade receivables, home equity loans, corporate loans or bonds or other assets underlying a Portfolio’s asset-backed securities. When this happens, a Portfolio will be required to purchase new securities at current rates, which will usually be lower. Because of this prepayment risk, a Portfolio investing in mortgage- and asset-backed securities may benefit less from declining interest rates than other funds. Mortgage risk is the risk that in a period of rising interest rates, mortgage related securities may exhibit additional volatility, which may increase the volatility of a Portfolio’s share price. In addition, in some places, local governments may seek to use their eminent domain powers to buy underwater home loans held by mortgage-backed securities. The price of the loans purchased in such cases may be made at a discount to the loan’s true value.

Mortgage- and asset-backed securities are also subject to varying degrees of credit risk, depending on whether they are issued by agencies or instrumentalities of the U.S. government

(including those whose securities are neither guaranteed nor issued by the U.S. government) or by non-governmental issuers. Mortgage-backed securities offered by non-governmental issuers are subject to specific risks, such as the failure of private insurers to meet their obligations and unexpectedly high rates of defaults on the mortgages backing the securities. Although there is generally a liquid market for these investments, those securities issued by private organizations may not be readily marketable. Mortgage-backed securities are subject to the risk of loss of principal if the obligors of the underlying obligations default in their payment obligations. The risk of defaults associated with mortgage-backed securities is generally higher in the case of mortgage-backed investments that include sub-prime mortgages. Asset-backed securities may be subject to risks similar to those associated with mortgage-backed securities, as well as risks associated with the nature and servicing of the assets underlying the securities. Asset-backed securities may not have the benefit of a security interest in collateral comparable to that of mortgage assets, resulting in additional credit risk.

Municipal Securities. One type of debt security in which the Portfolios may invest are municipal securities. The Multi-Sector Bond Portfolio may invest in municipal securities as a principal investment strategy. Municipal debt securities include general obligation bonds of municipalities, local or state governments, project or revenue-specific bonds, or pre-refunded or escrowed bonds, including hybrids and synthetic securities. Municipal securities are issued to raise money for a variety of public and private purposes, including general financing for state and local governments, or financing for a specific project or public facility. Municipal securities may be backed by the local government, by the credit of a private issuer, by the current or anticipated revenues from a specific project or specific assets, or by domestic or foreign entities providing credit support such as letters of credit, guarantees or insurance.

Risks of Investing in Municipal Securities. Municipal securities can be significantly affected by political changes as well as uncertainties in the municipal markets relating to taxation, legislative changes, or the rights of municipal security holders. Because many municipal securities are issued to finance similar projects, especially those related to education, health care, transportation and utilities, conditions in those sectors can affect the overall municipal market. In addition, changes in the overall financial condition of an individual municipal issuer can affect the overall municipal market. Municipal securities backed by current or anticipated revenues from a specific project or specific assets can be negatively affected by the discontinuance of the taxation supporting the project or assets or the inability to collect revenues for the project or from the assets. If the Internal Revenue Service determines that an issuer of a municipal security has not complied with applicable tax requirements, interest from the security could become taxable and the security could decline significantly in value.

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Each Portfolio may also invest in municipal bonds issued pursuant to the American Recovery and Reinvestment Act of 2009 (the “Act”), which provides for the issuance of taxable municipal debt on which the issuer receives federal support of the interest paid (“Build America Bonds”). The Act authorizes state and local governments who issue Build America Bonds to elect to either (i) receive a direct payment from the federal government equal to 35% of the interest costs; or (ii) provide federal tax credits to investors in the bonds equal to 35% of the coupon interest received. The federal interest subsidy or tax credit benefit continues for the life of the bonds. Unlike most other municipal bonds, interest received on Build America Bonds is subject to federal taxation. Issuance of Build America Bonds ended on December 31, 2010.

Build America Bonds are subject to the same types of risks as other municipal bonds. Build America Bonds are not issued or guaranteed by the U.S. Treasury and the government subsidy does not enhance the issuer’s creditworthiness. The credit of the bond is backed by the municipality issuing the bond, not the federal government. In addition, if the issuer fails to continue to meet the applicable requirements of the Act, it is possible that the issuer may not continue to receive the federal subsidy, thereby impairing the issuer’s ability to make payments on the bond. Some Build America Bonds have been issued with provisions that allow state and local governments to “call” the bonds back if the federal government stops paying a subsidy on the interest.

Federal legislation passed in 2011 to raise the federal debt ceiling included a provision referred to as “sequestration,” which provides for automatic federal spending cuts in the absence certain other Congressional action to address the federal budget deficit, beginning on March 1, 2013. Under the sequestration provision, the federal subsidy payments to issuers of Build America Bonds have been reduced. The U.S. Congress has continued to extend the period for sequestration, and it was most recently extended through 2029 by the Bipartisan Budget Act of 2019. Since the subsidy cuts began, some municipalities have called or announced plans to call Build America Bonds from investors. Reductions to the subsidy may increase the risk that issuers of Build America Bonds may call the bonds back, as noted above, and increases the risk that issuers may be unable to meet all or part of their payment obligations.

Real Estate Investment Trusts (REITs). The Active/Passive Moderate, Active/Passive Balanced, Focused Appreciation, Large Cap Core Stock, Large Cap Blend, Equity Income, Mid Cap Growth Stock, Mid Cap Value, Small Cap Growth Stock and Small Cap Value Portfolios, may invest in real estate investment trusts, or REITs, as a principal investment strategy, while the other Portfolios may invest in REITs as a non-principal investment strategy. REITs are pooled investment vehicles that typically invest directly in real estate, mortgages and loans collateralized by real estate, or in a combination of the two. “Equity” REITs invest primarily in real estate that produces income from rentals. “Mortgage” REITs invest primarily in mortgages and derive their income from interest payments. REITs usually specialize in a particular type of

property and may concentrate their investments in particular geographical areas. Investments in REITs may provide the Portfolio with an efficient, low-cost means of diversifying among various types of property in different regions.

Risks of Investing in REITs. Investments in REITs are subject to the types of risks associated with investing in the real estate industry, including, among other risks: adverse developments affecting the real estate industry; declines in real property values; changes in interest rates; defaults by mortgagors or other borrowers and tenants; lack of availability of mortgage funds or financing; extended vacancies of properties, especially during economic downturns; casualty or condemnation losses; property taxes and operating losses; and governmental actions, such as changes to tax laws, zoning regulations or environmental regulations. REITs are dependent upon the quality of their management, may have limited financial resources and heavy cash flow dependency, may not be diversified geographically or by property type, and may be subject to self-liquidation. Because REITs are pooled investment vehicles that have their own expenses, the Portfolio will indirectly bear its proportionate share of those expenses. REITs are subject to the risk of failing to maintain their exemptions from registration as investment companies under the Investment Company Act of 1940, as amended,, and the possibility of failing to satisfy specific requirements under the Internal Revenue Code of 1986, as amended (the “Code”) that allow REITs to pass through income to shareholders without paying tax at the entity level.

Repurchase Agreements. The Government Money Market Portfolio may enter into repurchase agreements as a principal investment strategy, and each other Portfolio may enter into repurchase agreements as a non-principal investment strategy. When a Portfolio enters into a repurchase agreement, the Portfolio purchases a security from a bank or broker-dealer who agrees to repurchase the security at the Portfolio’s cost plus interest within a specified time. The other party to a repurchase agreement may be located inside or outside of the U.S. The Government Money Market Portfolio may invest 100% of its assets in repurchase agreements that are fully collateralized by U.S. government securities.

Repurchase Agreements Risk. If the party agreeing to repurchase should default, the Portfolio will seek to sell the securities which it holds. This could involve procedural costs or delays in addition to a loss on the securities if their value should fall below their repurchase price. If the other party to a repurchase agreement is located outside of the U.S., these risks may be heightened. Repurchase agreements maturing in more than seven days are considered illiquid securities.

Sector Focus. At times, a Portfolio may have a relatively high percentage of its assets invested in securities of companies conducting business in a particular sector. Among the Portfolios that may from time to time exhibit an elevated level of investment in a particular sector are the following: the Growth Stock, Focused Appreciation, Large Cap Core Stock, Large Cap Blend, Large Company Value, Equity Income, Mid

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Cap Growth Stock, Small Cap Growth Stock, Small Cap Value, Mid Cap Value, International Growth, Research International Core, International Equity, Emerging Markets Equity, Domestic Equity, Active/Passive Balanced and Active/Passive Moderate Portfolios. Dependent on a number of factors, including the implementation of an investment strategy by a Portfolio, changing market and economic conditions, and adjustments or modifications to a Portfolio’s benchmark index, other Portfolios may have an elevated level of investment in a particular sector at any point in time. (The Index 500 Stock Portfolio may have a heightened level of investment in a particular sector due to the composition of the benchmark index with which it aligns.)

Sector Focus Risk. To the extent the Portfolio invests a relatively high percentage of its assets in a particular sector, it will have greater exposure to the risks associated with that sector, including the risk that the securities of companies within the sector will underperform due to adverse economic conditions, regulatory or legislative changes, or increased competition affecting the sector. To the extent the Portfolio is underweight in other sectors, the Portfolio risks missing out on advances in those sectors.

When a Portfolio has an elevated level of investment in a particular sector, there may be specific risks associated with companies that belong to that economic sector. Portfolios with an elevated level of investment in the following sectors may be subject to the risks associated with the particular sector as described below:

Information Technology Sector Risks. Companies in the information technology sector can be adversely affected by intense competition, both domestically and internationally, which may impact their profit margins. Information technology companies may have limited product lines, markets, financial resources, or personnel. The products of information technology companies may face obsolescence due to rapid technological developments, frequent new product introduction, unpredictable changes in growth rates, competition for the services of qualified personnel, and changing consumer preferences. Companies in the information technology sector are heavily dependent on patent and intellectual property rights. The loss or impairment of these rights may adversely affect the profitability of these companies.

Certain of the largest information technology companies, including Facebook, Google, Amazon and Apple, have been subject to increased scrutiny regarding the use and handling of data collected from individuals utilizing their services and standards applicable to online content. They have also been targeted for investigation concerning potential anticompetitive conduct. Concern regarding the data practices employed by these companies has prompted the European Commission to evaluate compliance with its General Data Protection Regulation, which adopted strict privacy controls in Europe in 2018. The European Parliament and EU member states recently agreed upon the Digital Services Act, which addresses illegal and harmful content on social media platforms. The Act sets

out standards for illegal content, with an accompany requirement for removal of such content, imposes a ban on targeted advertising aimed at children, and establishes obligations for the vetting of third-party sellers. Draft legislation has been introduced in the U.S. House of Representatives Energy and Commerce Committee, which oversees online privacy issues, which could diminish the ability of companies like Google and Facebook to monitor users across the internet and require them to get permission to share their customers’ data with others, among other restrictions. Review of potential anticompetitive conduct is occurring on multiple fronts, including an investigation by the U.S. House of Representatives Antitrust Subcommittee into potential abusive conduct in the information technology sector, the conduct of antitrust probes by the U.S. Federal Trade Commission and U.S. Department of Justice, and the opening of antitrust investigations by state attorneys general from multiple U.S. states. The Judiciary Committee of the U.S. Senate recently approved legislation (the American Innovation and Choice Online Act) which would make it illegal for the largest internet platforms to unfairly favor their own products and services over those of other businesses that use the platform. The foregoing activities, although targeted principally on a focused group of the largest companies within the sector, may have far-reaching ramifications which may be significantly impactful across the information technology sector.

Financials Sector Risks. Performance of companies in the financials sector may be adversely impacted by many factors, including, among others, government regulations, economic conditions, credit rating downgrades, changes in interest rates, and decreased liquidity in credit markets. The potential for additional regulation could reduce profit margins and adversely affect the scope of activities of such companies, increase the amount of capital they must maintain, and limit the amounts and types of loans and other financial commitments they can make. In addition, companies in the financials sector may also be negatively impacted by decreases in the availability of capital, increased borrowing costs, the rate of debt defaults, increased competition and adverse conditions in other related markets.

Healthcare Sector Risks. The profitability of healthcare companies may be adversely affected by extensive government regulations, restrictions on government reimbursement for medical expenses, rising costs of medical products and services, pricing pressure, an increased emphasis on outpatient services, a limited number of products, industry innovation, changes in technologies and other market developments. Many healthcare companies are heavily dependent on patent protection. The expiration of a company’s patents may adversely affect that company’s profitability. Many healthcare companies are subject to litigation based on product liability and similar claims. Healthcare companies are subject to competitive forces that may make it difficult to raise prices and, in fact, may result in price discounting. Many new products in the healthcare sector are subject to regulatory approval

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requirements. The process of obtaining such approvals may be long and costly, and such efforts ultimately may be unsuccessful. Companies in the healthcare sector may be thinly capitalized and may be susceptible to product obsolescence.

Industrials Sector Risks. Companies in the industrials sector may be affected by a number of economic factors, including global economic growth trends and the state of global manufacturing. Companies may be challenged by a tight labor market, which may result in difficulties filling critical jobs, which can serve as a constraint on growth. Companies in the sector may be impacted by geopolitical tensions, and trade arrangements among significant trade partners, such as the U.S. and China. The imposition of tariffs and the related impact on trading can threaten profitability, and uncertainty arising from changing trade agreements can affect trade flows and capital and resource planning. Such factors can lower management confidence in capital spending, which can negatively affect revenue growth. The sector has significant exposure to emerging markets, and is affected by capital goods and services demand fluctuations as may occur in emerging market countries.

Communication Services Sector Risks. Industries within this sector include telecommunication services (diversified and wireless), media, entertainment, and interactive media and services. Companies in the communication services sector can be significantly affected by government regulation, intense competition, rapid changes in technology, and changes in consumer and business spending and preferences. From the standpoint of regulation, recent developments include a significant focus on antitrust concerns, which creates potential risk for search engine and social media companies in this sector. Recent more restrictive privacy laws and requirements have also been an area of focus for regulators, impacting the manner in which companies may use and rely upon consumer data. Operational risk may be heightened due to economic and market environmental factors. Individual industry groups and companies in the sector may be affected by the commoditization of key service offerings, such as streaming and cellular phone service, where significant competition and pricing sensitivity can diminish customer loyalty and result in frequent turnover of providers.

Consumer Discretionary Sector Risk. The consumer discretionary sector may be affected by changes in domestic and international economies, exchange and interest rates, competition, consumers’ disposable income and consumer preferences, social trends and marketing campaigns. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall global economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Also, companies in the consumer discretionary sector may be subject to severe competition, which may have an adverse impact on their respective profitability. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products and services in the marketplace.

Securities of Other Investment Companies. The Portfolios may acquire securities of other investment companies, including exchange-traded funds and business development companies, subject to the limitations of the Investment Company Act of 1940, as amended. The Small Cap Value Portfolio may invest in a variety of investment companies as part of its principal investment strategies. As a shareholder of another investment company, a Portfolio would bear, along with other shareholders, its pro rata portion of the other investment company’s expenses, including advisory expenses. These indirect expenses would be in addition to the management fee that each Portfolio bears directly in connection with its own operations. The expenses associated with business development companies in particular may be significant. Fees and expenses incurred indirectly by a Portfolio as a result of its investing in investment companies, business development companies and other pooled investment vehicles are reflected in a Portfolio’s fee and expense table in “Other Expenses,” if the indirect expenses incurred by the Portfolio do not exceed 0.01% (one basis point) of the Portfolio’s average net assets or in a separate line item called “Acquired Fund Fees and Expenses,” if such amount exceeds 0.01% of the Portfolio’s average net assets.

Each Portfolio may invest in exchange traded funds (ETFs), such as Standard & Poor’s Depositary Receipts (SPDRs), with the same percentage limitations as investments in registered investment companies. Portfolios that may invest in ETFs as part of their principal investment strategies include the Small Cap Growth Stock, Index 500 Stock, Index 400 Stock, Index 600 Stock, Small Cap Value, Active/Passive Balanced and Active/Passive Moderate Portfolios. ETFs are a type of fund bought and sold on a securities exchange. An ETF trades like common stock and usually represents a fixed portfolio of securities designed to track the performance and dividend yield of a particular domestic or foreign market index. A Portfolio may purchase an ETF to temporarily gain exposure to a portion of the U.S. or foreign market while awaiting the purchase of underlying securities. The Active/Passive Balanced and Active/Passive Moderate Portfolios may purchase ultra-short bond ETFs in order to enhance short duration returns. The Portfolios may rely on Rule 12d1-4 under the Investment Company Act of 1940, as amended that permits funds meeting various conditions to invest in ETFs in amounts exceeding limits set forth in Section 12(d) of the Investment Company Act of 1940, as amended, that would otherwise be applicable.

Each Portfolio may invest in business development companies (BDCs). The Small Cap Value Portfolio may invest in BDCs as part of its principal investment strategies. BDCs are a type of registered investment company that typically invests in and lends to small and medium-sized private companies that may not have access to public equity markets for raising capital. Some BDCs may also be invested in a relatively small number of holdings or concentrate in a particular industry or sector.

Risks of Investing in Securities of Other Investment Companies. As with other investments, investments in other investment companies are subject to market and selection risks. Registered investment companies and unregistered investment

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companies generally entail the same risks as the underlying securities held by them. A Portfolio investing in another investment company may be affected by the losses of the underlying funds and the level of risk arising from the investment practices of the underlying funds.

Risks of Investing in ETFs. The main risk of investing in an index based investment is the same as investing in a portfolio of equity securities comprising the index, although lack of liquidity in an ETF could result in it being more volatile. As a shareholder of another investment company, a Portfolio investing in ETFs would bear its pro rata portion of the other investment company’s expenses, including advisory fees, in addition to the expenses the Portfolio bears directly in connection with its own operation. The market prices of index based investments will fluctuate in accordance with both changes in the market value of their underlying portfolio securities and due to supply and demand for the instruments on the exchanges on which they are traded, which may result in their trading at a discount or premium to their net asset values. A Portfolio will overpay for the ETF’s assets if it is trading at a premium and will get less than the value of the ETF’s assets are selling if it is trading at a discount. Index based investments may not replicate exactly the performance of their specific index because of transaction costs and because of the temporary unavailability of certain component securities of the index. An active market for an ETF may not be developed or maintained. Furthermore, trading of an ETF’s shares may be halted by the exchange on which the ETF is listed, in which case a Portfolio would be unable to sell its shares of the ETF unless and until trading is resumed. To the extent that authorized participants do not place sufficient creation and redemption orders, an ETF's shares may trade at a premium or discount or may face a trading halt or delisting. Investments in ultra-short bond ETFs may pose greater risk than investment in cash equivalents such as money market mutual funds, including risks associated with credit quality, duration and interest rate sensitivity of the bond instruments held within such ETFs. Ultra-short bond ETFs may be volatile and involve greater credit and interest rate risk than money market funds and other cash equivalents. The price of an ultra-short bond ETF may fluctuate, while the goal of a money market mutual fund is to maintain its NAV at a stable $1 per share. Ultra-short bond ETFs may lose money despite a stated investment objective of returning capital. The risk profile of ultra-short bond ETFs is affected by the strategy of such ETFs to seek to produce higher yields as well as environmental risks that affect bond holdings generally, including interest rate movements.

Risks of Investing in BDCs. Like investments in other types of investment companies, a Portfolio that invests in BDCs would bear its pro rata portion of the BDC’s expenses; the expenses associated with some BDCs may be significant. A BDC is subject to the risks inherent in investing in smaller companies, including that portfolio companies may be dependent on a small number of products or services and may be more adversely affected by poor economic or market conditions. Investments in such small companies may also be less liquid than publicly traded companies. To the extent BDCs

have a relatively small number of holdings or concentrate in a particular industry or sector, the BDC is particularly subject to the risks associated with those holdings, industries and sectors, which may also increase the BDC’s volatility and risk. Shares of a BDC may not be redeemable at the option of shareholders and therefore may trade at a discount or premium to its net asset value, which means the Portfolio will overpay for an BDC’s assets if it is trading at a premium and will get less than the value of the BDC’s assets when selling if it is trading at a discount. An active market for a BDC may not be developed or maintained.

Short Sales. Each Portfolio may make short sales as part of its overall portfolio management strategies or to offset a potential decline in value of a security. In particular, the Long-Term U.S. Government Bond Portfolio and the Multi-Sector Bond Portfolio may engage in short sales as part of their principal investment strategies. A short sale involves the sale of a security that is borrowed from a broker or other institution to complete the sale. A Portfolio may also enter into a short derivative position through a futures contract or swap agreement.

Risks of Short Sales. Short sales expose a Portfolio to the risk that it will be required to acquire, convert or exchange securities to replace the borrowed securities (also known as “covering” the short position) at a time when the securities or derivative sold short have appreciated in value, thus resulting in a loss to the Portfolio. A Portfolio making a short sale may segregate or “earmark” assets determined to be liquid by the Adviser or Sub-Adviser or otherwise cover its position in a permissible manner.

Special Situations. The Equity Income and Small Cap Value Portfolios may invest in special situations as a primary investment strategy. A “special situation” arises when, in the Adviser or Sub-Adviser’s opinion, securities of a particular company will appreciate in value because of unique circumstances applicable to the company, such as when a company goes through a reorganization, does a spin-off of another business line, declares a special dividend or some other one-time event that might be attractive from an investment perspective.

Risks of Special Situations. Investing in special situations involves the risk that the change or event anticipated by management might not occur or attract the expected attention, which could have a negative impact on the price of the issuer’s securities. Also, special situations have risk because they may be associated with major corporate changes and present a high degree of uncertainty as to a security’s market price. Investing in special situations may involve heightened volatility in the value of the securities purchased and may cause greater risk of loss than investments in securities not subject to a special situation.

Stable Net Asset Value. The Government Money Market Portfolio operates as a “government money market fund” under Rule 2a-7 of the Investment Company Act of 1940, as amended. As a government money market fund, the Portfolio

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seeks to maintain a net asset value (“NAV”) of $1.00 per share, and is required to, among other things, invest at least 99.5% of its total assets in U.S. Government Securities, cash, and repurchase agreements securities by U.S. Government Securities or cash. See “Government Money Market Portfolio—Summary” under the “PORTFOLIO SUMMARIES” section at the beginning of this Prospectus and the “U.S. Government Securities” section, below.

Stable Net Asset Value Risk. The Government Money Market Portfolio may not be able to maintain a stable NAV of $1.00 per share at all times. If the Portfolio fails to maintain a stable NAV (or there is a perceived threat of such failure), the Portfolio, along with other money market funds, could be subject to increased redemption activity. In 2023, the SEC adopted new regulations governing how money market funds may operate when interest rates are negative. Should a negative interest rate scenario occur in future periods and cause the Government Money Market Portfolio to have negative gross yield, the Portfolio has the flexibility under the final rules to use a floating NAV or engage in share cancellation (via a reverse distribution mechanism (“RDM”)) if the Board determines either course is in the best interests of the Portfolio. If the Portfolio converts to a floating NAV in a negative interest rate environment, the Portfolio’s losses will be reflected through a declining share price. If the Portfolio uses share cancellation, the Portfolio will maintain a stable share price, despite losing value, by reducing the number of its outstanding shares. If it is anticipated that the Portfolio will convert to a floating NAV or engage in share cancellation, the Portfolio will reassess its disclosures to ensure that such disclosures adequately describe the consequences, including specifically tax consequences, to shareholders.

U.S. Government Securities. The Government Money Market, Short-Term Bond, Select Bond, Long-Term U.S. Government Bond, Inflation Protection, Multi-Sector Bond, Active/Passive Balanced and Active/Passive Moderate Portfolios may invest in U.S. government securities as a principal investment strategy. U.S. government securities include direct obligations of the U.S. government, including U.S. Treasury bonds, bills, notes, and other obligations, and those issued or guaranteed by various U.S. government agencies and instrumentalities, including government sponsored enterprises. U.S. Treasury obligations are guaranteed as to the timely payment of interest and principal when held to maturity, but the market prices for such securities are not guaranteed and will fluctuate. Obligations issued or guaranteed by U.S. government agencies or instrumentalities may not be guaranteed by the U.S. Treasury or otherwise backed by the full faith and credit of the U.S. government. For example, the Government National Mortgage Association (“GNMA”), a wholly owned U.S. Government corporation, is authorized to guarantee, with the full faith and credit of the U.S. government, the timely payment of principal and interest on securities issued by institutions approved by GNMA and backed by pools of mortgages insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs. Government-related guarantors (i.e., not backed by the full faith and credit of the U.S.

Government) include the Federal National Mortgage Association (“FNMA”) and the Federal Home Loan Mortgage Corporation (“FHLMC”). Securities issued by FNMA are guaranteed as to timely payment of principal and interest by FNMA but are not backed by the full faith and credit of the U.S. Government. FHLMC guarantees the timely payment of interest and ultimate collection of principal, but its participation certificates are not backed by the full faith and credit of the U.S. government. U.S. government agency obligations also include, but are not limited to, those of the Student Loan Marketing Association, Federal Home Loan Banks, Federal Intermediate Credit Banks, Tennessee Valley Authority, and Federal Farm Credit Banks.

U.S. Government Securities Risk. As indicated above, not all obligations of the U.S. government, its agencies and instrumentalities are backed by the full faith and credit of the U.S. Treasury. Some obligations are backed only by the credit of the issuing agency or instrumentality, and in some cases there may be some risk of default by the issuer. Any guarantee by the U.S. government or its agencies or instrumentalities of a security held by the Portfolio does not apply to the market value of such security or to shares of the Portfolio itself. No assurance can be given that the U.S. government would provide financial support to any U.S. government agency or instrumentality if it is not obligated to do so by law.

Special Considerations. On September 7, 2008, FNMA and FHLMC were placed under the conservatorship of the Federal Housing Finance Agency (FHFA) to provide stability in the financial markets, mortgage availability and taxpayer protection by preserving FNMA and FHLMC’s assets and property and putting FNMA and FHLMC in a sound and solvent condition. Under the conservatorship, the U.S. Treasury received senior preferred equity shares and warrants as a means to provide access for FNMA and FHLMC to significant financial support. Also at that time, the U.S. Treasury instituted a secured lending credit facility, available to FNMA and FHLMC to assist the entities in funding their regular business activities in the capital markets. In October 2019, the FHFA issued a Strategic Plan which outlines an end-state vision for FNMA and FHLMC to return to operating as fully-private companies within a competitive, liquid, efficient, and resilient housing finance system. The Strategic Plan articulates the commitment of FHFA that it will ensure that FNMA and FHLMC have the capital reserves, risk management capabilities, corporate governance, and regulatory oversight that are appropriate for their size, risk, and systematic importance outside of conservatorship. The FHFA advises that the attainment of the goal of ending the conservatorships is subject to achieving significant changes on multiple fronts, including changes to the housing finance market, changes in the scope of regulatory and supervisory authority accorded FHFA in a post-conservatorship environment, and changes in the operation of both FNMA and FHLMC, including particularly changes in business models which will facilitate the maintenance of capital levels that will prudently support business risk levels. While the FHFA has articulated the end-state vision which would permit FNMA and FHLMC to exit

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conservatorship, achievement of this goal, the projected timeline within which such goal can be accomplished, and the ultimate terms under which such conservatorships may end, is uncertain.

Variable and Floating Rate Securities. Variable and floating rate securities provide for a periodic adjustment in the interest rate paid on the obligations. Each Portfolio may invest in floating rate debt instruments (“floaters”) and engage in credit spread trades. Each Portfolio may also invest in inverse floating rate debt instruments (“inverse floaters”). The Fixed Income Portfolios, and in particular, the Government Money Market Portfolio, may invest in variable and floating rate securities as part of their principal investment strategies.

Risks of Variable and Floating Rate Securities. While floaters provide a certain degree of protection against rises in interest rates, a Portfolio will participate in any declines in interest rates as well. An inverse floater may exhibit greater price volatility than a fixed rate obligation of similar credit quality. In addition, the absence of an active market for these securities could make it difficult for a Portfolio to dispose of them if the issuer defaults.

When Issued, Delayed Delivery and Forward Commitment Transactions. Each Portfolio may purchase securities which it is eligible to purchase on a when issued basis, may purchase and sell such for delayed delivery and make contracts to purchase such securities for a fixed price at a future date beyond normal settlement time (forward commitments). In particular, the Government Money Market, Long-Term U.S. Government Bond and Multi-Sector Bond Portfolios may make such investments as part of their principal investment strategies.

Risks of When Issued, Delayed Delivery and Forward Commitment Transactions. When issued transactions, delayed delivery purchases and forward commitments involve a risk of loss if the value of the securities declines prior to the settlement date. This risk is in addition to the risk that the Portfolio’s other assets will decline in value. Therefore, these transactions may result in a form of leverage and increase a Portfolio’s overall investment exposure. Typically, no income accrues on securities a Portfolio has committed to purchase prior to the time delivery of the securities is made, although a Portfolio may earn income on securities it has segregated or “earmarked” to cover these positions.

Non-Principal Investment Strategies and Risks

Commodities. Certain of the Portfolios may invest in instruments, including exchange traded funds, whose performance is linked to the price of an underlying commodity or commodity index as a non-principal investment strategy. To the extent a Portfolio makes such investments, the Portfolio may be subject to the risks of investing in physical commodities. These types of risks include regulatory, economic and political developments, weather events, and natural disasters, pestilence and market disruption. Commodity prices may have greater volatility than investments in traditional securities.

Delayed Funding Loans and Revolving Credit Facilities. The Portfolios may also enter into, or acquire participations in, delayed funding loans and revolving credit facilities, in which a lender agrees to make loans up to a maximum amount upon demand by the borrower during a specified term. The commitments may have the effect of requiring a Portfolio to increase its investment in a company at a time when it might not otherwise decide to do so (including at a time when the company’s financial condition makes it unlikely that such amounts will be repaid). To the extent that a Portfolio is committed to advance additional funds, it may segregate or “earmark” assets determined to be liquid by the Adviser or Sub-Adviser in an amount sufficient to meet such commitments. Delayed funding loans and revolving credit facilities are subject to credit, interest rate and liquidity risk and the risks of being a lender.

Master Limited Partnerships. The Portfolios may invest in master limited partnerships (“MLPs”). MLPs are limited partnerships whose limited partnership interests (units) are traded on a public exchange. As a result, MLP units are generally more liquid than units of private limited partnerships. MLPs have two types of partners – one or more general partners that conduct the day-to-day management of the MLP, and one or more limited partners that contribute capital but are not involved in the day-to-day management. When a Portfolio invests in a MLP, it becomes a limited partner. Limited partners have limited control over the MLP and may have limited voting rights on matters affecting the MLP. There may be fewer corporate protections afforded investors in an MLP than investors in a corporation. Conflicts of interest may exist among unit holders, subordinated unit holders and the general partner of an MLP, including those arising from incentive distribution payments. MLPs that concentrate in a particular industry or region are subject to risks associated with such industry or region. MLPs holding credit-related investments are subject to interest rate risk and the risk of default on payment obligations by debt issuers. Investments held by MLPs may be illiquid. MLP units may trade infrequently and in limited volume, and they may be subject to abrupt or erratic price movements. MLPs typically pay higher distributions than other types of companies. The amount of cash a MLP can distribute to its partners will depend on the amount of cash it generates from its operations and its operating costs, working capital needs and other like factors, all of which are affected by market movements and factors affecting its business lines. The benefit of investing in MLPs depends largely on the MLP being treated as a partnership for federal income tax purposes, which are not subject to income tax at the entity level. To qualify as a partnership for federal income tax purposes, a MLP must receive at least 90% of its income from qualifying sources as set forth in the Code, which include, among others, interest, dividends, real property rents, certain capital gains, and the exploration, development, mining, production, processing, refining, transportation, and marketing of oil, gas, minerals and other natural resources. If, as a result of a change in current law or change in an MLP’s business, an MLP were treated as a corporation for federal income tax purposes, the MLP would be

Northwestern Mutual Series Fund, Inc. Prospectus 134

obligated to pay federal income tax on its income at the corporate tax rate. In such cases, the amount of cash available for distribution would be reduced and the distributions received by the Portfolio might be taxed entirely as dividend income.

Temporary Defensive Investments and Cash Reserves. A certain portion of a Portfolio’s assets may be held in cash or money market reserves. Short-term, high quality U.S. and foreign dollar denominated money market securities, including repurchase agreements, may be held by any Portfolio. In times of unstable or adverse market or economic conditions, up to 100% of a Portfolio’s assets may be invested in temporary defensive instruments in an effort to enhance liquidity or preserve capital. Temporary defensive investments may be inconsistent with a Portfolio’s principal investment strategies and generally include cash, cash equivalents such as commercial paper, money market instruments, short-term debt securities, U.S. government securities or repurchase agreements. A Portfolio could also hold these types of securities pending the investment of proceeds from the sale of Portfolio shares or Portfolio securities, to meet anticipated redemptions of Portfolio shares or in support of a Portfolio’s position in certain derivative instruments. A Portfolio may invest in temporary defensive investments for undetermined periods of time, depending on market or economic conditions. To the extent a Portfolio holds cash reserves or invests defensively in these securities, it might not achieve its investment objective.

Other Investments and Techniques. The Portfolios may invest in other types of securities and use a variety of investment techniques and strategies which are not described in this Prospectus. These securities and techniques may subject the Portfolios to additional risks. Please see the Statement of Additional Information for additional information about the securities and investment techniques described in this Prospectus and about additional securities and techniques that may be used by the Portfolios.

Other Risks

Cyber Security. The Fund and its service providers have administrative and technical safeguards in place with respect to information security. Nevertheless, the Fund and its service

providers are potentially susceptible to operational and information security risks resulting from a cyber-attack as the Fund is highly dependent upon the effective operation of its computer systems and those of its business partners. These risks include, among other things, the theft, misuse, corruption and destruction of data maintained online or digitally, denial of service on websites and other operational disruption and unauthorized release of confidential customer information. Cyber-attacks affecting Northwestern Mutual, the Fund, the Adviser, Sub-Advisers, custodians, intermediaries and other affiliated or third-party service providers may adversely affect the Fund and contract owners. For instance, cyber-attacks may interfere with the processing of Fund transactions, including the processing of orders, impact the Fund’s ability to calculate net asset values, cause the release and possible destruction of confidential customer or business information, impede trading, subject the Fund and/or its service providers and intermediaries to regulatory fines and financial losses and/or cause reputational damage. Cyber security risks may also impact the issuers of securities in which the Fund invests, which may cause the Fund’s investments to lose value. The Fund may also incur additional costs for cyber security risk management in the future. There can be no assurance that the Fund or its service providers will avoid losses affecting the Fund due to cyber-attacks or information security breaches in the future.

Operational Risk. The Fund is exposed to operational risk arising from a number of factors, including but not limited to, human error, processing and communication errors, errors of the Fund’s service providers, counterparties or other third parties, failed or inadequate processes and technology or system failures. Additionally, the success of a Portfolio will depend in part upon the skill and expertise of certain personnel of the Portfolio’s Sub-Adviser, and there can be no assurance that any such personnel will continue to be associated with a Portfolio.

Regulation Risk. Laws and regulations affecting the Fund, the Adviser and the Sub-Advisers change from time to time. The Fund cannot predict the effects, if any, of future legal and regulatory changes on the Fund.

THE INVESTMENT ADVISER AND SUB-ADVISERS

The Investment Adviser

The investment adviser for each Portfolio is Mason Street Advisors, LLC, a wholly owned subsidiary of Northwestern Mutual. Mason Street Advisors’ address is 720 East Wisconsin Avenue, Milwaukee, Wisconsin 53202. Mason Street Advisors provides advisory and related services to Northwestern Mutual Series Fund, Inc. (the “Fund”). As of December 31, 2024, Mason Street Advisors had approximately $35.0 billion in assets under management.

As investment adviser, Mason Street Advisors manages the operations of the Fund and provides investment advice and recommendations regarding the purchase and sale of securities for those Portfolios that do not employ a sub-adviser. For those Portfolios that employ a sub-adviser, Mason Street Advisors oversees and evaluates the activities of the sub-advisers, including investment performance, investment operations and processes. See also “Manager of Managers Structure”, below. Pursuant to its advisory agreement with the Fund, Mason Street

135 Northwestern Mutual Series Fund, Inc. Prospectus

Advisors also provides or procures the management of the Fund’s administrative affairs, including mutual fund accounting services, legal services, investment operations services and corporate and regulatory reporting, oversees the Fund’s service providers and provides overall risk management for the Fund, including investment, operational and financial risk.

The Sub-Advisers

Each of the following sub-advisers has been retained by Mason Street Advisors and the Fund pursuant to an investment sub-advisory agreement to provide investment advice and, in general, to conduct the management investment program of one or more Portfolios, subject to the general control of the Board of Directors of the Fund and Mason Street Advisors:

abrdn Investments Limited (formerly known as Aberdeen Asset Managers Limited) (“abrdn”), a Scottish company, with its registered offices at 10 Queen’s Terrace, Aberdeen, Scotland AB10 1XL, has served as sub-adviser to the Emerging Markets Equity Portfolio since March 2017. abrdm is an indirect wholly-owned subsidiary of aberdeen group plc which has registered offices at 1 George Street, Edinburgh, Scotland EH2 2LL. aberdeen group plc provides asset management and investment solutions for clients and customers worldwide and also has a strong position in the pensions and savings market. The asset management business of aberdeen group plc operates under the name and is herein referred to collectively as “abrdn”.

Allspring Global Investments, LLC (“Allspring”), 1415 Vantage Park Drive, Charlotte, North Carolina, 28203, has served as sub-adviser to the Select Bond Portfolio since 2021 (with the Allspring portfolio management team providing management services to the Portfolio on behalf of the previous sub-adviser since 2014). Allspring is a wholly- owned subsidiary of Allspring Global Investment Holdings, LLC, a holding company indirectly owned by certain private funds of GTCR LLC and Reverence Capital Partners, L.P. Allspring is a leading independent asset management firm that offers a broad range of investment products and solutions through thoughtful investing, purposeful planning, and the desire to deliver outcomes that expand above and beyond financial gains.

American Century Investment Management, Inc. (“American Century Investments”), 4500 Main Street, Kansas City, Missouri 64111, has been managing mutual funds since 1958. American Century Investments has served as sub-adviser to the Large Company Value and Inflation Protection Portfolios since May 2007 and to the Mid Cap Value Portfolio since February 2009. American Century Investments is a direct, wholly owned subsidiary of American Century Companies, Inc. (“ACC”). The Stowers Institute for Medical Research (“SIMR”) controls ACC by virtue of its beneficial ownership of more than 25% of the voting securities of ACC. SIMR is part of a non-for-profit biomedical research organization dedicated to finding the keys to the causes, treatments and prevention of disease.

BlackRock Advisors, LLC (“BlackRock”), 100 Bellevue Parkway, Wilmington, Delaware 19809, an indirect, wholly owned subsidiary of BlackRock, Inc., has served as sub-adviser

to the Government Money Market Portfolio since November 2014 and the Index 500 Stock Portfolio since February 2021. BlackRock was organized in 1994 to perform advisory services for investment companies.

Delaware Investments Fund Advisers (“DIFA”), Delaware Investments Fund Advisers ("DIFA"), 610 Market Street, Philadelphia, Pennsylvania, 19106, has served as sub- adviser for the Domestic Equity Portfolio since October 2012. DIFA is a series of Macquarie Investment Management Business Trust ("MIMBT"), which is a Delaware statutory trust. MIMBT is subsidiary of Macquarie Group Limited and a part of Macquarie Asset Management ("MAM"). MAM is the marketing name for certain companies comprising the asset management division of Macquarie Group Limited.

Dodge & Cox, 555 California Street, 40th Floor, San Francisco, California 94104, has served as sub-advisor for the International Equity Portfolio since November 2021. Dodge & Cox, a California corporation, is one of the oldest professional investment management firms in the United States, having acted continuously as investment managers since 1930. Dodge & Cox’s activities are devoted to investment research and the supervision of investment accounts for individuals and institutions.

Federated Investment Management Company (“Federated”), 1001 Liberty Avenue, Pittsburgh, Pennsylvania 15222-3779, has served as sub-adviser to the High Yield Bond Portfolio since November 2014. Federated is an indirect, wholly owned subsidiary of Federated Hermes, Inc. (“FHI”). FHI is a client-driven, multi-product, and multi-strategy investment manager. FHI provides world-class active investment management and engagement services to more than 10,000 institutions and intermediaries including corporations, government entities, insurance companies, foundations and endowments, banks and broker/dealers.

FIAM LLC (“FIAM”), 900 Salem Street, Smithfield, Rhode Island, 02917, has served as sub-adviser to the International Growth Portfolio since August 2015. FIAM provides investment management services to institutional investors worldwide. FIAM is an indirectly held, wholly owned subsidiary of FMR LLC.

J.P. Morgan Investment Management Inc. (“JPMIM”), 383 Madison Avenue, New York, NY 10179, serves as sub-adviser to the Large Cap Blend Portfolio since July 2023 and the Mid Cap Growth Stock Portfolio effective from and after October 28, 2024. JPMIM is a wholly-owned subsidiary of JPMorgan Asset Management Holdings Inc., which is a wholly-owned subsidiary of JPMorgan Chase & Co., a bank holding company.

Loomis, Sayles & Company, L.P. (“Loomis Sayles”), One Financial Center, Boston, Massachusetts 02111, has served as sub-adviser to the Focused Appreciation Portfolio since August 2015. Loomis Sayles is a Delaware limited partnership. Loomis Sayles’ sole general partner, Loomis, Sayles & Company, Inc. is directly owned by Natixis Investment Managers, LLC (“Natixis

Northwestern Mutual Series Fund, Inc. Prospectus 136

LLC”). Natixis LLC is an indirect subsidiary of Natixis Investment Managers, an international asset management group based in Paris, France, that is in turn owned by Natixis, a French investment banking and financial services firm. Natixis is wholly owned by BPCE, France’s second largest banking group. BPCE is owned by banks comprising two autonomous and complementary retail banking networks consisting of the Caisse d’Epargne regional savings banks and the Banque Populaire regional cooperative banks. The registered address of Natixis is 30, avenue Pierre Mendès France, 75013 Paris, France. The registered address of BPCE is 50, avenue Pierre Mendès France, 75013 Paris, France.

Massachusetts Financial Services Company (MFS®(1)), 111 Huntington Avenue, Boston, Massachusetts 02199, has served as sub-adviser for the Research International Core Portfolio since May 2007. MFS® is America’s oldest mutual fund organization. MFS® and its predecessor organizations have a history of money management dating from 1924 and the founding of the first mutual fund, Massachusetts Investors Trust. MFS is a subsidiary of Sun Life of Canada (U.S.) Financial Services Holdings, Inc., which in turn is an indirect, majority-owned subsidiary of Sun Life Financial Inc., a diversified financial services company.

Northern Trust Investments, Inc. (“Northern Trust”), 50 South LaSalle Street, Chicago, Illinois 60603, an indirect subsidiary of Northern Trust Corporation, has served as sub-adviser to the Index 400 Stock and Index 600 Stock Portfolios since February 2021. Northern Trust is an Illinois State Banking Corporation and an investment adviser registered under the Investment Advisers Act of 1940, as amended. It primarily manages assets for institutional and individual separately managed accounts, investment companies and bank common and collective funds.

Pacific Investment Management Company LLC (“PIMCO”), 650 Newport Center Drive, Newport Beach, California 92660, has served as sub-adviser for the Multi-Sector Bond Portfolio and the Long-Term U.S. Government Bond Portfolio since May 2007. PIMCO was organized in 1971 and provides investment management and advisory services to private accounts of institutional and individual clients and to mutual funds. PIMCO is a majority-owned subsidiary of Allianz Asset Management of America LLC (“AAM”), which is a subsidiary of Allianz SE (“Allianz”). Allianz is a European-based, multinational insurance and financial services holding company.

T. Rowe Price Associates, Inc. (“TRPA”), 100 East Pratt Street, Baltimore, Maryland 21202, is a wholly owned subsidiary of T. Rowe Price Group, Inc., a publicly traded financial services holding company. TRPA has served as the sub-adviser for the Equity Income Portfolio since May 2003, the Short-Term Bond Portfolio since November 2014 and the Growth Stock Portfolio since November 2019 and the Small Cap Value Portfolio from August 2001 – March 7, 2022.

T. Rowe Price Investment Management, Inc. (“TRPIM”), 100 East Pratt Street, Baltimore, Maryland 21202, is a wholly owned subsidiary of T. Rowe Price Associates, Inc., an investment management firm and wholly owned subsidiary of T. Rowe Price Group, Inc., a publicly traded financial services holding company (collectively, “T. Rowe Price”). TRPIM has served as the sub- adviser for the Small Cap Value Portfolio since March 7, 2022.

Wellington Management Company LLP (“Wellington Management”), 280 Congress Street, Boston, Massachusetts 02210, has served as sub-adviser to the Small Cap Growth Stock Portfolio since July 2013 and the Large Cap Core Stock Portfolios since October 2017. Wellington Management is a professional investment counseling firm that provides investment services to investment companies, employee benefit plans, endowments, foundations, and other institutions. Wellington Management and its predecessor organizations have provided investment advisory services for over 90 years. Wellington Management is owned by the partners of Wellington Management Group LLP.

Portfolio Managers

A brief biography of each portfolio manager who has responsibility for the day-to-day management of one or more Portfolios is set forth below. Please see the Statement of Additional Information for additional information about the portfolio managers’ investments in the Portfolio(s) that they manage, a description of portfolio manager compensation and information regarding other accounts that the portfolio managers manage.

Growth Stock Portfolio

Paul D. Greene II, CFA, Vice President of TRPA and an Associate Portfolio Manager of TRPA’s US Large-Cap Core Growth Equity Strategy in the U.S. Equity Division, has been managing the Portfolio since January 2020. Mr. Greene has served as portfolio manager for several T. Rowe Price funds. He joined TRPA in 2006, beginning as a member of the firm’s U.S. Equity Division.

Focused Appreciation Portfolio

Aziz V. Hamzaogullari, is the founder of the Growth Equity Strategies Team and Chief Investment Officer at Loomis Sayles. He is the Portfolio Manager of the Loomis Sayles Large Cap Growth, All Cap Growth, Global Growth and International Growth long-only strategies as well as the Long/Short Growth Equity strategy. Offerings include the Loomis Sayles US Growth Equity, US Equity Leaders and Global Growth Equity funds, along with US products. Mr.Hamzaogullari is also a member of the Firm’s Board of Directors. He joined Loomis Sayles in 2010 from Evergreen Investments where he was a senior portfolio manager. He joined Evergreen in 2001, was

(1)

MFS® is a registered trademark of Massachusetts Financial Services Company.

137 Northwestern Mutual Series Fund, Inc. Prospectus

promoted to director of research in 2003 and portfolio manager in 2006. Mr.Hamzaogullari was head of Evergreen’s Berkeley Street Growth Equity team and was the founder of the research and investment process. Prior to Evergreen, he was a senior equity analyst and portfolio manager at Manning & Napier Advisors. He has 31 years of investment industry experience. Mr.Hamzaogullari is a member of the Board of Trustees at Dana Hall School in Wellesley, Massachusetts. He earned a BS from Bilkent University, Türkiye, and an MBA from George Washington University. Mr.Hamzaogullari is also a CFA® charterholder and a member of the CFA Society of Boston.

Large Cap Core Stock Portfolio

Jonathan G. White, CFA and Head of Research Portfolios of Wellington Management, has co-managed the Portfolio since October 2017. He joined Wellington Management in 1999 and has been in his current role since 2013. Prior to his current position, he was manager of equity portfolio coordination for the firm.

Mary L. Pryshlak, CFA, Head of Investment Research of Wellington Management, has co-managed the Portfolio since May 2018. She joined Wellington Management in 2004 and has been in her current role since 2018. Prior to her current position, she was a Global Industry Analyst covering property and casualty insurance stocks.

Large Cap Blend Portfolio

Scott B. Davis, Managing Director, joined J.P. Morgan Investment Management Inc. in 2006, previously worked as an analyst in the U.S. Equity Research Group, became a portfolio manager in 2013 and has managed the Portfolio since July 2023.

Shilpee Raina, Executive Director, CFA charterholder, joined J.P. Morgan Investment Management Inc. in 2005, previously worked as a research analyst on the JPMorgan Equity Income and U.S. Value Funds, and has managed the Portfolio since July 2023.

Index 500 Stock Portfolio

Peter Sietsema, Director of BlackRock, Inc. since 2007, member of Black Rock’s Index Equity Portfolio Management Group, has co-managed the Portfolio since May 2022.

Jennifer Hsui, CFA, Managing Director of BlackRock, Inc. since 2011, Director of BlackRock, Inc. from 2009 to 2011, Principal of BGI from 2006 to 2009, has co-managed the Portfolio since February 2021.

Paul Whitehead, Managing Director of BlackRock, Inc. since 2010, Director of BlackRock, Inc. from 2009 to 2010; Principal of Barclays Global Investors (“BGI”) from 2002 to 2009 and has co-managed the Portfolio since May 2022.

Large Company Value Portfolio

American Century Investments uses teams of portfolio managers and analysts, organized by broad investment categories, to manage funds. The listed portfolio managers are members of the team that manages the Large Company Value Portfolio and are ultimately responsible for the day-to-day management of the Portfolio, which includes security selection and portfolio construction, as well as compliance with stated investment objectives.

Brian Woglom, CFA, Vice President and Senior Portfolio Manager, joined American Century Investments in 2005 and became a portfolio manager in 2012.

Philip Sundell, CFA, Vice President and Portfolio Manager, joined American Century Investments in 1997 and became a portfolio manager in 2017.

Adam Krenn, CFA, Portfolio Manager and Senior Investment Analyst, joined American Century Investments in 2011 and became a portfolio manager in 2020.

Domestic Equity Portfolio

Nikhil G. Lalvani, CFA, Managing Director, Senior Portfolio Manager and Team Leader for Delaware Investments Fund Advisers (“DIFA”), has been with Macquarie Asset Management since 1997, and has co-managed the portfolio since 2012.

Erin Ksenak, Senior Vice President and Portfolio Manager for DIFA, has been with Macquarie Asset Management since 2017, and has co-managed the portfolio since December 2020.

Equity Income Portfolio

The Equity Income Portfolio is managed by an investment advisory committee whose chairman is John D. Linehan, a Vice President of TRPA. As investment advisory committee chairman, he has day-to-day responsibility for managing the Portfolio and works with the committee in developing and executing its investment program. Mr. Linehan has been chairman of the Portfolio’s committee since 2015 and joined TRPA in 1998. Since 2015, he has served as portfolio manager and the Head of U.S. Equity for TRPA.

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Mid Cap Growth Stock Portfolio

Felise L. Agranoff, Managing Director, joined J.P. Morgan Investment Management, Inc. in 2004,previously worked as an analyst in the U.S. Equity Group, became a portfolio manager in 2015 andhas managed the Portfolio since October 2024.

Daniel Bloomgarden, Managing Director, joined J.P. Morgan Investment Management, Inc. in2015, is a portfolio manager and research analyst within the U.S. Equity Group, and has managedthe Portfolio since October 2024.

Index 400 Stock Portfolio

Lucy Johnston, Vice President of Northern Trust Investments, Inc., has co-managed the Portfolio since February 2021. Ms. Johnston joined Northern Trust Investments, Inc. in 1997 and has managed passive and index products for large, medium and small capitalization markets.

Keith Carroll, Portfolio Manager at Northern Trust Investments, Inc., has co-managed the Portfolio since September 2024. Mr. Carroll joined Northern Trust Investments, Inc. in 2007.

Mid Cap Value Portfolio

American Century Investments uses teams of portfolio managers and analysts, organized by broad investment categories, to manage funds. The listed portfolio managers are members of the team that manages the Mid Cap Value Portfolio and are ultimately responsible for the day-to-day management of the Portfolio, which includes security selection and portfolio construction, as well as compliance with stated investment objectives.

Michael Liss, CFA, CPA, Vice President and Senior Portfolio Manager, joined American Century Investments in 1998 and became a portfolio manager in 2004.

Kevin Toney, CFA, Chief Investment Officer — Global Value Equity, Senior Vice President and Senior Portfolio Manager, joined American Century Investments in 1999 and became a portfolio manager in 2006.

Brian Woglom, CFA, Vice President and Senior Portfolio Manager, joined American Century Investments in 2005 and became a portfolio manager in 2012.

Nathan Rawlins, CFA, Portfolio Manager and Senior Investment Analyst, joined American Century in 2015 as an investment analyst, became a senior investment analyst in 2020 and a portfolio manager in 2022.

Small Cap Growth Stock Portfolio

David Siegle, CFA, Managing Director and Equity Portfolio Manager of Wellington Management, has been co-managing the Portfolio since 2023. He joined Wellington Management in 2001 and has been an investment professional since 2001.

Index 600 Stock Portfolio

Keith Carroll, Portfolio Manager at Northern Trust Investments, Inc., has co-managed the Portfolio since February 2021. Mr. Carroll joined Northern Trust Investments, Inc. in 2007.

Lucy Johnston, Vice President of Northern Trust Investments, Inc., has co-managed the Portfolio since September 2024. Ms. Johnston joined Northern Trust Investments, Inc. in 1997 and has managed passive and index products for large, medium and small capitalization markets.

Small Cap Value Portfolio

J. David Wagner, CFA, a Vice President of T. Rowe Price Investment Management, Inc. (“TRPIM”) has managed the Portfolio in his capacity with TRPIM since March 2022 and had served as portfolio manager to the Portfolio in his capacity with T. Rowe Price Associates, Inc. since 2014. He has day-to-day responsibility for managing the Portfolio. Mr. Wagner joined T. Rowe Price in 2000.

International Growth Portfolio

Jed Weiss, Portfolio Manager, began managing the International Growth Portfolio in 2015. Mr. Weiss has worked as a research analyst and portfolio manager (other than for a 6-month leave of absence in 2017) at Fidelity Management & Research Company, LLC. (an affiliate of FIAM LLC) since 1997.

Research International Core Portfolio

John Mahoney, CFA, Investment Officer of MFS, has been employed in the investment area of MFS since January 2024, and had previously served as a Senior Strategist - Investment Product Specialist at MFS until January 20244. Mr. Mahoney has managed the Portfolio since January 2024.

Nicholas Paul, CFA, Investment Officer of MFS, has been employed in the investment area of MFS since 2018, and had previously served as an investment product specialist at MFS since 2010. Mr. Paul has managed the Portfolio since December 2022.

139 Northwestern Mutual Series Fund, Inc. Prospectus

Mr. Paul and Mr. Mahoney co-manage the Portfolio, each providing general oversight of a team of investment professionals.

International Equity Portfolio

The Portfolio is managed by Dodge & Cox’s International Equity Investment Committee (“IEIC”), whose members are jointly and primarily responsible for the management of the Portfolio. The IEIC consists of the following members:

Roger G. Kuo, CFA, President since 2022, Director since 2016, Research Analyst since 1998 and member of IEIC since 2006, joined Dodge & Cox in 1998 and has managed the Portfolio since November 2021.

Sophie Chen, CFA, Vice President since 2016, Research Analyst since 2012 and member of IEIC since 2024, joined Dodge & Cox in 2012 and has managed the Portfolio since January 2024.

Englebert T. Bangayan, CFA. Vice President since 2011, Research Analyst since 2002, and member of IEIC since 2015, joined Dodge & Cox in 2002 and has managed the Portfolio since November 2021.

Raymond J. Mertens, CFA, Senior Vice President and Director since 2022, Vice President since 2008, Research Analyst since 2003, and member of IEIC since 2018, joined Dodge & Cox in 2003 and has managed the Portfolio since November 2021.

Paritosh Somani, CFA, Vice President since 2012, Research Analyst since 2007, and member of IEIC since 2021, joined Dodge & Cox in 2007 and has managed the Portfolio since November 2021.

Emerging Markets Equity Portfolio

The Portfolio is managed by abrdn’s Global Emerging Markets Equity Team. The team members are jointly and primarily responsible for the day-to-day management of the Portfolio, with the following members having the most significant responsibility for the day-to-day management of the Portfolio:

Devan Kaloo, is Global Head of Equities and Head of Global Emerging Markets Equities for abrdn. Mr. Kaloo joined abrdn in 2000 as part of the Asian Equities Team in Singapore, before later transferring to London where he took up the position of Head of Global Emerging Markets Equities in 2005. In 2015, he was promoted to Global Head of Equities and joined abrdn’s group management board. Mr. Kaloo started in fund management with Martin Currie in 1994 covering Latin America, before subsequently working with the North American equities, global asset allocation and eventually the Asian equities teams.

Nick Robinson, CFA, is a Senior Investment Director on the Global Emerging Markets Equity Team at abrdn. Mr. Robinson joined the company in 2000 and spent eight years on the North American Equities team, including three years based in the

company‘s US offices. In 2008 he joined the Global Emerging Markets Equity team. Mr. Robinson relocated to São Paulo in 2009 to start abrdn’s operations in Brazil. In 2016 he returned to London.

Short-Term Bond Portfolio

Michael F. Reinartz, CFA, a Vice President of TRPA and Chairman of TRPA’s Short-Term Bond Investment Advisory Committee has managed the Portfolio since 2015. Mr. Reinartz joined TRPA in 1996, and his investment experience dates back to 2000. During the past five years, he has served as a portfolio manager and prior to that worked closely with TRPA’s portfolio managers in managing the short-term bond strategies, and as an investment analyst for short-term bond and multi-sector bond strategies.

Steve Kohlenstein, CFA, a Vice President of TRPA and Co-Chairman of TRPA’s Short-Term Bond Investment Advisory committee has co-managed the Portfolio since October 2023. Mr. Kohlenstein joined TRPA in 2010, and his investment experience dates back to 2011. During the past five years, he has served as a co-portfolio manager of the US Short Duration Income Strategy and worked closely with the Low Duration and Investment Grade teams, partnered in the portfolio management of securitized credit assets, and worked with the Fixed Income Quantitative team in providing support for the investment strategies.

Select Bond Portfolio

Maulik Bhansali, CFA, is a Senior Portfolio Manager and Co-Head of the Core Fixed Income Team at Allspring. He has co-managed the Portfolio in his capacity with Allspring since November 2021 and had served as co-manager to the Portfolio in his capacity with the previous sub-adviser, Wells Fargo Asset Management (WFAM), since October 2017. Prior to his current role, Mr. Bhansali served as an equity research analyst responsible for quantitative modeling and portfolio construction in addition to fundamental analysis for various equity teams. Before joining WFAM, he served as a retirement actuary at Watson Wyatt Worldwide.

Jarad Vasquez, is a Senior Portfolio Manager and Co-Head of the Core Fixed Income team at Allspring. He has co-managed the Portfolio in his capacity with Allspring since November 2021 and had served as co-manager to the Portfolio in his capacity with the previous sub-adviser, Wells Fargo Asset Management (WFAM), since October 2017. Prior to joining WFAM, Mr. Vasquez was a trader at Susquehanna International Group, where he traded mortgage- backed securities in a proprietary relative-value strategy and was an equity options specialist on the Philadelphia Stock Exchange.

Long-Term U.S. Government Bond Portfolio

Stephen Rodosky, is a Managing Director in PIMCO’s Newport Beach office and a portfolio manager for real return and U.S. long duration strategies. He serves as head of talent

Northwestern Mutual Series Fund, Inc. Prospectus 140

management for portfolio management in the U.S. and previously led the firm’s U.S. rates team. Prior to joining PIMCO in 2001, Mr. Rodosky was vice president of institutional sales with Merrill Lynch.

Michael Cudzil, is a Managing Director in the Newport Beach office and a senior member of the liability driven investment portfolio management team and a generalist portfolio manager. He has served as chair of the Americas Portfolio Committee, as a rotating member on the PIMCO Investment Committee and as co-head of the agency MBS portfolio management team. Mr. Cudzil joined PIMCO in 2012. Prior to joining PIMCO, he worked as a Managing Director and head of pass-through trading at Nomura.

Inflation Managed Portfolio

American Century Investments uses teams of portfolio managers and analysts, organized by broad investment categories such as money markets, corporate bonds, government bonds and municipal bonds, to manage fixed-income funds (such as the Portfolio). The listed portfolio managers are members of the team that manages the Inflation Managed Portfolio and are ultimately responsible for the day-to-day management of the Portfolio within its strategic investment parameters, which includes security selection and portfolio construction, as well as compliance with stated investment objectives.

James E. Platz, CFA, Vice President and Portfolio Manager, joined American Century Investments in October 2003 as a portfolio manager.

Robert V. Gahagan, Senior Vice President and Senior Portfolio Manager, joined American Century Investments in 1983 and became a portfolio manager in January 1991. Mr. Gahagan serves on the American Century Investments’ Global Macro Strategy Team, which is responsible for periodically adjusting the Portfolio’s strategic investment parameters based on economic and market conditions.

Miguel Castillo, Vice President and Portfolio Manager, joined American Century Investments in February 2008 as a portfolio research analyst, served as a fixed income trader from 2008 to 2014, and has served as a Portfolio Manager on American Century Investment’s portfolio management team since 2014. He has served as a portfolio manager of the Portfolio since 2015.

Stephen Bartolini, CFA, Vice President, Senior Portfolio Manager, has served American Century as a portfolio manager since 2024. Prior to joining American Century, Mr. Bartolini was a portfolio manager at T. Rowe Price and the co-head of the Global Interest Rate and Currency strategy team from 2010 to 2024. He has managed the Portfolio since September 2024.

High Yield Bond Portfolio

Mark E. Durbiano, CFA, Senior Portfolio Manager and Senior Vice President of Federated, has managed the Portfolio since 2014. Mr. Durbiano joined Federated in 1982 and has been Senior Portfolio Manager and Senior Vice President since 1996. From 1988 to 1995, Mr. Durbiano was a Portfolio Manager and Vice President of Federated.

Kathryn Glass, CFA, Portfolio Manager and Vice President of Federated, has managed the Portfolio since May 2024. Ms. Glass joined Federated in 1999 and has been Portfolio Manager since 2016 and Vice President since 2014.

Thomas Scherr, CFA, Portfolio Manager and Vice President of Federated, has managed the Portfolio since May 2024. Mr. Scherr joined Federated in 2006 and has been Portfolio Manager since 2015 and Vice President since 2016.

Randal Stuckwish, CFA, Portfolio Manager and Vice President of Federated, has managed the Portfolio since May 2024. Mr. Stuckwish joined Federated in 2013 and has been Portfolio Manager and Vice President since 2022.

Multi-Sector Bond Portfolio

Sonali Pier, a Managing Director and portfolio manager in PIMCO’s Newport Beach Office, co-manages the Portfolio. She focuses on high yield and multi-sector credit opportunities. She contributes to PIMCO’s Diversified Income, Crossover and Global Credit Opportunities and High Yield Funds, and she has served as a rotating member on PIMCO’s Investment Committee and Americas Portfolio Committee. Prior to joining PIMCO in 2013, she was a senior credit trader at J.P. Morgan, trading cash, recovery and credit default swaps across various sectors.

Daniel J. Ivascyn, Group Chief Investment Officer and a Managing Director in PIMCO’s Newport Beach office, co-manages the Portfolio. He is lead portfolio manager for the PIMCO’s income strategies and credit hedge fund and mortgage opportunistic strategies. He is a member of PIMCO’s Executive Committee and a member of the Investment Committee. Prior to joining PIMCO in 1998, he worked at Bear Stearns in the asset-backed securities group, as well as T. Rowe Price and Fidelity Investments.

Alfred T. Murata, a Managing Director and portfolio manager in PIMCO’s Newport Beach office, co-manages the Portfolio. He focuses on income-oriented, multi-sector credit, opportunistic and securitized strategies. Prior to joining PIMCO in 2001, he researched and implemented exotic equity and interest rate derivatives at Nikko Financial Technologies.

141 Northwestern Mutual Series Fund, Inc. Prospectus

Charles Watford, an Executive Vice President and portfolio manager in the London office, co-manages the Portfolio. He focuses on high yield and is also a research analyst focused on the European automotive and real estate sectors. Prior to joining PIMCO in 2007, Mr. Watford was a management consultant at McKinsey & Company and an investment banking analyst at Morgan Stanley. He has 20 years of investment experience and holds an MBA from the Wharton School of the University of Pennsylvania. He also holds a master's degree in chemistry from the University of Oxford.

Regina Borromeo, Executive Vice President, portfolio manager, and a senior member of PIMCO’s global credit team, co-manages the Portfolio. She focuses on multi-sector credit as well as ESG-oriented credit and income strategies. She is a member of PIMCO’s ESG portfolio management team and PIMCO PRIDE EMEA ERG Committee. Prior to joining PIMCO in 2022, Ms. Borromeo was a senior portfolio manager and director of global fixed income at Robeco UK Limited, overseeing investments across a variety of credit and ESG-oriented strategies. Prior to that, Ms. Borromeo was a portfolio manager and head of international high yield at Brandywine Global Investment Management (Europe). She also held roles at Morgan Stanley Investment Management as vice president, senior research analyst and portfolio manager, global fixed income, and at Goldman Sachs. She has investment experience since 2001 and holds a bachelor of arts from the University of Pennsylvania.

Active/Passive Balanced Portfolio / Active/Passive Moderate Portfolio

The Active/Passive Balanced Portfolio and Active/Passive Moderate Portfolio are each managed by the following co-managers, who are responsible for making the allocation decisions across asset categories and among the Underlying Portfolios:

James Fleming, CFA, a Vice President of Mason Street Advisors, co-manages the Portfolios. Mr. Fleming joined Mason Street Advisors in 2008. He also oversees Mason Street Advisors’ derivatives risk management and credit analysis activities. Prior to joining Mason Street Advisors, he was a Vice President and Director of Research for Cleary Gull, a Milwaukee-based Investment Consultant.

Rodney Schmucker, CFA, a Vice President of Mason Street Advisors, co-manages the Portfolios. He joined Mason Street Advisors in 2008. He is also the lead trader for the Portfolios and assists in the oversight of Mason Street Advisors' derivatives risk management and commercial paper credit analysis activities. Prior to joining Mason Street Advisors, he was a Business Development Manager for Thomson Transaction Services, a subsidiary of Thomson Reuters based in Brookfield, WI.

Brent G. Schutte, CFA, Chief Investment Officer of Mason Street Advisors, co-manages the Portfolios. Mr. Schutte joined Mason Street Advisors in December 2021. Mr. Schutte is also

Chief Investment Officer of Northwestern Mutual Wealth Management Company (“NMWMC”), an affiliate of Mason Street Advisors, joining NMWMC in 2015.

Garrett D. Aird, CFA, a Vice President of Mason Street Advisors, co-manages the Portfolios. Mr. Aird joined Mason Street Advisors in December 2021. Mr. Aird is also Vice President – Investment Management & Research of NMWMC. Mr. Aird joined NMWMC in 2007 and serves as Chair of the NMWMC Investment Committee.

Advisory Fees

Each Portfolio pays a monthly fee for investment advisory services at an annual rate based on a percentage of the aggregate average daily net asset values of the Portfolios, as set forth below. Mason Street Advisors pays each sub-adviser out of its investment advisory fee. In addition to approving all advisory and sub-advisory agreements, the Fund’s Board of Directors considers the renewal of each advisory and sub-advisory agreement, including fees, at least annually. A discussion regarding the basis for approval by the Fund’s Board of Directors of each advisory and sub-advisory agreement will appear in the Fund’s report on Form N-CSR for the period-ended June 30, 2025.

Advisory Fees:

The following table shows the advisory fees for each of the Portfolios for the fiscal year ended December 31, 2024 as a percentage of the average net assets of the Portfolios based on 2024 operations and reflecting contractual waivers, limitations and reimbursements:

Portfolio	Investment Advisory Fee
Growth Stock	0.41%
Focused Appreciation	0.60%
Large Cap Core Stock	0.41%
Large Cap Blend	0.66%
Index 500 Stock	0.19%
Large Company Value	0.65%
Domestic Equity	0.48%
Equity Income	0.55%
Mid Cap Growth Stock	0.52%
Index 400 Stock	0.22%
Mid Cap Value	0.68%
Small Cap Growth Stock	0.53%
Index 600 Stock	0.22%
Small Cap Value	0.84%
International Growth	0.58%
Research International Core	0.68%
International Equity	0.66%
Emerging Markets Equity	0.84%
Government Money Market	0.30%
Short-Term Bond	0.32%
Select Bond	0.29%
Long-Term U.S. Government Bond	0.50%

Northwestern Mutual Series Fund, Inc. Prospectus 142

Portfolio	Investment Advisory Fee
Inflation Managed	0.40%
High Yield Bond	0.42%
Multi-Sector Bond	0.67%
Active/Passive Balanced	0.08%
Active/Passive Moderate	0.08%

Expense Limitation and Advisory Fee Waiver Agreements:

Expense Limitation Agreements

Mason Street Advisors has contractually agreed to waive its investment advisory fee and/or reimburse certain expenses for the Portfolios referenced below to the extent necessary so that each Portfolio’s total operating expenses (excluding taxes, brokerage, other investment-related costs, interest and dividend expenses and charges, acquired fund fees and expenses, fees for class action, other passive securities litigation and anti-trust claim filing services and such non-recurring and extra ordinary expenses as they may arise) on an annualized basis do not exceed, after the waiver, the percentage of average net assets specified below (the “Expense Cap”):

Portfolio	Expense Cap	Expiration
Focused Appreciation	0.90%	April 30, 2026
Large Cap Blend	0.85%	April 30, 2026
Large Company Value	0.80%	April 30, 2026
Domestic Equity	0.75%	April 30, 2026
Equity Income	0.75%	April 30, 2026
Mid Cap Value	1.00%	April 30, 2026
Index 600 Stock	0.35%	April 30, 2026
Small Cap Value	1.00%	April 30, 2026
International Growth	1.10%	April 30, 2026
Research International Core	1.15%	April 30, 2026
Emerging Markets Equity	1.50%	April 30, 2026
Short-Term Bond	0.45%	April 30, 2026
Long-Term U.S. Government Bond	0.65%	April 30, 2026
Inflation Managed	0.65%	April 30, 2026
Multi-Sector Bond	0.90%	April 30, 2026
Active/Passive Moderate	0.75%	April 30, 2026

Advisory Fee Waiver Agreements

Growth Stock Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Growth Stock Portfolio on average net assets over 1 billion such that the fee is 0.60% on the Portfolio’s first $50 million of average net assets, 0.50% on the next $50 million, 0.40% on the next $900 million, and 0.38% on average net assets in excess of $1 billion. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Focused Appreciation Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Focused Appreciation Portfolio such that the management fee is

0.66% on the first $100 million of the Portfolio’s average net assets, 0.61% on the next $400 million, 0.60% on the next $500 million and 0.57% on average net assets in excess of $1 billion. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Large Cap Core Stock Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Large Cap Core Stock Portfolio on average net assets over $500 million such that the management fee is 0.60% on the Portfolio’s first $50 million of average net assets, 0.50% on the next $50 million, 0.40% on the next $400 million and 0.37% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Large Cap Blend Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Large Cap Blend Portfolio such that the management fee is 0.65% on the first $150 million of the Portfolio’s average net assets, 0.55% on the next $150 million, 0.55% on the next $200 million and 0.52% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Index 500 Stock Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Index 500 Stock Portfolio on average net assets over $2 billion such that the management fee is 0.20% on the Portfolio’s first $2 billion of average net assets and 0.18% on average net assets in excess of $2 billion. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Large Company Value Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Large Company Value Portfolio such that the management fee for the Portfolio will be 0.67% on the first $100 million of the Portfolio’s average net assets, 0.62% on the next $150 million, 0.59% on the next $250 million and 0.57% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Domestic Equity Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Domestic Equity Portfolio on average net assets over $500 million such that the management fee is 0.65% on the Portfolio’s first $100 million of average net assets, 0.55% of the next $150 million, 0.50% of the next $250 million, 0.43% of the next $500 million, and 0.41% on average net assets in excess of $1 billion. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

143 Northwestern Mutual Series Fund, Inc. Prospectus

the next $1 billion and 0.52% on average net assets in excess of $1.5 billion. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Mid Cap Growth Stock Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Mid Cap Growth Stock Portfolio on average net assets over $1 billion such that its management fee is 0.80% on the Portfolio’s first $50 million of average net assets, 0.65% on the next $50 million, 0.50% on the next $900 million, and 0.49% on average net assets in excess of $1 billion. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Index 400 Stock Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Index 400 Stock Portfolio on average net assets over $500 million such that the fee is 0.25% on the Portfolio’s first $500 million of average net assets and 0.20% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Mid Cap Value Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Mid Cap Value Portfolio such that the management fee for the Portfolio will be 0.78% on the first $150 million of the Portfolio’s average net assets, 0.66% on the next $350 million, and 0.63% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Small Cap Value Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Small Cap Value Portfolio on average net assets over $500 million such that the management fee is 0.85% on the first $500 million of average net assets and 0.80% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

International Growth Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the International Growth Portfolio on average net assets over $1 billion such that its management fee is 0.75% on the Portfolio’s first $100 million of average net assets, 0.65% of the next $150 million, 0.55% on the next $750 million, and 0.54% on average net assets in excess of $1 billion. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

of average net assets, 0.74% of the next $150 million, 0.67% on the next $200 million, and 0.60% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

International Equity Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the International Equity Portfolio on average net assets over $2 billion such that its management fee is 0.85% on the Portfolio’s first $50 million of average net assets, 0.65% on the next $1,950 million, and 0.63% on average net assets in excess of $2 billion. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Emerging Markets Equity Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Emerging Markets Equity Portfolio such that its management fee is 0.95% on the Portfolio’s first $250 million of average net assets, 0.87% on the next $250 million, 0.78% on the next $500 million, and 0.75% on average net assets in excess of $1 billion. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Government Money Market Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Government Money Market Portfolio on average net assets over $500 million such that its management fee is 0.30% on the Portfolio’s first $500 million of average net assets, 0.29% on the next $500 million, and 0.28% on average net assets in excess of $1 billion. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors. In addition, Mason Street Advisors has voluntarily agreed to waive its advisory fee and/or reimburse expenses in excess of the Government Money Market Portfolio’s daily yield so as to maintain a zero or positive yield for the Portfolio. This voluntary waiver is reviewed periodically by Mason Street Advisors in light of market and economic developments and may be revised or discontinued at any time without advance notice.

Short-Term Bond Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Short-Term Bond Portfolio on average net assets over $500 million such that the management fee is 0.35% on the Portfolio’s first $100 million of average net assets, 0.33% on the next $150 million, 0.30% on the next $250 million and 0.28% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Northwestern Mutual Series Fund, Inc. Prospectus 144

net assets and 0.28% on average net assets in excess of $2 billion. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Long-Term U.S. Government Bond Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Long-Term U.S. Government Bond Portfolio on average net assets over $500 million such that the management fee is 0.555% on the Portfolio’s first $100 million of average net assets, 0.515% on the next $150 million, 0.495% on the next $250 million and 0.445% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Inflation Managed Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Inflation Managed Portfolio such that the management fee is 0.42% on the Portfolio’s first $100 million of average net assets, 0.40% on the next $150 million, and 0.38% on average net assets in excess of $250 million. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

High Yield Bond Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the High Yield Bond Portfolio on average net assets over $1 billion such that the management fee is 0.60% on the Portfolio’s first $50 million of average net assets, 0.50% on the next $50 million, 0.40% on the next $900 million and 0.30% on average net assets in excess of $1 billion. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Multi-Sector Bond Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Multi-Sector Bond Portfolio such that the management fee is 0.73% on the Portfolio’s first $100 million of average net assets, 0.72% of the next $150 million, 0.69% on the next $250 million, and 0.64% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Active/Passive Balanced Portfolio. With respect to the Active/Passive Balanced Portfolio, Mason Street Advisors has agreed to waive a portion of its management fee such that its management fee is 0.10% of the Portfolio’s average net assets. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

Active/Passive Moderate Portfolio. With respect to the Active/Passive Moderate Portfolio, Mason Street Advisors has agreed to waive a portion of its management fee such that its management fee is 0.10% of the Portfolio’s average net assets. This fee waiver agreement may not be terminated prior to April 30, 2026 without action by the Board of Directors.

In periods of market volatility, a Portfolio’s average net assets may decline significantly, causing operating expenses to increase relative to a Portfolio’s average net assets. There are currently no arrangements in place pursuant to which the

Portfolios would be required to reimburse Mason Street Advisors for any fee amounts waived or expenses reimbursed to the Portfolios pursuant to the Expense Limitation and Advisory Fee Waiver Agreements described above.

Manager of Managers Structure

The Fund and Mason Street Advisors have received an exemptive order from the Securities and Exchange Commission that permits the Fund to employ a “manager of managers” structure. Under this structure, Mason Street Advisors, with the approval of the Board may hire, terminate or replace unaffiliated sub-advisers without shareholder approval, including, without limitation, the replacement or reinstatement of any unaffiliated sub-advisers with respect to which a sub-advisory agreement has automatically terminated as a result of an assignment. Under the manager of managers structure, Mason Street Advisors has the ultimate responsibility to oversee sub-advisers and recommend their hiring, termination and replacement to the Board.

Shareholders will be notified in the event the Fund hires or replaces an unaffiliated sub-adviser. The order also permits the Fund to disclose to shareholders the aggregate fees paid to the sub-adviser(s) by each Portfolio. The manager of managers’ structure does not alter the right of shareholders of a Portfolio to terminate a sub-advisory agreement with an unaffiliated sub-adviser at any time by a vote of the majority of the outstanding voting securities of such Portfolio, nor does it alter the right of shareholders of a Portfolio to approve any change in the management fee structure that increases the management fee paid by the Portfolio to Mason Street Advisors.

Legal Proceedings

There are currently no material pending legal proceedings, other than ordinary routine litigation incidental to the business, to which the Fund, the Fund’s Portfolios, or Mason Street Advisers is a party.

From time to time, each Sub-Adviser may be subject to certain routine legal and regulatory proceedings.

145 Northwestern Mutual Series Fund, Inc. Prospectus

ABOUT YOUR INVESTMENT

How Shares Are Priced

Shares of capital stock of each Portfolio of the Fund are offered and redeemed at their net asset value (“NAV”) as next determined following receipt of a purchase order or tender for redemption without the addition of any selling commission or “sales load” or any redemption charge. The redemption price may be more or less than the shareholder’s cost. A Portfolio’s NAV is determined as of the close of trading on the New York Stock Exchange (typically 4:00 p.m., Eastern time) on each day on which the Exchange is open for trading. To the extent a Portfolio holds securities that are primarily listed on foreign exchanges that trade on weekends or other days when the Portfolio does not price its shares, the value of these investments may change on days when shareholders will not be able to purchase or redeem the Portfolio’s shares.

For purposes of valuing securities held by a Portfolio, Section 2(a)(41) of the Investment Company Act of 1940, as amended, and Rule 2a-4 thereunder provide that securities for which market quotations are readily available are to be valued at market value and all other securities and assets are to be valued at fair value as determined in good faith by the Fund’s Board of Directors. Rule 2a-5 under the Investment Company Act of 1940, as amended, provides that a market quotation is readily available only when that quotation is a quoted price (unadjusted) in active markets for identical investments that a fund can access at the measurement date, provided that a quotation will not be readily available if it is not reliable. Securities and other Portfolio assets with readily available market quotations are priced at such market quotations, and all other securities and assets are fair valued in accordance with the requirements of Rule 2a-5.

Securities for which Market Quotations are Readily Available

Futures contracts are valued at the closing settlement price on the exchange. Options contracts are valued at the last quoted sales price or, if there is no such reported sale, long positions are valued at the most recent quoted bid price, and short positions at the most recent quoted ask price.

With respect to any portion of a Portfolio’s assets that are invested in one or more open-end management investment companies that are registered under the

Investment Company Act of 1940, as amended, (other than ETFs), the Portfolio’s NAV is calculated based on the NAVs of the registered open-end management companies in which the Portfolio invests. The prospectuses for these companies explain

the circumstances under which those companies will use fair value pricing and the effects of using fair value pricing. ETFs are valued at the last sale price as reported by a third-party pricing service on the primary exchange on which they are traded.

Fair Value Pricing

All Portfolio securities and other assets for which market quotations are not readily available, as defined by Rule 2a-5, are valued at their fair value as determined in good faith. The Board of Directors has designated the Adviser as the Board’s valuation designee under Rule 2a-5. As such, the Adviser will execute the fair valuation process on the Board’s behalf, subject to oversight by the Board.

Debt securities are generally valued using evaluated prices based on accepted industry conventions obtained from third-party pricing services. The pricing service may value a debt security by employing methods that utilize a market model that takes into consideration actual market transactions, broker-dealer supplied valuations, and/or other methodologies designed to identify the market value for such securities. Fair valuation procedures may be used under certain circumstances when pricing service valuations are not available or when the valuation designee determines the valuation does not reflect the debt security’s fair value. On any day a price is not available for a debt security with a remaining maturity of sixty days or less, such security may be fair valued by reference to the security’s amortized cost. All debt securities of the Government Money Market Portfolio are valued on an amortized cost basis or, if the current market value differs substantially from the amortized cost, by marking to market.

Swap contracts and other derivatives are valued at evaluated prices provided by the respective exchange, a pricing service or, if a pricing service is unable to supply a price for a particular swap, pursuant to fair value pricing procedures.

The possibility of fair value pricing means that changes in a Portfolio’s NAV may not always correspond to changes in quoted prices of a Portfolio’s investments. Fair value procedures may be widely used to value foreign securities.

Many securities markets and exchanges outside the United States close prior to the close of the New York Stock Exchange and therefore the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. Certain securities listed or traded on foreign securities exchanges are fair valued using a pricing model furnished by a third-party pricing service. The pricing service’s daily pricing model provides a security specific factor that is applied to the closing price of a security on the foreign market or exchange.

A more detailed discussion of asset valuation methods is included in the Statement of Additional Information.

Northwestern Mutual Series Fund, Inc. Prospectus 146

Taxes And Dividends

Shares of the Portfolios are offered only for funding Annuity Contracts and Life Insurance Policies offered by Northwestern Mutual through separate accounts. Insurance company separate accounts generally do not pay tax on dividends or capital gain distributions. Investors in Annuity Contracts and Life Insurance Policies should refer to the prospectuses for the variable products for a discussion of the tax considerations that affect the insurance company and its separate accounts and the tax consequences to investors in those products.

Each Portfolio is qualified or intends to qualify as a regulated investment company under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”) and intends to satisfy the diversification requirements of Section 817(h) of the Code and the Treasury Regulations promulgated thereunder, which generally prohibit a Portfolio from investing more than 55% of the value of its assets in any one investment, more than 70% of the value of its assets in any two investments, more than 80% of the value of its assets in any three investments, and more than 90% of the value of its assets in any four investments. For this purpose, all securities issued by the same issuer are treated as a single investment and each U.S. government agency or instrumentality is treated as a separate issuer. It is the Fund’s policy to comply with the provisions of the Code regarding distribution of investment income and capital gains so as to relieve each Portfolio from all, or substantially all, Federal income taxes. Each Portfolio expects to distribute all or substantially all net investment income and net capital gains, if any, from the sale of investments.

Shareholders of each Portfolio are entitled to receive such dividends from net investment income and distributions of net capital gains as the Board of Directors of the Fund may declare.

Dividends from net investment income and net capital gains will be declared for the Government Money Market Portfolio on each business day and annually for each of the other Portfolios. All dividends and capital gain distributions will be automatically reinvested in additional shares of a Portfolio at the NAV of such shares on the payment date unless the separate account is permitted to hold cash and elects to receive payment in cash. From time to time, a portion of a Portfolio’s dividends may constitute a return of capital.

Net investment income of each Portfolio will be determined at the close of trading on the New York Stock Exchange (the “Exchange”) on each day during which the Exchange is open for trading. Net investment income of each Portfolio consists of:

all dividends, interest income and discount earned by the Portfolio (including original issue and market discount);

net short-term capital gain; less

all expenses of the Portfolio.

The Statement of Additional Information contains further information about tax matters.

THE TAX STATUS OF YOUR INVESTMENT IN A PORTFOLIO DEPENDS UPON THE FEATURES OF YOUR ANNUITY CONTRACT OR LIFE INSURANCE POLICY. FOR FURTHER INFORMATION, PLEASE REFER TO THE PROSPECTUS FOR THE CONTRACT OR POLICY.

INVESTING IN THE PORTFOLIOS

Buying and Selling Shares

All of the outstanding shares of the Portfolios are owned either directly or indirectly by Northwestern Mutual. Shares of the Portfolios may be purchased and redeemed by Northwestern Mutual for its separate accounts that fund Annuity Contracts and Life Insurance Policies. Variable product owners, who own interests in the separate accounts, may not directly purchase and redeem shares of the Portfolios. Terms governing the purchase and sale of a variable product owner’s interest in a separate account are included in the variable product prospectus.

The Fund typically expects to pay out redemption proceeds requested by Northwestern Mutual within two days following receipt of a redemption request from Northwestern Mutual. Redemption requests are generally paid to Northwestern Mutual in cash, and transmitted by wire transfer. The Fund

typically expects to meet redemption requests through reliance on its holdings in cash or cash equivalents, and will employ this method of meeting redemption requests on a regular basis. The Fund reserves the right in its sole discretion to determine whether to satisfy redemption requests by making payment in securities (known as a redemption in kind). In such case, the Fund may pay all or part of the redemption in securities of equal value selected by the Fund in its sole discretion as permitted under the Investment Company Act of 1940, as amended, and the rules thereunder, and the redeeming shareholder will be responsible for disposing of securities and bearing any associated costs.

Pursuant to Rule 22e-3 adopted by the Securities and Exchange Commission, the Government Money Market Portfolio may suspend redemptions and postpone payment of redemption proceeds for longer than the seven-day limit set forth in Section

147 Northwestern Mutual Series Fund, Inc. Prospectus

22(e) of the Investment Company Act of 1940, as amended, pending a liquidation of the Portfolio which has been approved by the Fund’s Board in accordance with the conditions of the Rule.

Short Term and Excessive Trading

Short term and excessive trading (sometimes referred to as “market timing”) may present risks to a Portfolio’s long-term investors because it can, among other things, disrupt Portfolio investment strategies, increase Portfolio transaction and administrative costs, require higher than normal levels of cash reserves to fund unusually large or unexpected redemptions, and adversely affect investment performance. These risks may be greater for Portfolios that invest in securities that may be more vulnerable to arbitrage trading including foreign securities and thinly traded securities, such as small cap stocks and non-investment grade bonds. The International Growth Portfolio, the International Equity Portfolio, the Research International Core Portfolio and the Emerging Markets Equity Portfolio each has significant investments in foreign securities. Portfolios which may have significant investments in small cap securities include the Small Cap Growth Stock Portfolio, the Small Cap Value Portfolio and the Index 600 Stock Portfolio. Certain Portfolios, and in particular the High Yield Bond Portfolio, may have significant investments in high yield securities that are thinly traded. Please see the “Portfolio Summaries” at the beginning of this Prospectus. These types of trading activities also may dilute the value of long-term investors’ interests in a Portfolio if it calculates its net asset value using closing prices that are no longer accurate. Accordingly, we discourage market timing activities.

By their nature, insurance company separate accounts, for which purchases and sales of Portfolio shares by multiple investors are aggregated for presentation to the Fund on a net basis, conceal the identity of the individual investors from the Fund. This makes it more difficult for the Fund to identify market timing activity in the Portfolios. Consequently, to deter short term and excessive trading, the Fund’s Board of Directors has received and reviewed and determined to be reasonable policies and procedures adopted and implemented by Northwestern Mutual, which are designed to control abusive trading practices at the variable product owner level. Northwestern Mutual seeks to apply these policies and procedures uniformly to all investors, except to the extent it is prevented from doing so under applicable state or federal law or regulation. Any exceptions must be either expressly permitted by its policies and procedures or subject to an approval process described in them. Because exceptions are permitted, it is possible that investors may be treated differently and, as a result, some may be allowed to engage in trading activity that might be viewed as market timing. These policies and procedures are discussed below.

In addition, to minimize harm to the Fund and its investors, the Fund reserves the right to reject without notice any purchase order (including exchanges) from any investor who it believes has a history of abusive trading or whose trading, in its sole

judgment, has been or may be disruptive to investors in the Fund. Alternatively, the Fund reserves the right to accept purchases and exchanges in excess of Northwestern Mutual’s guidelines if it believes in its sole discretion that such transactions would not be inconsistent with the best interests of investors. In addition, the Fund seeks to deter abusive trading by using fair value pricing as described in the section “How Shares are Priced.”

Among the steps taken by Northwestern Mutual to reduce the frequency and effect of these abusive trading activities, are monitoring trading activity and imposing trading restrictions including the prohibition of more than twelve transfers among divisions under a single variable annuity contract or variable life insurance policy during a contract or policy year. A “division” is a sub-account of the separate account which corresponds to a Portfolio of the Fund. Multiple transfers with the same effective date made by the same investor will be counted as a single transfer for purposes of applying the twelve transfer limitation. Further, an investor who is identified as having made a transfer in and out of the same division, excluding the division that corresponds to the Government Money Market Portfolio (“round trip transfer”), in an amount in excess of $10,000 within fourteen calendar days will be restricted from making additional transfers after the third such round trip transfer until the next contract or policy anniversary date, and sent a letter informing him or her of the restriction. Thereafter, the same investor will be similarly restricted after the second such round trip transfer. An investor who is identified as having made one or more round trip transfers within thirty calendar days aggregating more than one percent (1%) of the total assets of the Portfolio underlying a division (excluding the division that corresponds to the Government Money Market Portfolio) will be sent a warning letter after the first such round trip transfer, and will be restricted from making additional transfers until the next contract or policy anniversary date after the second such round trip transfer. Thereafter, the same investor will be similarly restricted after the first such round trip transfer. These limitations do not apply to automatic asset transfers, scheduled or systematic transactions involving portfolio rebalancing, dollar cost averaging, or interest sweeps, or to initial allocations or changes in future allocations. Once an investor is restricted, he will be allowed one additional transfer into the division that underlies the Government Money Market Portfolio until the next contract or policy anniversary date. Additionally, in accordance with these procedures, Northwestern Mutual may modify some of these limitations to allow for transfers that would not count against the total transfer limit but only as necessary to alleviate any potential hardships to investors (e.g., in situations involving a substitution of a Portfolio as an investment option within Annuity Contracts and Life Insurance Policies).

Northwestern Mutual’s Life Insurance Policies may be purchased by a corporation or other entity as a means to informally finance the liabilities created by the entity’s employee benefit or similar plan. These policies may be aggregately managed to match liabilities under such plans.

Northwestern Mutual Series Fund, Inc. Prospectus 148

Policies sold under these circumstances may be subject to special transfer restrictions. Namely, transactions involving portfolio rebalancing programs may be exempt from the twelve transfer per contract or policy year limitation where: (1) the purpose of the portfolio rebalancing program is to match the policy to the entity’s employee benefit or similar plan; (2) the portfolio rebalancing program adequately protects against short-term or excessive trading; and (3) the portfolio rebalancing program is managed by a third party administrator that meets requirements established by Northwestern Mutual. Northwestern Mutual reserves the right to monitor or limit transactions involving portfolio rebalancing programs where it believes such transactions may be potentially harmful to a Portfolio.

If Northwestern Mutual believes an investor’s trading activity is in violation of, or inconsistent with, its policies and procedures or otherwise is potentially disruptive to the Fund or harmful to its investors’ interests, the investor may be asked to stop such activities and future purchases or exchanges by the investor may be rejected without prior notice. Because it retains discretion to determine what action is appropriate in a given situation, investors may be treated differently and some may be allowed to engage in activities that might be viewed as market timing.

These policies and procedures may change from time to time as the Fund and Northwestern Mutual determine in their sole discretion without notice; provided, however, investors would be given advance, written notice if the policies and procedures were revised to accommodate market timing.

The Fund’s Board of Directors intends to monitor events and obtain periodic reports from Northwestern Mutual on the effectiveness of its policies and procedures in order to identify whether instances of potentially abusive trading practices are occurring and what action, if any, should be taken in response. However, the Fund may not be able to identify all instances of abusive trading practices, nor completely eliminate the possibility of such activities.

Mixed Funding

The shares of each Portfolio of the Fund are offered only to Northwestern Mutual and its separate accounts that fund Annuity Contracts and Life Insurance Policies. When a Portfolio sells any of its shares to both variable annuity and variable life insurance separate accounts, it is said to engage in mixed funding. The Portfolios currently engage in mixed funding. Due to differences of tax treatment and other considerations, the interests of contract and policy owners in the Fund may conflict. The Board of Directors of the Fund will monitor events for any material irreconcilable conflicts that may arise and will determine what action, if any, should be taken in response. If a material conflict is identified, the Board may require one or more insurance separate accounts to withdraw its investment in the Fund, which may cause the Fund to sell securities at disadvantageous prices and disrupt orderly management of the Portfolio.

DISCLOSURE OF PORTFOLIO HOLDINGS

A description of the Fund’s policies and procedures with respect to the disclosure of the Fund’s portfolio securities is available in the Fund’s Statement of Additional Information. A list of the ten largest holdings for each Portfolio (other than the Government Money Market Portfolio), and the percentage of Portfolio net assets that each such holding represents as of the most recent calendar-quarter end, is normally posted on the internet at www.northwesternmutual.com. This information will be available on or before the 20th business day following the end of each calendar quarter. In addition, a list of each Portfolio’s full holdings is normally posted on or before the last day of the month following the end of each calendar quarter. The holdings information will remain on the website at least until such time as the Portfolio’s complete holdings for the calendar quarter are filed with the SEC. The Fund may from time to time withhold posting to or remove from the website any portion of this information with respect to a Portfolio. The information may be viewed by following one of the paths below and selecting the specific Portfolio you wish to view:

•

Life Insurance – https://www.northwesternmutual.com/life-insurance/variable-universal-life-insurance-vul/underlying-fund-information/prospectuses-performance-and-reports/or

•

Annuities – https://www.northwesternmutual.com/fixed-annuity-vs-variable-annuity/underlying-fund-information/

In addition, information concerning the Government Money Market Portfolio’s holdings, as well as its dollar-weighted average maturity and weighted average life, will be posted on the website five days after the end of each month and will remain posted on the website for six months thereafter. In addition, each day, six-month historical data regarding asset flows, shadow prices, and daily and weekly liquid assets will be posted on the website. The information can be found by following either of the paths shown above and selecting the Government Money Market Portfolio.

149 Northwestern Mutual Series Fund, Inc. Prospectus

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the Portfolios’ financial performance for the past five years (or, if shorter, the period of a Portfolio’s operations). Certain information reflects financial results for a single Portfolio share. The total returns in the table represent the rate that an investor would have earned or lost on an investment in a Portfolio (assuming reinvestment of all dividends and distributions). Total returns do not reflect the fees and expenses

separately charged by Annuity Contracts or Life Insurance Policies. If such fees and expenses were reflected, the total returns in the table would be lower. This information has been derived from financial statements audited by PricewaterhouseCoopers LLP, whose report, along with the Fund’s financial statements, are incorporated by reference in the Fund’s Statement of Additional Information, both of which are available upon request.

Northwestern Mutual Series Fund, Inc. Prospectus 150

FINANCIAL HIGHLIGHTS

(For a share outstanding through the period)

	Net Asset Value, Beginning of Period	Net Investment Income (Loss)#	Net Realized and Unrealized Gain (Loss) on Investments	Total from Investment Operations	Distributions from Net Investment Income	Distributions from Realized Gains on Investments	Total Distributions	Net Asset Value, End of Period	Total Return*	Net Assets, End of Period (thousands)	Ratio of Gross Expenses to Average Net Assets†	Ratio of Net Expenses to Average Net Assets†	Ratio of Net Investment Income (Loss) to Average Net Assets	Portfolio Turnover Rate
Growth Stock Portfolio
2024	$3.06	$0.00‡	$1.15	$1.15	$(0.00)‡	$—	$(0.00)‡	$4.21	37.82%	$1,369,524	0.42%	0.42%	0.10%	7%
2023	2.04	0.00‡	1.02	1.02	(0.00)‡	—	(0.00)‡	3.06	49.69	1,067,103	0.43	0.43	0.14	9
2022	4.04	0.00‡	(1.50)	(1.50)	—	(0.50)	(0.50)	2.04	(38.70)	750,703	0.43	0.43	0.04	14
2021	3.60	(0.00)‡	0.61	0.61	(0.00)‡	(0.17)	(0.17)	4.04	16.67	1,389,899	0.42	0.42	(0.10)	36
2020	3.18	0.00‡	1.04	1.04	(0.02)	(0.60)	(0.62)	3.60	34.97	1,286,403	0.43	0.42	0.00	24
Focused Appreciation Portfolio
2024	$3.87	$(0.00)‡	$1.26	$1.26	$—	$(0.40)	$(0.40)	$4.73	34.43%	$1,493,813	0.74%	0.61%	(0.02)%	9%
2023	2.72	(0.00)‡	1.38	1.38	—	(0.23)	(0.23)	3.87	50.99	1,279,119	0.74	0.62	(0.10)	7
2022	4.32	(0.00)‡	(1.19)	(1.19)	(0.00)‡	(0.41)	(0.41)	2.72	(27.83)	963,929	0.74	0.62	(0.03)	18
2021	4.02	(0.00)‡	0.76	0.76	(0.01)	(0.45)	(0.46)	4.32	18.90	1,327,361	0.74	0.62	(0.01)	11
2020	3.17	0.01	1.02	1.03	(0.02)	(0.16)	(0.18)	4.02	32.55	1,186,696	0.75	0.62	0.19	21
Large Cap Core Stock Portfolio
2024	$1.66	$0.01	$0.34	$0.35	$(0.01)	$(0.09)	$(0.10)	$1.91	22.16%	$756,794	0.44%	0.43%	0.64%	74%
2023	1.44	0.01	0.36	0.37	(0.02)	(0.13)	(0.15)	1.66	25.78	668,896	0.45	0.44	0.82	63
2022	2.21	0.02	(0.43)	(0.41)	(0.02)	(0.34)	(0.36)	1.44	(18.88)	566,195	0.44	0.44	0.94	55
2021	1.91	0.01	0.47	0.48	(0.02)	(0.16)	(0.18)	2.21	25.10	842,806	0.44	0.43	0.70	56
2020	1.62	0.02	0.34	0.36	(0.02)	(0.05)	(0.07)	1.91	22.74	719,977	0.45	0.44	0.98	72
Large Cap Blend Portfolio
2024	$1.19	$0.01	$0.25	$0.26	$(0.01)	$(0.32)	$(0.33)	$1.12	23.86%	$171,954	0.84%	0.74%	0.49%	50%
2023	1.08	0.01	0.21	0.22	(0.01)	(0.10)	(0.11)	1.19	20.61	187,733	0.82	0.75	0.75	119
2022	1.39	0.01	(0.21)	(0.20)	(0.01)	(0.10)	(0.11)	1.08	(13.78)	195,927	0.81	0.76	0.78	38
2021	1.25	0.01	0.22	0.23	(0.01)	(0.08)	(0.09)	1.39	18.46	203,126	0.81	0.78	0.68	19
2020	1.22	0.01	0.10	0.11	(0.06)	(0.02)	(0.08)	1.25	10.05	180,564	0.83	0.80	0.77	28
Index 500 Stock Portfolio
2024	$7.88	$0.11	$1.83	$1.94	$(0.11)	$(0.16)	$(0.27)	$9.55	24.75%	$6,562,773	0.21%	0.19%	1.19%	2%
2023	6.38	0.11	1.54	1.65	(0.10)	(0.05)	(0.15)	7.88	26.04	5,485,081	0.21	0.20	1.48	2
2022	8.18	0.10	(1.59)	(1.49)	(0.09)	(0.22)	(0.31)	6.38	(18.28)	4,465,914	0.21	0.20	1.41	2
2021	6.60	0.09	1.77	1.86	(0.09)	(0.19)	(0.28)	8.18	28.45	5,504,970	0.21	0.19	1.19	3
2020	5.79	0.09	0.94	1.03	(0.10)	(0.12)	(0.22)	6.60	18.18	4,419,729	0.21	0.20	1.63	5
Large Company Value Portfolio
2024	$0.80	$0.02	$0.07	$0.09	$(0.02)	$(0.03)	$(0.05)	$0.84	10.69%	$155,933	0.80%	0.75%	1.99%	40%
2023	0.92	0.02	0.01	0.03	(0.03)	(0.12)	(0.15)	0.80	3.80	151,998	0.80	0.75	2.07	36
2022	1.19	0.02	(0.03)	(0.01)	(0.04)	(0.22)	(0.26)	0.92	(0.34)	152,414	0.78	0.74	1.87	37
2021	1.00	0.02	0.19	0.21	(0.01)	(0.01)	(0.02)	1.19	21.92	227,560	0.76	0.74	1.63	40
2020	1.03	0.02	0.00‡	0.02	(0.02)	(0.03)	(0.05)	1.00	2.64	211,998	0.78	0.76	2.02	84
Domestic Equity Portfolio
2024	$1.58	$0.03	$0.08	$0.11	$(0.03)	$(0.13)	$(0.16)	$1.53	7.07%	$1,054,496	0.54%	0.50%	1.91%	31%
2023	1.63	0.03	0.02	0.05	(0.03)	(0.07)	(0.10)	1.58	3.71	1,057,066	0.54	0.50	2.04	23
2022	1.93	0.03	(0.10)	(0.07)	(0.03)	(0.20)	(0.23)	1.63	(2.99)	1,060,119	0.53	0.50	1.84	12
2021	1.64	0.03	0.33	0.36	(0.03)	(0.04)	(0.07)	1.93	22.71	1,096,677	0.53	0.50	1.77	29
2020	1.75	0.03	(0.04)	(0.01)	(0.03)	(0.07)	(0.10)	1.64	0.73	946,072	0.55	0.53	2.25	33

Calculated based on average shares outstanding during the period.

Total Return includes deductions for management and other fund expenses; excludes deductions for sales loads and account fees, not annualized for periods less than one year.

†

Expense ratios are based upon the direct and allocated expenses of the Portfolio and do not include the effect of underlying funds’ expenses. For additional information on underlying funds’ expenses, please refer to the Fee and Expense table in the Prospectus.

‡

Amount is less than $0.005.

151 Northwestern Mutual Series Fund, Inc. Prospectus

FINANCIAL HIGHLIGHTS (Continued)

(For a share outstanding through the period)

	Net Asset Value, Beginning of Period	Net Investment Income (Loss)#	Net Realized and Unrealized Gain (Loss) on Investments	Total from Investment Operations	Distributions from Net Investment Income	Distributions from Realized Gains on Investments	Total Distributions	Net Asset Value, End of Period	Total Return*	Net Assets, End of Period (thousands)	Ratio of Gross Expenses to Average Net Assets†	Ratio of Net Expenses to Average Net Assets†	Ratio of Net Investment Income (Loss) to Average Net Assets	Portfolio Turnover Rate
Equity Income Portfolio
2024	$1.66	$0.03	$0.17	$0.20	$(0.04)	$(0.07)	$(0.11)	$1.75	11.88%	$722,693	0.66%	0.57%	1.89%	24%
2023	1.69	0.04	0.11	0.15	(0.04)	(0.14)	(0.18)	1.66	9.68	717,491	0.66	0.57	2.24	18
2022	2.01	0.04	(0.10)	(0.06)	(0.04)	(0.22)	(0.26)	1.69	(3.22)	702,376	0.65	0.57	2.17	15
2021	1.63	0.03	0.39	0.42	(0.04)	—	(0.04)	2.01	25.70	867,936	0.65	0.57	1.74	18
2020	1.78	0.04	(0.05)	(0.01)	(0.07)	(0.07)	(0.14)	1.63	1.20	787,521	0.66	0.59	2.48	30
Mid Cap Growth Stock Portfolio
2024	$3.11	(0.00)‡	$0.25	$0.25	(0.00)‡	—	(0.00)‡	$3.36	8.21%	$1,027,872	0.54%	0.54%	(0.09)%	127%
2023	2.71	0.00‡	0.41	0.41	(0.01)	—	(0.01)	3.11	14.96	1,081,974	0.54	0.54	0.09	39
2022	3.94	0.01	(0.95)	(0.94)	(0.00)‡	(0.29)	(0.29)	2.71	(23.77)	1,008,774	0.53	0.53	0.23	46
2021	4.09	0.01	0.41	0.42	(0.01)	(0.56)	(0.57)	3.94	10.18	1,375,568	0.53	0.52	0.13	30
2020	3.42	0.01	0.82	0.83	(0.01)	(0.15)	(0.16)	4.09	25.41	1,344,564	0.54	0.54	0.18	47
Index 400 Stock Portfolio
2024	$2.17	$0.03	$0.26	$0.29	$(0.03)	$(0.08)	$(0.11)	$2.35	13.63%	$1,402,515	0.28%	0.24%	1.26%	16%
2023	1.97	0.03	0.29	0.32	(0.03)	(0.09)	(0.12)	2.17	16.15	1,290,814	0.28	0.25	1.42	19
2022	2.57	0.03	(0.38)	(0.35)	(0.02)	(0.23)	(0.25)	1.97	(13.26)	1,137,710	0.28	0.25	1.34	14
2021	2.15	0.03	0.49	0.52	(0.02)	(0.08)	(0.10)	2.57	24.46	1,335,937	0.27	0.24	1.03	20
2020	2.02	0.02	0.23	0.25	(0.03)	(0.09)	(0.12)	2.15	13.37	1,115,469	0.28	0.26	1.31	18
Mid Cap Value Portfolio
2024	$1.48	$0.03	$0.10	$0.13	$(0.03)	$(0.05)	$(0.08)	$1.53	8.65%	$632,435	0.88%	0.72%	2.04%	57%
2023	1.64	0.03	0.06	0.09	(0.04)	(0.21)	(0.25)	1.48	6.26	665,543	0.88	0.72	2.17	50
2022	2.00	0.04	(0.08)	(0.04)	(0.04)	(0.28)	(0.32)	1.64	(1.15)	650,964	0.88	0.72	2.10	74
2021	1.65	0.03	0.35	0.38	(0.02)	(0.01)	(0.03)	2.00	23.27	704,855	0.88	0.72	1.54	54
2020	1.65	0.03	—	0.03	(0.03)	—	(0.03)	1.65	1.67	600,403	0.89	0.75	1.79	76
Small Cap Growth Stock Portfolio
2024	$2.24	(0.00)‡	$0.30	$0.30	$(0.01)	—	$(0.01)	$2.53	13.18%	$733,031	0.56%	0.56%	(0.06)%	68%
2023	1.89	0.00‡	0.35	0.35	(0.00)‡	—	(0.00)‡	2.24	18.36	686,669	0.56	0.56	0.17	64
2022	3.22	0.00‡	(0.9)	(0.90)	—	(0.43)	(0.43)	1.89	(28.49)	594,877	0.56	0.56	0.05	52
2021	3.42	(0.00)‡	0.15	0.15	(0.00)‡	(0.35)	(0.35)	3.22	4.11	830,014	0.54	0.54	(0.06)	43
2020	2.72	0.00‡	0.86	0.86	(0.00)‡	(0.16)	(0.16)	3.42	33.47	840,446	0.56	0.56	0.10	60
Index 600 Stock Portfolio
2024	$1.53	$0.02	$0.10	$0.12	$(0.02)	$(0.03)	$(0.05)	$1.60	8.43%	$476,360	0.27%	0.27%	1.29%	19%
2023	1.39	0.02	0.20	0.22	(0.02)	(0.06)	(0.08)	1.53	15.76	437,546	0.28	0.28	1.45	25
2022	1.85	0.02	(0.32)	(0.30)	(0.02)	(0.14)	(0.16)	1.39	(16.37)	371,552	0.28	0.28	1.12	16
2021	1.50	0.02	0.37	0.39	(0.01)	(0.03)	(0.04)	1.85	26.22	434,426	0.27	0.27	1.28	22
2020	1.43	0.01	0.13	0.14	(0.02)	(0.05)	(0.07)	1.50	10.93	344,102	0.31	0.31	1.10	28
Small Cap Value Portfolio
2024	$1.91	$0.01	$0.19	$0.20	$(0.02)	$(0.07)	$(0.09)	$2.02	10.36%	$578,679	0.88%	0.87%	0.73%	32%
2023	1.81	0.02	0.22	0.24	(0.01)	(0.13)	(0.14)	1.91	13.85	575,849	0.88	0.87	0.82	29
2022	2.58	0.01	(0.48)	(0.47)	(0.01)	(0.29)	(0.30)	1.81	(18.53)	535,618	0.88	0.87	0.50	27
2021	2.20	0.01	0.49	0.50	(0.01)	(0.11)	(0.12)	2.58	23.00	685,304	0.87	0.86	0.27	22
2020	2.17	0.01	0.15	0.16	(0.01)	(0.12)	(0.13)	2.20	9.29	615,079	0.88	0.88	0.50	28

Calculated based on average shares outstanding during the period.

Total Return includes deductions for management and other fund expenses; excludes deductions for sales loads and account fees, not annualized for periods less than one year.

†

‡

Amount is less than $0.005.

Northwestern Mutual Series Fund, Inc. Prospectus 152

FINANCIAL HIGHLIGHTS (Continued)

(For a share outstanding through the period)

	Net Asset Value, Beginning of Period	Net Investment Income (Loss)#	Net Realized and Unrealized Gain (Loss) on Investments	Total from Investment Operations	Distributions from Net Investment Income	Distributions from Realized Gains on Investments	Total Distributions	Net Asset Value, End of Period	Total Return*	Net Assets, End of Period (thousands)	Ratio of Gross Expenses to Average Net Assets†	Ratio of Net Expenses to Average Net Assets†	Ratio of Net Investment Income (Loss) to Average Net Assets	Portfolio Turnover Rate
International Growth Portfolio
2024	$1.90	$0.02	$0.09	$0.11	$(0.02)	$(0.05)	$(0.07)	$1.94	5.30%	$1,044,160	0.61%	0.61%	0.80%	23%
2023	1.63	0.02	0.31	0.33	(0.02)	(0.04)	(0.06)	1.90	20.77	1,018,872	0.62	0.62	0.99	21
2022	2.40	0.02	(0.58)	(0.56)	(0.01)	(0.20)	(0.21)	1.63	(23.13)	893,048	0.62	0.62	0.84	15
2021	2.14	0.01	0.33	0.34	(0.01)	(0.07)	(0.08)	2.40	15.92	1,068,232	0.62	0.61	0.51	25
2020	1.85	0.01	0.32	0.33	(0.03)	(0.01)	(0.04)	2.14	17.91	924,242	0.63	0.63	0.64	21
Research International Core Portfolio
2024	$1.07	$0.02	$0.02	$0.04	$(0.02)	$(0.01)	$(0.03)	$1.08	3.25%	$858,304	0.79%	0.72%	1.77%	21%
2023	0.98	0.02	0.11	0.13	(0.02)	(0.02)	(0.04)	1.07	12.95	828,651	0.80	0.75	1.87	15
2022	1.29	0.02	(0.25)	(0.23)	(0.02)	(0.06)	(0.08)	0.98	(17.16)	744,073	0.80	0.75	1.83	25
2021	1.18	0.02	0.12	0.14	(0.01)	(0.02)	(0.03)	1.29	12.07	963,103	0.78	0.73	1.37	18
2020	1.08	0.01	0.13	0.14	(0.02)	(0.02)	(0.04)	1.18	13.46	891,001	0.81	0.76	1.36	25
International Equity Portfolio
2024	$1.58	$0.04	$0.02	$0.06	$(0.05)	—	$(0.05)	$1.59	3.94%	$1,877,350	0.68%	0.68%	2.52%	19%
2023	1.40	0.04	0.19	0.23	(0.05)	—	(0.05)	1.58	16.09	1,877,275	0.68	0.68	2.65	14
2022	1.59	0.04	(0.15)	(0.11)	(0.04)	(0.04)	(0.08)	1.40	(6.83)	1,726,196	0.69	0.63	2.69	13
2021	1.55	0.04	0.04	0.08	(0.04)	—	(0.04)	1.59	5.00	1,865,208	0.68	0.51	2.30	118
2020	1.65	0.04	(0.09)	(0.05)	(0.05)	—	(0.05)	1.55	(2.71)	1,779,819	0.68	0.54	2.59	65
Emerging Markets Equity Portfolio
2024	$0.93	$0.02	$0.02	$0.04	$(0.01)	—	$(0.01)	$0.96	4.02%	$1,044,151	1.08%	0.89%	1.66%	38%
2023	0.89	0.02	0.04	0.06	(0.02)	—	(0.02)	0.93	6.91	921,817	1.10	0.91	1.89	24
2022	1.32	0.01	(0.35)	(0.34)	(0.01)	(0.08)	(0.09)	0.89	(25.28)	854,238	1.09	0.91	1.29	33
2021	1.39	0.02	(0.08)	(0.06)	(0.01)	—	(0.01)	1.32	(4.55)	993,493	1.06	0.91	1.14	33
2020	1.12	0.01	0.28	0.29	(0.02)	—	(0.02)	1.39	26.86	1,024,098	1.10	0.95	0.67	31
Government Money Market Portfolio
2024	$1.00	$0.05	—	$0.05	$(0.05)	(0.00)‡	$(0.05)	$1.00	4.99%	$504,732	0.33%	0.33%	4.87%	—%
2023	1.00	0.05	—	0.05	(0.05)	(0.00)‡	(0.05)	1.00	4.83	526,384	0.33	0.33	4.72	—
2022	1.00	0.01	—	0.01	(0.01)	(0.00)‡	(0.01)	1.00	1.36	542,517	0.33	0.28**	1.40	—
2021	1.00	0.00‡	—	0.00‡	(0.00)‡	(0.00)‡	(0.00)‡	1.00	—	488,858	0.33	0.08**	0.00	—
2020	1.00	0.00‡	—	0.00‡	(0.00)‡	(0.00)‡	(0.00)‡	1.00	0.31	582,312	0.33	0.25**	0.26	—
Short-Term Bond Portfolio
2024	$1.02	$0.04	$0.02	$0.06	$(0.04)	—	$(0.04)	$1.04	5.04%	$390,253	0.40%	0.40%	4.13%	116%§
2023	0.99	0.03	0.02	0.05	(0.02)	—	(0.02)	1.02	5.26	385,232	0.38	0.38	3.38	56§
2022	1.05	0.02	(0.07)	(0.05)	(0.01)	(0.00)‡	(0.01)	0.99	(4.52)	382,738	0.38	0.38	1.90	54§
2021	1.08	0.01	(0.02)	(0.01)	(0.02)	(0.00)‡	(0.02)	1.05	(0.10)	412,284	0.38	0.38	1.27	46§
2020	1.06	0.02	0.02	0.04	(0.02)	—	(0.02)	1.08	4.29	383,608	0.39	0.39	1.96	49§
Select Bond Portfolio
2024	$1.10	$0.05	$(0.03)	$0.02	$(0.04)	—	$(0.04)	$1.08	1.76%	$2,804,436	0.31%	0.31%	4.33%	234%§
2023	1.07	0.04	0.02	0.06	(0.03)	—	(0.03)	1.10	6.19	2,903,697	0.31	0.31	3.86	248§
2022	1.26	0.03	(0.20)	(0.17)	(0.02)	(0.00)‡	(0.02)	1.07	(13.33)	2,786,616	0.31	0.31	2.30	275§
2021	1.37	0.02	(0.04)	(0.02)	(0.03)	(0.06)	(0.09)	1.26	(1.59)	3,428,416	0.31	0.30	1.15	272§
2020	1.30	0.02	0.10	0.12	(0.04)	(0.01)	(0.05)	1.37	8.98	3,404,268	0.31	0.30	1.75	340§

Calculated based on average shares outstanding during the period.

Total Return includes deductions for management and other fund expenses; excludes deductions for sales loads and account fees, not annualized for periods less than one year.

During the years ended December 31, 2022, 2021 and 2020, MSA voluntarily agreed to waive a portion of its advisory fee to maintain a positive yield in the Government Money Market Portfolio. The Government Money Market Portfolio's net expense ratio would increase by an amount of 0.04%, 0.25% and 0.08%, respectively, if such voluntary waiver were excluded for the years ended December 31, 2022, 2021 and 2020.

†

‡

Amount is less than $0.005.

Portfolio Turnover Rate excludes the impact of TBA transactions.

153 Northwestern Mutual Series Fund, Inc. Prospectus

FINANCIAL HIGHLIGHTS (Continued)

(For a share outstanding through the period)

	Net Asset Value, Beginning of Period	Net Investment Income (Loss)#	Net Realized and Unrealized Gain (Loss) on Investments	Total from Investment Operations	Distributions from Net Investment Income	Distributions from Realized Gains on Investments	Total Distributions	Net Asset Value, End of Period	Total Return*	Net Assets, End of Period (thousands)	Ratio of Gross Expenses to Average Net Assets†	Ratio of Net Expenses to Average Net Assets†	Ratio of Net Investment Income (Loss) to Average Net Assets	Portfolio Turnover Rate
Long-Term U.S. Government Bond Portfolio**
2024	$0.66	$0.02	$(0.06)	$(0.04)	$(0.02)	—	$(0.02)	$0.60	(5.78)%	$114,458	2.73%**	2.68%**	2.76%	44%§
2023	0.65	0.02	0.01	0.03	(0.02)	—	(0.02)	0.66	3.33	121,049	2.21**	2.16**	2.67	32§
2022	0.94	0.02	(0.30)	(0.28)	(0.01)	—	(0.01)	0.65	(29.53)	100,157	1.02**	0.98**	2.49	27§
2021	1.21	0.02	(0.08)	(0.06)	(0.01)	(0.20)	(0.21)	0.94	(5.37)	138,869	0.67**	0.67**	1.73	28§
2020	1.12	0.02	0.17	0.19	(0.02)	(0.08)	(0.10)	1.21	17.37	153,933	0.94**	0.94**	1.61	157§
Inflation Managed Portfolio (formerly Inflation Protection Portfolio)
2024	$1.04	$0.03	$(0.02)	$0.01	$(0.03)	—	$(0.03)	$1.02	1.96%	$408,498	0.59%	0.45%	3.22%	50%
2023	1.05	0.03	0.01	0.04	(0.05)	—	(0.05)	1.04	3.90	417,289	0.58	0.52	3.06	41§
2022	1.28	0.05	(0.21)	(0.16)	(0.04)	(0.03)	(0.07)	1.05	(12.96)	423,548	0.57	0.54	4.44	51
2021	1.21	0.04	0.04	0.08	(0.01)	(0.00)‡	(0.01)	1.28	6.61	513,931	0.56	0.53	3.17	78
2020	1.13	0.02	0.08	0.10	(0.02)	—	(0.02)	1.21	9.57	423,389	0.58	0.55	1.34	56
High Yield Bond Portfolio
2024	$0.67	$0.04	—	$0.04	$(0.04)	—	$(0.04)	$0.67	6.38%	$695,777	0.46%	0.46%	5.91%	26%
2023	0.63	0.04	0.04	0.08	(0.04)	—	(0.04)	0.67	13.24	744,344	0.45	0.45	6.12	17
2022	0.75	0.04	(0.12)	(0.08)	(0.04)	—	(0.04)	0.63	(11.33)	689,405	0.45	0.45	5.54	19
2021	0.75	0.04	—	0.04	(0.04)	—	(0.04)	0.75	5.31	842,332	0.44	0.44	4.87	35
2020	0.75	0.04	—	0.04	(0.04)	—	(0.04)	0.75	6.64	825,203	0.45	0.45	5.36	42
Multi-Sector Bond Portfolio**
2024	$0.97	$0.05	$0.02	$0.07	$(0.05)	—	$(0.05)	$0.99	6.42%	$1,305,012	0.86%**	0.75%**	5.13%	34%§
2023	0.91	0.04	0.04	0.08	(0.02)	—	(0.02)	0.97	9.71	1,199,679	0.83**	0.73**	4.53	26§
2022	1.13	0.03	(0.21)	(0.18)	(0.04)	(0.00)‡	(0.04)	0.91	(15.39)	1,112,579	0.81**	0.72**	3.48	18
2021	1.16	0.03	(0.03)	0.00‡	(0.02)	(0.01)	(0.03)	1.13	(0.08)	1,316,651	0.81**	0.71**	2.90	21
2020	1.14	0.04	0.03	0.07	(0.05)	(0.00)‡	(0.05)	1.16	6.13	1,148,511	0.82**	0.73**	3.23	30§
Active/Passive Balanced Portfolio (formerly Balanced Portfolio)
2024	$1.29	$0.04	$0.06	$0.10	$(0.03)	$(0.03)	$(0.06)	$1.33	7.43%	$1,915,820	0.31%	0.09%	2.73%	29%
2023	1.21	0.03	0.13	0.16	(0.03)	(0.05)	(0.08)	1.29	13.07	1,962,442	0.31	0.06	2.15	9
2022	1.57	0.02	(0.24)	(0.22)	(0.05)	(0.09)	(0.14)	1.21	(14.14)	1,883,127	0.31	0.06	1.54	30
2021	1.57	0.02	0.10	0.12	(0.04)	(0.08)	(0.12)	1.57	7.56	2,381,573	0.31	0.06	1.51	20
2020	1.49	0.04	0.13	0.17	(0.04)	(0.05)	(0.09)	1.57	12.49	2,367,387	0.31	0.06	2.40	28
Active/Passive Moderate Portfolio (formerly Asset Alloction Portfolio)
2024	$1.08	$0.03	$0.07	$0.10	$(0.02)	$(0.04)	$(0.06)	$1.12	9.72%	$272,773	0.58%	0.13%	2.29%	26%
2023	1.01	0.02	0.14	0.16	(0.02)	(0.07)	(0.09)	1.08	15.24	273,823	0.58	0.10	1.95	11
2022	1.33	0.02	(0.23)	(0.21)	(0.03)	(0.08)	(0.11)	1.01	(14.83)	257,699	0.57	0.09	1.46	35
2021	1.29	0.02	0.12	0.14	(0.03)	(0.07)	(0.10)	1.33	10.45	320,737	0.55	0.09	1.37	18
2020	1.22	0.03	0.12	0.15	(0.03)	(0.05)	(0.08)	1.29	13.43	306,692	0.57	0.09	2.32	29

Calculated on average shares outstanding during the period.

Total Return includes deductions for management and other fund expenses; excludes deductions for sales loads and account fees, not annualized for periods less than one year.

†

The ratios of gross expenses to average net assets and net expenses to average net assets include interest expense. Excluding interest expense, the ratios for the Long-Term U.S. Government Portfolio would be be 0.70% and 0.65% respectively for the period ended December 31, 2024, 0.69% and 0.65% respectively in 2023, 0.68% and 0.65% respectively in 2022, 0.65% and 0.65% respectively in 2021, and 0.64% and 0.64% respectively in 2020. The ratios for the Multi-Sector Bond Portfolio would be 0.82% and 0.72% respectively for the period ended December 31, 2024, 0.83% and 0.73% respectively in 2023, 0.81% and 0.71% respectively in 2022, 0.80% and 0.71% respectively in 2021, and 0.81% and 0.72% respectively in 2020.

Portfolio Turnover Rate excludes the impact of TBA transactions.

‡

Amount is less than $0.005.

Northwestern Mutual Series Fund, Inc. Prospectus 154

APPENDIX A

DESCRIPTIONS OF BENCHMARKS AND OTHER INDICES

The following indices are used to illustrate investment market, sector or style performance or to serve as Portfolio performance comparisons for the various Portfolios. Unlike the Portfolios, the indices are not professionally managed and do not incur fees or expenses. It is not possible to invest directly in an index.

1∕3 each: Bloomberg® Global Aggregate—Credit Component ex Emerging Markets, Hedged USD; ICE BofA Global High-Yield BB-B Rated Constrained Developed Markets Index, Hedged USD; and JPMorgan® EMBI Global—The benchmark is an equally weighted blend of the following three indices: Bloomberg® Global Aggregate—Credit Component ex Emerging Markets, Hedged USD; ICE BofA Global High Yield BB-B Rated Constrained Developed Markets Index, Hedged USD; and JPMorgan® EMBI Global. The Bloomberg® Global Aggregate—Credit Component ex Emerging Markets, Hedged USD Index provides a broad-based measure of the global developed markets investment-grade fixed income markets. The ICE BofA Global High Yield BB-B Rated Constrained Developed Markets Index, Hedged USD tracks the performance of below investment-grade bonds of corporate issuers domiciled in developed market countries rated BB1 through B3, based on an average of Moody’s, S&P and Fitch. Qualifying bonds are capitalization-weighted provided the total allocation to an individual issuer (defined by Bloomberg tickers) does not exceed 2%. Issuers that exceed the limit are reduced to 2% and the face value of each of their bonds is adjusted on a pro-rata basis. Similarly, the face value of bonds of all other issuers that fall below the 2% cap are increased on a pro-basis. The index is re-balanced on the last calendar day of the month. The JPMorgan® EMBI Global tracks total returns for U.S. dollar-denominated debt instruments issued by emerging market sovereign and quasi-sovereign entities, Brady bonds, loans, Eurobonds and local market instruments. It is not possible to invest in an unmanaged index.

Active/Passive Balanced Portfolio Blended Composite Benchmark—The Active/Passive Balanced Portfolio Blended Composite Benchmark is an unmanaged, hypothetical combination of unmanaged indices that correspond to the Active/Passive Balanced Portfolio’s model allocation and consists of the S&P 500® Index (17%), S&P MidCap 400® Index (5%), S&P SmallCap 600® Index (3%), MSCI® EAFE Index (10%), MSCI® Emerging Markets Index (5%), Dow Jones U.S. Select REIT Index (4%), Bloomberg® Commodity IndexSM (4%), Bloomberg® Barclays U.S. Aggregate Bond Index (50%) and ICE BofA® US 3-Month Treasury Bill Index (2%).

Active/Passive Moderate Portfolio Blended Composite Benchmark—The Active/Passive Moderate Portfolio Blended Composite Benchmark is an unmanaged, hypothetical combination of unmanaged indices that correspond to the

Active/Passive Moderate Portfolio’s model allocation and consists of the S&P 500® Index (28%), S&P 400® MidCap Index (7%), S&P SmallCap 600 Index (3%), MSCI® EAFE Index (15%), MSCI® Emerging Markets Index (6%), Dow Jones U.S. Select REIT Index (4%), Bloomberg® Commodity IndexSM (5%), Bloomberg® Barclays U.S. Aggregate Bond Index (30%) and ICE BofA® US 3-Month Treasury Bill Index (2%).

Bloomberg® 1-3 Year U.S. Government/Credit Bond Index—The Bloomberg® 1-3 Year U.S. Government/Credit Bond Index is an unmanaged index of publicly issued medium and larger issues of U.S. government, investment-grade corporate, and investment-grade international dollar-denominated bonds that have maturities of between 1 and 3 years.

Bloomberg® U.S. Aggregate Bond Index—The Bloomberg® U.S. Aggregate Bond Index is an unmanaged index of publicly issued investment-grade fixed-rate debt securities including corporate, U.S. Treasury and government agency securities, mortgage pass-through and asset-backed securities with remaining maturities of at least one year regardless of call features.

Bloomberg® U.S. Corporate High Yield 2% Issuer Capped Index—The Bloomberg® U. S. Corporate High Yield 2% Issuer Capped Index is an unmanaged index of U.S. Dollar-denominated, non-convertible, fixed-rate, noninvestment-grade debt. Issuers are capped at 2% of the Index. Index holdings must have at least one year to final maturity, at least $150 million par amount outstanding, and be publicly issued with a rating of Ba1 or lower.

Bloomberg® Global Aggregate (Hedged USD) Index— The Bloomberg® Global Aggregate (Hedged USD) Index is an unmanaged index that measures global investment grade debt, composed of government, government-related, and corporate bonds, as well as asset-backed, mortgage-backed and commercial mortgage-backed securities from both developed and emerging markets issuers, and is 100% hedged to the U.S. dollar.

Bloomberg® Long-Term U.S. Treasury Index—The Bloomberg® Long-Term U.S. Treasury Index is an unmanaged index comprised of fixed-income securities with various maturities greater than 10 years.

Bloomberg® U.S. Treasury Inflation Protected Securities (TIPS) Index—The Bloomberg® U.S. Treasury Inflation Protected Securities (TIPS) Index is an unmanaged index of inflation-protected public obligations of the U.S. Treasury. The index is market capitalization weighted and includes all publicly-issued U.S. Treasury Inflation-Protected Securities that have at least one year remaining to maturity and have $250 million or more of outstanding face value.

155 Northwestern Mutual Series Fund, Inc. Prospectus

ICE BofA US 3-Month Treasury Bill Index—The ICE BofA US 3-Month Treasury Bill Index is comprised of a single issue purchased at the beginning of the month and held for a full month. At the end of the month that issue is sold and rolled into a newly selected issue. The issue selected at each month-end rebalancing is the outstanding Treasury Bill that matures closest to, but not beyond, three months from the rebalancing date. To qualify for selection, an issue must have settled on or before the month-end rebalancing date.

MSCI® All Country World (ex-US) Index—The MSCI® All Country World (ex-US) Index is an unmanaged, free float-adjusted market capitalization-weighted index that is designed to measure equity performance of companies in the developed and emerging markets, excluding the U.S.

MSCI® All Country World (ex-US) Growth Index—The MSCI® All Country World (ex-US) Growth Index is an unmanaged, free float-adjusted market capitalization-weighted index that is designed to measure equity performance of companies in the developed and emerging markets, excluding the U.S., with higher historical and forecasted growth characteristics.

MSCI® All Country World (ex-US) Value Index—The MSCI® All Country World (ex-US) Value Index is an unmanaged, free float-adjusted market capitalization-weighted index that is designed to measure equity performance of companies in the developed and emerging markets, excluding the U.S., which captures large and mid cap securities exhibiting overall value style characteristics.

MSCI EAFE® (Europe-Australasia-Far-East) Index—The MSCI EAFE® (“Europe-Australasia-Far East”) Index is an unmanaged, free float-adjusted, market capitalization-weighted index that is designed to measure developed market equity performance, excluding the U.S. & Canada.

MSCI EAFE® (Europe-Australasia-Far-East) Growth Index—The MSCI EAFE® (“Europe-Australasia-Far East”) Index is an unmanaged, free float-adjusted, market capitalization-weighted index that is designed to measure equity performance of companies in the developed markets, excluding the U.S. & Canada, with higher historical and forecasted growth characteristics.

MSCI® Emerging Markets Index—The MSCI® Emerging Markets Index is an unmanaged, free float-adjusted, market capitalization-weighted index that is designed to measure equity market performance in the global emerging markets.

Russell 1000® Growth Index—The Russell 1000® Growth Index is an unmanaged index that measures the performance of those companies in the Russell 1000® Index with higher price-to-book ratios and higher forecasted growth values.

Russell 1000® Value Index—The Russell 1000® Value Index is an unmanaged index that measures the performance of those companies in the Russell 1000® Index with lower price-to-book ratios and lower forecasted growth values.

Russell 2000® Growth Index—The Russell 2000® Growth Index is an unmanaged index that measures the performance of those companies in the Russell 2000® Index with higher price-to-book ratios and higher forecasted growth values.

Russell 2000® Value Index—The Russell 2000® Value Index is an unmanaged index that measures the performance of those companies in the Russell 2000® Index with lower price-to-book ratios and lower forecasted growth values.

Russell MidCap® Growth Index—The Russell MidCap® Growth Index is an unmanaged index that measures the performance of the Russell MidCap® companies with higher price-to-book ratios and higher forecasted growth values.

Russell MidCap® Value Index—The Russell MidCap® Value Index is an unmanaged index that measures the performance of the Russell MidCap® companies with lower price-to-book and lower forecasted growth values.

S&P 500® Index—The S&P 500® Composite Stock Price Index is an unmanaged, capitalization-weighted index of 500 selected common stocks designed to measure the performance of the broad domestic economy.

S&P MidCap 400® Index—The S&P MidCap 400® Index is an unmanaged, capitalization-weighted index that measures the performance of the mid-range sector of the U.S. stock market.

S&P SmallCap 600® Index—The S&P SmallCap 600® Index is an unmanaged index of 600 selected common stocks of U.S.-based companies with small market capitalizations.

Northwestern Mutual Series Fund, Inc. Prospectus 156

More information about Northwestern Mutual Series Fund, Inc. is included in the Fund’s Statement of Additional Information (SAI), incorporated by reference in this Prospectus, which is available free of charge.

More information about the Fund’s investments is included in the Fund’s annual and semi-annual reports to shareholders and in Form N-CSR. In the Fund’s annual report, you will find a discussion of the market conditions and investment strategies that significantly impacted the Fund’s performance during the last fiscal year. In Form N-CSR, you will find the Fund’s annual and semi-annual financial statements.

To request a free copy of the Fund’s SAI, or current annual or semi-annual report, to request other information about the Fund and to make shareholder inquiries, call us at (866) 910-1232. In addition, the Fund’s SAI and current annual or semi-annual report, and other information about the Fund, are available free of charge at www.nmseriesfund.com. Reports and other information about the Fund are available on the EDGAR Database on the SEC’s Internet site at http://www.sec.gov. Copies of this information may be obtained, upon payment of a duplicating fee, by electronic request at publicinfo@sec.gov.

Investment Company Act File No. 811-3990

STATEMENT OF ADDITIONAL INFORMATION

Dated May 1, 2025

NORTHWESTERN MUTUAL SERIES FUND, INC.

Consisting of

EQUITY PORTFOLIOS

GROWTH STOCK PORTFOLIO
FOCUSED APPRECIATION PORTFOLIO
LARGE CAP CORE STOCK PORTFOLIO
LARGE CAP BLEND PORTFOLIO
INDEX 500 STOCK PORTFOLIO
LARGE COMPANY VALUE PORTFOLIO
DOMESTIC EQUITY PORTFOLIO
EQUITY INCOME PORTFOLIO

MID CAP GROWTH STOCK PORTFOLIO
INDEX 400 STOCK PORTFOLIO
MID CAP VALUE PORTFOLIO

SMALL CAP GROWTH STOCK PORTFOLIO
INDEX 600 STOCK PORTFOLIO
SMALL CAP VALUE PORTFOLIO

INTERNATIONAL PORTFOLIOS

INTERNATIONAL GROWTH PORTFOLIO
RESEARCH INTERNATIONAL CORE PORTFOLIO
INTERNATIONAL EQUITY PORTFOLIO
EMERGING MARKETS EQUITY PORTFOLIO

FIXED INCOME PORTFOLIOS

GOVERNMENT MONEY MARKET PORTFOLIO
SHORT-TERM BOND PORTFOLIO
SELECT BOND PORTFOLIO
LONG-TERM U.S. GOVERNMENT BOND PORTFOLIO
INFLATION MANAGED PORTFOLIO (formerly Inflation Protection Portfolio)
HIGH YIELD BOND PORTFOLIO
MULTI-SECTOR BOND PORTFOLIO

ALLOCATION PORTFOLIOS

ACTIVE/PASSIVE BALANCED PORTFOLIO (formerly Balanced Portfolio)
ACTIVE/PASSIVE MODERATE ALLOCATION PORTFOLIO (formerly Asset Allocation Portfolio)

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This Statement of Additional Information (“SAI”) is not a prospectus but supplements and should be read in conjunction with the Prospectus for the Northwestern Mutual Series Fund, Inc. (the “Fund”), dated May 1, 2025. A free copy of the Prospectus, or current Annual or Semi-Annual Report to Shareholders, may be obtained from The Northwestern Mutual Life Insurance Company, 720 East Wisconsin Avenue, Milwaukee, Wisconsin 53202, telephone number (866) 910-1232. This SAI relates to each series portfolio listed above (each, a “Portfolio” and together, the “Portfolios”).

The financial statements of the Fund and the report of the independent registered public accounting firm thereon are incorporated by reference into this SAI from the Fund’s most recent annual Certified Shareholder Report on Form N-CSR. See “Financial Statements”. No other information is incorporated by reference.

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INVESTMENT POLICIES

The following information supplements the discussion of investment objectives, strategies and risks in the Fund’s Prospectus. A Portfolio’s policies that are designated as fundamental policies cannot be changed without the majority approval of shareholders as defined in the Investment Company Act of 1940 (“1940 Act”), meaning approval by the lesser of (1) the holders of 67% or more of a Portfolio’s shares represented at a meeting of shareholders at which the holders of at least 50% of the Fund’s outstanding shares are present in person or by proxy or (2) more than 50% of the Fund’s outstanding shares. Other policies may be changed without shareholder approval.

Investment Restrictions

With the exception of a Fund’s limitation on borrowing, investment restrictions that are expressed as a percentage limitation are not considered violated unless the limitation is exceeded by virtue of an acquisition of securities or assets or borrowings. The calculation of total assets for purposes of applying an investment restriction is determined exclusive of any cash collateral held in connection with securities lending activities. Currently the Fund does not avail itself of any SEC exemptive orders or no action letters relieving it from limitations in its investment restrictions, except an exemption from the limitation on industry concentration for its Index 400, Index 500 and Index 600 Stock Portfolios permitting those Portfolios to exceed the limitation to the extent necessary to replicate the indices used as their respective benchmarks.

Fundamental Policies. The following investments are designated as fundamental policies.

Industry Concentration. Each Portfolio, other than the Index 500 Stock Portfolio, the Index 400 Stock Portfolio and the Index 600 Stock Portfolio will not purchase securities if, as a result of such purchase, the Portfolio’s investments would be concentrated, within the meaning of the 1940 Act, and the rules and regulations thereunder, in securities of issuers in a particular industry or group of industries. (Note: For purposes of this limitation, the Fund generally relies on industry classifications published by Bloomberg L.P. To the extent the Fund determines the characteristics of companies within a particular Bloomberg classification to be materially different, it may further classify issues in accordance with the Standard Industrial Classification codes used by the SEC. Investments in other investment companies shall not be considered an investment in any industry or group of industries for purposes of this restriction. This investment restriction shall not apply to securities issued or guaranteed by the U.S. government or any of its agencies or instrumentalities. Currency positions are not considered to be an investment in a foreign government for industry concentration purposes.)

Loans. A Portfolio may not make loans to other persons, except to the extent permitted by the 1940 Act and the rules and regulations thereunder, and pursuant to any exemptive relief granted by the SEC. (Note: This restriction shall not prevent a Portfolio from making loans (a) through the lending of its portfolio securities, (b) through the purchase of debt securities, loan participations and/or engaging in direct corporate loans in accordance with its investment objectives and policies, (c) to the extent the entry into a repurchase agreement is deemed to be a loan, or (d) to affiliated investment companies to the extent permitted by the 1940 Act and the rules and regulations thereunder, or any exemptions therefrom that may be granted by the SEC. The Portfolios’ policies regarding the lending of portfolio securities are described elsewhere in this SAI. The Portfolios may not make loans to affiliated investment companies, except upon receipt of an exemptive order from the SEC.)

Securities Underwriting. A Portfolio may not engage in the business of underwriting the securities of other issuers, except as permitted by the 1940 Act and the rules and regulations thereunder, or pursuant to any exemptive order that may be granted by the SEC. (Note: This restriction does not prevent a Portfolio from engaging in transactions involving the acquisition, disposition or resale of securities, regardless of whether the Portfolio may be considered an underwriter under the Securities Act of 1933, as amended, and does not prevent a Portfolio from selling its own shares.)

Real Estate. A Portfolio may not purchase or sell real estate. (Note: This restriction does not prevent a Portfolio from investing in securities issued by companies, including real estate investment trusts, which invest in real estate or interests therein.)

Commodities. A Portfolio may not purchase or sell commodities except to the extent permitted by the 1940 Act or other governing statute, by the rules thereunder, or by the SEC or other regulatory agency with authority over the Portfolio.

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Senior Securities. A Portfolio may not issue securities senior to the presently authorized shares of the Portfolio except to the extent permitted by the 1940 Act and the rules and regulations thereunder. (Note: This restriction shall not be deemed to prohibit a Portfolio from engaging in derivatives transactions in accordance with the Series Fund Rule 18f-4 derivatives risk management program, as discussed in the “Rule 18f-4 Program Concerning Derivatives Usage” section of this SAI, below).

Borrowing. A Portfolio may not borrow money, except that a Portfolio may borrow money to the extent permitted by the 1940 Act and the rules and regulations thereunder, or to the extent permitted by any exemptive relief that may be granted by the SEC. (Note: A Portfolio’s borrowings for leverage and investment are further limited by its operating policies discussed below.)

Diversification. All of the Portfolios, except the Focused Appreciation Portfolio, are classified as diversified investment companies as defined under the 1940 Act. The Focused Appreciation Portfolio is classified as a non-diversified investment company as defined under the 1940 Act. (Note: The term “non-diversified,” means that more than 25% of a Portfolio’s total assets may be invested in securities (excluding cash, government securities and securities of other investment companies) each of which represents more than 5% of such Portfolio’s total assets or more than 10% of such securities’ outstanding voting securities.) Any Portfolio that is non-diversified under the 1940 Act would still intend to comply with the applicable asset diversification requirements under the Internal Revenue Code of 1986, as amended, discussed in this SAI under “Taxes.”

For purposes of applying Fundamental Investment Restriction number 1, the Fund considers a Portfolio’s investments to be “concentrated” in a particular industry if more than 25% of the Portfolio’s total assets are invested in that industry as classified by Bloomberg L.P. and/or as otherwise provided in the parenthetical note to the restriction. The Fund will also apply its concentration limitation in a manner that capture’s a Portfolio’s economic exposure to an industry by virtue of its investments in derivative securities (i.e., by looking through to the reference instrument that underlies the derivative securities). Because the Index 500 Stock Portfolio, the Index 400 Stock Portfolio and the Index 600 Stock Portfolio each pursues an investment strategy which is focused on achieving full replication of the Portfolio’s reference benchmark index, the investments in these Portfolios will be concentrated in a particular industry to the extent that the industry concentration exists in the reference benchmark index. Additionally, the Fund considers the holdings of the other investment companies in which the Portfolios invest to the extent it has sufficient information about such holdings in applying its concentration limitation.

With respect to Fundamental Restriction numbers 6 and 7, section 18(f) of the 1940 Act provides that it shall be unlawful for any registered open-end fund to issue any class of senior security or to sell any senior security, except that the fund may borrow from a bank if the fund maintains at least 300% asset coverage over all such bank borrowings. Notwithstanding the requirements of section 18(f), pursuant to SEC Rule 18f-4 the Fund may enter into reverse repurchase agreements or similar financing transactions if: (i) the Fund complies with the asset coverage requirements of section 18 and combines the aggregate amount of indebtedness associated with all reverse repurchase agreements or similar financing transactions with the aggregate amount of any other senior securities representing indebtedness when calculating the asset coverage ratio; or (ii) the Fund treats all reverse repurchase agreements or similar financing transactions as derivatives transactions. Pursuant to its Rule 18f-4 derivatives risk management program, the Fund has elected to treat all reverse repurchase agreements or similar financing transactions as derivative transactions.

For purposes of applying Fundamental Restriction number 8, with respect to 75% of the value of a Portfolio's total assets shall be represented by cash and cash items (including receivables), Government securities, securities of other investment companies, and other securities for the purpose of this calculation limited in respect of any one issuer to an amount not greater in value than 5% of the value of the total assets of such Portfolio and to not more than 10% of the outstanding voting securities of such issuer, subject to any rules, regulations or amendments thereto or as may be interpreted from time to time by the SEC staff and or any applicable no-action exemptive or similar relief.

Operating Policies

The investment restrictions of the Portfolios set forth in this section are operating policies which may be changed without shareholder approval.

Investment Companies. A Portfolio may not purchase the securities of any other investment company, except in compliance with the 1940 Act and applicable regulations promulgated thereunder. Further, the Growth Stock

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Portfolio, Focused Appreciation Portfolio, Large Cap Core Stock Portfolio, Large Cap Blend Portfolio, Index 500 Stock Portfolio, Large Company Value Portfolio, Domestic Equity Portfolio, Equity Income Portfolio, Mid Cap Growth Stock Portfolio, Index 400 Stock Portfolio, Mid Cap Value Portfolio, Small Cap Growth Stock Portfolio, Index 600 Stock Portfolio, Small Cap Value Portfolio, International Growth Portfolio, Research International Core Portfolio, International Equity Portfolio, Emerging Markets Equity Portfolio, Select Bond Portfolio, Short-Term Bond Portfolio, High Yield Bond Portfolio, Government Money Market Portfolio, Long-Term U.S. Government Bond Portfolio, Inflation Managed Portfolio, and Multi-Sector Bond Portfolio may not, as a non-fundamental policy, acquire any securities of registered open-end investment companies or registered unit investment trusts in reliance on Sections 12(d)(1)(F) or (G) of the 1940 Act.

Illiquid Investments. A Portfolio may not purchase illiquid securities if, as a result, more than 15% of its net assets would be invested in such securities. For the Government Money Market Portfolio the limit is 5%.

Margin Transactions. A Portfolio may not purchase securities on margin, except to the extent permitted under the 1940 Act. A Portfolio may obtain such short-term credits as are necessary for the clearance of transactions; and provided that margin deposits in connection with futures contracts, options on futures contracts, or other derivative instruments shall not constitute purchasing securities on margin.

Borrowing for Leverage and Investment Purposes. A Portfolio may not borrow money for purposes of leverage or investment in excess of 15% of its total assets. (Note: This restriction relates only to borrowing money. Restrictions relating to certain derivatives strategies that may be deemed leverage are governed by Fundamental Investment Restriction number 6 above, relating to Senior Securities.)

Repurchase Agreements. A Portfolio may not invest more than 10% of its total assets in repurchase agreements which have maturities of more than seven days, nor invest in any repurchase agreements with maturities of over 30 days or enter into repurchase agreements with The Northwestern Mutual Life Insurance Company (“Northwestern Mutual”).

MORE ABOUT THE PORTFOLIOS’ OBJECTIVES AND STRATEGIES

Adjustable Rate Securities (including Variable, Floating and Inverse Floating Rate) and Master Demand Notes

Generally, the maturity of a security is the period remaining until the date (noted on the instrument) on which the principal amount of the instrument must be paid; in the case of a security scheduled to be redeemed, this is the date on which the redemption payment must be made. In some cases, securities are issued that either provide for payment upon “demand” or that provide for a periodic adjustment of the interest rate by a predetermined formula or based on an index such that fluctuation in the principal value of the security is minimized. As a technical matter, such securities may have long-term maturities, but typically are treated as a short-term investment if certain conditions are satisfied. These securities, which may take a variety of forms including variable rate, floating rate and put option securities, have less potential for capital appreciation (or depreciation) than fixed rate securities. Each of the Portfolios may invest in variable rate securities.

Variable and floating rate securities provide for a periodic adjustment in the interest rate paid on the obligations. The terms of such obligations provide that interest rates are adjusted periodically based upon an interest rate adjustment index as provided in the respective obligations. The adjustment intervals may be regular, and range from daily up to annually, or may be event based, such as based on a change in the prime rate. Each Portfolio may invest in floating rate debt instruments (“floaters”) and engage in credit spread trades, if consistent with their respective investment objectives and strategies. The interest rate on a floater is a variable rate which is tied to another interest rate, such as a money-market index or Treasury bill rate. The interest rate on a floater resets periodically. While, because of the interest rate reset feature, floaters provide a Portfolio with a certain degree of protection against rises in interest rates, the Portfolio will participate in any declines in interest rates as well. A credit spread trade is an investment position relating to a difference in the prices or interest rates of two securities or currencies, where the value of the investment position is determined by movements in the difference between the prices or interest rates, as the case may be, of the respective securities or currencies. The Portfolios may also invest in inverse floating rate debt instruments (“inverse floaters”). The interest rate on an inverse floater resets in the opposite direction from the market rate of interest to which the inverse floater is indexed. An inverse floating rate security may exhibit greater price volatility than a fixed rate obligation of similar credit quality.

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An inverse floater is a type of derivative security that bears an interest rate that moves inversely to market interest rates. As market interest rates rise, the interest rate on inverse floaters goes down, and vice versa. Generally, this is accomplished by expressing the interest rate on the inverse floater as an above-market fixed rate of interest, reduced by an amount determined by reference to a market-based or bond-specific floating interest rate (as well as by any fees associated with administering the inverse floater program).

Inverse floaters may be issued in conjunction with an equal amount of Dutch Auction floating rate bonds (floaters), or a market-based index may be used to set the interest rate on these securities. A Dutch Auction is an auction system in which the price of the security is gradually lowered until it meets a responsive bid and is sold. Floaters and inverse floaters may be brought to market by (1) a broker-dealer who purchase fixed rate bonds and places them in a trust, or (2) an issuer seeking to reduce interest expenses by using a floater/inverse floater structure in lieu of fixed rate bonds.

In the case of a broker-dealer structured offering (where underlying fixed rate bonds have been placed in a trust), distributions from the underlying bonds are allocated to floater and inverse floater holders in the following manner:

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Floater holders receive interest based on rates set at a six-month interval or at a Dutch Auction, which is typically held every 28 to 35 days. Current and prospective floater holders bid the minimum interest rate that they are willing to accept on the floaters, and the interest rate is set just high enough to ensure that all of the floaters are sold.

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Inverse floater holders receive all of the interest that remains, if any, on the underlying bonds after floater interest and auction fees are paid. The interest rates on inverse floaters may be significantly reduced, even to zero, if interest rates rise.

Procedures for determining the interest payment on floaters and inverse floaters brought to market directly by the issuer are comparable, although the interest paid on the inverse floaters is based on a presumed coupon rate that would have been required to bring fixed rate bonds to market at the time the floaters and inverse floaters were issued.

Where inverse floaters are issued in conjunction with floaters, inverse floater holders may be given the right to acquire the underlying security (or to create a fixed rate bond) by calling an equal amount of corresponding floaters. The underlying security may then be held or sold. However, typically, there are time constraints and other limitations associated with any right to combine interests and claim the underlying security.

Floater holders subject to a Dutch Auction procedure generally do not have the right to put back their interests to the issuer or to a third party. If a Dutch Auction fails, the floater holder may be required to hold its position until the underlying bond matures, during which time interest on the floater is capped at a predetermined rate.

The second market for floaters and inverse floaters may be limited. The market value of inverse floaters tends to be significantly more volatile than fixed rate bonds.

Variable rate demand notes (“VRDNs”) are obligations issued by corporate or governmental entities which contain a floating or variable interest rate adjustment formula and an unconditional right of demand to receive payment of the unpaid principal balance plus accrued interest upon a short notice period not to exceed seven days. The interest rates are adjustable at intervals ranging from daily to up to every six months to some prevailing market rate for similar investments, such adjustment formula being calculated to maintain the market value of the VRDN at approximately the par value of the VRDN upon the adjustment date. The adjustments are typically based upon the prime rate of a bank or some other appropriate interest rate adjustment index.

Master demand notes are notes which provide for a periodic adjustment in the interest rate paid (usually tied to the Treasury Bill auction rate) and permit daily changes in the principal amount borrowed. While there may be no active secondary market with respect to a particular VRDN purchased by a Portfolio, the Portfolio may, upon the notice specified in the note, demand payment of the principal of and accrued interest on the note at any time and may resell the note at any time to a third party. The absence of such an active secondary market, however, could make it difficult for a Portfolio to dispose of the VRDN involved in the event the issuer of the note defaulted on its payment obligations, and the Portfolio could, for this or other reasons, suffer a loss to the extent of the default.

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Auction Rate Securities

Each Portfolio, other than the Government Money Market Portfolio, may invest in auction rate securities in accordance with its investment objectives and strategies and in accordance with the 1940 Act. An auction rate security is one in which the interest rate or dividend rate, depending on the type of security being auctioned, is initially determined, and subsequently reset, through a Dutch Auction process.

Typically, in a Dutch Auction, a broker-dealer submits bids on behalf of current and prospective investors to the auction agent. Each bid represents the number of shares or par that an investor is looking to purchase, along with the lowest interest rate or dividend rate they are willing to accept in return. The lowest bid rate at which all the shares can be sold at par establishes the auction rate, otherwise known as the “clearing rate”. This rate is paid on the entire issue for the upcoming period. Investors who bid a minimum rate above the clearing rate receive no securities, while those whose minimum bid rates were at or below the clearing rate receive the clearing rate for the next period. This type of auction market, generally, allows issuers access to low-cost financing while providing buyers of auction rate securities with the potential to earn higher yields on their short-term investments.

Auctions are held on a regular basis, typically weekly, monthly, quarterly, or some version thereof, and will only take place if there are enough orders to purchase all securities being sold at the auction. Depending on the type of market or security at auction, the holder of an auction rate security generally has the ability to submit any one of the following orders:

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Hold - Hold an existing position regardless of the new clearing rate (these securities are not included in auction).

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Hold at Rate/Roll - Bid to hold an existing position at a specified minimum rate. If the clearing rate is below the bid to hold rate, the securities are sold.

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Sell - Sell an existing position regardless of the clearing rate set at the auction.

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Buy - Submit a bid to buy a new position at a specified minimum clearing rate (new buyers or existing holders adding to their position at a specified interest rate).

In the event there are not enough buyers for a specific auction, the auction agent will determine that the auction has “failed.” In a failed auction the clearing rate for all securities automatically resets to the maximum rate defined in the offering documents of the issuer (primarily to compensate those who could not sell their positions because of the failed auction), until the next successful auction. Although they are not required to do so, broker-dealers may enter purchase bids on their own behalf to assist in preventing a failed auction.

There also may be an auction where all existing holders of auction rate securities submit hold orders as described above. In such a scenario, the auction agent will determine that an “All Hold” auction has taken place, and the clearing rate for all securities automatically resets to the All Hold Rate as defined in the offering documents of the issuer, until the next auction. This rate tends to be less than the current market rate an investor could receive had they invested in a similar security outside of the auction rate market.

The primary risk of investing in the auction rate securities market is liquidity risk. In the event of a failed auction, a Portfolio may not be able to sell a position when desired, and may need to continue to hold the position due to the lack of an efficient secondary market until the next successful auction or the legal maturity. A secondary risk of investing in auction rate securities, similar to investing in other types of fixed income securities, is the credit risk of the issuer. Since February 2008, many municipal issuers and closed-end funds have experienced, and continue to experience, failed auctions of their auction rate securities. Repeated auction failures have significantly affected the liquidity of auction rate securities, shareholders of such securities have generally continued to receive dividends at the above-mentioned maximum rate. There is no assurance that auctions will resume or that any market will develop for auction rate securities.

Banking Obligations

The Portfolios may invest in obligations of domestic and foreign banks. The assets of a bank or savings institution will be deemed to include the assets of its domestic and foreign branches. Obligations of foreign banks may also include Eurodollar Certificates of Deposit (“ECDs”), which are U.S. dollar-denominated certificates of deposit

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issued by offices of foreign and domestic banks located outside the United States; Eurodollar Time Deposits (“ETDs”), which are U.S. dollar-denominated deposits in a foreign branch of a U.S. bank or a foreign bank; Canadian Time Deposits (“CTDs”), which are essentially the same as ETDs except they are issued by Canadian offices of major Canadian banks; and Yankee Certificates of Deposit (“Yankee CDs”), which are U.S. dollar-denominated certificates of deposit issued by a U.S. branch of a foreign bank and held in the United States.

Eurodollar Certificates of Deposit. Each of the Portfolios may purchase Eurodollar certificates of deposit issued by foreign branches of U.S. banks and foreign banks, but consideration will be given to their marketability and possible restrictions on the flow of international currency transactions. Investment in such securities involves considerations which are not ordinarily associated with investing in domestic instruments, including currency exchange control regulations, the possibility of expropriation, seizure, or nationalization of foreign deposits, less liquidity and increased volatility in foreign securities markets, and the impact of political, social or diplomatic developments or the adoption of other foreign government restrictions that might adversely affect the payment of principal and interest. If the Portfolio were to invoke legal processes, it might encounter greater difficulties abroad than in the United States.

Brady Bonds

The Portfolios may invest in so-called “Brady Bonds.” Brady Bonds are issued as part of a debt restructuring in which the bonds are issued in exchange for cash and certain of the country’s outstanding commercial bank loans. Brady Bonds may be collateralized or uncollateralized, are issued in various currencies (primarily the U.S. dollar) and are actively traded in the OTC secondary market for debt of Latin American issuers. In light of the history of commercial bank loan defaults by Latin American public and private entities, investments in Brady Bonds may be viewed as speculative and subject to, among other things, the risk of default. Dollar-denominated, collateralized Brady Bonds, which may be fixed rate par bonds or floating rate discount bonds, are collateralized in full as to principal by U.S. Treasury zero coupon bonds having the same maturity as the bonds. Interest payment on these Brady Bonds generally are collateralized by cash or securities in the amount that, in the case of fixed rate bonds, is equal to at least one year of rolling interest payments or, in the case of floating rate bonds, initially is equal to at least one year’s rolling interest payments based on the applicable interest rate at that time and is adjusted at regular intervals thereafter. Brady Bonds are often viewed as having three or four valuation components: the collateralized repayment of principal at final maturity; the collateralized interest payments; the uncollateralized interest payments; and any uncollateralized repayment of principal at maturity (these uncollateralized amounts constituting the “residual risk”).

Convertible Securities

Each of the Portfolios may invest convertible securities. A convertible security is a bond, debenture, note, preferred stock or other security that may be converted into or exchanged for a prescribed amount of common stock of the same or a different issuer within a particular time period at a specified price or formula. A convertible security entitles the holder to receive the interest paid or accrued on debt or the dividend paid on preferred stock until the convertible security matures or is redeemed, converted or exchanged. Before conversion or exchange, such securities ordinarily provide a stream of income with generally higher yields than common stocks of the same or similar issuers, but lower than the yield on non-convertible debt. Of course, there can be no assurance of current income because issuers of convertible securities may default on their obligations. In addition, there can be no assurance of capital appreciation because the value of the underlying common stock will fluctuate. Because of the conversion feature, the managers consider some convertible securities to be equity equivalents.

The price of a convertible security will normally fluctuate in some proportion to changes in the price of the underlying asset. A convertible security is subject to risks relating to the activities of the issuer and/or general market and economic conditions. The stream of income typically paid on a convertible security may tend to cushion the security against declines in the price of the underlying asset. However, the stream of income causes fluctuations based upon changes in interest rates and the credit quality of the issuer. In general, the value of a convertible security is a function of (1) its yield in comparison with yields of other securities of comparable maturity and quality that do not have a conversion privilege and (2) its worth, at market value, if converted or exchanged into the underlying common stock. The price of a convertible security often reflects such variations in the price of the underlying common stock in a way that a non-convertible security does not. At any given time, investment value generally depends upon such factors as the general level of interest rates, the yield of similar nonconvertible securities, the financial strength of the issuer and the seniority of the security in the issuer’s capital structure.

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A convertible security may be subject to redemption at the option of the issuer at a predetermined price. If a convertible security held by a Portfolio is called for redemption, the Portfolio would be required to permit the issuer to redeem the security and convert it to underlying common stock or to cash, or would sell the convertible security to a third party, which may have an adverse effect on the Portfolio. A convertible security may feature a put option that permits the holder of the convertible security to sell that security back to the issuer at a predetermined price. A Portfolio generally invests in convertible securities for their favorable price characteristics and total return potential. Convertible securities are subordinate in rank to any senior debt obligations of the issuer, and, therefore, an issuer’s convertible securities entail more risk than its debt obligations. Convertible securities generally offer lower interest or dividend yields than non-convertible debt securities of similar credit quality because of the potential for capital appreciation. In addition, convertible securities are often lower-rated securities.

Unlike a convertible security that is a single security, a synthetic convertible security is comprised of two distinct securities that together resemble convertible securities in certain respects. Synthetic convertible securities are created by combining non-convertible bonds or preferred stocks with warrants or stock call options. The options that will form elements of synthetic convertible securities will be listed on a securities exchange or NASDAQ. The two components of a synthetic convertible security, which will be issued with respect to the same entity generally are not offered as a unit, and may be purchased and sold by a Portfolio at different times. Synthetic convertible securities differ from convertible securities in certain respects. Each component of a synthetic convertible security has a separate market value and responds differently to market fluctuations. Investing in a synthetic convertible security involves the risk normally found in holding the securities comprising the synthetic convertible security.

Contingent Convertible Instruments. Contingent convertible securities (“CoCos”) are a form of hybrid debt security that may be either converted into equity or have their principal written down upon the occurrence of certain “triggers.” Such triggers are generally linked to the inability of the issuing institution to maintain applicable regulatory capital thresholds or to the discretionary action on the part of the issuer’s regulator based upon the regulator’s assessment of the issuer’s ongoing financial viability. CoCos’ unique equity conversion or principal write-down features are tailored to the issuing banking institution and its regulatory requirements. Some additional risks associated with CoCos include, but are not limited to:

Subordinated Instruments. CoCos will, in the majority of circumstances, be issued in the form of subordinated debt instruments in order to provide the appropriate regulatory capital treatment prior to a conversion. Accordingly, in the event of liquidation, dissolution or winding-up of an issuer prior to a conversion having occurred, the rights and claims of the holders of the CoCos, such as the Portfolios, against the issuer in respect of or arising under the terms of the CoCos shall generally rank junior to the claims of all holders of unsubordinated obligations of the issuer. In addition, if the CoCos are converted into the issuer’s underlying equity securities following a conversion event (i.e., a “trigger”), each holder will be subordinated due to their conversion from being the holder of a debt instrument to being the holder of an equity instrument.

Market Value Fluctuation. The value of CoCos is unpredictable and will be influenced by many factors including, without limitation: (i) the creditworthiness of the issuer and/or fluctuations in such issuer’s applicable capital ratios; (ii) supply and demand for the CoCos; (iii) general market conditions and available liquidity; and (iv) economic, financial and political events that affect the issuer, its particular market or the financial markets in general.

Delayed Funding Loans and Revolving Credit Facilities

The Portfolios may enter into, or acquire participations in, delayed funding loans and revolving credit facilities. Delayed funding loans and revolving credit facilities are borrowing arrangements in which the lender agrees to make loans up to a maximum amount upon demand by the borrower during a specified term. A revolving credit facility differs from a delayed funding loan in that as the borrower repays the loan, an amount equal to the repayment may be borrowed again during the term of the revolving credit facility. Delayed funding loans and revolving credit facilities usually

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provide for floating or variable rates of interest. These commitments may have the effect of requiring a Portfolio to increase its investment in a company at a time when it might not otherwise decide to do so (including at a time when the company’s financial condition makes it unlikely that such amounts will be repaid).

The Portfolios may invest in delayed funding loans and revolving credit facilities with credit quality comparable to that of issuers of other portfolio investments. Delayed funding loans and revolving credit facilities may be subject to restrictions on transfer, and only limited opportunities may exist to resell such instruments. As a result, a Portfolio may be unable to sell such investments at an opportune time or may have to resell them at less than fair market value. The Portfolios currently intend to treat delayed funding loans and revolving credit facilities for which there is no readily available market as illiquid for purposes of a Portfolio’s limitation on illiquid investments. Delayed funding loans and revolving credit facilities are considered to be debt obligations for purposes of a Portfolio’s investment restriction relating to the lending of funds or assets by the Portfolio.

Derivative Instruments

To the extent permitted by its investment objectives and policies, each Portfolio (except the Government Money Market Portfolio) may invest in derivative instruments. Generally, a derivative instrument is a financial arrangement, the value of which is based on, or derived from, a traditional security, asset or market index.

Overview

Uses of Derivatives. There are many different types of derivatives and many different ways to use them. Derivatives can be used for traditional hedging purposes to attempt to protect a Portfolio from exposure to changing interest rates, securities prices, inflation, currency exchange rates and other hedging purposes. Derivatives may also be used for non-hedging purposes, such as to enhance returns, manage or “equitize” cash, employ leverage, earn income, reduce transaction related costs, manage liquidity, and gain exposure to particular securities markets in a way that is more efficient than investing directly in those securities and other directional investments in particular assets. Fixed-income Portfolios may also use derivatives to adjust its portfolio’s duration and yield curve exposure. The return on a derivative may increase or decrease, depending upon changes in the reference asset or index to which it relates. Certain Portfolios may invest in derivatives as part of their principal investment strategies, which are identified in the Prospectus. Other Portfolios may use derivatives to a lesser extent.

General Risks. Derivative instruments are subject to a number of risks:

Management Risk. Like other investments, the ability of a Portfolio to successfully utilize derivatives depends in part upon the ability of the Adviser or Sub-Adviser to effectively assess and forecast market values and other price movements, interest rates, currency movements, and/or other economic factors, as well as the creditworthiness of credit derivatives and counterparties to derivatives transactions. The skills needed to successfully execute derivative strategies may be different from those needed for other types of transactions. Incorrect assessments or forecasts by the Adviser or Sub-Adviser could lead to substantial losses on derivatives positions held by the Portfolio, and the Portfolio might have been in a better position if it had not entered into the transaction at all.

Correlation Risk. The use of derivatives strategies involves the risk of an imperfect correlation, or even no correlation, between price movements of derivative instruments and the underlying asset, rate or index. For example, changes in the value of a hedging instrument may not match those of the investment being hedged. Adverse price movements in an instrument can result in a loss substantially greater than a Portfolio’s initial investment. There are a number of factors that may prevent a derivative instrument or strategy from achieving desired correlation, including the impact of fees, valuation determinations, liquidity environment, large or unexpected movements in the underlying asset, rate or index, or in the market generally, fluctuations in currency exchange rates, regulatory requirements, and the Portfolios’ investment restrictions and limitations.

Liquidity Risk. Derivatives are subject to the possibility that there may be no liquid secondary market, or the possibility that price fluctuation limits may be imposed by an applicable exchange, either of which may make it difficult or impossible to close out a position at an advantageous time or price. These risks may be magnified during periods of economic turmoil or in an extended economic downturn.

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Counterparty Risk. The use of derivatives also involves the risk that a loss may be sustained as a result of the insolvency or bankruptcy of the other party to the contract (i.e., a counterparty or clearinghouse) or the failure of a counterparty to make required payments or otherwise comply with the terms of the contract. The risk is partially mitigated if collateral or margin has been posted and is held against the position.

Credit Risk. Credit derivatives used by a Portfolio are at risk of loss to the extent that the Portfolio sells a credit default swap on a reference entity that is unable to make principal and interest payments when due or otherwise honor its obligations. The Adviser or Sub-Adviser, through its internal risk management processes, monitors credit risk and seeks to limit risk by restricting the exposure that each Portfolio has to any one credit, where feasible and appropriate.

Leverage Risk. Because many derivatives have a leverage component, adverse changes in the value or level of the underlying assets, reference rate, or index can result in a loss substantially greater than the amount implied by its notional value. Certain derivatives have the potential for unlimited loss, regardless of the size of the initial investment. When a Portfolio uses derivatives for leverage, investments in that Portfolio will tend to be more volatile, resulting in larger gains or losses in response to market changes.

Interest Rate Risk. The value of some derivative instruments in which the Portfolios invest may be particularly sensitive to changes in prevailing interest rates. The Portfolio may experience loss from such instruments if interest rates move in a direction unanticipated by the Adviser or Sub-Adviser.

Operational Risk. Operational risk generally refers to the risks related to potential operational issues, including documentation issues, settlement issues, systems failures, inadequate controls, and human error. Operational risks related to derivatives transactions are mitigated through a variety of processes, including trade confirmation review and segregation controls, risk management plans, third-party vendor procurement processes, and disaster recovery and business continuity procedures, among others.

Legal Risk. Legal risk refers to the risks related to insufficient documentation, insufficient capacity or authority of a counterparty to enter into a derivatives transactions, or legality or enforceability of a derivatives transaction contract. Legal risks related to derivatives transactions are mitigated through a variety of processes, including the review and negotiation of derivatives-related documentation related to derivatives transactions, as well as the ongoing monitoring of regulatory releasees, guidance and other publications to ensure sufficient liquidity and compliance with applicable securities laws, among other processes.

Commodity Risk. A Portfolio’s investments in commodity-linked derivative instruments and commodities may subject the Portfolio to greater volatility than investments in traditional securities. The value of commodity-linked derivative instruments or commodities may be affected by changes in overall market movements, foreign currency exchange rates, commodity index volatility, changes in inflation, interest rates, or supply and demand factors affecting a particular industry or commodity market, such as climate changes, weather, livestock disease, pandemics and public health emergencies, embargoes, taxation, war, terrorism, cyber-hacking, economic and political developments, environmental proceedings, tariffs, changes in storage costs, availability of transportation systems, and international economic, political and regulatory developments. The value of commodities and commodity-linked derivative instruments may also experience significant price volatility as a result of being the target of market fraud and price manipulation.

Other Risks. Participation in the markets for derivative instruments may also involve transaction costs to which a Portfolio may not be subject absent the use of these strategies. A Portfolio’s ability to use derivatives may also be limited by certain legal, regulatory and tax considerations. Derivatives are also subject to the risk of mispricing or improper valuation. Valuation for derivatives may not be readily available in the market. Valuation may be more difficult in times of market turmoil since many investors and market makers may be reluctant to purchase complex instruments or quote prices for them. In evaluating the risks and contractual obligations associated with particular derivative instruments, it is important to consider that certain derivative transactions may be modified or terminated only by mutual consent of the Portfolio and its counterparty and certain derivative transactions may be terminated by the counterparty or the Portfolio, as the case may be, upon the occurrence of certain Portfolio-related or counterparty-related events, which may result in losses or gains to the Portfolio based on the market value of the derivative transactions entered into between the Portfolio and the counterparty. It may not be possible for a Portfolio to modify, terminate, or offset the Portfolio’s obligations or the Portfolio’s exposure to the risks associated with a derivative transaction prior to its termination or maturity date, which may create a possibility of increased volatility and/or

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decreased liquidity to the Portfolio. Upon the expiration or termination of a particular contract, a Portfolio may wish to retain a Portfolio’s position in the derivative instrument by entering into a similar contract, but may be unable to do so if the counterparty to the original contract is unwilling to enter into the new contract and no other appropriate counterparty can be found, which could cause the Portfolio not to be able to maintain certain desired investment exposures or not to be able to hedge other investment positions or risks, which could cause losses to the Portfolio. Furthermore, after such an expiration or termination of a particular contract, a Portfolio may have fewer counterparties with which to engage in additional derivative transactions, which could lead to potentially greater counterparty risk exposure to one or more counterparties and which could increase the cost of entering into certain derivatives. While some strategies involving derivative instruments can reduce the risk of loss, they can also reduce the opportunity for gain or even result in losses by offsetting favorable price movements in other Portfolio investments. For Portfolios that gain exposure to an asset class using derivative instruments backed by a collateral portfolio of fixed-income securities, changes in the value of the fixed-income securities may result in greater or lesser exposure to that asset class than would have resulted from a direct investment in securities comprising that asset class.

Furthermore, the SEC has adopted new regulations related to the use of derivatives and related instruments by registered investment companies. These regulations may make derivatives more costly, may limit the availability or reduce the liquidity of derivatives, or may otherwise adversely affect the value or performance of derivatives. Any such adverse future developments could impair the effectiveness of a Portfolio’s derivative transactions and cause such Portfolio to lose value.

More Information About Types of Derivative Instruments, Strategies, and Related Risks

The Portfolios may purchase and sell (write) both put options and call options on securities, swap agreements, securities indices, and foreign currencies, and enter into interest rate, foreign currency, index and futures contracts and purchase and sell options on such futures contracts (“futures options”) and forward contracts, including forward foreign currency exchange contracts for hedging purposes, or as part of their overall investment strategies, except that those Portfolios that may not invest in foreign currency-denominated securities may not enter into transactions involving currency futures, forwards, swaps or options. The Portfolios (and in particular the Index 500 Stock, Index 400 Stock and Index 600 Stock Portfolios) may invest in futures and swap agreements to seek to replicate the composition and performance of their target index. The Portfolios (except for the Government Money Market and Long-Term U.S. Government Portfolios) also may purchase and sell foreign currency options, futures, and forwards for purposes of increasing exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one country to another. A Portfolio also may enter into swap agreements with respect to interest rates, and indices of securities. The Portfolios (and in particular, the Inflation Managed Portfolio) may enter into swap agreements to manage and reduce the effects of inflation. In addition, the Fixed-Income Portfolios may invest in swap agreements and other derivative instruments to adjust their portfolio’s duration and yield curve exposure.

The Portfolios may take advantage of opportunities in the area of options and futures contracts and options on futures contracts and any other derivative product which is not presently contemplated for use by the Portfolios or which are not currently available, but which may be developed, to the extent such opportunities are both consistent with the Portfolios’ respective investment objectives and legally permissible for the Portfolios. Before making such investments, the Portfolio would supplement the disclosure in its Prospectus or SAI, if the Portfolio determined it to be appropriate.

The Portfolios might not employ any of the strategies described herein, and no assurance can be given that any strategy used will succeed. Suitable derivative transactions may not be available in all circumstances. More information about the types of derivatives the Portfolios may use and the related risks is discussed in greater detail below.

Options on Securities and Indices.

A Portfolio may, to the extent specified herein or in the Prospectus, purchase and sell both put and call options on fixed-income or other securities or indices in standardized contracts traded on foreign or domestic securities exchanges, boards of trade, or similar entities, or quoted on NASDAQ or on an OTC market, and agreements, sometimes called cash puts, which may accompany the purchase of a new issue of bonds from a dealer.

An option on a security (or index) is a contract that gives the holder of the option, in return for a premium, the right to buy from (in the case of a call) or sell to (in the case of a put) the writer of the option the security underlying the option (or the cash value of the index) at a specified exercise price often at any time during the term of the option for

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American options or only at expiration for European options. The writer of an option on a security has the obligation upon exercise of the option to deliver the underlying security upon payment of the exercise price or to pay the exercise price upon delivery of the underlying security. Some put options written by a Portfolio may be primarily for the purpose of providing liquidity to the counterparty and may be structured to have an exercise price that is less than the market value of the underlying securities that would be received by the Portfolio. Upon exercise, the writer of an option on an index is obligated to pay the difference between the cash value of the index and the exercise price multiplied by the specified multiplier for the index option. (An index is designed to reflect features of a particular financial or securities market, a specific group of financial instruments or securities, or certain economic indicators.)

If an option written by a Portfolio expires unexercised, the Portfolio realizes a capital gain equal to the premium received at the time the option was written. If an option purchased by a Portfolio expires unexercised, the Portfolio realizes a capital loss equal to the premium paid. Prior to the earlier of exercise or expiration, an option may be closed out by an offsetting purchase or sale of an option of the same series (type, exchange, underlying security or index, exercise price, and expiration). There can be no assurance, however, that a closing purchase or sale transaction can be effected when the Adviser or Sub-Adviser desires.

A Portfolio may sell put or call options it has previously purchased, which could result in a net gain or loss depending on whether the amount realized on the sale is more or less than the premium and other transaction costs paid on the put or call option which is sold. Prior to exercise or expiration, an option may be closed out by an offsetting purchase or sale of an option of the same series. The principal factors affecting the market value of a put or a call option include supply and demand, interest rates, the current market price of the underlying security or index in relation to the exercise price of the option, the volatility of the underlying security or index, and the time remaining until the expiration date.

The Portfolios may use a combination of call and put options in pursuing their strategies.

Additional Risks Associated with Options on Securities and Indices. There are several risks associated with transactions in options on securities and on indices. For example, there are significant differences between the securities and options markets that could result in an imperfect correlation between these markets, causing a given transaction not to achieve its objectives. A decision as to whether, when and how to use options involves the exercise of skill and judgment, and even a well-conceived transaction may be unsuccessful to some degree because of market behavior or unexpected events.

The writer of an American-style option often has no control over the time when it may be required to fulfill its obligation as a writer of the option. Once an option writer has received an exercise notice, it cannot effect a closing purchase transaction in order to terminate its obligation under the option and must deliver the underlying security at the exercise price. To the extent a Portfolio writes a put option, the Portfolio has assumed the obligation during the option period to purchase the underlying investment from the put buyer at the option’s exercise price if the put buyer exercises its option, regardless of whether the value of the underlying investment falls below the exercise price. This means that a Portfolio that writes a put option may be required to take delivery of the underlying investment and make payment for such investment at the exercise price. This may result in losses to the Portfolio and may result in the Portfolio holding the underlying investment for some period of time when it is disadvantageous to do so.

If a put or call option purchased by the Portfolio is not sold when it has remaining value, and if the market price of the underlying security remains equal to or greater than the exercise price (in the case of a put), or remains less than or equal to the exercise price (in the case of a call), the Portfolio will lose its entire investment in the option. Also, where a put or call option on a particular security is purchased to hedge against price movements in a related security, the price of the put or call option may move more or less than the price of the related security.

There can be no assurance that a liquid market will exist when a Portfolio seeks to close out an option position. If a Portfolio is unable to close out an option that it had purchased on a security, it will have to exercise the option in order to realize any profit or the option may expire worthless.

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If trading were suspended in an option purchased by a Portfolio, the Portfolio would not be able to close out the option. If restrictions on exercise were imposed, the Portfolio might be unable to exercise an option it has purchased. Except to the extent that a call option on an index written by the Portfolio is covered by an option on the same index purchased by the Portfolio, movements in the index may result in a loss to the Portfolio; however, such losses may be mitigated by changes in the value of the Portfolio’s securities during the period the option was outstanding.

To the extent that a Portfolio writes a call option on a security it holds in its portfolio and intends to use such security as the sole means of “covering” its obligation under the call option, the Portfolio has, in return for the premium on the option, given up the opportunity to profit from a price increase in the underlying security above the exercise price during the option period, but, as long as its obligation under such call option continues, has retained the risk of loss should the price of the underlying security decline. If a Portfolio is unable to close out such a call option, the Portfolio will not be able to sell the underlying security unless the option expired without exercise.

Foreign Currency Options.

Portfolios that invest in foreign currency-denominated securities may buy or sell put and call options on foreign currencies. These Portfolios may buy or sell put and call options on foreign currencies either on exchanges or in the OTC market. A put option on a foreign currency gives the purchaser of the option the right to sell a foreign currency at the exercise price until the option expires. A call option on a foreign currency gives the purchaser of the option the right to purchase the currency at the exercise price until the option expires. Currency options traded on U.S. or other exchanges may be subject to position limits which may limit the ability of a Portfolio to reduce foreign currency risk using such options. OTC options differ from traded options in that they are two-party contracts with price and other terms negotiated between buyer and seller, and generally do not have as much market liquidity as exchange-traded options.

Futures Contracts and Options on Futures Contracts.

A futures contract is an agreement to buy or sell a financial instrument, foreign currency or the cash value of an index at a set price on a future date. These contracts are traded on exchanges, so that, in most cases, a party can close out its position on the exchange for cash, without delivering the underlying asset. An option on a futures contract gives the holder of the option the right to buy (or sell) a position in a futures contract to the writer of the option, at a specified price and on or before a specified expiration date.

Each Portfolio (except for the Government Money Market Portfolio) may invest in futures contracts and options thereon (“futures options”) with respect to, but not limited to, interest rates, and security or indices. To the extent that a Portfolio may invest in foreign currency-denominated securities, it also may invest in foreign currency futures contracts and options thereon.

A futures contract on an index is an agreement pursuant to which a party agrees to pay or receive an amount of cash equal to the difference between the value of the index at the close of the last trading day of the contract and the price at which the index contract was originally written. Although the value of an index might be a function of the value of certain specified securities, no physical delivery of these securities is made. A public market exists in futures contracts covering a number of indices as well as financial instruments and foreign currencies, including, but not limited to: the S&P 500; the S&P Midcap 400; the Nikkei 225; the Markit CDX credit index; the iTraxx credit index; U.S. Treasury bonds; U.S. Treasury notes; U.S. Treasury bills; 90-day commercial paper; bank certificates of deposit; Eurodollar certificates of deposit; the Australian dollar; the Canadian dollar; the British pound; the Japanese yen; the Swiss franc; the Mexican peso; and certain multinational currencies, such as the euro. It is expected that other futures contracts will be developed and traded in the future. Certain futures contracts on indices, financial instruments or foreign currencies may represent new investment products that lack track records.

A Portfolio may purchase and write call and put options on futures contracts. Futures options possess many of the same characteristics as options on securities and indices (discussed above). A futures option gives the holder the right, in return for the premium paid, to assume a long position (call) or short position (put) in a futures contract at a specified exercise price at any time during the period of the option. Upon exercise of a call option, the holder acquires a long position in the futures contract and the writer is assigned the opposite short position. In the case of a put option, the

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opposite is true. A call option is “in the money” if the value of the futures contract that is the subject of the option exceeds the exercise price. A put option is “in the money” if the exercise price exceeds the value of the futures contract that is the subject of the option.

Limitations on Use of Futures and Futures Options. When a purchase or sale of a futures contract is made by a Portfolio, the Portfolio is required to deposit with its custodian (or futures commission merchant, if legally permitted) a specified amount of margin (“initial margin”). The margin required for a futures contract is set by the clearinghouse through which the contract is cleared and may be modified during the term of the contract. Margin requirements on foreign clearinghouses may be different than U.S. clearinghouses. The initial margin is in the nature of a performance bond or good faith deposit on the futures contract which is returned to the Portfolio upon termination of the contract, assuming all contractual obligations have been satisfied. Each Portfolio expects to earn interest income on its initial margin deposits. Each day a Portfolio pays or receives cash, called “variation margin,” equal to the daily change in value of the futures contract. This process is known as “marking-to-market.”

A Portfolio is also required to deposit and maintain margin with respect to put and call options on futures contracts written by it. Such margin deposits will vary depending on the nature of the underlying futures contract (and the related initial margin requirements), the current market value of the option, and other futures positions held by the Portfolio.

Although some futures contracts call for making or taking delivery of the underlying securities, generally these obligations are closed out prior to delivery by offsetting purchases or sales of matching futures contracts (same exchange, underlying security or index, and delivery month). Closing out a futures contract sale is effected by purchasing a futures contract for the same aggregate amount of the specific type of financial instrument or commodity with the same delivery date. The transaction costs must also be included in these calculations.

Additional Risks Associated with Futures and Futures Options. There are several risks associated with the use of futures contracts and futures options as hedging techniques. A purchase or sale of a futures contract may result in losses in excess of the amount invested in the futures contract. There can be no guarantee that there will be a correlation between price movements in the hedging vehicle and in the Portfolio securities being hedged. In addition, there are significant differences between the securities and futures markets that could result in an imperfect correlation between the markets, causing a given hedge not to achieve its objectives. The degree of imperfection of correlation depends on circumstances such as variations in speculative market demand for futures and futures options, including technical influences in futures trading and futures options, and differences between the financial instruments being hedged and the instruments underlying the standard contracts available for trading in such respects as interest rate levels, maturities and creditworthiness of issuers. A decision as to whether, when and how to hedge involves the exercise of skill and judgment, and even a well-conceived hedge may be unsuccessful to some degree because of market behavior or unexpected interest rate trends.

Futures contracts on U.S. government securities historically have reacted to an increase or decrease in interest rates in a manner similar to that in which the underlying U.S. government securities reacted. To the extent, however, that a Portfolio enters into such futures contracts, the value of such futures will not vary in direct proportion to the value of such Portfolio’s holdings of U.S. government securities. Thus, the anticipated spread between the price of the futures contract and the hedged security may be distorted due to differences in the nature of the markets. The spread also may be distorted by differences in initial and variation margin requirements, the liquidity of such markets and the participation of speculators in such markets.

Futures exchanges may limit the amount of fluctuation permitted in certain futures contract prices during a single trading day. The daily limit establishes the maximum amount that the price of a futures contract may vary either up or down from the previous day’s settlement price at the end of the current trading session. Once the daily limit has been reached in a futures contract subject to the limit, no more trades may be made on that day at a price beyond that limit. The daily limit governs only price movements during a particular trading day and therefore does not limit potential losses because the limit may work to prevent the liquidation of unfavorable positions. For example, futures prices have occasionally moved to the daily limit for several consecutive trading days with little or no trading, thereby preventing prompt liquidation of positions and subjecting some holders of futures contracts to substantial losses.

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There can be no assurance that a liquid market will exist at a time when a Portfolio seeks to close out a futures or a futures option position, and that Portfolio would remain obligated to meet margin requirements until the position is closed. In addition, many of the contracts discussed above are relatively new instruments without a significant trading history. As a result, there can be no assurance that an active secondary market will develop or continue to exist.

Forward Contracts.

A forward contract is an agreement between two parties in which one party is obligated to deliver a stated amount of a stated asset at a specified time in the future and the other party is obligated to pay a specified amount for the assets at the time of delivery. Forward contracts generally are traded in an interbank market conducted directly between traders (usually large commercial banks) and their customers. Unlike futures contracts, which are standardized contracts, forward contracts can be specifically drawn to meet the needs of the parties that enter into them. The parties to a forward contract may agree to offset or terminate the contract before its maturity, or may hold the contract to maturity and complete the contemplated exchange. A Portfolio may enter into a forward contract for any legal purpose consistent with its investment objective.

The most typically used type of forward contract is forward foreign currency exchange contracts. A forward currency contract is an obligation to buy or sell an amount of a specified currency for an agreed price (which may be in U.S. dollars or a foreign currency). A Portfolio will exchange foreign currencies for U.S. dollars and for other foreign currencies in the normal course of business and may buy and sell currencies through forward currency contracts in order to fix a price for securities it has agreed to buy or sell (“transaction hedge”). A Portfolio also may hedge some or all of its investments denominated in a foreign currency or exposed to foreign currency fluctuations against a decline in the value of that currency relative to the U.S. dollar by entering into forward currency contracts to sell an amount of that currency (or a proxy currency whose performance is expected to replicate or exceed the performance of that currency relative to the U.S. dollar) approximating the value of some or all of its portfolio securities denominated in that currency (“position hedge”) or by participating in options or futures contracts with respect to the currency. A Portfolio also may enter into a forward currency contract with respect to a currency where the Portfolio is considering the purchase or sale of investments denominated in that currency but has not yet selected the specific investments (“anticipatory hedge”). In any of these circumstances a Portfolio may, alternatively, enter into a forward currency contract to purchase or sell one foreign currency for a second currency that is expected to perform more favorably relative to the U.S. dollar if the portfolio manager believes there is a reasonable degree of correlation between movements in the two currencies (“cross-hedge”).

Additional Risks of Forward Currency Exchange Contracts. These types of hedging minimize the effect of currency appreciation as well as depreciation, but do not eliminate fluctuations in the underlying U.S. dollar equivalent value of the proceeds of or rates of return on a Portfolio’s foreign currency denominated portfolio securities. The matching of the increase in value of a forward contract and the decline in the U.S. dollar equivalent value of the foreign currency denominated asset that is the subject of the hedge generally will not be precise. Shifting a Portfolio’s currency exposure from one foreign currency to another removes that Portfolio’s opportunity to profit from increases in the value of the original currency and involves a risk of increased losses to such Portfolio if its portfolio manager’s projection of future exchange rates is inaccurate. Proxy hedges and cross-hedges may result in losses if the currency used to hedge does not perform similarly to the currency in which hedged securities are denominated. Unforeseen changes in currency prices may result in poorer overall performance for a Portfolio than if it had not entered into such contracts.

Additional Risks of Options on Securities, Futures Contracts, Options on Futures Contracts, and Forward Currency Exchange Contracts and Options Thereon. Options on securities, futures contracts, options on futures contracts, forward currency exchange contracts and options on forward currency exchange contracts may be traded on foreign exchanges. Such transactions may not be regulated as effectively as similar transactions in the United States; may not involve a clearing mechanism and related guarantees, and are subject to the risk of governmental actions affecting trading in, or the prices of, foreign securities. The value of such positions also could be adversely affected by: (i) other complex foreign political, legal and economic factors, (ii) lesser availability than in the United States of data on which to make trading decisions, (iii) delays in a Portfolio’s ability to act upon economic events occurring in foreign markets during non-business hours in the United States, (iv) the imposition of different exercise and settlement terms and procedures and margin requirements than in the United States, and (v) lesser trading volume.

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When-Issued, Delayed Delivery and Forward Commitment Transactions.

Each of the Portfolios may purchase or sell securities on a when-issued, delayed delivery, or forward commitment basis. These transactions may be known as to-be-announced (“TBA”) transactions.

When purchasing a security on a when-issued, delayed delivery, or forward commitment basis, the Portfolio assumes the rights and risks of ownership of the security, including the risk of price and yield fluctuations, and takes such fluctuations into account when determining its net asset value. Because the Portfolio is not required to pay for the security until the delivery date, these risks are in addition to the risks associated with the Portfolios’ other investments. If the other party to a transaction fails to deliver the securities, the Portfolio could miss a favorable price or yield opportunity. If the Portfolio remains substantially fully invested at a time when when-issued, delayed delivery, or forward commitment purchases are outstanding, the purchases may result in a form of leverage.

When a Portfolio has sold a security on a when-issued, delayed delivery, or forward commitment basis, the Portfolio does not participate in future gains or losses with respect to the security. If the other party to a transaction fails to pay for the securities, the Portfolio could suffer a loss. Additionally, when selling a security on a when-issued, delayed delivery, or forward commitment basis without owning the security, a Portfolio will incur a loss if the security’s price appreciates in value such that the security’s price is above the agreed upon price on the settlement date.

A Portfolio may dispose of or renegotiate a transaction after it is entered into, and may purchase or sell when-issued, delayed delivery or forward commitment securities before the settlement date, which may result in a gain or loss. There is no percentage limitation on the extent to which the Portfolios may purchase or sell securities on a when-issued, delayed delivery, or forward commitment basis. Such transactions also can be subject to the risks discussed under “Derivative Instruments” above.

Swap Agreements and Options on Swap Agreements.

Each Portfolio (except for the Government Money Market Portfolio) may engage in swap transactions, including, but not limited to, swap agreements on interest rates, security indices, specific securities, and credit- and event-linked swaps. Each Portfolio (and in particular the Inflation Managed Portfolio) may enter into swap agreements to manage or reduce the risk of the effects of inflation with respect to its positions in non-inflation indexed securities. A Portfolio also may enter into options on swap agreements (“swaptions”).

A Portfolio may enter into swap transactions for any legal purpose consistent with its investment objectives and policies, such as attempting to obtain or preserve a particular return or spread at a lower cost than obtaining a return or spread through purchases and/or sales of instruments in other markets, to protect against currency fluctuations, as a duration management technique, to protect against any increase in the price of securities a Portfolio anticipates purchasing at a later date, or to gain exposure to certain markets in a more cost efficient manner.

OTC swap agreements are bilateral contracts entered into primarily by institutional investors for periods ranging from a few weeks to more than one year. In a standard OTC swap transaction, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on particular predetermined investments or instruments. The gross returns to be exchanged or “swapped” between the parties are generally calculated with respect to a “notional amount,” i.e., the return on or change in value of a particular dollar amount invested at a particular interest rate, in a particular foreign currency, or in a “basket” of securities representing a particular index. A “quanto” or “differential” swap combines both an interest rate and a currency transaction. Certain swap agreements, such as interest rate swaps, are traded on exchanges and cleared through central clearinghouses. Other forms of swap agreements include interest rate caps, under which, in return for a premium, one party agrees to make payments to the other to the extent that interest rates exceed a specified rate, or “cap”; interest rate floors, under which, in return for a premium, one party agrees to make payments to the other to the extent that interest rates fall below a specified rate, or “floor”; and interest rate collars, under which a party sells a cap and purchases a floor or vice versa in an attempt to protect itself against interest rate movements exceeding given minimum or maximum levels.

A total return swap agreement is a contract in which one party agrees to make periodic payments to another party based on the change in market value of underlying assets, which may include a specific security, a basket of securities, or a securities index during the specified period, in return for periodic payments based on a fixed or variable interest rate or the total return from other underlying assets. Total return swap agreements may be used to obtain

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exposure to a security or market without owning or taking physical custody of such security or investing directly in such market. Total return swap agreements may effectively add leverage to the Portfolio because, in addition to its total net assets, the Portfolio would be subject to investment exposure on the notional amount of the swap.

Total return swap agreements are subject to the risk that a counterparty will default on its payment obligations to the Portfolio. Swap agreements also bear the risk that the Portfolio will not be able to meet its obligation to the counterparty.

A Portfolio also may enter into swaptions. A swaption is a contract that gives a counterparty the right (but not the obligation), in return for payment of a premium, to enter into a new swap agreement or to shorten, extend, cancel or otherwise modify an existing swap agreement, at some designated future time on specified terms. Each Portfolio (except for the Government Money Market Portfolio) may write (sell) and purchase put and call swaptions.

Depending on the terms of the particular option agreement, a Portfolio will generally incur a greater degree of risk when it writes a swaption than it will incur when it purchases a swaption. When a Portfolio purchases a swaption, it risks losing only the amount of the premium it has paid should it decide to let the option expire unexercised. However, when a Portfolio writes a swaption, upon exercise of the option the Portfolio will become obligated according to the terms of the underlying agreement.

A Portfolio also may enter into forward volatility agreements, also known as volatility swaps. In a volatility swap, the counterparties agree to make payments in connection with changes in the volatility (i.e., the magnitude of change over a specified period of time) of an underlying reference instrument, such as a currency, rate, index, security or other financial instrument. Volatility swaps permit the parties to attempt to hedge volatility risk and/or take positions on the projected future volatility of an underlying reference instrument. For example, a Portfolio may enter into a volatility swap in order to take the position that the reference instrument’s volatility will increase over a particular period of time. If the reference instrument’s volatility does increase over the specified time, the Portfolio will receive a payment from its counterparty based upon the amount by which the reference instrument’s realized volatility level exceeds a volatility level agreed upon by the parties. If the reference instrument’s volatility does not increase over the specified time, the Portfolio will make a payment to the counterparty based upon the amount by which the reference instrument’s realized volatility level falls below the volatility level agreed upon by the parties. Payments on a volatility swap will be greater if they are based upon the mathematical square of volatility (i.e., the measured volatility multiplied by itself, which is referred to as “variance”). This type of a volatility swap is frequently referred to as a variance swap. Certain of the Portfolios may engage in variance swaps.

A Portfolio also may enter into OTC and cleared credit default swap agreements. A credit default swap agreement may reference one or more debt securities or obligations that are not currently held by the Portfolio. The protection “buyer” in an OTC credit default contract is generally obligated to pay the protection “seller” an upfront or a periodic stream of payments over the term of the contract until a credit event, such as a default, on a reference obligation has occurred. If a credit event occurs, the seller generally must pay the buyer the “par value” (full notional value) of the swap in exchange for an equal face amount of deliverable obligations of the reference entity described in the swap, or the seller may be required to deliver the related net cash amount if the swap is cash settled. A Portfolio may be either the buyer or seller in the transaction. If the Portfolio is a buyer and no credit event occurs, the Portfolio may recover nothing if the swap is held through its termination date. However, if a credit event occurs, the buyer may receive the full notional value of the swap in exchange for an equal face amount of deliverable obligations of the reference entity whose value may have significantly decreased. As a seller, a Portfolio generally receives an upfront payment or a fixed rate of income throughout the term of the swap provided that there is no credit event. As the seller, a Portfolio would effectively add leverage to its portfolio because, in addition to its total net assets, a Portfolio would be subject to investment exposure on the notional amount of the swap.

The spread of a credit default swap is the annual amount the protection buyer must pay the protection seller over the length of the contract, expressed as a percentage of the notional amount. When spreads rise, market perceived credit risk rises and when spreads fall, market perceived credit risk falls. Wider credit spreads and decreasing market values, when compared to the notional amount of the swap, represent a deterioration of the credit soundness of the issuer of the reference obligation and a greater likelihood or risk of default or other credit event occurring as defined under the terms of the agreement. For credit default swap agreements on asset-backed securities and credit indices, the quoted market prices and resulting values, as well as the annual payment rate, serve as an indication of the current status of the payment/performance risk.

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Credit default swap agreements sold by a Portfolio may involve greater risks than if a Portfolio had invested in the reference obligation directly since, in addition to general market risks, credit default swaps are subject to illiquidity risk, counterparty risk (with respect to OTC credit default swaps) and credit risk. A Portfolio will enter into uncleared credit default swap agreements only with counterparties that meet certain standards of creditworthiness. A buyer generally also will lose its investment and recover nothing should no credit event occur and the swap is held to its termination date. If a credit event were to occur, the value of any deliverable obligation received by the seller, coupled with the upfront or periodic payments previously received, may be less than the full notional value it pays to the buyer, resulting in a loss of value to the seller.

The Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”) and related regulatory developments requires the clearing and exchange-trading of certain standardized OTC derivative instruments that the CFTC and SEC have defined as “swaps.” Separately, under the trade execution requirement, swap transactions subject to the clearing requirement must be traded on either a Designated Contract Market (“DCM”) or Swap Execution Facility (“SEF”) unless no DCM or SEF “makes the swap available to trade.” The Adviser and the Sub-Advisers will continue to monitor developments in this area, particularly to the extent regulatory changes affect the Portfolios ability to enter into swap agreements.

Whether a Portfolio’s use of swap agreements or swaptions will be successful in furthering its investment objective will depend on the Adviser’s or Sub-Adviser’s ability to predict correctly whether certain types of investments are likely to produce greater returns than other investments. Moreover, a Portfolio bears the risk of loss of the amount expected to be received under a swap agreement in the event of the default or bankruptcy of a swap agreement counterparty. The Portfolios will enter into OTC swap agreements only with counterparties that meet certain standards of creditworthiness. Certain restrictions imposed on the Portfolios by the Internal Revenue Code of 1986, as amended (the “Code”) may limit the Portfolios’ ability to use swap agreements. The swaps market is subject to increasing regulations. It is possible that developments in the swaps market, including additional government regulation, could adversely affect a Portfolio’s ability to terminate existing swap agreements or to realize amounts to be received under such agreements.

Swaps are highly specialized instruments that require investment techniques, risk analyses, and tax planning different from those associated with traditional investments. The use of a swap requires an understanding not only of the reference asset, reference rate, or index but also of the swap itself, without the benefit of observing the performance of the swap under all possible market conditions. To the extent that a swap is not liquid, it may not be possible to initiate a transaction or liquidate a position at an advantageous time or price, which may result in significant losses.

Like most other investments, swap agreements are subject to the risk that the market value of the instrument will change in a way detrimental to a Portfolio’s interest. A Portfolio bears the risk that the Adviser or Sub-Adviser will not accurately forecast future market trends or the values of assets, reference rates, indices, or other economic factors in establishing swap positions for the Portfolio. If the Adviser or Sub-Adviser attempts to use a swap as a hedge against, or as a substitute for, a portfolio investment, the Portfolio will be exposed to the risk that the swap will have or will develop imperfect or no correlation with the portfolio investment. This could cause substantial losses for the Portfolio. While hedging strategies involving swap instruments can reduce the risk of loss, they can also reduce the opportunity for gain or even result in losses by offsetting favorable price movements in other Portfolio investments. Many swaps are complex and often valued subjectively.

A Portfolio also may enter into recovery locks. A recovery lock is an agreement between two parties that provides for a fixed payment by one party and the delivery of a reference obligation, typically a bond, by the other party upon the occurrence of a credit event, such as a default, by the issuer of the reference obligation. Recovery locks are used to “lock in” a recovery amount on the reference obligation at the time the parties enter into the agreement. In contrast to a credit default swap where the final settlement amount may be dependent on the market price for the reference obligation upon the credit event, a recovery lock fixes the settlement amount in advance and is not dependent on the market price of the reference obligation at the time of the credit event. Unlike certain other types of derivatives, recovery locks generally do not involve upfront or periodic cash payments by either of the parties. Instead, payment and settlement occur after there has been a credit event. If a credit event does not occur prior to the termination date of a recovery lock, the agreement terminates and no payments are made by either party. A Portfolio may enter into a recovery lock to purchase or sell a reference obligation upon the occurrence of a credit event.

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Recovery locks are subject to the risk that the Adviser or Sub-Adviser will not accurately forecast the value of a reference obligation upon the occurrence of a credit event. For example, if a Portfolio enters into a recovery lock and agrees to deliver a reference obligation in exchange for a fixed payment upon the occurrence of a credit event, the value of the reference obligation or eventual recovery on the reference obligation following the credit event may be greater than the fixed payment made by the counterparty to the Portfolio. If this occurs, the Portfolio will incur a loss on the transaction. In addition to general market risks, recovery locks are subject to illiquidity risk, counterparty risk and credit risk. The market for recovery locks is relatively new and is smaller and less liquid than the market for credit default swaps and other derivatives. Elements of judgment may play a role in determining the value of a recovery lock. It may not be possible to enter into a recovery lock at an advantageous time or price. A Portfolio will only enter into recovery locks with counterparties that meet certain standards of creditworthiness.

Rule 18f-4 Program Concerning Derivatives Usage

Pursuant to Rule 18f-4 under the 1940 Act, the Series Fund, on behalf of the Portfolios, has adopted and implemented a derivatives risk management program, which includes policies and procedures that are reasonably designed to manage each Portfolio’s derivatives risk and reasonably segregates the functions associated with the program from the portfolio management of the Portfolios. Rule 18f-4 permits a fund to enter into derivatives transactions provided it adopts and implements a derivatives risk management program (including the appointment of a derivatives risk manager and the implementation of certain testing requirements), and complies with specific value-at-risk leverage limits for certain derivatives users and reporting requirements in respect of derivatives usage.

Separately, pursuant to Rule 38a-1 of the 1940 Act, the Series Fund has adopted Rule 18f-4 policies and procedures, which operate in conjunction with the Rule 18f-4 Program. The Series Fund Rule 18f-4 program and policies and procedures provide for the establishment, maintenance, and enforcement of investment, risk management, and related guidelines for each Portfolio’s derivatives risks.

As discussed in the “Investment Policies” section of this SAI, above, a Portfolio may enter into reverse repurchase agreements or similar financing transactions if: (i) the Portfolio complies with the asset coverage requirements of section 18 and combines the aggregate amount of indebtedness associated with all reverse repurchase agreements or similar financing transactions with the aggregate amount of any other senior securities representing indebtedness when calculating the asset coverage ratio; or (ii) the Portfolio treats all reverse repurchase agreements or similar financing transactions as derivatives transactions. Pursuant to its Rule 18f-4 derivatives risk management program, the Fund has elected to treat all reverse repurchase agreements and similar financing transactions as derivative transactions.

Regulatory Impact.

Additional government regulation of various types of derivative instruments, including futures, forwards, options and swap agreements, may limit or prevent a Portfolio from using such instruments as a part of its investment strategy, and could ultimately prevent a Portfolio from being able to achieve its investment objective. It is impossible to fully predict the effects of past, present or future legislation and regulation in this area, but the effects could be substantial and adverse. It is possible that legislative and regulatory activity could limit or restrict the ability of a Portfolio to use certain instruments as a part of its investment strategy. Limits or restrictions applicable to the counterparties with which the Portfolios engage in derivative transactions could also prevent the Portfolios from using certain instruments.

There is a possibility of future regulatory changes altering, perhaps to a material extent, the nature of an investment in the Portfolios or the ability of the Portfolios to continue to implement their investment strategies. The futures, options and swaps markets are subject to comprehensive statutes, regulations, and margin requirements. In addition, the SEC, CFTC and the clearinghouses are authorized to take extraordinary actions in the event of a market emergency, including, for example, the implementation or reduction of speculative position limits, the implementation of higher margin requirements, the establishment of daily price limits and the suspension of trading. The regulation of futures, options and swaps transactions in the U.S. is a rapidly changing area of law and is subject to modification by government and judicial action.

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In particular, the Dodd-Frank Act sets forth a legislative framework for OTC derivatives, including financial instruments, such as swaps, in which the Portfolios may invest. Title VII of the Dodd-Frank Act makes broad changes to the OTC derivatives market, grants significant new authority to the SEC and the CFTC to regulate OTC derivatives and market participants, and requires clearing and exchange trading of many OTC derivatives transactions.

The federal banking regulators, the SEC, and the CFTC have issued regulations requiring the posting of initial and variation margin for uncleared swaps. Some of these requirements apply to transactions in which the Portfolio is or will be a counterparty. Such requirements could increase the amount of margin required to be provided by the Portfolio in connection with its derivatives transactions or could require increased documentation and, therefore, make derivatives transactions more expensive. These rules have been phased in over time, and the market has yet to absorb their full impact. In addition, under special resolution regimes adopted in the United States, the European Union and various other jurisdictions, in the event of a counterparty’s (or its affiliate’s) insolvency, the Portfolios’ ability to exercise remedies, such as the termination of transactions, netting of obligations and realization on collateral, could be stayed or eliminated. Such regimes provide governmental authorities with broad authority to intervene when a financial institution is experiencing financial difficulty. In particular, with respect to counterparties who are subject to such proceedings in the European Union, the liabilities of such counterparties to the Portfolios could be reduced, eliminated, or converted to equity in such counterparties (sometimes referred to as a “bail in”).

In December 2023, the SEC adopted rule amendments providing that any covered clearing agency (“CCA”) for U.S. Treasury securities require its direct participants (which generally would be a bank or broker-dealer) to submit for clearance and settlement all eligible secondary market transactions in U.S. Treasury securities to which the direct participant is a counterparty. The clearing mandate includes in its scope all repurchase or reverse repurchase agreements of such direct participants collateralized by U.S. Treasury securities (collectively, “Treasury repo transactions”) of a type accepted for clearing by a registered CCA, including both bilateral Treasury repo transactions and triparty Treasury repo transactions where a bank agent provides custody, collateral management and settlement services. The Treasury repo transactions of registered funds with any direct participants of a CCA will be subject to the mandatory clearing requirement. Currently, the Fixed Income Clearing Corporation (“FICC”) is the only CCA for U.S. Treasury securities. Market participants, absent an exemption, will be required to clear Treasury repo transactions under the rule as of June 30, 2026. The clearing mandate is expected to result in a Portfolio being required to clear all or substantially all of its Treasury repo transactions as of the compliance date, and the Portfolio may incur costs in connection with entering into new agreements (or amending existing agreements) with direct participants of a CCA and potentially other market participants and taking other actions to comply with the new requirements. In addition, following the compliance the costs and benefits of entering into Treasury repo transactions to a Fund may be impacted as compared to Treasury repo transactions a Fund may enter into prior to the compliance date. The Adviser will monitor developments in the Treasury repo transactions market as the implementation period progresses.

Swap dealers, major market participants and swap counterparties are experiencing, and will continue to experience, new and additional regulations, requirements, compliance burdens and associated costs. The new law and the rules to be promulgated thereunder may negatively impact a Portfolio’s ability to meet its investment objective either through limits or requirements imposed on it or upon its counterparties. In particular, new position limits imposed on a Portfolio or its counterparties may impact that Portfolio’s ability to invest in futures, options and swaps in a manner that efficiently meets its investment objective. New requirements even if not directly applicable to the Portfolios, including capital requirements, changes to the CFTC speculative position limits regime and mandatory clearing, may increase the cost of a Portfolio’s investments and cost of doing business, which could adversely affect investors

Status Under the Commodity Exchange Act.

In February 2012, the CFTC adopted amendments to certain of its regulations under the CEA that provide an exclusion from registration as a “commodity pool operator” (“CPO”) for registered investment companies that use futures contracts and options thereon. The CFTC rules previously permitted unlimited futures transactions and options thereon, so long as the fund had claimed the applicable exemption or exclusion from registration as a CPO by making a notice filing with the National Futures Association (“NFA”); swap contracts were not previously regulated by the CFTC. The Portfolios described in and subject to this SAI have previously claimed and have historically relied upon the exclusion from CPO registration applicable to registered investment companies. Under the amended rules, the exclusion from CPO registration for registered investment companies is available only if the registered investment company uses futures contracts, options thereon, and certain swaps solely for “bona fide hedging” purposes (as defined by the CFTC),

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or limits its use of such instruments for non-bona fide hedging purposes to certain de minimis amounts. Also, in adopting the amendments, the CFTC clarified that the investment adviser to the registered investment company, rather than the company itself, is the entity subject to registration and regulation as a CPO if the applicable exemption or exclusion, as amended, is no longer available. Investment advisers required to register as a CPO under the amended rules will be required to operate the entity in compliance with certain disclosure, reporting and recordkeeping requirements. The CFTC has also issued a limited extension to certain qualifying fund operators from the obligation to register as a CPO until the later of June 30, 2013, or six months after the effective date (or compliance date, if later) of the CFTC’s issuance of revised guidance regarding the application of the CFTC de minimis thresholds to fund of funds positions. The Adviser has filed with the CFTC to avail itself of this exclusion from the CPO registration requirements with respect to the Portfolios and, therefore, neither the Portfolios nor the Adviser with respect to the Portfolios are subject to registration or regulation as a CPO as of the date of this SAI. The Fund and the Adviser intend to operate under the de minimis threshold and avoid CPO registration with respect to the Portfolios. Accordingly, until the guidance is finalized, it is unclear how the Fund’s fund of funds positions will be treated for purposes of the de minimis thresholds, but it is possible that the Portfolios will be restricted in their use of CFTC covered instruments. In the event that a Portfolio’s investments in commodity interests are not within the thresholds set forth in the exclusion, the Adviser may be required to register as a CPO and/or “commodity trading advisor” with the CFTC with respect to that Portfolio. In this case, such Portfolio’s expenses may increase, adversely affecting that Portfolio’s total return. Additionally, under CFTC rules, certain mandated disclosure, reporting and recordkeeping obligations will apply to the Adviser with respect to such Portfolio. To the extent any Portfolio is, or becomes, ineligible for the Adviser to claim an exclusion from the definition of the term “commodity pool operator” with respect to such Portfolio, the Portfolio may consider steps in order to continue to qualify for exemption from CFTC regulation, or may determine to operate subject to CFTC regulation.

Event-Linked Exposure

Certain Portfolios may obtain event-linked exposure by investing in “event-linked bonds,” or “event-linked swaps” or implement “event-linked strategies.” Event-linked exposure results in gains that typically are contingent on the non-occurrence of a specific “trigger” event, such as a hurricane, earthquake, or other physical or weather-related phenomena. Some event-linked bonds are commonly referred to as “catastrophe bonds.” They may be issued by government agencies, insurance companies, reinsurers, special purpose corporations or other on-shore or off-shore entities (such special purpose entities are created to accomplish a narrow and well-defined objective, such as the issuance of a note in connection with a reinsurance transaction). If a trigger event causes losses exceeding a specific amount in the geographic region and time period specified in a bond, a Portfolio investing in the bond may lose a portion or all of its principal invested in the bond. If no trigger event occurs, the Portfolio will recover its principal plus interest. For some event-linked bonds, the trigger event or losses may be based on company-wide losses, index portfolio losses, industry indices, or readings of scientific instruments rather than specific actual losses. Often the event-linked bonds provide for extensions of maturity that are mandatory, or optional at the discretion of the issuer, in order to process and audit loss claims in those cases where a trigger event has, or possibly has, occurred. An extension of maturity may increase volatility. In addition to the specified trigger events, event-linked bonds may also expose a Portfolio to certain unanticipated risks including but not limited to issuer risk, credit risk, counterparty risk and adverse tax consequences.

Event-linked bonds are a relatively new type of financial instrument. As such, there is no significant trading history of these securities, and there can be no assurance that a liquid market in these instruments will develop. See “Private Placement Transactions and Illiquid Assets” below. Lack of a liquid market may impose the risk of higher transaction costs and the possibility that a Portfolio may be forced to liquidate positions when it would not be advantageous to do so. Event-linked bonds are typically rated, and a Portfolio will only invest in catastrophe bonds that meet the credit quality requirements for the Portfolio.

Firm Commitment Agreements, “When Issued” Securities and Delayed-Delivery Transactions

Each Portfolio may enter into firm commitment agreements for the purchase of securities at an agreed upon price on a specified future date. A Portfolio may purchase new issues of securities on a “when issued” basis, whereby the payment obligation and interest rate on the instruments are fixed at the time of the transaction, or purchase or sell securities for delayed delivery (i.e., payment or delivery occur beyond the normal settlement date at a stated price and

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yield). Such transactions might be entered into, for example, when the manager of a Portfolio anticipates a decline in the yield of securities of a given issuer and is able to obtain a more advantageous yield by committing currently to purchase securities to be issued or delivered later.

A Portfolio will not enter into such a transaction for the purpose of investment leverage. Liability for the purchase price - and all the rights and risks of ownership of the securities - accrue to the Portfolio at the time it becomes obligated to purchase such securities, although delivery and payment occur at a later date. Accordingly, if the market price of the security should decline, the effect of the agreement would be to obligate the Portfolio to purchase the security at a price above the current market price on the date of delivery and payment. During the time the Portfolio is obligated to purchase such securities it may maintain in a segregated account U.S. Government securities, high-grade debt obligations, cash or cash equivalents or other liquid assets of an aggregate current value sufficient to make payment for the securities. The longer the period between purchase and settlement, the greater the risks and the longer the period during which alternative investment options are unavailable to the Portfolio. When the Portfolios engage in when-issued or delayed-delivery transactions, they rely on the other party to consummate the trade. Failure of the seller to do so may result in a Portfolio’s incurring a loss or missing an opportunity to obtain a price considered to be advantageous.

Foreign Securities, Foreign Currencies, Foreign Interest Rates, Depositary Receipts, and Synthetic Local Access Instruments

Investors should recognize that investing in foreign markets involves certain risks, including but not limited to those discussed below. For additional risks related to foreign investments, see “Additional Risks of Options on Foreign Currencies, Forward Contracts and Foreign Instruments.”

Foreign Securities. Each Portfolio may invest in foreign securities, subject to the limitations of its investment objective and strategies.

There may be less publicly available information about foreign companies comparable to the reports and ratings published about companies in the U.S. Foreign companies are not generally subject to uniform accounting or financial reporting standards, and auditing practices and requirements may not be comparable to those applicable to U.S. companies. The Portfolios, therefore, may encounter difficulty in obtaining market quotations for purposes of valuing their assets and calculating their net asset value. Foreign markets have substantially less volume than the New York Stock Exchange and securities of some foreign companies are less liquid and more volatile than securities of comparable U.S. companies. Commission rates in foreign countries, which are generally fixed rather than subject to negotiation as in the U.S., are likely to be higher. In many foreign countries there is less government supervision and regulation of stock exchanges, brokers and listed companies than in the U.S. To the extent issuers domiciled in the U.S. have extensive business markets or operations overseas, certain of these risk factors may also be present when investing in the securities of those U.S. issuers.

Emerging Markets. Investments in companies domiciled in developing countries may be subject to potentially higher risks than investments in developed countries. These risks may be greater for some emerging market countries than others. Emerging market countries include countries determined by the Adviser or Sub-Adviser to have emerging market economies, taking into account a number of factors, such as the country’s credit rating, its political and economic stability and the development of its financial and capital markets. Emerging market countries, but are not limited to, countries that comprise the MSCI Emerging Markets Index. A company is considered to be an emerging market company if the adviser determines that the company meets one or more of the following criteria: the company (1) is organized under the laws of, or has its principal office in an emerging market country; (2) has its principal securities trading market in an emerging market country; and/or (3) derives the majority of its annual revenue or earnings or assets from goods produced, sales made or services performed in an emerging market country. These risks include (i) less social, political and economic stability; (ii) the small current size of the markets for such securities and the currently low or nonexistent volume of trading, which result in a lack of liquidity and in greater price volatility; (iii) certain national policies which may restrict each Portfolio’s investment opportunities, including restrictions on investment in issuers or industries deemed sensitive to national interests; (iv) foreign taxation; (v) the absence of developed legal structures governing private or foreign investment or allowing for judicial redress for injury to private property; (vi) the absence, until recently in many developing countries, of a capital market structure or market-oriented economy; and (vii) the possibility that recent favorable economic developments in some developing countries may be slowed or reversed by unanticipated political or social events in such countries.

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Shares of companies that only trade on an emerging market securities exchange are not likely to file reports with the SEC. The availability of financial information about such companies, and its reliability, may be compromised since such companies are generally not subject to the same regulatory, accounting, auditing or auditor oversight requirements applicable to companies that file reports with the SEC.

In addition, many countries in which the Portfolios may invest have experienced substantial, and in some periods extremely high, rates of inflation for many years. Inflation and rapid fluctuations in inflation rates have had and may continue to have negative effects on the economies and securities markets of certain countries. Moreover, the economies of some developing countries may differ favorably or unfavorably from the U.S. economy in such respects as growth of gross domestic product, rate of inflation, currency depreciation, capital reinvestment, resource self-sufficiency and balance of payments position.

Investments in developing countries may involve risks of nationalization, expropriation and confiscatory taxation. For example, the Communist governments of a number of Eastern European countries expropriated large amounts of private property in the past, in many cases without adequate compensation, and there can be no assurance that such expropriation will not occur in the future. In the event of expropriation, each Portfolio could lose a substantial portion of any investments it has made in the affected countries. Further, no accounting standards exist in certain developing countries. Finally, even though the currencies of some developing countries may be convertible into U.S. dollars, the conversion rates may be artificial to the actual market values and may be adverse to the shareholders of a Portfolio.

Frontier Markets. Investments in emerging markets may include, in some cases, investments in a sub-set of emerging markets known as frontier markets. Frontier market countries generally have smaller economies and less developed capital markets than traditional emerging markets, and, as a result, the risks of investing in emerging market countries are magnified in frontier market countries. Because frontier markets are among the smallest, least mature and least liquid of the emerging markets, investments in frontier markets generally are subject to a greater risk of loss than investments in developed markets or traditional emerging markets. Frontier market countries have smaller economies, less developed capital markets, more political and economic instability, weaker legal, financial accounting and regulatory infrastructure, and more governmental limitations on foreign investments than typically found in more developed countries, and frontier markets typically have greater market volatility, lower trading volume, lower capital flow, less investor participation, fewer large global companies and greater risk of a market shutdown than more developed markets. Frontier markets are more prone to economic shocks associated with political and economic risks than are emerging markets generally. While certain Portfolios may invest in emerging market issuers, no Portfolio, with the exception of the Emerging Markets Equity Portfolio, will invest in frontier market issuers as a principal investment strategy.

Asian Investing Risk. Certain of the Portfolios may invest a significant portion of their assets in Asian securities, and those Portfolios may be more volatile than a portfolio that is broadly diversified geographically. Such investments are subject to general economic and political conditions in Asia and the Asia region may be subject to a greater degree of economic, political and social instability than is the case in the U.S. and Europe. Many Asian countries can be characterized as emerging markets or newly industrialized and tend to experience more volatile economic cycles than developed countries and are subject to the risks described above under “Emerging Markets Risk.” Many countries in Asia have historically experienced political uncertainty, corruption, military intervention, social unrest and natural disasters.

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trading partners. Reduction in spending on products and services or changes in the U.S. or European economies or their relationships with countries in the region may cause an adverse impact on the regional economy, which may have a negative impact on a Portfolio’s investments. Most of the securities markets of Asia have substantially less volume than markets in the U.S., and equity and debt securities of most companies in Asia are less liquid and more volatile than equity and debt securities of U.S. companies of comparable size. In addition, Asia has historically depended on oil for most of its energy requirements. Almost all of its oil is imported. In the past, oil prices have had a major impact on the Asian economy. Further, the Asian region has in the past experienced earthquakes, mud slides and tidal waves of varying degrees of severity (e.g., tsunami), and the risks of such phenomena, and the damage resulting from natural disasters, continue to exist.

China Investing, Generally. In addition to the risks of investing in foreign securities, and the risks of emerging markets and Asian investing as described above, investing in China presents additional risks. Additional risks associated with investments in China and Hong Kong include exposure to currency fluctuations, less liquidity, expropriation, confiscatory taxation, nationalization, exchange control regulations (including currency blockage) and differing legal standards. Any spread of an infectious illness, public health threat or similar issue could reduce consumer demand or economic output, result in market closures, travel restrictions or quarantines, and generally have a significant impact on the Chinese economy, which in turn could adversely affect a Portfolio’s investments. Inflation and rapid fluctuations in inflation and interest rates have had, and may continue to have, negative effects on the economies and securities markets of China or Hong Kong. The Chinese government could, at any time, alter or discontinue economic reform programs implemented many years ago and could return to the prior, completely centrally planned, economy. Actual and threatened responses to such military conflicts, internal, social unrest, cyberattacks and other activities, including purchasing restrictions, sanctions, tariffs or cyberattacks on the Chinese government or Chinese companies, may adversely impact China’s economy and Chinese issuers of securities. Military conflicts, either in response to internal social unrest or conflicts with other countries, are an ever present consideration. The adoption or continuation of protectionist trade policies by one or more countries (including the U.S.) could lead to decreased demand for Chinese products and have an adverse effect on the Chinese securities markets. The current political climate has intensified concerns about heightened trade tensions between China and the United States, as each country has imposed, and may in the future impose additional, tariffs on the other country’s products. These actions may result in a significant reduction in international trade, the oversupply of certain manufactured goods, substantial price reductions of goods and possible failure of individual companies and/or large segments of China’s export industry, which could have a negative impact on a Portfolio’s performance. U.S. companies that source material and goods from China and those that make large amounts of sales in China would be particularly vulnerable to an escalation of trade tensions. Developments regarding the course and impact of changing trade policies between the U.S. and China are difficult to predict and it is unclear whether further tariffs may be imposed or other escalating actions may be taken in the future.

China Investing, Directly Through Stock Connect Programs. Exposure to China may be gained through investments in securities that are economically tied to China or, in some cases, through direct investment in China securities. In recent years, non-Chinese investors, including mutual funds, have been permitted to make investments usually only available to foreign investors through a quota license or by purchasing from specified brokers that have stock connect programs. China Stock Exchange-listed securities are available via brokers in Hong Kong through the Shanghai-Hong Kong Stock Connect program, through the Shenzhen-Hong Kong Stock Connect Program, and may be available in the future through additional stock connect programs as they are developed in different locations (collectively, “Stock Connect Programs”). The Shenzhen and Shanghai Stock Connect Programs are securities trading and clearing programs developed between the Stock Exchange of Hong Kong, the China Securities Depository and Clearing Corporation Limited and either the Shanghai Stock Exchange or the Shenzhen Stock Exchange. Investors through Stock Connect Programs are subject to PRC regulations and Shanghai or Shenzhen Stock Exchange listing rules, among others. The regulations governing Stock Connect Programs are relatively new, untested and subject to changes which could adversely impact a Portfolio's rights with respect to the securities. Investing in China A shares through Stock Connect Programs may be limited by aggregate and daily quota limitations. Additionally, investments

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through Stock Connect Programs are subject to various risks, including liquidity risk, currency risk, legal and regulatory uncertainty risk, execution risk, operational risk, tax risk, counterparty risk and credit risk. As of the date of this SAI, the Emerging Markets Equity Portfolio plans to invest in China A shares through Stock Connect Programs.

China Investing, Through Variable Interest Entities. A Portfolio may obtain exposure to companies based or operated in China by investing through legal structures known as variable interest entities (VIEs). Because of Chinese governmental restrictions on non-Chinese ownership of companies in certain industries in China, certain Chinese companies have used VIEs to facilitate foreign investment without distributing direct ownership of companies based or operated in China. In such cases, the Chinese operating company establishes an offshore company, and the offshore company enters into contractual arrangements (often through an intermediary entity) with the Chinese company. These contractual arrangements are intended to give the offshore company the ability to exercise power over and obtain economic rights from the Chinese company. Shares of the offshore company, in turn, are listed and traded on exchanges outside of China and are available to non-Chinese investors, such as the Fund. This arrangement allows non-Chinese investors in the offshore company to obtain economic exposure to the Chinese company without direct equity ownership in the Chinese company.

Foreign Currency. Each Portfolio’s management endeavors to buy and sell foreign currencies on as favorable a basis as practicable. Some price spread in currency exchange (to cover service charges) will be incurred, particularly when a Portfolio changes investments from one country to another or when proceeds of the sale of shares in U.S. dollars are used for purchase of securities in foreign countries. Also, some countries may adopt policies which would prevent the Portfolios from transferring cash out of the country or withhold portions of interest and dividends at the source. There is the possibility of cessation of trading on national exchanges, expropriation, nationalization or confiscatory taxation, withholding and other foreign taxes on income or other amounts, foreign exchange controls (which may include suspension of the ability to transfer currency from a given country), default in foreign government securities, political or social instability, or diplomatic developments which could affect investments in securities of issuers in foreign nations.

Each Portfolio may be affected either unfavorably or favorably by fluctuations in the relative rates of exchange between the currencies of different nations, by exchange control regulations and by indigenous economic and political developments. Further, certain currencies may not be internationally traded. Some countries in which the Portfolios may invest may also have fixed or managed currencies that are not free-floating against the U.S. dollar.

Certain currencies may experience a steady devaluation relative to the U.S. dollar. Any devaluations in the currencies in which a Portfolio’s securities are denominated may have a detrimental impact on that Portfolio. A Portfolio’s manager endeavors to follow a flexible policy seeking to avoid unfavorable consequences and to take advantage of favorable developments that may impact securities denominated in foreign currencies. The exercise of this

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flexible policy may include decisions to buy securities with substantial risk characteristics and other decisions such as changing the emphasis on investments from one nation to another and from one type of security to another. Some of these decisions may later prove profitable and others may not. No assurance can be given that profits, if any, will exceed losses.

Foreign Interest Rates. To the extent each Portfolio invests in debt securities denominated in a particular foreign currency, changes in interest rates in the domicile country of that currency will affect the value of the assets so invested and, consequently, the Portfolio’s share price. Rising interest rates in a foreign country, which often occur during times of inflation or a growing economy, are likely to cause the face value of a debt security denominated in that country’s currency to decrease, having a negative effect on the value of the Portfolio’s shares. Of course, interest rates have increased and decreased, sometimes very dramatically, in the past. These changes are likely to occur again in the future at unpredictable times. Fluctuations in foreign interest rates will not necessarily correspond with fluctuations in U.S. interest rates.

Depositary Receipts. The Portfolios may invest in sponsored and unsponsored American Depositary Receipts (“ADRs”), which are receipts issued by an American bank or trust company evidencing ownership of underlying securities issued by a foreign issuer. ADRs, in registered form, are designed for use in U.S. securities markets. Unsponsored ADRs may be created without the participation of the foreign issuer. Holders of these ADRs generally bear all the costs of the ADR facility, whereas foreign issuers typically bear certain costs in a sponsored ADR. The bank or trust company depositary of an unsponsored ADR may be under no obligation to distribute shareholder communications received from the foreign issuer or to pass through voting rights. The Portfolios may also invest in European Depositary Receipts (“EDRs”), Global Depositary Receipts (“GDRs”) and in other similar instruments representing securities of foreign companies. EDRs and GDRs are securities that are typically issued by foreign banks or foreign trust companies, although U.S. banks or U.S. trust companies may issue them. EDRs and GDRs are structured similar to the arrangements of ADRs. EDRs, in bearer form, are designed for use in European securities markets. Depositary Receipts are generally subject to the same sort of risks as direct investments in a foreign country, such as, currency risk, political and economic risk, and market risk, because their values depend on the performance of a foreign security denominated in its home currency.

Synthetic Local Access Instruments. Participation notes, market access warrants, and other similarly structured products (collectively, “synthetic local access instruments”) are derivative instruments typically used by foreign investors to obtain exposure to investments in certain markets where direct ownership by foreign investors is restricted or limited by local law. Synthetic local access instruments are generally structured by a local branch of a bank, broker-dealer, or other financial institution to replicate exposure to one or more underlying securities. The holder of a synthetic local access instrument may be entitled to receive any dividends paid in connection with the underlying securities, but usually does not receive voting rights as it would if such holder directly owned the underlying securities.

Synthetic local access instruments also involve risks that are in addition to the risks normally associated with a direct investment in the underlying securities. Synthetic local access instruments represent unsecured, contractual obligations of the banks, broker-dealers, or other financial institutions that issue them and are therefore subject to the credit risk of the issuer and the issuer’s ability or willingness to perform in accordance with the terms of the instrument. Synthetic local access instruments are subject to the liquidity risk of the underlying security as well as the liquidity risk that a limited or no secondary market exists for trading synthetic local access instruments. In addition, the trading price of a synthetic local access instrument, if any, may not equal the value of the underlying securities.

High Yield, High Risk Bonds

Each of the Portfolios, except the Government Money Market Portfolio, may invest in high yield, high risk bonds, commonly referred to as “junk” bonds. The Fund considers a debt security to be a junk bond if the debt security is rated below investment grade by at least two of the three credit ratings agencies used by the Fund (BB+ or lower by S&P Ba1 or lower by Moody's; BB+ or lower by Fitch), or if unrated, determined by the Portfolio's Adviser or Sub-Adviser to be of comparable quality. The total return and yield of junk bonds generally can be expected to fluctuate more than the total return and yield of higher quality, shorter term bonds, but may not fluctuate as much as those of common stocks. Junk bonds are regarded as predominantly speculative with respect to the issuer’s continuing ability to meet principal and interest payments.

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Investments in securities rated below investment grade that are eligible for purchase by certain Portfolios are described as “speculative” by Moody’s, S&P and Fitch. Investment in lower rated corporate debt securities (“high yield securities” or “junk bonds”) and securities of distressed companies generally provides greater income and increased opportunity for capital appreciation than investments in higher quality securities, but they also typically entail greater price volatility and principal and income risk. Securities of distressed companies include both debt and equity securities. High yield securities and debt securities of distressed companies are regarded as predominantly speculative with respect to the issuer’s continuing ability to meet principal and interest payments, issuers of high yield and distressed company securities may be involved in restructurings or bankruptcy proceedings that may not be successful. Analysis of the creditworthiness of issuers of debt securities that are high yield or debt securities of distressed companies may be more complex than for issuers of higher quality debt securities.

High yield securities and debt securities of distressed companies may be more susceptible to real or perceived adverse economic and competitive industry conditions than investment grade securities. The prices of these securities have been found to be less sensitive to interest-rate changes than higher-rated investments, but more sensitive to adverse economic downturns or individual corporate developments. A projection of an economic downturn or of a period of rising interest rates, for example, could cause a decline in prices of high yield securities and debt securities of distressed companies because the advent of a recession could lessen the ability of a highly leveraged company to make principal and interest payments on its debt securities. If an issuer of securities defaults, in addition to risking payment of all or a portion of interest and principal, the Portfolios by investing in such securities, may incur additional expenses to seek recovery of their respective investments. In the case of securities structured as zero-coupon or pay-in-kind securities, their market prices are affected to a greater extent by interest rate changes, and therefore tend to be more volatile than securities which pay interest periodically and in cash.

The secondary market on which high yield and distressed company securities are traded may be less liquid than the market for higher grade securities. Less liquidity in the secondary trading market could adversely affect the price at which the Portfolios could sell a high yield or distressed company security, and could adversely affect the daily net asset value of the shares. Adverse publicity and investor perceptions, whether or not based on fundamental analysis, may decrease the values and liquidity of high yield and distressed company securities, especially in a thinly-traded market. When secondary markets for high yield and distressed company securities are less liquid than the market for higher grade securities, it may be more difficult to value the securities because such valuation may require more research, and elements of judgment may play a greater role in the valuation because there is less reliable, objective data available.

The use of credit ratings as the sole method of evaluating high yield securities and debt securities of distressed companies can involve certain risks. For example, credit ratings evaluate the safety of principal and interest payments of a debt security, not the market value risk of a security. Also, credit rating agencies may fail to change credit ratings in a timely fashion to reflect events since the security was last rated. The Adviser and Sub-Adviser do not rely solely on credit ratings when selecting debt securities for the Portfolios, and develop their own independent analysis of issuer credit quality. If a credit rating agency changes the rating of a debt security held by a Portfolio, the Portfolio may retain the security if the Adviser or Sub-Adviser deems it in the best interest of shareholders.

Hybrid Instruments

Hybrid instruments can be an efficient means of creating exposure to a particular market, or segment of a market, with the objective of enhancing total return. Each of the Portfolios (except for the Government Money Market Portfolio) may invest in hybrid instruments. Hybrid instruments combine the elements of futures contracts or options with those of debt, preferred equity or a depository instrument. Normally, a hybrid instrument may be a debt security, preferred stock, depository share, trust certificate, certificate of deposit or other evidence of indebtedness on which a portion of or all interest payments, and/or the principal or stated amount payable at maturity, redemption, or retirement is determined by reference to prices, changes in prices, or differences between prices of underlying assets such as, for example, securities, currencies, intangibles, goods, articles or commodities. Alternatively, interest and/or principal or stated amounts payable may be determined by reference to a benchmark such as, for example, another objective index, economic factor, or other measure, interest rates, currency exchange rates, or commodity or securities indices. Because of these structural differences, hybrid instruments may take a variety of forms, including, but not limited to, debt instruments with interest or principal payments or redemption terms determined by reference to the value of a currency or commodity or securities index at a future point in time, preferred stock with dividend rates determined by reference to the value of a currency or commodity or securities index at a future point in time, preferred stock with dividend rates

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determined by reference to the value of a currency, or convertible securities with the conversion terms related to a particular commodity. Hybrids may also include range floaters which are a deposit or a note that accrues interest daily when the underlying reference point is within a predetermined range and accrues at a below-market rate (normally 0%) when outside that range.

Inverse floaters are debt instruments whose interest rate bears an inverse relationship to the interest rate on another instrument or index. For example, upon reset the interest rate payable on a security may go down when the underlying index has risen. Certain inverse floaters may have an interest rate reset mechanism that multiplies the effects of change in the underlying index. Such mechanism may increase the volatility of the security’s market value. See “Adjustable Rate Securities (including Variable, Floating and Inverse Floating Rate) and Master Demand Notes” above for additional information.

There is no guarantee that the use of hybrid instruments will be successful, and a Portfolio could lose money if, for example, interest rates do not move as anticipated or credit problems develop with the issue of the hybrid instrument. Additionally, the risks of investing in hybrid instruments reflect a combination of the risks of investing in securities, options, futures and currencies, and the underlying benchmarks or prices for the underlying assets may be highly volatile and this volatility may be magnified still further by the terms of the hybrid instrument itself. Also, the prices of the hybrid instrument and the benchmark or underlying asset may not move in the same direction or at the same time. Hybrid instruments may bear interest or pay dividends at below market (or even relatively nominal) rates, or bear interest at above market rates but bear an increased risk of principal loss (or gain). The latter situation may result in leverage, meaning that the hybrid instrument is structured such that the risk of loss, as well as the potential for gain, is magnified. Under certain conditions, the redemption value of such an instrument could even be zero. Hybrid instruments may also involve greater liquidity risk than other types of investments; since they are often individually negotiated to meet the portfolio needs of a particular investor, the number of other investors that are willing and able to buy such investments in the secondary market may be smaller than that for more traditional investments. Hybrid instruments also may not be subject to regulation by federal agencies such as the CFTC and the SEC, which generally regulate the trading of commodities and securities, respectively.

Inflation-Indexed Bonds

The Portfolios may purchase inflation-linked securities issued by the U.S. Treasury, U.S. government agencies and instrumentalities other than the U.S. Treasury, and entities other than the U.S. Treasury or U.S. government agencies and instrumentalities. Inflation-indexed bonds are debt instruments whose principal value is adjusted periodically according to a rate of inflation (usually a consumer price index). Two structures are most common. The U.S. Treasury and some other issuers use a structure that accrues inflation into the principal value of the bond. Most other issuers pay out the inflation accruals as part of the semiannual coupon.

Inflation-linked securities are designed to offer a return linked to inflation, thereby protecting future purchasing power of the money invested in them. However, inflation-linked securities provide this protected return only if held to maturity. In addition, inflation-linked securities may not trade at par value. Real interest rates (the market rate of interest less the anticipated rate of inflation) change over time as a result of many factors, such as what investors are demanding as a true value for money. When real rates do change, inflation-linked securities prices will be more sensitive to these changes than conventional bonds, because these securities were sold originally based upon a real interest rate that is no longer prevailing. Should market expectations for real interest rates rise, the price of inflation-linked securities and the share price of a Portfolio holding these securities will fall. Investors in the Portfolios should be prepared to accept not only this share price volatility but also the possible adverse tax consequences it may cause.

An investment in securities featuring inflation-adjusted principal and/or interest involves factors not associated with more traditional fixed principal securities. Such factors include the possibility that the inflation index may be subject to significant changes, those changes in the index may or may not correlate to changes in interest rates generally or changes in other indices, or that the resulting interest may be greater or less than that payable on other securities of similar maturities. In the event of sustained deflation, it is possible that the amount of semiannual interest payments, the inflation-adjusted principal of the security and the value of the stripped components, will decrease. If any of these possibilities are realized, a Portfolio’s net asset value could be negatively affected.

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Inflation-linked Treasury Securities. Inflation-linked U.S. Treasury securities are U.S. Treasury securities with a final value and interest payment stream linked to the inflation rate. Inflation-linked U.S. Treasury securities may be issued in either note or bond form. Inflation-linked U.S. Treasury notes have maturities of at least one year, but not more than 10 years. Inflation-linked U.S. Treasury bonds have maturities of more than 10 years.

Inflation-linked U.S. Treasury securities may be attractive to investors seeking an investment backed by the full faith and credit of the U.S. government that provides a return in excess of the rate of return or inflation. These securities were first sold in the U.S. market in January 1997. Inflation-linked U.S. Treasury securities are auctioned and issued on a quarterly basis.

Structure and Inflation Index – The principal value of inflation-linked U.S. Treasury securities will be adjusted to reflect changes in the level of inflation. The index for measuring the inflation rate for inflation-linked U.S. Treasury securities is the non-seasonally adjusted U.S. City Average All Items Consumer Price Index for All Urban Consumers (Consumer Price Index) published monthly by the U.S. Department of Labor’s Bureau of Labor Statistics.

Semiannual coupon interest payments are made at a fixed percentage of the inflation-linked principal value. The coupon rate for the semiannual interest rate of each issuance of inflation-linked U.S. Treasury securities is determined at the time the securities are sold to the public (i.e., by competitive bids in the auction). The coupon rate will likely reflect real yields available in the U.S. Treasury market; real yields are the prevailing yields on U.S. Treasury securities with similar maturities, less then-prevailing inflation expectations. While a reduction in inflation will cause a reduction in the interest payment made on the securities, the repayment of principal at the maturity of the security is guaranteed by the U.S. Treasury to be no less than the original face or par amount of the security at the time of issuance.

Indexing Methodology – The principal value of inflation-linked U.S. Treasury securities will be indexed, or adjusted, to account for changes in the Consumer Price Index. Semiannual coupon interest payment amounts will be determined by multiplying the inflation-linked principal amount by one-half the stated rate of interest on each interest payment date.

Taxation – The taxation of inflation-linked U.S. Treasury securities is similar to the taxation of conventional bonds. Both interest payments and the difference between original principal and the inflation-adjusted principal will be treated as interest income subject to taxation. Interest payments are taxable when received or accrued. The inflation adjustment to the principal is subject to tax in the year the adjustment is made, not at maturity of the security when the cash from the repayment of principal is received. If an upward adjustment has been made (which typically should happen), investors in non-tax-deferred accounts will pay taxes on this amount currently. Decreases in the indexed principal can be deducted only from current or previous interest payments reported as income.

U.S. Government Agencies. A number of U.S. government agencies and instrumentalities other than the U.S. Treasury may issue inflation-linked securities. Some U.S. government agencies have issued inflation-linked securities whose design mirrors that of the inflation-linked U.S. Treasury securities described above.

Other Entities. Entities other than the U.S. Treasury or U.S. government agencies and instrumentalities may issue inflation-linked securities. While some entities have issued inflation-linked securities whose design mirrors that of the inflation-linked U.S. Treasury securities described above, others utilize different structures. For example, the principal value of these securities may be adjusted with reference to the Consumer Price Index, but the semiannual coupon interest payments are made at a fixed percentage of the original issue principal. Alternatively, the principal value may remain fixed, but the coupon interest payments may be adjusted with reference to the Consumer Price Index.

Initial Public Offerings; Smaller Capitalization Companies; Unseasoned Issuers

Each Portfolio may participate in initial public offerings. A Portfolio that purchases securities issued in an IPO is subject to the risk that the value of the securities may rise or fall more rapidly than other investments. Prior to an IPO, there is generally no public market for an issuer’s common stock. There can be no assurance that an active trading market will develop or be sustained following the IPO, therefore, the market price for the securities may be subject to significant fluctuations and a Portfolio may be affected by such fluctuations. In addition, securities issued in an IPO are often issued by a company that may be in the early stages of development with a history of little or no revenues and such company may operate at a loss following the offering. A Portfolio’s ability to obtain shares of an IPO security may be substantially limited in the event of high demand for the securities and there is no guarantee that the Portfolio will receive an allocation of shares. For IPO offerings in which the Adviser or Sub-Adviser of a Portfolio is offered a

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relatively small number of shares, a disproportionate number of such shares may be allocated to that Portfolio, in the Adviser’s or Sub-Adviser’s discretion. To the extent a Portfolio invests in IPOs, a significant portion of its returns may be attributable to its investments in IPOs, which have a magnified impact on Portfolios with small asset bases. There is no guarantee that as those Portfolios’ assets grow they will continue to experience substantially similar performance by investing in IPOs.

Investing in securities of companies with continuous operations of less than three years (“unseasoned issuers”) may involve greater risks since these securities may have limited marketability and, thus, may be more volatile than securities of larger, more established companies or the market in general. Because such companies normally have fewer shares outstanding than larger companies, it may be more difficult for a Portfolio to buy or sell significant amounts of such shares without an unfavorable impact on prevailing prices. These companies may have limited product lines, markets or financial resources and may lack management depth. In addition, these companies are typically subject to a greater degree of changes in earnings and business prospects than are larger, more established companies. There is typically less publicly available information concerning these companies than for larger, more established ones. Although investing in securities of unseasoned issuers offers potential for above average returns if the companies are successful, the risk exists that the companies will not succeed and the prices of the companies’ shares could significantly decline in value.

Investment Company Securities And Exchange Traded Funds

The Portfolios may invest in securities of other investment companies, subject to the provisions of Section 12(d)(1) of the 1940 Act and rules and regulations thereunder. Investment companies may include index based investments such as exchange traded funds (“ETFs”), which hold substantially all of their assets in securities representing their specific index. Accordingly, the main risk of investing in index based investments is the same as investing in a portfolio of equity securities comprising the index, although lack of liquidity in an ETF could result in it being more volatile. As a shareholder of another investment company, a Portfolio would bear its pro rata portion of the other investment company’s expenses, including advisory fees, in addition to the expenses a Portfolio bears directly in connection with its own operation. The market prices of index based investments will fluctuate in accordance with both changes in the market value of their underlying portfolio securities and due to supply and demand for the instruments on the exchanges on which they are traded (which may result in their trading at a discount or premium to their net asset values). Index based investments may not replicate exactly the performance of their specific index because of transaction costs and because of the temporary unavailability of certain component securities of the index.

Each of the Active/Passive Balanced and Active/Passive Moderate Portfolios (the “Allocation Portfolios”) invests in other Portfolios of the Fund and ETFs. The Allocation Portfolios may pursue the equity component of their investment strategies by investing its assets in one or more of the following other Fund Portfolios: Growth Stock, Focused Appreciation, Large Cap Core Stock, Large Cap Blend, Index 500 Stock, Large Company Value, Domestic Equity, Equity Income, Mid Cap Growth, Index 400 Stock, Mid Cap Value, Small Cap Growth Stock, Index 600 Stock, Small Cap Value, International Growth, Research International Core, International Equity and Emerging Markets Equity Portfolios (the “Underlying Portfolios”). Each of the Allocation Portfolios may pursue the fixed income component of their investment strategies by investing its assets in one or more of the following other Fund Portfolios: Government Money Market Portfolio, Short-Term Bond Portfolio, Select Bond Portfolio, Long-Term Government Bond Portfolio, Inflation Managed Portfolio, High Yield Bond Portfolio, and Multi-Sector Bond Portfolio (each also an “Underlying Portfolio”). In addition, each of the Allocation Portfolios may invest in ETFs as a principal investment strategy and for specific purposes, such as gaining additional exposure to certain markets, sectors, or regions, as a cash equivalent alternative investment, and for other purposes described in the Prospectus. For more information about the Underlying Portfolios, please see the Fund’s Prospectus.

Loans (including Senior Loans) and Other Direct Debt Instruments

Each of the Portfolios may invest in fixed and/or floating rate loans and other direct debt instruments. Direct debt instruments are interests in amounts owed by a corporate, governmental, or other borrower to lenders or lending syndicates (loans and loan participations), to suppliers of goods or services (trade claims or other receivables), or to other parties. Direct debt instruments involve a risk of loss in case of default or insolvency of the borrower and may offer less legal protection to the purchaser in the event of fraud or misrepresentation, or there may be a requirement that a Portfolio supply additional cash to a borrower on demand.

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Purchasers of loans and other forms of direct indebtedness depend primarily upon the creditworthiness of the borrower for payment of interest and repayment of principal. If scheduled interest or principal payments are not made, the value of the instrument may be adversely affected. Loans that are fully secured provide more protections than an unsecured loan in the event of failure to make scheduled interest or principal payments. However, there is no assurance that the liquidation of collateral from a secured loan would satisfy the borrower’s obligation, or that the collateral could be liquidated. Indebtedness of borrowers whose creditworthiness is poor involves substantially greater risks and may be highly speculative. Borrowers that are in bankruptcy or restructuring may never pay off their indebtedness, or may pay only a small fraction of the amount owed.

Investments in loans through direct assignment of a financial institution’s interests with respect to a loan may involve additional risks. For example, if a loan is foreclosed, the purchaser could become part owner of any collateral, and would bear the costs and liabilities associated with owning and disposing of the collateral. In addition, it is conceivable that under emerging legal theories of lender liability, a purchaser could be held liable as a co-lender. Direct debt instruments may also involve a risk of insolvency of the lending bank or other intermediary. A loan is often administered by a bank or other financial institution that acts as agent for all holders. The agent administers the terms of the loan, as specified in the loan agreement. Unless, under the terms of the loan or other indebtedness, the purchaser has direct recourse against the borrower, the purchaser may have to rely on the agent to apply appropriate credit remedies against a borrower. If assets held by the agent for the benefit of a purchaser were determined to be subject to the claims of the agent’s general creditors, the purchaser might incur certain costs and delays in realizing payment on the loan or loan participation and could suffer a loss of principal or interest. Direct indebtedness may include letters of credit, revolving credit facilities, or other standby financing commitments that obligate purchasers to make additional cash payments on demand. These commitments may have the effect of requiring a purchaser to increase its investment in a borrower at a time when it would not otherwise have done so, even if the borrower’s condition makes it unlikely that the amount will ever be repaid.

Loan instruments may not be readily marketable and may be subject to restrictions on resale. In some cases, negotiations involved in disposing of loans may require weeks to complete. Thus, transactions in loan instruments may take longer than seven days to settle. This could pose a liquidity risk to the Fund and, if the Fund’s exposure to such investments is substantial, could impair the Fund’s ability to meet redemptions in a timely manner. Loans and other forms of indebtedness may be structured such that they are not securities under securities laws. As such, it is unclear whether loans and other forms of direct indebtedness offer securities law protections, such as those against fraud and misrepresentation. In the absence of definitive regulatory guidance, while there can be no assurance that fraud or misrepresentation will not occur with respect to the loans and other investments in which the Fund invests, the Fund relies on the Adviser’s or Sub-Adviser’s (as applicable) research in an attempt to seek to avoid situations where fraud or misrepresentation could adversely affect the Fund.

The Portfolios limit the amount of total assets that they will invest in issuers within the same industry (see the Portfolios’ investment limitations). For purposes of these limitations, a Portfolio generally will treat the borrower as the “issuer” of indebtedness held by the Portfolio. In the case of loan participations where a bank or other lending institution serves as financial intermediary between a Portfolio and the borrower, if the participation does not shift to the Portfolio the direct debtor-creditor relationship with the borrower, SEC interpretations require a Portfolio, in appropriate circumstances, to treat both the lending bank or other lending institution and the borrower as “issuers” for these purposes. Treating a financial intermediary as an issuer of indebtedness may restrict a Portfolio’s ability to invest in indebtedness related to a single financial intermediary, or a group of intermediaries engaged in the same industry, even if the underlying borrowers represent many different companies and industries.

The Portfolios, and in particular the Multi-Sector Bond Portfolio, may also invest in “senior loans.” Senior loans are loans made to companies whose creditworthiness is speculative and is rated below investment-grade by the major credit rating agencies, or determined to be of comparable quality by the Adviser or Sub-Adviser. Senior loans are privately negotiated between a corporate borrower and one or more financial institutions and made available for investment in the bank loan market. A Portfolio may invest in senior loans directly by assignment of the loan from the lender or indirectly through the purchase of a participation interest from the lender. Under a loan assignment, the Portfolio generally will succeed to all the rights and obligations of an assigning lending institution and becomes a lender under the loan agreement with the borrower. Under a loan participation, the Portfolio will have a contractual relationship with the lender, not with the borrower, and will generally have the right to receive payments of principal and

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interest to which it is entitled only from the lender selling the participation and only upon receipt by the lender of the payments from the borrower. Investments in senior loans usually pay higher yields compared to investment-grade loans. The higher yields of senior loans represent the risk premium associated with lending to below investment-grade borrowers.

To the extent the Portfolios invest in senior loans, including bank loans, the Portfolios may be subject to greater levels of credit risk, call risk, settlement risk and liquidity risk. These instruments are considered predominantly speculative with respect to an issuer's continuing ability to make principal and interest payments and may be more volatile than other types of securities. An economic downturn or individual corporate developments could adversely affect the market for these instruments and reduce the Fund's ability to sell these instruments at an advantageous time or price. An economic downturn would generally lead to a higher non-payment rate, and, a senior loan may lose significant market value before a default occurs. A Portfolio may also be subject to greater levels of liquidity risk as a result of this type of investment. In addition, the senior loans in which a Portfolio invests may not be listed on any exchange and a secondary market for such loans may be comparatively limited relative to markets for other more liquid fixed income securities. Consequently, transactions in senior loans may involve greater costs than transactions in more actively traded securities. Senior loans that are considered to be “covenant-lite” loans contain fewer or less restrictive constraints on the borrower than certain other types of loans, and consequently offer less protection to the loan holder. Covenant-lite loans may have increased credit risk and call risk, and may also be subject to heightened liquidity risk. Restrictions on transfers in loan agreements, a lack of publicly-available information, irregular trading activity and wide bid/ask spreads among other factors, may, in certain circumstances, make senior loans more difficult to sell at an advantageous time or price than other types of securities or instruments. These factors may result in a Portfolio being unable to realize full value for the senior loans and/or may result in a Portfolio not receiving the proceeds from a sale of a senior loan for an extended period after such sale, each of which could result in losses to a Portfolio. Senior loans may have extended trade settlement periods, including settlement periods of greater than 7 days, which may result in cash not being immediately available to a Portfolio. If an issuer of a senior loan prepays or redeems the loan prior to maturity, a Portfolio may have to reinvest the proceeds in other senior loans or similar instruments that pay lower interest rates. Because of the risks involved in investing in senior loans, an investment in a Portfolio that invests in such instruments should be considered speculative.

Money Market Instruments

Each Portfolio is authorized to invest up to 100% of its total assets in short-term money market obligations for temporary defensive purposes. Money market instruments, or short-term debt instruments, consist of obligations such as commercial paper, bank obligations (e.g., certificates of deposit and bankers’ acceptances), repurchase agreements, and various government obligations, such as Treasury bills. Money market instruments may be structured to be, or may employ a trust of other form so that they are, eligible investments for money market funds. For example, put features can be used to modify the maturity of a security or interest rate adjustment features can be used to enhance price stability. If a structure fails to function as intended, adverse tax or investment consequences may result. Neither the Internal Revenue Service (IRS) nor any other regulatory authority has ruled definitively on certain legal issues presented by certain structured securities. Future tax or other regulatory determinations could adversely affect the value, liquidity, or tax treatment of the income received from these securities. Commercial paper is a money market instrument issued by banks or companies to raise money for short-term purposes. Unlike some other debt obligations, commercial paper is typically unsecured. Commercial paper may be issued as an asset-backed security.

Certificates of deposit are negotiable certificates issued against funds deposited in a commercial bank for a definite period of time and earning a specified return. Bankers’ acceptances are negotiable drafts or bills of exchange, normally drawn by an importer or exporter to pay for specific merchandise, which are “accepted” by a bank, meaning, in effect, that the bank unconditionally agrees to pay the face value of the instrument on maturity. Fixed time deposits are bank obligations payable at the stated maturity date and bearing interest at a fixed rate. Fixed time deposits may be withdrawn on demand by the investor, but may be subject to early withdrawal penalties which vary depending upon market conditions and the remaining maturity of the obligation. There are no contractual restrictions on the right to transfer a beneficial interest in a fixed time deposit to a third party, although there is no market for such deposits. A Portfolio will not invest in fixed time deposits which (1) are not subject to prepayment or (2) provide for withdrawal penalties upon prepayment (other than overnight deposits) if, in the aggregate, more than 15% (5% for the Government Money Market Portfolio) of its net assets would be invested in such deposits, repurchase agreements maturing in more than seven days and other illiquid assets.

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Obligations of foreign banks involve somewhat different investment risks than those affecting obligations of U.S. banks, including the possibilities that their liquidity could be impaired because of future political and economic developments, that their obligations may be less marketable than comparable obligations of U.S. banks, that a foreign jurisdiction might impose withholding taxes on interest income payable on those obligations, that foreign deposits may be seized or nationalized, that foreign governmental restrictions such as exchange controls may be adopted which might adversely affect the payment of principal and interest on those obligations and that the selection of those obligations may be more difficult because there may be less publicly available information concerning foreign banks or the accounting, auditing and financial reporting standards, practices and requirements applicable to foreign banks may differ from those applicable to U.S. banks. Foreign banks are not generally subject to examination by a U.S. Government agency or instrumentality.

Government Money Market Portfolio Investments. With respect to the Government Money Market Portfolio’s purchase of money market instruments, Rule 2a-7 under the 1940 Act prescribes certain investment limitations to control credit risk and interest rate risk.

As a “government money market portfolio” as defined under Rule 2a-7, the Government Money Market Portfolio invests at least 99.5% of its total assets in cash, U.S. Treasury bills, notes and other obligations issued or guaranteed as to principal and interest by the U.S. Government, its agencies or instrumentalities, and repurchase agreements secured by such obligations or cash. In addition, the securities purchased by the Government Money Market Portfolio are subject to the quality, diversification, and other requirements of Rule 2a-7 and other SEC rules. For example, Rule 2a-7 limits a money market fund to investing in securities that have remaining maturities of 397 calendar days or less. Also, the Government Money Market Portfolio must maintain a dollar weighted average maturity of no more than 60 calendar days. For purposes of the foregoing limits, the Government Money Market Portfolio may calculate maturity of certain adjustable rate securities in accordance with applicable regulation, which permits the Portfolio to deem the maturity of certain securities to be the next interest readjustment date or the next date that the principal amount can be recovered through demand. In addition, the Government Money Market Portfolio must maintain a dollar weighted average life to maturity without regard to interest readjustment dates of no more than 120 calendar days. The Portfolio will purchase only securities that are Eligible Securities under Rule 2a-7. When required under 2a-7, BlackRock will determine whether an instrument presents minimal credit risk pursuant to guidelines approved by the board of directors of the Fund.

Discretionary Liquidity Fee – The board of directors of the Fund has discretion to impose a liquidity fee of up to 2% upon redemptions of shares of the Government Money Market Portfolio if such fee is determined to be in the best interests of the Government Money Market Portfolio. Accordingly, redemptions of the Government Money Market Portfolio may be subject to a liquidity fee at certain times.

Mortgage-Backed Securities; Asset-Backed Securities; Other Pass-Through Securities

The Portfolios may invest in various types of pass-through securities, such as mortgage-backed securities, asset-backed securities, credit-linked trust certificates, traded custody receipts and participation interests. A pass-through security is a share or certificate of interest in a pool of debt obligations that have been repackaged by an intermediary, such as a bank or broker-dealer. The purchaser of a pass-through security receives an undivided interest in the underlying pool of securities. The issuers of the underlying securities make interest and principal payments to the intermediary, which are passed through to purchasers, such as the Portfolios.

The Portfolios also may invest in pass-through securities, which are interests evidencing direct ownership of a pool of debt securities. Holders of the interests are entitled to receive distributions of interest, principal and other payments on each of the underlying debt securities (less expenses). The underlying debt securities have a specified maturity but are subject to prepayment risk because if an issuer prepays the principal, a Portfolio may have additional cash to invest at a time when prevailing interest rates have declined and reinvestment of the funds is made at a lower rate. The value of the underlying debt securities may change due to changes in market interest rates. If interest rates rise, the value of the underlying debt securities, and therefore the value of the pass through security, may decline. If the underlying debt securities are high yield securities, the risks associated with high yield/high risk securities discussed in this SAI and in the Portfolios’ Prospectus may apply.

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The most common type of pass-through securities are mortgage-backed securities. Interests in pools of mortgage related securities differ from other forms of debt securities, which normally provide for periodic payment of interest in fixed amounts with principal payments at maturity or specified call dates. Instead, these securities provide a monthly payment which consists of both interest and principal payments. In effect, these payments are a “pass-through” of the monthly payments made by the individual borrowers on their residential or commercial mortgage loans, net of any fees paid to the issuer or guarantor of such securities. Additional payments are caused by repayments of principal resulting from the sale of the underlying property, refinancing or foreclosure, net of fees or costs which may be incurred. The rate of prepayments on underlying mortgages will affect the price and volatility of a mortgage related security, and may have the effect of shortening or extending the effective duration of the security relative to what was anticipated at the time of purchase. To the extent that unanticipated rates of prepayment on underlying mortgages increase the effective duration of a mortgage related security, the volatility of such security can be expected to increase.

Certificates issued by the Government National Mortgage Association (“Ginnie Mae Certificates”) are mortgage-backed securities that evidence an undivided interest in a pool of mortgage loans. Ginnie Mae Certificates differ from bonds in that principal is paid back monthly by the borrowers over the term of the loan rather than returned in a lump sum at maturity. A Portfolio will generally purchase “modified pass-through” Ginnie Mae Certificates, which entitle the holder to receive a share of all interest and principal payments paid and owned on the mortgage pool, net of fees paid to the “issuer” and Ginnie Mae, regardless of whether or not the mortgagor actually makes the payment. Ginnie Mae Certificates are backed as to the timely payment of principal and interest by the full faith and credit of the U.S. government.

The Government National Mortgage Association (“GNMA”) is the principal governmental guarantor of mortgage related securities. GNMA is a wholly owned United States Government corporation within the Department of Housing and Urban Development. GNMA is authorized to guarantee, with the full faith and credit of the United States Government, the timely payment of principal and interest on securities issued by institutions approved by GNMA (such as savings and loan institutions, commercial banks and mortgage bankers) and backed by pools of mortgages insured by the Federal Housing Administration (the “FHA”), or guaranteed by the Department of Veterans Affairs (the “VA”).

Government-related guarantors (i.e., not backed by the full faith and credit of the United States Government) include the Federal National Mortgage Association (“FNMA”) and the Federal Home Loan Mortgage Corporation (“FHLMC”). FNMA is a government sponsored corporation owned entirely by private stockholders. It is subject to general regulation by the Secretary of Housing and Urban Development. FNMA purchases conventional (i.e. not insured or guaranteed by any government agency) residential mortgages from a list of approved seller/servicers which include state and federally chartered savings and loan associations, mutual savings banks, commercial banks and credit unions and mortgage bankers. FNMA issues guaranteed mortgage pass-through certificates (“Fannie Mae Certificates”). Fannie Mae Certificates resemble Ginnie Mae Certificates in that each Fannie Mae Certificate represents a pro rata share of all interest and principal payments made and owned on the underlying pool. Pass-through securities issued by FNMA are guaranteed as to timely payment of principal and interest by FNMA but are not backed by the full faith and credit of the United States Government.

FHLMC was created by Congress in 1970 for the purpose of increasing the availability of mortgage credit for residential housing. It is a government sponsored corporation formerly owned by the twelve Federal Home Loan Banks and now owned entirely by private stockholders. FHLMC issues two types of mortgage pass-through securities: mortgage participation certificates (“PCs”) and guaranteed mortgage certificates (“GMCs”). PCs, which are pass-through securities, each representing an undivided interest in a pool of residential mortgages, resemble Ginnie Mae Certificates in that each PC represents a pro rata share of all interest and principal payments made and owned on the underlying pool. FHLMC guarantees timely payments of interest on PCs and the full return of principal. GMCs also represent a pro rata interest in a pool of mortgages. However, these instruments pay interest semiannually and return principal once a year in guaranteed minimum payments. FHLMC guarantees the timely payment of interest and ultimate collection of principal, but PCs are not backed by the full faith and credit of the United States Government.

On September 7, 2008, FNMA and FHLMC were placed under the conservatorship of the Federal Housing Finance Agency to provide stability in the financial markets, mortgage availability and taxpayer protection by preserving FNMA and FHLMC’s assets and property and putting FNMA and FHLMC in a sound and solvent condition. Under the conservatorship, the U.S. Treasury received senior preferred equity shares and warrants as a means to provide access to FNMA and FHLMC to significant financial support. Also at that time, the U.S. Treasury instituted a secured

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lending credit facility, available to FNMA and FHLMC to assist the entities in funding their regular business activities in the capital markets. In October 2019, the FHFA issued a Strategic Plan which outlines an end-state vision for FNMA and FHLMC to return to operating as fully-private companies within a competitive, liquid, efficient, and resilient housing finance system. The Strategic Plan articulates the commitment of FHFA that it will ensure that FNMA and FHLMC have the capital reserves, risk management capabilities, corporate governance, and regulatory oversight that are appropriate for their size, risk, and systematic importance outside of conservatorship. The FHFA advises that the attainment of the goal of ending the conservatorships is subject to achieving significant changes on multiple fronts, including changes to the housing finance market, changes in the scope of regulatory and supervisory authority accorded FHFA in a post-conservatorship environment, and changes in the operation of both FNMA and FHLMC, including particularly changes in business models which will facilitate the maintenance of capital levels that will prudently support business risk levels. While the FHFA has articulated the end-state vision which would permit FNMA and FHLMC to exit conservatorship, achievement of this goal, the projected timeline within which such goal can be accomplished, and the ultimate terms under which such conservatorships may end, is uncertain. The impact of the federal government’s on-going support of FNMA and FHLMC remains unclear and no assurance can be given that the actions taken will be successful in ensuring that FNMA and FHLMC will be able to meet their obligations with respect to the debt and mortgage-backed securities they issue. Further, there can be no assurance that U.S. Government intervention or legislation related to mortgage-backed securities will cause the risks associated with investment in such securities to decrease. The instability and reduced liquidity in financial markets over recent periods, particularly in credit and fixed income markets, may continue or get worse, and the U.S. Government may change or end its initiatives aimed at supporting mortgage-backed securities markets. Such events could adversely affect the performance and market value of certain of the Portfolios’ mortgage-related investments.

Except for GMCs, each of the mortgage-backed securities described above is characterized by monthly payments to the holder, reflecting the monthly payments made by the borrowers who received the underlying mortgage loans. The payments to the security holders (such as the Portfolios), like the payments on the underlying loans, represent both principal and interest. Although the underlying mortgage loans are for specified periods of time, such as 20 or 30 years, the borrowers can, and typically do, pay them off sooner. Thus, the security holders frequently receive prepayments of principal in addition to the principal that is part of the regular monthly payments. A portfolio manager will consider estimated prepayment rates in calculating the average weighted maturity of a Portfolio. A borrower is more likely to prepay a mortgage that bears a relatively high rate of interest. This means that in times of declining interest rates, higher yielding mortgage-backed securities held by a Portfolio might be converted to cash and that Portfolio will be forced to accept lower interest rates when that cash is used to purchase additional securities in the mortgage-backed securities sector or in other investment sectors. Additionally, prepayments during such periods will limit a Portfolio’s ability to participate in as large a market gain as may be experienced with a comparable security not subject to prepayment.

Commercial banks, savings and loan institutions, private mortgage insurance companies, mortgage bankers and other secondary market issuers also create pass-through pools of conventional residential mortgage loans. Such issuers may be the originators and/or servicers of the underlying mortgage loans as well as the guarantors of the mortgage related securities. Pools created by such non-governmental issuers generally offer a higher rate of interest than government and government-related pools because there are no direct or indirect government or agency guarantees of payments in the former pools. However, timely payment of interest and principal of these pools may be supported by various forms of insurance or guarantees, including individual loan, title, pool and hazard insurance and letters of credit, which may be issued by governmental entities or private insurers. Such insurance and guarantees and the creditworthiness of the issuers thereof will be considered in determining whether a mortgage-related security meets the Adviser’s or Sub-Adviser’s investment quality standards. There can be no assurance that the private insurers or guarantors can meet their obligations under the insurance policies or guarantee arrangements. The Portfolios may buy mortgage related securities without insurance or guarantees if, through an examination of the loan experience and practices of the originators/servicers and poolers, the securities meet the Adviser’s or Sub-Adviser’s quality standards. Although the market for such securities is becoming increasingly liquid, securities issued by certain private organizations may not be readily marketable.

Mortgage-backed securities that are issued or guaranteed by the U.S. Government, its agencies or instrumentalities, are not subject to a Portfolios’ industry concentration restrictions, set forth herein by virtue of the exclusion from the test available to all U.S. Government securities. In the case of privately issued mortgage related

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securities, the Portfolios take the position the mortgage related securities do not represent interests in any particular “industry” or group of industries. The assets underlying such securities may be represented by a portfolio of first lien residential mortgages (including both whole mortgage loans and mortgage participation interests) or portfolios of mortgage pass-through securities issued or guaranteed by GNMA, FNMA or FHLMC. Mortgage loans underlying a mortgage related security may in turn be insured or guaranteed by the FHA or the VA. In the case of private issue mortgage related securities whose underlying assets are either U.S. Government securities nor U.S. Government-insured mortgages, to the extent that real properties securing such assets may be located in the same geographical region, the security may be subject to a greater risk of default than other comparable securities in the event of adverse economic, political or business developments that may affect such region and, ultimately, the ability of residential homeowners to make payments of principal and interest on the underlying mortgages.

The residential mortgage market in the United States has experienced difficulties over the last few years that may adversely affect the performance and market value of certain of a Portfolio’s mortgage-related investments. Delinquencies and losses on residential mortgage loans (especially subprime and second-lien mortgage loans) generally have increased in recent years and may continue to increase, and a decline in or flattening of housing values (as has been experienced in recent years and may continue to be experienced in may housing markets) may exacerbate such delinquencies and losses. Borrowers with adjustable rate mortgage loans are more sensitive to changes in interest rates, which affect their monthly mortgage payments, and may be unable to secure replacement mortgages at comparably low interest rates. Also, a number of residential mortgage loan originators have experienced serious financial difficulties or bankruptcy in recent years. Owing largely to the foregoing, reduced investor demand for mortgage loans and mortgage-related securities and increased investor yield requirements have caused limited liquidity in the secondary market for mortgage-related securities in recent years, which can adversely affect the market value of mortgage-related securities. It is possible that such limited liquidity in such secondary markets could continue or worsen.

Collateralized Mortgage Obligations (CMOs). A CMO is a debt obligation of a legal entity that is collateralized by mortgages and divided into classes. Similar to a bond, interest and prepaid principal is paid, in most cases, on a monthly basis. CMOs may be collateralized by whole mortgage loans or private mortgage bonds, but are more typically collateralized by portfolios of mortgage pass-through securities guaranteed by GNMA, FHLMC, or FNMA, and their income streams.

CMOs are structured into multiple classes, often referred to as “tranches,” with each class bearing a different stated maturity and entitled to a different schedule for payments of principal and interest, including prepayments. Actual maturity and average life will depend upon the prepayment experience of the collateral. In the case of certain CMOs (known as “sequential pay” CMOs), payments of principal received from the pool of underlying mortgages, including prepayments, are applied to the classes of CMOs in the order of their respective final distribution dates. Thus, no payment of principal will be made to any class of sequential pay CMOs until all other classes having an earlier final distribution date have been paid in full.

In a typical CMO transaction, a corporation (“issuer”) issues multiple series (e.g., A, B, C, and Z) of CMO bonds (“Bonds”). Proceeds of the Bond offering are used to purchase mortgages or mortgage pass-through certificates (“Collateral”). The Collateral is pledged to a third party trustee as security for the Bonds. Principal and interest payments from the Collateral are used to pay principal on the Bonds in the order of Series A, B, C, and Z Bonds. The Series A, B, and C Bonds all bear current interest. Interest on the Series Z Bond is currently being paid off. When the Series A, B, and C Bond are paid in full, interest and principal on the Series Z Bond begins to be paid currently. CMOs may be less liquid and may exhibit greater price volatility than other types of mortgage- and asset-backed securities. As CMOs have evolved, some classes of CMO bonds have become more common. For example, the Portfolios may invest in parallel-pay and planned amortization class (“PAC”) CMOs and multi-class pass-through certificates. Parallel- pay CMOs and multi-class pass-through certificates are structured to provide payments of principal on each payment date to more than one class. These simultaneous payments are taken into account in calculating the stated maturity date or final distribution date of each class, which, as with other CMO and multi-class pass-through structures, must be retired by its stated maturity date or final distribution but may be retired earlier. PACs generally require payments of a specified amount of principal on each payment date. PACs are parallel-pay CMOs with the required principal amount on such securities having the highest priority after interest has been paid to all classes. Any CMO or multi-class pass-through structure that includes PAC securities must also have support tranches – known as support bonds, companion bonds or non-PAC bonds – which lend or absorb principal cash flows to allow the PAC securities to maintain their stated maturities and final distribution dates within a range of actual prepayment experience. These support tranches are

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subject to a higher level of maturity risk compared to other mortgage-backed securities, and usually provide a higher yield to compensate investors. If principal cash flows are received in amounts outside a pre-determined range such that the support bonds cannot lend or absorb sufficient cash flows to the PAC securities as intended, the PAC securities are subject to heightened maturity risk. Consistent with a Portfolio’s investment objectives and policies, the Portfolio may invest in various tranches of CMO bonds, including support bonds.

Commercial Mortgage-Backed Securities. Commercial mortgage-backed securities include securities that reflect an interest in, and are secured by, mortgage loans on commercial real property. The market for commercial mortgage-backed securities developed more recently and in terms of total outstanding principal amount of issues is relatively small compared to the market for residential single-family mortgage-backed securities. Many of the risks of investing in commercial mortgage-backed securities reflect the risks of investing in the real estate securing the underlying mortgage loans. These risks reflect the effects of local and other economic conditions on real estate markets, the ability of tenants to make loan payments, and the ability of a property to attract and retain tenants. Commercial mortgage-backed securities may be less liquid and exhibit greater price volatility than other types of mortgage- or asset-backed securities.

Mortgage Dollar Roll Transactions. A mortgage dollar roll is similar to a reverse repurchase agreement in certain respects. Dollar roll transactions consist of the sale by a Portfolio to a bank or broker/dealer (the “counterparty”) of mortgage-backed securities together with a commitment to purchase from the counterparty similar, but not identical, securities at a future date, at a similar price. Dollar roll transactions may also consist solely of a commitment to purchase mortgage-backed securities from the counterparty. The counterparty receives all principal and interest payments, including prepayments, made on the security while it is the holder. A Portfolio will receive compensation as consideration for entering into the commitment to purchase. The compensation can be in the form of a fee or a reduction in the repurchase price of the security. Typically, a Portfolio will receive a reduction in the repurchase price of the security and a cash settlement made at the renewal without physical delivery of securities. Dollar rolls may be renewed over a period of several months with a different purchase and repurchase price fixed and a cash settlement made at each renewal without physical delivery of securities. Moreover, the transaction may be preceded by a firm commitment agreement pursuant to which a Portfolio agrees to buy a security on a future date.

A dollar roll involves costs to a Portfolio. For example, while a Portfolio receives compensation as consideration for agreeing to repurchase the security, a Portfolio forgoes the right to receive all principal and interest payments while the counterparty holds the security. These payments to the counterparty may exceed the compensation received by a Portfolio, thereby effectively charging a Portfolio interest on its borrowings. Further, although a Portfolio can estimate the amount of expected principal prepayment over the term of the dollar roll, a variation in the actual amount of prepayment could increase or decrease the cost of a Portfolio’s borrowing.

The entry into dollar rolls involves potential risks of loss that are different from those related to the securities underlying the transactions. For example, if the counterparty becomes insolvent, a Portfolio’s right to purchase from the counterparty might be restricted. Additionally, the value of such securities may change adversely before a Portfolio is able to purchase them. Similarly, a Portfolio may be required to purchase securities in connection with a dollar roll at a higher price than may otherwise be available on the open market. Since, as noted above, the counterparty is required to deliver a similar, but not identical security to a Portfolio, the security that a Portfolio is required to buy under the dollar roll may be worth less than an identical security. Finally, there can be no assurance that a Portfolio’s use of the cash that it receives from a dollar roll will provide a return that exceeds borrowing costs.

To-Be-Announced Mortgage-Backed Securities. As with other delayed-delivery transactions, a seller agrees to issue a to-be announced mortgage-backed security (a “TBA”) at a future date. A TBA transaction arises when a mortgage-backed security, such as a GNMA pass-through security, is purchased or sold with specific pools that will constitute that GNMA pass-through security to be announced on a future settlement date. However, at the time of purchase, the seller does not specify the particular mortgage-backed securities to be delivered. Instead, a Portfolio agrees to accept any mortgage-backed security that meets specified terms. Thus, the Portfolio and the seller would agree upon the issuer, interest rate and terms of the underlying mortgages, but the seller would not identify the specific underlying mortgages until shortly before it issues the mortgage-backed security. TBAs increase interest rate risks because the underlying mortgages may be less favorable than anticipated by a Portfolio. For a further description of mortgage-backed securities, see “Pass-Through Securities” above.

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Credit Risk Transfer Mortgage-Backed Securities. Credit risk transfer mortgaged-backed securities are issued by FNMA (called Connecticut Avenue Securities) and FHLMC (called Structured Agency Credit Risk debt notes). Unlike the standard traditional mortgaged-backed securities issued by FNMA and FHLMC, which protect investors from the risk that home buyers will stop making timely payments on their mortgages (i.e., mortgage default or credit risk), the credit risk transfer mortgaged-backed securities are unguaranteed and unsecured by FNMA and FHLMC. As such, some or all of the mortgage default or credit risk associated with those securities are transferred to the investors. As a result, investors like the Portfolios that hold these securities could lose some or all of their investment in these securities if the underlying mortgages default.

Other Mortgage Related Securities. Other mortgage related securities include securities other than those described above that directly or indirectly represent a participation in, or are secured by and payable from, mortgage loans on real property, including mortgage dollar rolls, CMO residuals or stripped mortgage-backed securities (“SMBS”). Other mortgage related securities may be equity or debt securities issued by agencies or instrumentalities of the U.S. Government or by private originators of, or investors in, mortgage loans, including savings and loan association, homebuilders, mortgage banks, commercial banks, investment banks, partnerships, trusts and special purpose entities of the foregoing.

CMO Residuals. CMO residuals are mortgage securities issued by agencies or instrumentalities of the U.S. Government or by private originators of, or investors in, mortgage loans, including savings and loan associations, homebuilders, mortgage banks, commercial banks, investment banks and special purpose entities of the foregoing.

The cash flow generated by the mortgage assets underlying a series of CMOs is applied first to make required payment of principal and interest on the CMOs and second to pay the related administrative expenses and any management fee of the insurer. The residual in a CMO structure generally represents the interest in any excess cash flow remaining after making the foregoing payments. Each payment of such excess cash flow to a holder of a related CMO residual represents income and/or a return of capital. The amount of residual cash flow resulting from a CMO will depend on, among other things, the characteristics of the mortgage assets, the coupon rate of each class of CMO, prevailing interest rates, the amount of administrative expenses and the prepayment experience on the mortgage assets. In particular, the yield to maturity on CMO residuals is extremely sensitive to prepayments on the related underlying mortgage assets, in the same manner as an interest-only (“IO”) class of stripped mortgage-backed securities. See “Other Mortgage Related Securities” and “Stripped Mortgage-Backed Securities.” In addition, if a series of a CMO includes a class that bears interest at an adjustable rate, the yield to maturity on the related CMO residual will also be extremely sensitive to changes in the level of the index upon which interest rate adjustments are based. As described below with respect to stripped mortgage-backed securities, in certain circumstances a Portfolio may fail to recoup fully its initial investment in a CMO residual.

CMO residuals are generally purchased and sold by institutional investors through several investment banking firms acting as brokers or dealers. The CMO residual market has only very recently developed and CMO residuals currently may not have the liquidity of other more established securities trading in other markets. Transactions in CMO residuals are generally completed only after careful review of the characteristics of the securities in question. In addition, CMO residuals may, or pursuant to an exemption therefrom, may not have been registered under the Securities Act of 1933, as amended (the “1933 Act”). CMO residuals, whether or not registered under the 1933 Act, may be subject to certain restrictions on transferability, and may be deemed “illiquid” and subject to a Portfolio’s limitations on investment in illiquid securities.

Adjustable Rate Mortgage-Backed Securities. Adjustable rate mortgage-backed securities (“ARMBSs”) have interest rates that reset at periodic intervals. Acquiring ARMBSs permits a Portfolio to participate in increases in prevailing current interest rates through periodic adjustments in the coupons of mortgages underlying the pool on which ARMBSs are based. Such ARMBSs generally have higher current yield and lower price fluctuations than is the case with more traditional fixed income debt securities of comparable rating and maturity. In addition, when prepayments of principal are made on the underlying mortgages during periods of rising interest rates, a Portfolio can reinvest the proceeds of such prepayments at rates higher than those at which they were previously invested. Mortgages underlying most ARMBSs, however, have a limit on the allowable annual of lifetime increase that can be made in the interest rate that the mortgagor pays. Therefore, if current interest rates rise above such limits over the period of the limitations, a Portfolio holding an ARMBS does not benefit from further increases in interest rates. Moreover, when interest rates are in excess of coupon rates (i.e., rates being paid by mortgagors) of the mortgages, ARMBSs behave more like fixed

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income securities and less like adjustable rate securities and are subject to the risks associated with fixed income securities. In addition, during periods of rising interest rates, increases in the coupon rate mortgages generally lag current market interest rates slightly, thereby creating the potential for capital depreciation on such securities.

Stripped Mortgage-Backed Securities. SMBS are derivative multi-class mortgage securities. SMBS may be issued by agencies or instrumentalities of the U.S. Government, or by private originators of, or investors in, mortgage loans, including savings and loan associations, mortgage banks, commercial banks, investment banks and special purpose entities of the foregoing.

SMBS are usually structured with two classes that receive different proportions of the interest and principal distributions on a pool of mortgage assets. A common type of SMBS will have one class receiving some of the interest and most of the principal from the mortgage assets, while the other class will receive all of the interest (the “IO” class), while the other class will receive all of the principal (the “PO” class). The yield to maturity on an IO class is extremely sensitive to the rate of principal payments (including prepayments) on the related underlying mortgage assets, and a rapid rate of principal payments may have a material adverse effect on a Portfolio’s yield to maturity from these securities. If the underlying mortgage assets experience greater than anticipated prepayments of principal, a Portfolio may fail to recoup some or all of its initial investment in these securities even if the security is in one of the highest rating categories. The Long-Term U.S Government Bond Portfolio and the Multi-Sector Bond Portfolio may invest in residual interest bonds. The term “residual interest bonds” generally includes tender option bond trust residual interest certificates and instruments designed to receive residual payments or other excess cash flows from collateral pools once other interest holders and expenses have been paid. The Long-Term U.S. Government Bond Portfolio and the Multi-Sector Bond Portfolio have adopted a policy under which the respective Portfolio may invest no more than 5% of its total assets in any combination of mortgage related and other asset-backed IO, PO, inverse floater securities, or residual interest bonds.

Although SMBS are purchased and sold by institutional investors through several investment banking firms acting as brokers or dealers, these securities were only recently developed. As a result, established trading markets have not yet developed and, accordingly, these securities may be deemed “illiquid” and subject to a Portfolio’s limitations on investment in illiquid securities.

Collateralized Bond Obligations, Collateralized Loan Obligations and Other Collateralized Debt Obligations. The Portfolios may invest in each of collateralized bond obligations (“CBOs”), collateralized loan obligations (“CLOs”), other collateralized debt obligations (“CDOs”) and other similarly structured securities. CBOs, CLOs and other CDOs are types of asset-backed securities. A CBO is a trust which is often backed by a diversified pool of high risk, below investment grade fixed income securities. The collateral can be from many different types of fixed income securities such as high yield debt, residential privately issued mortgage-related securities, commercial privately issued mortgage-related securities, trust preferred securities and emerging market debt. A CLO is a trust typically collateralized by a pool of loans, which may include, among others, domestic and foreign senior secured loans, senior unsecured loans, and subordinate corporate loans, including loans that may be rated below investment grade or equivalent unrated loans. Other CDOs are trusts backed by other types of assets representing obligations of various parties. CBOs, CLOs and other CDOs may charge management fees and administrative expenses.

For CBOs, CLOs and other CDOs, the cash flows from the trust are split into two or more portions, called tranches, varying in risk and yield. The riskiest portion is the “equity” tranche which bears the bulk of defaults from the bonds or loans in the trust and serves to protect the other, more senior tranches from default in all but the most severe circumstances. Since they are partially protected from defaults, senior tranches from a CBO trust, CLO trust or trust of another CDO typically have higher ratings and lower yields than their underlying securities, and can be rated investment grade. Despite the protection from the equity tranche, CBO, CLO or other CDO tranches can experience substantial losses due to actual defaults, increased sensitivity to defaults due to collateral default and disappearance of protecting tranches, market anticipation of defaults, as well as aversion to CBO, CLO or other CDO securities as a class.

The risks of an investment in a CBO, CLO or other CDO depend largely on the type of the collateral securities and the class of the instrument in which a Portfolio invests. Normally, CBOs, CLOs and other CDOs are privately offered and sold, and thus, are not registered under the securities laws. As a result, investments in CBOs, CLOs and other CDOs may be characterized by the Portfolios as illiquid securities, however an active dealer market may exist for CBOs, CLOs and other CDOs allowing them to qualify for Rule 144A transactions. In addition to the normal risks associated with fixed income securities discussed elsewhere in this SAI and the Portfolios’ Prospectuses (e.g., interest

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rate risk and default risk), CBOs, CLOs and other CDOs carry additional risks including, but are not limited to: (i) the possibility that distributions from collateral securities will not be adequate to make interest or other payments; the quality of the collateral may decline in value or default; (iii) the risk that Portfolios may invest in CBOs, CLOs or other CDOs that are subordinate to other classes; and (iv) the complex structure of the security may not be fully understood at the time of investment and may produce disputes with the issuer or unexpected investment results.

Other Asset-Backed Securities. Similar to mortgage-backed securities, other types of asset-backed securities may be issued by agencies or instrumentalities of the U.S. government (including those whose securities are neither guaranteed nor insured by the U.S. government), foreign governments (or their agencies or instrumentalities), or non-governmental issuers. These securities include securities backed by pools of automobile loans, educational loans, home equity loans, and credit-card receivables. The underlying pools of assets are securitized through the use of trusts and special purpose entities. These securities may be subject to risks associated with changes in interest rates and prepayment of underlying obligations similar to the risks of investment in mortgage-backed securities described above.

Payment of interest on asset-backed securities and repayment of principal largely depends on the cash flows generated by the underlying assets backing the securities and, in certain cases, may be supported by letters of credit, surety bonds, or other credit enhancements. The amount of market risk associated with asset-backed securities depends on many factors, including the deal structure (i.e.; determinations as to the amount of underlying assets or other support needed to produce the cash flows necessary to service interest and make principal payments), the quality of the underlying assets, the level of credit support, if any, provided for the securities, and the credit quality of the credit-support provider, if any. Asset-backed securities involve risk of loss of principal if obligors of the underlying obligations default and the amounts defaulted exceed the securities’ credit support.

The value of an asset-backed security may be affected by the factors described above and other factors, such as the availability of information concerning the pool and its structure, the creditworthiness of the servicing agent for the pool, the originator of the underlying assets, or the entities providing the credit enhancement. The value of asset-backed securities also can depend on the ability of their servicers to service the underlying collateral and is, therefore, subject to risks associated with servicers’ performance. In some circumstances, a servicer’s or originator’s mishandling of documentation related to the underlying collateral (e.g.; failure to properly document a security interest in the underlying collateral) may affect the rights of the security holders in and to the underlying collateral. In addition, the insolvency of entities that generate receivables or that utilize the underlying assets may result in a decline in the value of the underlying assets as well as costs and delays.

Certain types of asset-backed securities present additional risks that are not presented by mortgage-backed securities. In particular, certain types of asset-backed securities may not have the benefit of a security interest in the related assets. For example, many securities backed by credit-card receivables are unsecured. In addition, a Portfolio may invest in securities backed by unsecured commercial or industrial loans or unsecured corporate or sovereign debt (see “Collateralized Bond Obligations, Collateralized Loan Obligations and Other Collateralized Debt Obligations” (“CDOs”) above). Even when security interests are present, the ability of an issuer of certain types of asset-backed securities to enforce those interests may be more limited than that of an issuer of mortgage-backed securities. For instance, automobile receivables generally are secured, but by automobiles rather than by real property. Most issuers of automobile receivables permit loan servicers to retain possession of the underlying assets. In addition, because of the large number of underlying vehicles involved in a typical issue of asset-backed securities and technical requirements under state law, the trustee for the holders of the automobile receivables may not have a proper security interest in all of the automobiles. Therefore, recoveries on repossessed automobiles may not be available to support payments on these securities.

In addition, certain types of asset-backed securities may experience losses on the underlying assets as a result of certain rights provided to consumer debtors under federal and state law. In the case of certain consumer debt, such as credit-card debt, debtors are entitled to the protection of a number of state and federal consumer credit laws, many of which give such debtors the right to set off certain amounts owned on their credit-cards (or other debt), thereby reducing their balances due. For instance, a debtor may be able to offset certain damages for which a court has determined that the creditor is liable to the debtor against amounts owed to the creditor by the debtor on his or her credit-card.

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Municipal Bonds

A Portfolio may invest in municipal bonds of any state, territory or possession of the U.S., including the District of Columbia. The Portfolio may also invest in municipal bonds of any political subdivision, agency or instrumentality (e.g., counties, cities, towns, villages, districts, authorities) of the U.S. or its possessions. Municipal bonds are debt instruments issued by or for a state or local government to support its general financial needs or to pay for special projects such as airports, bridges, highways, public transit, schools, hospitals, housing and water and sewer works. Interest payments received by holders of these securities are generally exempt from federal income tax. Municipal bonds may also be issued to refinance public debt.

Municipal bonds are mainly divided between “general obligation” and “revenue” bonds. General obligation bonds are backed by the full faith and credit of governmental issuers with the power to tax. They are repaid from the issuer’s general revenues. Payment, however, may be dependent upon legislative approval and may be subject to limitations on the issuer’s taxing power. Enforcement of payments due under general obligation bonds varies according to the law applicable to the issuer. In contrast, revenue bonds are supported only by the revenues generated by the project or facility.

A Portfolio may also invest in industrial development bonds. Such bonds are usually revenue bonds issued to pay for facilities with a public purpose operated by private corporations. The credit quality of industrial development bonds is usually directly related to the credit standing of the owner or user of the facilities. In order for interest payments received by holders of industrial development bonds to be exempt from federal income tax, they must constitute a qualified bond, as defined in section 141 of the Code. However, the interest paid on an industrial development bond may be subject to the federal alternative minimum tax.

The yields on municipal bonds depend on such factors as market conditions, the financial condition of the issuer and the issue’s size, maturity date and rating. Municipal bonds are rated by Standard & Poor’s, Moody’s and Fitch Investor Services, Inc. Such ratings, however, are opinions, not absolute standards of quality. Municipal bonds with the same maturity, interest rates and rating may have different yields, while municipal bonds with the same maturity and interest rate, but different ratings, may have the same yield. Once purchased by the Portfolio, a municipal bond may cease to be rated or receive a new rating below the minimum required for purchase by the Portfolio. Neither event would require the Portfolio to sell the bond, but the Portfolio’s investment adviser would consider such events in determining whether the Portfolio should continue to hold it.

The ability of a Portfolio to achieve its investment objective depends upon the continuing ability of the issuers of municipal bonds to pay interest and principal when due. Municipal bonds are subject to the provisions of bankruptcy, insolvency and other laws affecting the rights and remedies of creditors. Such laws extend the time for payment of principal and/or interest, and may otherwise restrict the Portfolio’s ability to enforce its rights in the event of default. Since there is generally less information available on the financial condition of municipal bond issuers compared to other domestic issuers of securities, the Portfolio’s investment adviser may lack sufficient knowledge of an issue’s weaknesses. Other influences, such as litigation, may also materially affect the ability of an issuer to pay principal and interest when due. In addition, the market for municipal bonds is often thin and can be temporarily affected by large purchases and sales, including those by the Portfolio.

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not continue to receive the federal subsidy, thereby impairing the issuer’s ability to make payments on the bond. Some Build America Bonds have been issued with provisions that allow state and local governments to “call” the bonds back if the federal government stops paying a subsidy on the interest.

Proposals have been introduced in Congress to restrict or eliminate the federal income tax exemption for interest on municipal securities, and similar proposals may be introduced in the future. If such a proposal were enacted, the availability of municipal securities for investment by the Portfolios and the value of a Portfolio could be affected. Also, changes to tax laws broadly lowering tax rates, including lower tax rates on dividends and capital gains, could have a negative impact on the desirability of owning municipal securities.

Bond Insurer Risk. The Portfolios may purchase municipal securities that are insured under policies issued by certain insurance companies. Insured municipal securities typically receive a higher credit rating which means that the issuer of the securities pays a lower interest rate. In purchasing such insured securities, the Adviser or Sub-Adviser gives consideration both to the insurer and to the credit quality of the underlying issuer. The insurance reduces the credit risk for a particular municipal security by supplementing the creditworthiness of the underlying bond and provides additional security for payment of the principal and interest of a municipal security. To the extent a Portfolio holds insured municipal securities, a change in the credit rating of any one or more of the municipal bond insurers that insure securities in the Portfolio’s portfolio may affect the value of the securities they insure, the Portfolio’s share price and Portfolio performance. A Portfolio might also be adversely impacted by the inability of an insurer to meet its insurance obligations. A downgrade of municipal bond insurers rated above investment grade would substantially limit the availability of insurance sought by municipal bond issuers, thereby reducing the supply of insured municipal securities. Certain of the insurance companies that provide insurance for municipal securities may also provide insurance for other types of securities, including higher risk securities such as subprime mortgages. If the value of such other securities declines and/or the issuer defaults, such events increase a bond insurer’s risk of having to make payments to holders of such securities. Because of this risk, the ratings of some insurance companies have been downgraded, others may be downgraded in the future, and it is possible that an insurance company may become insolvent. If an insurance company’s rating is downgraded or the company becomes insolvent, the prices of municipal securities insured by the insurance company may decline.

Private Investments in Public Equity (PIPEs)

Certain Portfolios may also make private investments in public equity, commonly referred to as “PIPEs.” A PIPE investment involves the sale of equity securities, or securities convertible into equity securities, in a private placement transaction by a company that already has outstanding, publicly traded equity securities of the same class. Shares acquired in PIPEs are commonly sold at a discount to the current market value per share of the company’s publicly traded securities.

Shares acquired in PIPEs generally are not registered with the SEC until after a certain period of time from the date the private sale is completed, which may be months and perhaps longer. Until the public registration process is completed, securities acquired in PIPEs are restricted and, like investments in other types of restricted securities, may be illiquid. Any number of factors may prevent or delay a proposed registration. Alternatively, it may be possible for securities acquired in PIPEs to be resold in transactions exempt from registration in accordance with rules under the 1933 Act. There is no guarantee, however, that an active trading market for the securities will exist at the time of disposition of the securities, and the lack of such a market could hurt the market value of the Portfolio’s investments. Even if the Portfolio is able to have securities acquired in PIPEs registered or sell such securities through an exempt transaction, the Portfolio may not be able to sell all the securities on short notice, and the sale of the securities could lower the market price of the securities.

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Because PIPEs involve private placement transactions, see also “Private Placement Transactions and Illiquid Assets” below.

Private Placement Transactions and Illiquid Assets

Each Portfolio may invest up to 15% (except the Government Money Market Portfolio, which may invest up to 5%) of its net assets in securities deemed to be illiquid, which may include private placement transactions. For the purpose of determining each Portfolio’s net asset value, these assets will be valued at their fair value as determined in good faith by the board of directors of the Fund. If a Portfolio should have occasion to sell an investment in restricted securities at a time when the market for such investments is unfavorable, a considerable period may elapse between the time when the decision to sell it is made and the time when the Portfolio will be able to sell the investment, with a possible adverse effect upon the amount to be realized from the sale.

Notwithstanding these limitations a Portfolio may purchase securities which, though not registered under the 1933 Act, are eligible for purchase and sale pursuant to Rule 144A under the 1933 Act. Rule 144A permits unregistered securities to be traded among qualified institutional investors, including the Portfolios. Investing in Rule 144A securities could have the effect of increasing the level of a Portfolio’s illiquidity to the extent that qualified institutional buyers are unavailable or uninterested in purchasing such securities from the Portfolio. Rule 144A securities that are determined to be liquid are not subject to the limitations on illiquid assets. A Portfolio’s investment adviser or sub-adviser determines and monitors the liquidity status of each Rule 144A security in which a Portfolio invests, subject to supervision and oversight by the board of directors of the Fund. The investment adviser or sub-adviser takes into account all of the factors which may have a material bearing on the ability of the Portfolio to dispose of the security in seven days or less, at a price reasonably consistent with the value used to determine the Portfolio’s net asset value per share, including the following factors: (1) the frequency and volume of trades, (2) the number and sources of price quotes, (3) the number, and identity, of dealers willing to purchase or sell the issue, and the number and identity of other potential purchasers, (4) any dealer undertakings to make a market in the security, (5) the nature of the security, and (6) the nature of the market in which the issue is traded, including the time typically required to make trades, the methods of soliciting offers and the mechanics of transfer. With respect to sub-advised Portfolios, the Adviser takes into account the views of the Sub-Adviser with respect to the foregoing factors.

Real Estate Investment Trusts

The Portfolios may invest in real estate investment trusts (“REITs”), which are pooled investment vehicles that invest primarily in income-producing real estate or real estate related loans or interests. Like regulated investment companies such as the Portfolios, REITs are not taxed on income distributed to shareholders provided they comply with several requirements of the Code. When a Portfolio invests in a REIT, it will indirectly bear its proportionate share of any expenses paid by the REIT in addition to the expenses of the Portfolio. Investing in REITs involves certain risks. A REIT may be affected by changes in the value of the underlying property owned by such REIT or by the quality of any credit extended by the REIT. REITs are dependent on management skills, are not diversified (except to the extent the Code requires), and are subject to the risks of financing projects. REITs are subject to heavy cash flow dependency, default by borrowers, self-liquidation, the possibilities of failing to satisfy the specific requirements under the Code that allow REITs to pass through income to shareholders without paying tax at the entity level, and failing to maintain their exemptions from the 1940 Act. REITs are subject to the types of risks associated with investing in the real estate industry, which may include risks related to extended vacancies of properties, casualty or condemnation losses, property taxes, and governmental actions, such as changes to tax laws, zoning regulations or environmental regulations. The Portfolios are not eligible for a deduction from dividends received from REITs that is available to individuals who invest directly in REITs. REITs are also subject to interest rate risks.

Repurchase Agreements

Each Portfolio may invest in repurchase agreements subject to the operating policies discussed under “Investment Restrictions.” A repurchase agreement customarily obligates the seller at the time it sells securities to the Portfolio to repurchase the securities at a mutually agreed upon time and price. The total amount received on repurchase would be calculated to exceed the price paid by the Portfolio, reflecting an agreed upon market rate of interest for the period from the time of the repurchase agreement to the settlement date, and would not necessarily be related to the interest rate on the underlying securities. The differences between the total amounts to be received upon repurchase of the securities and the price which was paid by the Portfolio upon their acquisition is accrued as interest and is included

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in the Portfolio’s net income declared as dividends. While it is not possible to eliminate all risks from these transactions (particularly the possibility of a decline in the market value of the underlying securities, as well as delays and costs to a Portfolio if the other party to the repurchase agreement defaults), it is the policy of each Portfolio to limit repurchase transactions to primary dealers and banks whose creditworthiness has been reviewed and found satisfactory by the Adviser or Sub-Adviser. Securities subject to repurchase agreements shall be limited to obligations of or guaranteed by the U.S. Government or its agencies or instrumentalities or by the Government of Canada or of a Province of Canada or any instrumentality or political subdivision thereof, certificates of deposit of banks or commercial paper which meet the criteria for other commercial paper in which the Portfolio may invest. Commercial paper is a short-term promissory note issued by a corporation primarily to finance short-term credit needs. Securities subject to repurchase agreements in which the Government Money Market Portfolio invests are limited to cash, and obligations of or guaranteed by the U.S. Government, its agencies or instrumentalities to the extent necessary to operate as a “government money market fund” as defined in Rule 2a-7 under the 1940 Act. A Portfolio will not invest more than 10% of its total assets in repurchase agreements which have maturities of more than seven days and will not invest in repurchase agreements with maturities of over 30 days. Under no circumstances will a Portfolio enter into a repurchase agreement with Northwestern Mutual.

Each Portfolio has the right to sell securities subject to repurchase agreements but would be required to deliver identical securities upon maturity of the repurchase agreement unless the seller fails to pay the repurchase price. It is each Portfolio’s intention not to sell securities subject to repurchase agreements prior to the agreement’s maturity. To the extent that the proceeds from any sale upon a default in the obligation to repurchase were less than the repurchase price, the Portfolio would suffer a loss. The Portfolio might also incur disposition costs in connection with liquidating its collateral and, if bankruptcy proceedings are commenced with respect to the seller, realization upon the collateral by the Portfolio may be delayed or limited and a loss may be incurred if the collateral securing the repurchase agreement declines in value during the bankruptcy proceedings. To minimize the possibility of losses due to the default or bankruptcy of the seller, prior to entering into any repurchase agreement, the Adviser or Sub-Adviser, as applicable, shall adopt standards of creditworthiness for the broker-dealers with which the Portfolio intends to enter into repurchase agreements, and will monitor the creditworthiness of such broker-dealers.

Reverse Repurchase Agreements

Each of the Portfolios may enter into reverse repurchase agreements with banks and broker-dealers. Such agreements involve the sale of money market securities held by a Portfolio pursuant to an agreement to repurchase the securities at an agreed upon price, date and interest payment, which may be considered a form of borrowing. The Portfolio will use the proceeds of reverse repurchase agreements to purchase other money market securities which either mature, or can be sold under an agreement to resell, at or prior to the expiration of the reverse repurchase agreement. A Portfolio will utilize reverse repurchase agreements when the interest income to be earned from the investment of proceeds from the transaction is greater than the interest expense of the reverse repurchase transaction. The Fund has elected to treat reverse repurchasing agreements and similar financing transactions as derivatives transactions in accordance with the Series Fund Rule 18f-4 derivatives risk management program, as discussed in the “Rule 18f-4 Program Concerning Derivatives Usage” section of this SAI, above. Under no circumstances will a Portfolio enter into a reverse repurchase agreement with Northwestern Mutual.

Reverse Convertible Notes

The Portfolios may invest in reverse convertible notes. A reverse convertible note is a short-to-intermediate term structured product, generally issued by a financial institution, in which performance is based on that of an underlying security, commodity or index. Generally, at maturity the note matures at par unless the price of the underlying instrument has fallen below a certain “break point,” in which case the note holder receives a proportionate amount of units or shares of the underlying instrument.

In addition to the risks relating to fixed income securities generally, reverse convertible notes are subject to similar risks as those of the equity securities to which they are linked, such as the risk that the price of the related security may fall, causing the value of the note to drop. Further, reverse convertible notes do not have the same appreciation potential as the underlying equity securities (usually common stocks) to which they are linked because, at maturity, the value of the note will not appreciate above the initial principal amount plus the stated coupon rate. Because a Portfolio may deliver the underlying security prior to note maturity, a Portfolio investing in reverse convertible notes

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has the potential for principal loss as reverse convertible notes are not principal-protected. Reverse convertible notes are not exchange traded, and the secondary market may be illiquid, making them illiquid and increasing the Portfolio’s reliance on the issuer’s ability to meet its obligations to make payments of principal and interest.

Securities Lending

Each Portfolio may lend its portfolio securities to broker-dealers or other qualified institutions up to the limit permitted by the 1940 Act and the rules and regulations thereunder (currently, up to 33 1/3% of a Portfolio’s total assets). The loans must be continuously secured by collateral at least equal at all times to the value of the securities lent, marked to market on a daily basis. The collateral received will consist of money market instruments and other liquid assets. To the extent a loan is collateralized by cash, such collateral is invested by the Portfolio in short-term investments to earn interest in accordance with the Portfolio’s investment policies. While the securities are being lent, the Portfolio will continue to receive the equivalent of the interest or dividends paid by the issuer of the securities, as well as interest on the investment of the collateral or a fee from the borrower. The Portfolios have the right to call each loan and obtain the securities within the normal settlement period for the securities. The risks in lending portfolio securities consist of possible delay in receiving additional collateral or in the recovery of the securities or possible loss of rights in the collateral if the borrower defaults. Securities loans will be made only to borrowers found by the Adviser to be creditworthy and will not be made unless, in the judgment of the Adviser, the consideration to be earned from such loans would justify the risk.

Securities on Restricted Lists

A Portfolio may be precluded from purchasing or selling securities of issuers that from time to time are placed on the restricted lists of the Adviser (or Sub-Adviser) or certain of its corporate affiliates. An issuer may be placed on one or more of these restricted lists, for example, (i) when certain employees of an adviser or its corporate affiliates come into possession of what may be material, nonpublic information or (ii) as necessary to ensure compliance with other securities laws or regulations. The presence of an issuer or security on the restricted list of the Adviser or Sub-Adviser or certain of its corporate affiliates could impair the Portfolio’s ability to sell and buy securities.

Short Sales

The Portfolios may engage in short sales. A short sale is a transaction in which a Portfolio sells a security it does not own in anticipation that the market price of that security will decline. In a short sale transaction, a Portfolio sells a security it does not own to a purchaser at a specified price. To complete a short sale, a Portfolio must: (1) borrow the security to deliver it to the purchaser and (2) buy that same security in the market to return it to the lender.

A Portfolio may engage in short sales when its portfolio manager anticipates that the security’s market purchase price will be less than its borrowing price.

If the value of a security sold short increases between the time the short sale is made and the Portfolio replaces the borrowed security, the Portfolio will incur a loss; conversely, if the price declines, the Portfolio will experience a gain. If a Portfolio effects a short sale of securities at a time when it has an unrealized gain on the securities, it may be required to recognize that gain as if it had actually sold the securities (as a “constructive sale”) on the date it effects the short sale. However, such constructive sale treatment may not apply if the Portfolio closes out the short sale with securities other than the appreciated securities held at the time of the short sale and if certain other conditions are satisfied. Uncertainty regarding the tax consequences of effecting short sales may limit the extent to which the Portfolio may affect short sales. There are certain transaction costs associated with short selling. Any gain will be decreased, and any loss increased, by such transaction costs. In addition, a Portfolio may incur interest and/or dividend expense to the extent it engages in short sales.

A Portfolio may sell securities short only on a fully collateralized basis, as permitted by SEC interpretations. Until the Portfolio replaces the borrowed security, the Portfolio will earmark liquid assets in the amount of its obligation in the short sale transaction to the extent the obligation is not otherwise covered through ownership of the underlying security. A short sale is “against the box” to the extent that the Portfolio contemporaneously owns, or has the right to obtain at no added cost, securities identical to those sold short. In a short sale against the box, if the value of the securities sold short increases prior to the scheduled delivery date, the Portfolio will lose the opportunity to participate in the gain.

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Special Purpose Acquisition Companies

The Portfolios may invest in stock, warrants or other securities of special purpose acquisition companies (“SPACs”) or similar special purpose entities that pool funds to seek potential acquisition opportunities. A SPAC generally maintains its assets (less a portion retained to cover expenses) in a trust account until an acquisition that meets the requirements for the SPAC is completed. If an acquisition is not completed within a pre-established period of time, the invested funds are returned to the entity’s shareholders. Because SPACs and similar entities are in essence blank check companies without an operating history or ongoing business other than seeking acquisitions, the value of their securities is particularly dependent on the ability of the entity’s management to identify and complete a profitable acquisition. Some SPACs may pursue acquisitions only within certain industries or regions, which may increase the volatility of their prices. In addition, these securities, which are typically traded in the over-the-counter market, may be considered illiquid and/or be subject to restrictions on resale.

Standby Commitment Agreements

The Portfolios may acquire standby commitments. Under a standby commitment, the liquidity provider would agree to purchase at the Portfolio’s option specified securities at their amortized cost value to the Portfolio plus accrued interest, if any. (Standby commitments acquired by the Portfolio may also be referred to as a “demand feature”.) Standby commitments for securities may be exercisable by the Portfolio at any time before the maturity of the underlying securities and may be sold, transferred, or assigned only with the instruments involved. The Portfolio’s right to exercise standby commitments will be unconditional and unqualified. Standby commitments are provided in the form of letters of credit (LOCs), standby purchase agreements (SBPAs) or similar commitments. The standby commitment is typically provided by a bank or the issuer of a security.

Risks associated with standby commitments include potential liquidity and credit risk in the event and to the extent the credit worthiness of the issuer of the standby commitment deteriorates and the provider is not able to honor its obligation. The Portfolio will enter into standby commitments only with providers that, in the Sub-adviser’s opinion, present minimal credit risks. The Portfolio’s ability to exercise a standby commitment will depend on the ability of the provider to meet its obligations under the standby commitment. The Sub-adviser continuously monitors providers of standby commitments on its approved lists.

U.S. Government and Government Agency Obligations

U.S. Government Obligations. U.S. Government obligations are debt securities issued or guaranteed as to principal or interest by the U.S. Treasury. These securities include treasury bills, notes and bonds.

GNMA Obligations. GNMA obligations are mortgage-backed securities guaranteed by the Government National Mortgage Association which guarantee is supported by the full faith and credit of the U.S. government.

U.S. Agency Obligations. U.S. Government agency obligations are debt securities issued or guaranteed as to principal or interest by an agency or instrumentality of the U.S. Government pursuant to authority granted by Congress. U.S. Government agency obligations include, but are not limited to:

Student Loan Marketing Association,

Federal Home Loan Banks,

Federal Intermediate Credit Banks, and

the Federal National Mortgage Association.

U. S. Instrumentality Obligations. U.S. instrumentality obligations include, but are not limited to, the Export-Import Bank and Farmers Home Administration.

Some obligations issued or guaranteed by U.S. Government agencies or instrumentalities are supported by the right of the issuer to borrow from the U.S. Treasury or the Federal Reserve Banks, such as those issued by Federal Intermediate Credit Banks. Others, such as those issued by the FNMA, the Federal Home Loan Banks (“FHLBs”) and the FHLMC are supported by discretionary authority of the U.S. Government to purchase certain obligations of the agency or instrumentality. In addition, other obligations such as those issued by the Student Loan Marketing Association, are supported only by the credit of the agency or instrumentality. There are also separately traded interest components of securities issued or guaranteed by the U.S. Treasury.

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No assurance can be given that the U.S. Government will provide financial support for the obligations of such U.S. Government sponsored agencies or instrumentalities in the fixture, since it is not obligated to do so by law. In this document, “U.S. Government securities” refers not only to securities issued or guaranteed as to principal or interest by the U.S. Treasury but also to securities that are backed only by their own credit and not the full faith and credit of the U.S. Government.

Warrants

Each of the Portfolios may invest in warrants. Warrants are instruments which entitle the holder to buy an equity security at a specific price for a specific period of time. The equity security underlying a warrant is outstanding at the time the warrant is issued or is issued together with the warrant. Changes in the value of a warrant do not necessarily correspond to changes in the value of its underlying security. The price of a warrant may be more volatile than the price of its underlying security, and a warrant may offer greater potential for capital appreciation as well as capital loss. Warrants do not entitle a holder to dividends or voting rights with respect to the underlying security and do not represent any rights in the assets of the issuing company. A warrant ceases to have value if it is not exercised prior to its expiration date. These factors can make warrants more speculative than other types of investments.

Zero Coupon, Step Coupon And Pay-In-Kind Securities

Zero coupon bonds are issued and traded at a discount from their face value. They do not entitle the holder to any periodic payment of interest prior to maturity. Step coupon bonds trade at a discount from their face value and pay coupon interest. The coupon rate is low for an initial period and then increases to a higher coupon rate thereafter. The discount from the face amount or par value depends on the time remaining until cash payments begin, prevailing interest rates, liquidity of the security and the perceived credit quality of the issuer. Pay-in-kind bonds normally give the issuer an option to pay cash at a coupon payment date or give the holder of the security a similar bond with the same coupon rate and a face value equal to the amount of the coupon payment that would have been made. For the purposes of any Portfolio’s restriction on investing in income producing securities, income producing securities include securities that make periodic interest payments as well as those that make interest payments on a deferred basis or pay interest only at maturity (e.g., Treasury bills or zero coupon bonds).

Current federal income tax law requires holders of zero coupon and step coupon securities to report the portion of the original issue discount on such securities that accrue during a given year as interest income, even though the holders receive no cash payments of interest during the year. In order to qualify as a “regulated investment company” under the Code, a Portfolio must distribute most of its investment company taxable income, which includes the original issue discount accrued on zero coupon or step coupon bonds. Because a Portfolio will not receive cash payments on a current basis in respect of accrued original issue discount on zero coupon bonds or step coupon bonds during the period before interest payments begin, in some years that Portfolio may have to distribute cash obtained from other sources in order to satisfy the distribution requirements under the Code. A Portfolio might obtain such cash from selling other portfolio holdings which might cause the Portfolio to incur capital gains or losses on the sale. Additionally, these actions are likely to reduce the assets to which Portfolio expenses could be allocated and to reduce the rate of return for the Portfolio. In some circumstances, such sales might be necessary in order to satisfy cash distribution requirements even though investment considerations might otherwise make it undesirable for a Portfolio to sell the securities at the time.

Although reinvestment risk of income received during the life of these types of bond is reduced or eliminated, they still involve interest rate and credit risk. Also, generally the market prices of zero coupon, step coupon and pay-in-kind securities are more volatile than the prices of securities that pay interest periodically and in cash, and are likely to respond to changes in interest rates to a greater degree than other types of debt securities having similar maturities and credit quality.

SPECIAL RISK RELATED TO CYBER SECURITY

The Fund and its service providers have administrative and technical safeguards in place with respect to information security. Nevertheless, the Fund and its service providers are potentially susceptible to operational and information security risks resulting from a cyber-attack as the Fund is highly dependent upon the effective operation of its computer systems and those of its business partners. These risks include, among other things, the theft, misuse, corruption and destruction of data maintained online or digitally, denial of service on websites and other operational disruption and unauthorized release of confidential customer information. Cyber-attacks affecting Northwestern

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Mutual, the Fund, the Adviser, Sub-Advisers, custodians, intermediaries and other affiliated or third-party service providers may adversely affect the Fund and contract owners. For instance, cyber-attacks may interfere with the processing of Fund transactions, including the processing of orders, impact the Fund’s ability to calculate net asset values, cause the release and possible destruction of confidential customer or business information, impede trading, subject the Fund and/or its service providers and intermediaries to regulatory fines and financial losses and/or cause reputational damage. Cyber security risks may also impact the issuers of securities in which the Fund invests, which may cause the Fund’s investments to lose value. The Fund may also incur additional costs for cyber security risk management in the future. There can be no assurance that the Fund or its service providers will avoid losses affecting the Fund due to cyber-attacks or information security breaches in the future.

PORTFOLIO TURNOVER

Portfolio turnover may vary from year to year or within a year depending upon economic, market and business conditions. The annual portfolio turnover rates of the Portfolios cannot be accurately predicted. Factors that might cause portfolio turnover rates to vary include, for example, market and economic factors, and portfolio re-positioning in response to a shift in investment strategy or outlook. The portfolio turnover rate for the Index 600 Stock Portfolio is generally anticipated to be higher than that of its underlying benchmark index, the S&P SmallCap 600® Index, due to the Portfolio’s use of exchange-traded funds in an attempt to achieve full replication.

For periods ending 2023 and 2024, the portfolio turnover rates for the Portfolios were:

Portfolio Turnover Rate	2024	2023
Growth Stock Portfolio	7 %	9 %
Focused Appreciation Portfolio	9 %	7 %
Large Cap Core Stock Portfolio	74 %	63 %
Large Cap Blend Portfolio	50 %	119 %
Index 500 Stock Portfolio	2 %	2 %
Large Company Value Portfolio	40 %	36 %
Domestic Equity Portfolio	31 %	23 %
Equity Income Portfolio	24 %	18 %
Mid Cap Growth Stock Portfolio	127 %	39 %
Index 400 Stock Portfolio	16 %	19 %
Mid Cap Value Portfolio	57 %	50 %
Small Cap Growth Stock Portfolio	68 %	64 %
Index 600 Stock Portfolio	19 %	25 %
Small Cap Value Portfolio	32 %	29 %
International Growth Portfolio	23 %	21 %
Research International Core Portfolio	21 %	15 %
International Equity Portfolio	19 %	14 %
Emerging Markets Equity Portfolio	38 %	24 %
Short-Term Bond Portfolio	116 %§	56 %§
Select Bond Portfolio	234 %§	248 %§
Long-Term U.S. Government Bond Portfolio	44 %§	32 %§
Inflation Managed Portfolio (formerly Inflation Protection Portfolio)	50 %	41 %§
High Yield Bond Portfolio	26 %	17 %
Multi-Sector Bond Portfolio	34 %§	26 %§
Active/Passive Balanced Portfolio (formerly Balanced Portfolio)	29 %	9 %
Active/Passive Moderate Portfolio (formerly Asset Alloction Portfolio)	26 %	11 %

Portfolio Turnover Rate excludes the impact of TBA transactions.

The annual portfolio turnover rate of each Portfolio is the lesser of purchases or sales of the Portfolio’s securities for the year stated as a percentage of the monthly average value of the Portfolio’s securities. Short-term debt securities are excluded in the calculation of portfolio turnover rates. U.S. Government securities are included in the calculation of portfolio turnover rates. For the Short-Term Bond, Select Bond, Long-Term US Government, Inflation Managed and Multi-Sector Bond Portfolios, the portfolio turnover rate excludes the impact of mortgage dollar roll transactions. For the Long-Term U.S. Government Bond Portfolio, the portfolio turnover rate excludes the impact of financing transactions.

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As noted in the Fund’s Prospectus under “The Investment Adviser and Sub-Advisers – Manager of Managers Structure,” the Fund employs a “manager of managers” structure pursuant to which the Adviser, with the approval of the board of directors of the Fund, may hire, terminate or replace Sub-Advisers without shareholder approval. When a Sub-Adviser is hired or replaced for a Portfolio, the Portfolio’s turnover rate for the year in which the change occurs may increase from its normal rate due to the Portfolio’s transition to the new Sub-Adviser. After the transition is complete, the Portfolio’s turnover rate may be higher or lower than its rate in previous years due to different investment strategies employed by the new Sub-Adviser or other factors relating to the change. Effective July 31, 2023, a new Sub-Adviser was appointed to manage the Large Cap Blend Portfolio and as a result it was anticipated that an elevated turnover rate would occur in connection with the transition to the new Sub-Adviser. Effective October 28, 2024, a new Sub-Adviser was appointed to manage the Mid Cap Growth Stock Portfolio and as a result it was anticipated that an elevated turnover rate would occur in connection with the transition to the new Sub-Adviser. In addition to the foregoing, the Short-Term Bond Portfolio experienced increased turnover during the period resulting from efforts by the Portfolio to manage its duration positioning as certain securities reached their maturities. The Sub-Advisers for each of the aforementioned Portfolios anticipate that the portfolio turnover for each of the respective Portfolios will normalize.

MANAGEMENT OF THE FUND

General

Under state law and the Fund’s By-laws, the Fund’s Board of Directors (the “Board”) is responsible for overseeing the operations of the Fund. The business, affairs and property of the Fund are managed under the direction of the Board. The Board is responsible for setting and overseeing the investment objectives and policies of the Fund, but delegates daily management of the Fund to the Adviser, the Sub-Advisers where applicable and the officers of the Fund. The Board is currently composed of seven directors. Information about the directors and officers of the Fund, together with a brief description of their principal occupations during the past five years, the year they were first elected or appointed to their position with the Fund and certain other information is set forth in Appendix B.

Board Leadership Structure

In addition to the Board’s general duties, the 1940 Act (which governs the operations of mutual funds such as the Fund), requires that the Board perform a “watchdog” function and imposes substantial responsibilities on the Board to ensure that the interests of shareholders are adequately protected. The Board has chosen a leadership structure which it believes provides an appropriate means for it to fulfill its management oversight and fiduciary functions and responsibilities, given the characteristics and circumstances of the Fund.

The Board has appointed a Chair who presides at all meetings of the Board. The Chair is an “interested person” as defined in Section 2 (a)(19) of the 1940 Act. That is, the Chair is also an officer of Northwestern Mutual, the parent of the investment adviser to the Fund. The Board has determined that an “interested person” as Chair, with their knowledge of the investment management business in general and of insurance products and the operations of Northwestern Mutual and their significant experience in financial and risk management, is well suited to assist the Board in fulfilling its responsibilities. The Board also believes, and has experienced, that having an “interested person” as Chair does not diminish a board culture conducive to decisions favoring the long-term interests of Fund shareholders, particularly in light of the other characteristics of the Board related to its composition and scope of its authority discussed below.

The President of the Fund, and not the Chair of the Board, is the chief executive officer of the Fund. As chief executive officer, the President has general charge of the business affairs and property of the Fund and general supervision over its other officers. The Board believes this division of responsibilities furthers the independent oversight of management.

Six of the seven directors are not “interested persons” as defined in the 1940 Act (“Independent Directors”). Constituting over 80% of the Board, the Independent Directors control the actions of the Board (including the appointment and replacement of the Chair). In addition to a Chair, the Board has also appointed a lead Independent Director to provide for leadership of the Independent Directors, and to assure that they fulfill their independent watchdog functions. The lead Independent Director presides at private sessions of the Board at which only Independent Directors are present, serves as a liaison for legal counsel to the Independent Directors, serves as a liaison with whom

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other Independent Directors may raise issues and suggest topics of potential Board-wide interest, or for future private sessions of the Independent Directors, and serves as a single point of communication between the Board and management or the Chair between meetings.

Board Committees

The Fund has established a Nominating Committee, an Audit Committee, an Investment Oversight Committee, and a Regulatory and Compliance Committee. As of the date of this SAI, the Nominating, Audit, Investment Oversight and Regulatory and Compliance Committees were composed of Mses. Brown, Hanson, and Levy-Navarro and Messrs. Gerber, Ribbens, and Ullmann, each of whom is an Independent Director.

The Nominating Committee is authorized to select and nominate those directors of the Fund who are not “interested persons” of the Fund. While the Nominating Committee is solely responsible for the selection and nomination of potential candidates to serve on the Board, the Nominating Committee may consider and evaluate nominations submitted by shareholders of the Fund. Shareholders desiring to have the Nominating Committee consider a potential candidate must submit such nomination in writing to the Secretary of the Fund at 720 E. Wisconsin Ave, Milwaukee, WI 53202. While the Nominating Committee does not have a formal process for identifying and evaluating nominees, it seeks to identify candidates based on the criteria set forth in its charter. These criteria encompass a candidate’s independence, business and professional experience, education, other board and leadership experience, character, how the candidate’s particular skills would enhance overall Board composition and such other factors as the Committee may deem relevant from time to time. The Nominating Committee meets when necessary to consider the nomination of new directors. Ms. Brown is the current chair of the Nominating Committee. The functions of the Audit Committee, Investment Oversight Committee, and Regulatory and Compliance Committee are discussed below, under “Board Role in Risk Oversight.”

Board Role in Risk Oversight

The Board carries out its risk oversight function at both the full Board and committee level. As described in more detail below, the Board provides direct oversight of most matters, but has delegated specific oversight functions for certain matters to the Board’s Audit Committee, Investment Oversight Committee, and Regulatory and Compliance Committee.

The Board provides oversight of general risk management functions performed by or for the benefit of the Fund through the oversight of the Fund’s Risk Management Plan. The Fund’s Risk Management Plan identifies key risks for the Fund and the business owners of such risks, assesses the risks, and sets forth the policies, procedures and processes in place to monitor and manage the risks. The Board reviews the policies, procedures and processes relied on and used by management to assess and manage the Fund’s exposure to major risks through the receipt of periodic reports from management on the Fund’s risk management practices, key risks affecting the Fund and how these key risks are being monitored and managed. The Board also oversees and discusses matters relating to investment risk, receiving and reviewing quarterly reports on the overall markets, Fund performance, investment management processes and techniques used, attribution analyses, risk/return attributes, diversification, derivatives usage and compliance, and summaries of counterparty exposure. Finally, the Board reviews issues relating to the fair valuation of securities held in the various Portfolios and receives a report from Mason Street Advisors, LLC, who has been appointed as the Fund’s valuation designee. As part of each Board meeting, the Board receives a presentation from the Fund’s valuation designee relating to the fair valuation of Portfolio securities and related matters.

The Board has established an Audit Committee, comprised of Mses. Brown, Hanson, and Levy-Navarro and Messrs. Gerber, Ribbens, and Ullmann, and currently chaired by Mr. Gerber, to provide oversight over the integrity of the Fund’s financial statements. In support of this role, the Audit Committee has direct access to the Fund’s Principal Executive and Senior Financial Officers, internal auditors and independent accountants. The Audit Committee, which meets quarterly in conjunction with the Fund’s regularly scheduled Board meetings and otherwise as may be determined necessary, oversees the selection of the Fund’s independent registered public accounting firm and reviews other services provided by such firm. Four meetings of the Audit Committee were held during the fiscal year ended December 31, 2024. The Audit Committee also receives periodic reports from Northwestern Mutual’s Corporate Audit and Anti-Fraud team (“CAAF”) on the status of its Audit Plan, which provides information relating to CAAF’s ongoing examinations of a variety of operational, regulatory and legal risks.

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The Board has established an Investment Oversight Committee, comprised of Mses. Brown, Hanson, and Levy-Navarro and Messrs. Gerber, Ribbens, and Ullmann, and currently chaired by Mr. Ullmann, to oversee the process for evaluating the Fund’s Adviser and Sub-Advisers. The Committee meets in conjunction with each regular Board meeting at which the approval or renewal of an investment advisory or sub-advisory contract is being considered. Four meetings of the Investment Oversight Committee were held in the fiscal year ended December 31, 2024. On an ongoing basis, the Investment Oversight Committee reviews reports detailing the short and long term performance of each Portfolio as well as Portfolio rankings and ratings. In connection with the investment advisory contract renewal process, the Investment Oversight Committee meets with the Adviser and each Sub-Adviser in person and/or via teleconference and reviews materials submitted by the Adviser and Sub-Advisers as well as summaries prepared by the Adviser relating to the adviser’s overall business, organization and management structure, the investment objective, philosophy and investment process relating to the Portfolio, Portfolio performance, benchmark performance comparison, peer rankings and ratings, fees and expenses, style consistency, use of complex securities, management teams, compliance matters, and other operational issues.

The Board has established a Regulatory and Compliance Committee comprised of Mses. Brown, Hanson, and Levy-Navarro and Messrs. Gerber, Ribbens, and Ullmann, and currently chaired by Mr. Ribbens, to oversee the administration of the Fund’s compliance program and implementation of the Fund’s compliance policies and procedures, and to monitor legal and regulatory developments that could have a significant impact on the Fund. Four meetings of the Regulatory and Compliance Committee were held in the fiscal year ended December 31, 2024. The Committee receives compliance summaries on a quarterly basis, as well as formal compliance reports prepared by the Fund’s chief compliance officer (“CCO”) at least annually. The Fund’s CCO has a direct line of communication to the Board’s lead Independent Director. In addition, the CCO meets with all of the Independent Directors in private session at least annually, or more frequently as determined from time to time by the CCO, the Board’s lead Independent Director, or both, in connection with each of the Fund’s regularly scheduled quarterly meetings.

Board Member Qualifications

The Board believes that it, collectively, possesses the appropriate skills and experience to oversee the Fund’s operations. Each Board member shares certain general attributes, including high ethical standards, attention to detail and an ability to work in a group decision making environment. However, the directors also have a balanced and diverse, though complementary, set of relevant skills and experience that assists the Board, as a body, to fulfill its oversight responsibilities.

Ms. Kropp brings extensive business experience and significant knowledge of insurance products gained through various roles held at Northwestern Mutual, as well as through prior roles at Allianz Investment Management and Delaware Investments, among others. Ms. Kropp currently serves as Vice President – Insurance Solutions (since October 2024) and previously served as Vice President and Head of Public Investments from 2022 until September 2024 and Vice President and Head of Investment Strategy of Northwestern Mutual from 2019 to 2021. In her role as Vice President – Insurance Solutions, she leads a team responsible for the design, strategy, and implementation of Northwestern Mutual’s personal and institutional insurance products. In her prior role as Head of Public Investments, she was responsible for Northwestern Mutual’s investment grade and high yield portfolios, and as Head of Investment Strategy, Ms. Kropp was responsible for leading Northwestern Mutual’s asset allocation process, relative portfolio positioning, and public equity portfolio management, in addition to being responsible for other strategic investment initiatives. Ms. Kropp is a CFA charterholder and received her B.B.A. with distinction in actuarial science from the University of Wisconsin-Madison.

Ms. Brown brings business management experience gained in part through her current position as President of Alverno College, through her previous position as Chief Executive Officer of the Girl Scouts of Wisconsin Southeast, through her position as Vice Chancellor, Finance and Administrative Affairs of the University of Wisconsin, Milwaukee, the second largest university in Wisconsin, and through her previous experience as Chief Operating Officer at Milwaukee Area Technical College (“MATC”), Wisconsin’s largest two-year community based technical college. Through her legal background, and her previous role as General Counsel at MATC and other legal positions, Ms. Brown brings critical thinking and legal analysis skills and an ability to easily grasp and identify legal and regulatory issues.

Ms. Hanson brings particular experience in financial and accounting matters gained through her prior position as Chief Financial Officer of Aurora Health Care (“Aurora”), in which capacity she was responsible for capital and operating budgets, accounting, and financial reporting for Aurora, and her prior position as Chief Financial Officer for a

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health insurance company and as audit manager for PricewaterhouseCoopers LLP. Ms. Hanson also brings particular experience in the financial services industry and investments through her role as prior chair of Aurora’s investment committee, her current service as a lead independent director, serving as independent chair of the board of directors for another mutual fund company and her prior position as Deputy Executive Director of the State of Wisconsin Investment Board.

Mr. Gerber brings significant experience in corporate finance and accounting matters gained through his prior positions as Executive Vice President and Chief Financial Officer of TD Ameritrade Holding Corporation (TD Ameritrade) where he oversaw investor relations, business development, certain treasury functions and finance operations, and as audit manager primarily focusing on public companies for Coopers & Lybrand, now known as PricewaterhouseCoopers LLP. Mr. Gerber also brings experience in the asset management industry through his prior position as a Manager of Amerivest Investment Management, LLC, a registered investment adviser and wholly owned subsidiary of TD Ameritrade. Through his position as a director of a public operating company, where he serves on the compensation, audit, and nominating and corporate governance committees, he also brings a different perspective on corporate governance. He also has experience with operational issues.

Mr. Ribbens brings significant business experience in the asset management industry through his current role as Member and Partner of a Wisconsin registered investment adviser, and through his former role as President and Managing Partner of Heartland Advisors, Inc., a registered investment adviser, where he oversaw day to day operations of the firm and its strategic direction. His experience with investment teams, particularly on the equity side, and his role in investment product creation contributes positively to his ability to evaluate investment personnel, process and performance provided by the Fund’s sub-advisers. He also brings valuable experience through his experience as a member of the investment committee of a prior employer and in other areas of the investment management industry, including distribution, brokerage and insurance sales.

Mr. Ullmann brings significant investment experience in the fixed income markets, particularly structured products and mortgage-backed securities, gained through his previous experience as an executive officer and leader within the fixed income divisions of a number of financial services firms. Mr. Ullmann also has a strong working knowledge of the equity markets, gained in part through his work as Chief Operating Officer of the global research division of a major investment bank. He also brings a broad base of knowledge of the investment management business and securities markets through his experience with mutual fund, bank, insurance and hedge fund clients, and has familiarity with risk management, regulatory and compliance issues gained through previous experience and as founder and principal of DMU Financial Consulting, LLC, a financial services consulting firm. His experience with building and assessing teams is perceived to be particularly helpful when evaluating the capabilities of the Fund’s sub-advisers.

Ms. Levy-Navarro brings significant financial services and business experience gained through her prior position as Co-founder and Chief Executive Officer of Orrington Strategies, a management consulting firm assisting investment management, insurance, and consumer product executives in growing their businesses and brands. She currently serves as a corporate advisor with Summit Strategy Advisors, advising financial services companies on business growth strategies and product innovation. Ms. Levy-Navarro also brings valuable experience in the financial services industry through her role as a member of the board of directors for another mutual fund company and her service as chair of the valuation committee. She brings a seasoned perspective on corporate governance through her experience as a member of the board of directors for multiple companies.

Compensation of Officers and Directors

Pursuant to the Amended and Restated Advisory Agreement with the Fund dated April 30, 2012, Mason Street Advisors, LLC, the investment adviser to the Fund, is responsible for the compensation of its personnel and the personnel of the Fund, except for the compensation, fees and expenses of the Independent Directors and the compensation, benefits and expenses of the Fund’s CCO and his or her compliance staff (or a portion thereof relating to their duties and functions for the Fund if they serve multiple roles), among other expenses. For more information, see “Investment Advisory and Other Services – The Adviser” below.

During fiscal 2024, the Independent Directors then in office were paid for their services as directors of the Fund, a total of $217,000 per year, consisting of an $135,000 retainer and per meeting fees of $20,500 per regular meeting. The lead Independent Director receives an additional fee of 20% of the annual base director fee (which includes the annual retainer plus meeting fees paid) and the chairs of the Audit, Regulatory and Compliance, Investment

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Oversight and Nominating Committees each receives an additional fee of 10% of the annual base director fee. For each telephonic Board meeting in a calendar year in excess of two, an additional fee of $2,000 per meeting is paid as compensation. Director compensation is established by the directors and is reevaluated annually, typically at its meeting in February. The Fund may reimburse the directors for certain expenses associated with their attendance at, and participation in, meetings of the Board, and continuing education expenses.

The table below sets forth the compensation paid by the Fund to the Fund’s CCO and the Independent Directors during the 2024 fiscal year.

Compensation Table

(1) Name of Person, Position	(2) Aggregate Compensation From Registrant1	(3) Pension or Retirement Benefits Accrued as Part of Fund Expenses2	(4) Estimated Annual Benefits Upon Retirement2		(5) Total Compensation Paid to Directors in 20241
Independent Directors
Christy L. Brown Director	238,500	None	None	238,500
William J. Gerber Director	238,500	None	None	238,500
Gail L. Hanson Director	260,500	None	None	260,500
Elizabeth A. Levy-Navarro Director	108,500	None	None	108,500
David Ribbens Director	238,500	None	None	238,500
Donald M. Ullmann Director	238,500	None	None	238,500
Officers
Michael J. Conmey CCO	86,500	None	None	N/A

1 Compensation amounts shown do not reflect expense reimbursements that may have been paid to directors during the period.

2 The Fund does not maintain or sponsor a pension or retirement plan.

Directors’ and Officers’ Holdings

All of the outstanding shares of each Portfolio are owned by Northwestern Mutual through its separate investment accounts (either directly or indirectly through one or more underlying portfolios operating as an affiliated fund of funds). Because the Portfolios serve as underlying investment vehicles for Northwestern Mutual’s variable life and variable annuity products, interests in the Portfolios may only be acquired through ownership of one or more of those products. The Independent Directors would no longer be considered independent within the meaning of the 1940 Act, if they were to invest in variable contracts issued by Northwestern Mutual.

The table below shows, for each director, the dollar amount of shares of each Portfolio beneficially owned by the director. It also shows the aggregate value of all investments in shares of the Series Fund overseen by the director. Ownership information is presented in the following ranges: A=$0; B= $1 - $10,000; C= $10,001 - $50,000; D= $50,001 - $100,000; and E= over $100,000.

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	Dollar Range of Equity Securities in the Portfolios		Aggregate Dollar Range of Equity Securities in All Portfolios Overseen by Director in Family of Investment Companies
	Name of Portfolio	Dollar Range
Independent Director	N/A	A	A
Christy L. Brown	N/A	A	A
William J. Gerber	N/A	A	A
Gail L. Hanson	N/A	A	A
Elizabeth A. Levy-Navarro	N/A	A	A
David Ribbens	N/A	A	A
Donald M. Ullmann	N/A	A	A
Interested Director	N/A	A	A
Rosanne L. Kropp	N/A	A	A

As of December 31, 2024, the directors and executive officers of the Fund, as a group, beneficially owned less than 1% of the shares of each Portfolio.

Codes of Ethics

The Fund and Mason Street Advisors, LLC have adopted codes of ethics under Rule 17j-1 under the 1940 Act. These codes permit personnel subject to the codes to invest in securities, including securities that may be purchased or held by the Fund.

Approval of the Investment Advisory Agreement

On an annual basis, the directors of the Fund request and evaluate information that they and the Fund’s investment adviser determines to reasonably be necessary for the directors to evaluate the terms of the investment advisory agreement between the Fund and its investment adviser, Mason Street Advisors, LLC in accordance with their respective responsibilities under the 1940 Act. A discussion regarding the action taken and the basis for approval by the Fund’s board of directors of the advisory agreement approved during the reporting period will appear in the Fund’s semi-annual shareholder report.

OWNERSHIP OF SHARES OF THE FUND

All of the outstanding shares of the Fund are held by Northwestern Mutual for its separate investment accounts (either directly or indirectly through one or more underlying portfolios operating as affiliated fund of funds) used for funding variable annuity contracts and variable life insurance policies. As of the date of this SAI, no shares were held by Northwestern Mutual for its General Account. Additional shares are being offered only to Northwestern Mutual and the separate investment accounts. Northwestern Mutual is a Wisconsin corporation.

The tables set forth in Appendix C show the allocation of shares of the Portfolios of the Fund among the separate investment accounts as of March 31, 2025.

The shares held in connection with the separate investment accounts are voted by Northwestern Mutual in accordance with instructions received from owners of variable annuity contracts and variable life insurance policies. If applicable laws or regulations change so as to permit Northwestern Mutual to vote the Fund shares in its own discretion, it may elect to do so.

Any shares held by Northwestern Mutual in its General Account would represent seed money invested in one or more Portfolios. A redemption by Northwestern Mutual of its seed money in a Portfolio could cause an increase in the portfolio turnover rate of the Portfolio and could increase expenses. Northwestern Mutual would be permitted to redeem its seed money in a Portfolio at any time without notice.

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INVESTMENT ADVISORY AND OTHER SERVICES

The Adviser

The Fund’s investment adviser, Mason Street Advisors, LLC (“Mason Street Advisors”), is a wholly owned company of Northwestern Mutual. Founded in 1857, Northwestern Mutual is a mutual insurance company organized under the laws of the state of Wisconsin. Northwestern Mutual and its subsidiaries and affiliates offer life, disability and long-term care insurance, investment products, advisory services and financial planning. Mason Street Advisors provides investment advice and recommendations regarding the purchase and sale of securities for the Portfolios and the selection of brokers pursuant to an Amended and Restated Advisory Agreement (the “Agreement”). Mason Street Advisors employs a staff of investment professionals to manage the assets of the Fund and the other advisory clients of Mason Street Advisors. Northwestern Mutual provides related back-office facilities and personnel which are utilized by Mason Street Advisors in performing its obligations under the Agreement. The Agreement authorizes Mason Street Advisors to employ one or more sub-advisers for the purpose of providing investment management services to each Portfolio.

The Agreement also provides that Mason Street Advisors will provide or procure certain specified services for the Fund. The Agreement permits Mason Street Advisors to delegate some or all of the administrative functions to others, including affiliates. Pursuant to the Agreement, Mason Street Advisors has agreed to assume expenses incurred by it in connection with managing the investment advisory and administrative operations of the Fund (such as office space, facilities and equipment), fees and expenses of the personnel of Mason Street Advisors and the Fund (except compensation, fees and expenses of the Independent Directors and the compensation, benefits and expenses of the Fund’s CCO and his or her compliance staff that relate to Fund compliance functions), fees of sub-advisers appointed by Mason Street Advisors, and expenses Mason Street Advisors otherwise agrees to assume pursuant to expense cap or reimbursement agreements with the Fund (see “Expense Limitation Agreements” below). All other administrative and operating expenses are the responsibility of the individual Portfolios of the Fund. The Agreement includes an illustrative list of those expenses to be assumed by the Portfolios.

For acting as investment adviser and for providing the services and paying the expenses set forth in the Agreement, Mason Street Advisors is paid a monthly asset based advisory fee at the annual rates set forth in the prospectus for the respective Portfolios. The following table reflects the advisory fees received by Mason Street Advisors for fiscal years ended December 31, 2022, December 31, 2023, and December 31, 2024, for its services as investment advisor to the Fund.

Name of Portfolio	2024 Fees	2023 Fees	2022 Fees
Growth Stock Portfolio	$5,103,998	$3,865,595	$3,989,987
Focused Appreciation Portfolio	$8,284,189	$7,015,370	$6,422,412
Large Cap Core Stock Portfolio	$2,998,189	$2,576,733	$2,758,826
Large Cap Blend Portfolio	$1,161,505	$1,290,523	$1,364,401
Index 500 Stock Portfolio	$11,467,017	$9,340,804	$8,944,553
Large Company Value Portfolio	$1,015,878	$978,545	$1,220,809
Domestic Equity Portfolio	$5,198,864	$4,961,595	$5,051,627
Equity Income Portfolio	$4,062,565	$3,800,498	$4,240,784
Mid Cap Growth Stock Portfolio	$5,499,194	$5,389,716	$5,691,008
Index 400 Stock Portfolio	$2,990,035	$2,626,548	$2,601,532
Mid Cap Value Portfolio	$4,482,880	$4,445,464	$4,600,561
Small Cap Growth Stock Portfolio	$3,832,796	$3,392,905	$3,454,207
Index 600 Stock Portfolio	$1,012,756	$879,713	$875,040
Small Cap Value Portfolio	$4,831,994	$4,575,363	$4,908,335
International Growth Portfolio	$6,197,728	$5,585,983	$5,246,436
Research International Core Portfolio	$5,946,765	$5,589,040	$5,610,322
International Equity Portfolio	$12,663,820	$11,825,130	$10,373,643
Emerging Markets Equity Portfolio	$8,598,581	$7,570,753	$7,478,342
Government Money Market Portfolio	$1,554,504	$1,596,194	$1,323,593
Short-Term Bond Portfolio	$1,255,685	$1,249,891	$1,281,930
Select Bond Portfolio	$8,433,766	$8,281,019	$8,865,189
Long-Term U.S. Government Bond Portfolio	$595,090	$568,650	$583,911
Inflation Managed Portfolio	$1,642,222	$2,016,758	$2,291,937

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Name of Portfolio	2024 Fees	2023 Fees	2022 Fees
High Yield Bond Portfolio	$2,973,699	$3,004,803	$3,097,776
Multi-Sector Bond Portfolio	$8,454,746	$7,735,580	$7,848,092
Active/Passive Moderate Portfolio	$231,848	$132,365	$137,897
Active/Passive Balanced Portfolio	$1,639,907	$954,378	$1,018,646

Expense Limitation Agreements

Portfolio	Expense Cap	Expiration
Focused Appreciation	0.90 %	April 30, 2026
Large Cap Blend	0.85 %	April 30, 2026
Large Company Value	0.80 %	April 30, 2026
Domestic Equity	0.75 %	April 30, 2026
Equity Income	0.75 %	April 30, 2026
Mid Cap Value	1.00 %	April 30, 2026
Index 600 Stock	0.35 %	April 30, 2026
Small Cap Value	1.00 %	April 30, 2026
International Growth	1.10 %	April 30, 2026
Research International Core	1.15 %	April 30, 2026
Emerging Markets Equity	1.50 %	April 30, 2026
Short-Term Bond	0.45 %	April 30, 2026
Long-Term U.S. Government Bond	0.65 %	April 30, 2026
Inflation Managed	0.65 %	April 30, 2026
Multi-Sector Bond	0.90 %	April 30, 2026
Active/Passive Moderate	0.75 %	April 30, 2026

Advisory Fee Waiver Agreements

Growth Stock Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Growth Stock Portfolio on average net assets over $1 billion such that the fee is 0.60% on the Portfolio’s first $50 million of average net assets, 0.50% on the next $50 million, 0.40% on the next $900 million, and 0.38% on average net assets in excess of $1 billion. This fee waiver agreement may not be terminated prior to April 30, 2026, without action by the Board of Directors.

Focused Appreciation Portfolio. Mason Street Advisors has agreed to waive its investment management fee relating to the Focused Appreciation Portfolio such that the management fee is 0.66% on first $100 million of the Portfolio’s average net assets, 0.61% on the next $400 million, 0.60% on the next $500 million, and 0.57% on average net assets in excess of $1 billion. This fee waiver agreement may not be terminated prior to April 30, 2026, without action by the Board of Directors.

Large Cap Blend Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Large Cap Blend Portfolio such that the management fee is 0.65% on the Portfolio’s first $150 million of average net assets, 0.55% on the next $150 million, 0.55% on the next $200 million and 0.52% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026, without action by the Board of Directors.

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Large Company Value Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Large Company Value Portfolio such that the management fee is 0.67% on the Portfolio’s first $100 million of average net assets, 0.62% on the next $150 million, 0.59% on the next $250 million, and 0.57% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026, without action by the Board of Directors.

Equity Income Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Equity Income Portfolio such that the management fee is 0.56% on the Portfolio’s first $500 million of average net assets, 0.53% on the next $1 billion and 0.52% on average net assets in excess of $1.5 billion. This fee waiver agreement may not be terminated prior to April 30, 2026, without action by the Board of Directors.

Mid Cap Value Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Mid Cap Value Portfolio such that the fee is 0.78% on the Portfolio’s first $150 million of average net assets, 0.66% on the next $350 million, and 0.63% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026, without action by the Board of Directors.

Research International Core Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Research International Core Portfolio such that its management fee is 0.80% on the Portfolio’s first $150 million of average net assets, 0.74% of the next $150 million, 0.67% on the next $200 million, and 0.60% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026, without action by the Board of Directors.

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Government Money Market Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Government Money Market Portfolio on average net assets over $500 million such that its management fee is 0.30% on the Portfolio’s first $500 million of average net assets, 0.29% on the next $500 million, and 0.28% on average net assets in excess of $1 billion. This fee waiver agreement may not be terminated prior to April 30, 2026, without action by the Board of Directors. In addition, Mason Street Advisors has voluntarily agreed to waive its advisory fee and/or reimburse expenses in excess of the Government Money Market Portfolio’s daily yield so as to maintain a zero or positive yield for the Portfolio. This voluntary waiver is reviewed periodically by Mason Street Advisors in light of market and economic developments and may be revised or discontinued at any time without advance notice.

Select Bond Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Select Bond Portfolio on average net assets over $2 billion such that the management fee is 0.30% on the first $2 billion of average net assets and 0.28% on average net assets in excess of $2 billion. This fee waiver agreement may not be terminated prior to April 30, 2026, without action by the Board of Directors.

Inflation Managed Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Inflation Managed Portfolio such that the management fee is 0.42% on the Portfolio’s first $100 million of average net assets, 0.40% of the next $150 million and 0.38% on average net assets in excess of $250 million. This fee waiver agreement may not be terminated prior to April 30, 2026, without action by the Board of Directors.

Multi-Sector Bond Portfolio. Mason Street Advisors has agreed to waive a portion of its management fee relating to the Multi-Sector Bond Portfolio such that the management fee is 0.73% on the Portfolio’s first $100 million of average net assets, 0.72% on the next $150 million, 0.69% on the next $250 million, and 0.64% on average net assets in excess of $500 million. This fee waiver agreement may not be terminated prior to April 30, 2026, without action by the Board of Directors.

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“Northwestern Mutual Life” is the name and service mark of The Northwestern Mutual Life Insurance Company and the right of the Fund to use the name and mark is subject to the consent of Northwestern Mutual. Under the agreement providing such consent, the Fund recognizes the prior rights of Northwestern Mutual in the name and mark, agrees that use of the name and mark by the Fund will inure to the benefit of Northwestern Mutual and agrees that its right to use the name and mark can be terminated by Northwestern Mutual and will automatically be terminated if at any time Mason Street Advisors ceases to be the investment adviser to the Fund or if Mason Street Advisors ceases to be an affiliated company of Northwestern Mutual.

The Sub-Advisers

Sub-advisory fees paid by Mason Street Advisors to each sub-adviser for the indicated fiscal years are set forth below. Information set forth in the chart includes aggregate advisory fees paid to each sub-adviser for the last three fiscal years shown both as a dollar amount and as a fee rate percentage of the related Portfolio(s) assets, utilizing the sub-advisory fee schedule effective for the periods shown. (Current sub-advisory fee rates for Portfolio(s) managed by each sub-adviser are set forth on the sub-adviser firm descriptions immediately following the chart.) The figures noted for the fee rate percentage are determined by using the individual Portfolio’s average daily net assets for each of the identified years. In instances where the sub-adviser has served for a partial year, the percentage of net assets is determined by (i) using the Portfolio’s average daily net assets for the portion of the year for which the sub-adviser provided services; and (ii) calculating the fee percentage on an annualized basis.

Portfolio	Sub-Advisor	For the fiscal year ended Dec. 31, 2024	Fee Rate	For the fiscal year ended Dec. 31, 2023	Fee Rate	For the fiscal year ended Dec. 31, 2022	Fee Rate
Growth Stock Portfolio	TRPA	$3,595,264	0.29%	$2,894,069	0.31%	$3,048,264	0.32%
Focused Appreciation Portfolio	Loomis Sayles	$4,614,303	0.33%	$3,879,915	0.33%	$3,539,361	0.33%
Large Cap Core Stock Portfolio	Wellington Management	$1,256,391	0.17%	$1,177,579	0.19%	$1,266,189	0.19%
Large Cap Blend Portfolio	Fiduciary	N/A	0.00%	$323,847	0.29%	$813,827	0.42%
Large Cap Blend Portfolio	JPMorgan	$451,839	0.26%	$194,414	0.26%	N/A	0.00%
Index 500 Stock Portfolio1	BlackRock	$491,856	0.01%	$397,362	0.01%	$379,755	0.01%
Large Company Value Portfolio	American Century	$436,279	0.28%	$460,984	0.31%	$568,537	0.31%
Domestic Equity Portfolio	Delaware	$2,263,245	0.21%	$2,271,516	0.22%	$2,336,614	0.22%
Equity Income Portfolio	TRPA	$2,076,944	0.28%	$1,948,229	0.28%	$2,162,773	0.28%
Mid Cap Growth Stock Portfolio	Wellington Management	$2,678,922	0.31%	$3,193,113	0.31%	$3,365,373	0.31%
Mid Cap Growth Stock Portfolio	JPMorgan	$581,346	0.31%	N/A	0.00%	N/A	0.00%
Index 400 Stock Portfolio2	Northern Trust	$353,023	0.03%	$387,642	0.03%	$385,150	0.03%
Mid Cap Value Portfolio	American Century	$2,557,193	0.39%	$2,644,753	0.41%	$2,769,060	0.41%
Small Cap Growth Stock Portfolio	Wellington Management	$2,746,779	0.38%	$2,759,148	0.44%	$2,808,344	0.43%
Index 600 Stock Portfolio3	Northern Trust	$193,112	0.04%	$194,912	0.05%	$193,758	0.05%
Small Cap Value Portfolio	TRPIM	$3,400,262	0.59%	$3,223,358	0.60%	$3,452,557	0.59%
International Growth Portfolio	FIAM	$3,999,923	0.38%	$3,717,601	0.39%	$3,483,036	0.39%
Research International Core Portfolio	MFS	$3,416,201	0.39%	$3,313,551	0.42%	$3,524,357	0.45%
International Equity Portfolio	Dodge & Cox	$8,698,536	0.45%	$8,117,437	0.45%	$7,813,739	0.45%
Emerging Markets Equity Portfolio	abrdn	$5,806,856	0.57%	$5,169,822	0.58%	$5,045,275	0.59%
Government Money Market Portfolio	BlackRock	$257,518	0.05%	$313,278	0.06%	$307,034	0.06%
Short-Term Bond Portfolio	TRPA	$442,656	0.11%	$441,608	0.11%	$451,186	0.11%
Select Bond Portfolio	Allspring	$3,082,213	0.11%	$3,496,089	0.12%	$3,716,706	0.12%
Long-Term U.S. Government Bond Portfolio	PIMCO	$266,837	0.23%	$251,764	0.23%	$254,659	0.22%
Inflation Managed Portfolio	American Century	$410,985	0.10%	$872,386	0.21%	$1,051,272	0.23%

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Portfolio	Sub-Advisor	For the fiscal year ended Dec. 31, 2024	Fee Rate	For the fiscal year ended Dec. 31, 2023	Fee Rate	For the fiscal year ended Dec. 31, 2022	Fee Rate
High Yield Bond Portfolio	Federated	$1,508,888	0.21%	$1,520,550	0.21%	$1,555,415	0.21%
Multi-Sector Bond Portfolio	PIMCO	$4,918,761	0.39%	$4,804,185	0.42%	$4,873,429	0.42%

1 Prior to October 28, 2024, Wellington Management Company LLP acted as sub-adviser for the Mid Cap Growth Stock Portfolio and was paid $2,678,921.72 for sub-advisory services for January 1, 2024 to October 28, 2024 equal to 0.31% of net assets, $3,193,112.64 for sub-advisory services for the fiscal year ended December 31, 2023 equal to 0.31% of net assets and $3,365,372.52 for sub-advisory services for the fiscal year ended December 31, 2022 equal to 0.31% of net assets.

2Prior to July 31, 2023, Fiduciary Management, Inc. acted as sub-adviser for the Large Cap Blend Portfolio and was paid $323,847.29 for sub-advisory services for January 1, 2023 – July 31, 2023 equal to 0.29% of net assets, $813,827.40 for sub-advisory services for the fiscal year ended December 31, 2022 equal to 0.42% of net assets and $811,281.50 for sub-advisory services for the fiscal year ended December 31, 2021 equal to 0.42% of net assets.

abrdn Investments Limited (“abrdn”), a Scottish company, with its registered offices at 10 Queen’s Terrace, Aberdeen, Scotland AB10 1YG, provides investment services to the Emerging Markets Equity Portfolio pursuant to an investment sub-advisory agreement. (abrdn was formerly known as Aberdeen Asset Managers Limited.) abrdn is an indirect wholly-owned subsidiary of aberdeen group plc (formerly known as Standard Life Aberdeen plc), which has registered offices at 1 George Street, Edinburgh, Scotland EH2 2LL. aberdeen group plc, combined with its subsidiaries and affiliates, manages or administers approximately $630.74 billion in assets as of June 30, 2021. aberdeen group plc provides asset management and investment solutions for clients and customers worldwide and also has a strong position in the pensions and savings market. For services to the Emerging Markets Equity Portfolio, Mason Street Advisors pays abrdn a fee at an annual rate equal to a percentage of the Portfolio’s average daily net assets of: 0.70% on the first $250 million in assets, 0.60% on the next $250 million, 0.50% on the next $500 million and 0.40% on assets over $1 billion. abrdn began providing sub-advisory services to the Emerging Markets Equity Portfolio as of March 24, 2017. As of December 31, 2024, assets under management for aberdeen group plc were approximately $463 billion.

Allspring Global Investments, LLC (“Allspring”), 1415 Vantage Park Drive, Charlotte, North Carolina, 28203, provides investment services to the Select Bond Portfolio pursuant to an investment sub-advisory agreement. Allspring is a wholly-owned subsidiary of Allspring Global Investment Holdings, LLC, a holding company indirectly owned by certain private funds of GTCR LLC and Reverence Capital Partners, L.P. For the services provided for the Select Bond Portfolio, Mason Street Advisors pays Allspring a fee at the annual rate of 0.14% of the Portfolio’s net assets on the first $500 million of assets, reduced to 0.12% on the next $500 million, reduced to 0.10% on the next $1 billion and 0.09% on assets over $3 billion. As of December 31, 2024, assets under management were approximately $451.68 billion.

American Century Investment Management, Inc. (“American Century”), 4500 Main Street, Kansas City, Missouri 64111, provides investment services to the Large Company Value Portfolio, the Mid Cap Value Portfolio, and the Inflation Managed Portfolio, pursuant to an investment sub-advisory agreement. American Century has been managing funds since 1958. For the services provided for the Large Company Value Portfolio, Mason Street Advisors pays American Century a fee at an annual rate of 0.28% on the first $500 million of assets, 0.25% on the next $500 million and 0.23% on assets in excess of $1 billion. For the services provided to the Mid Cap Value Portfolio, Mason Street Advisors pays American Century at an annual rate of 0.39% on the first $1 billion of assets and 0.35% on assets over $1 billion. For the services provided to the Inflation Managed Portfolio, Mason Street Advisors pays American Century at an annual rate of 0.12% on the first $200 million of assets and 0.08% on assets over $200 million. As of December 31, 2024, assets under management were approximately $262 billion.

BlackRock Advisors, LLC (“BlackRock”), 100 Bellevue Parkway, Wilmington, Delaware 19809, an indirect, wholly-owned subsidiary of BlackRock, Inc., provides investment services to the Government Money Market Portfolio and the Index 500 Stock Portfolio pursuant to investment sub-advisory agreements. BlackRock was organized in 1994 to perform advisory services for investment companies. For the services provided for the Government Money Market Portfolio, Mason Street Advisors pays BlackRock a fee at the annual rate of 0.05% of the Portfolio’s net assets on the first $500 million, reduced to 0.04% on the next $500 million and 0.03% on assets over $1 billion. For the services provided for the Index 500 Stock Portfolio, Mason Street Advisors pays BlackRock a fee at the annual rate of 0.008% of the Portfolio’s net assets. As of December 31, 2024, assets under management were approximately $959 billion.

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Delaware Investments Fund Advisers (“Delaware”), a series of Macquarie Investment Management Business Trust (“MIMBT”), 610 Market Street, Philadelphia, Pennsylvania, 19106, provides services to the Domestic Equity Portfolio pursuant to an investment sub-advisory agreement. MIMBT is a subsidiary of Macquarie Management Holdings, Inc. (“MMHI”). Macquarie Asset Management is the marketing name for certain companies comprising the asset management division of Macquarie Group, including Delaware. MMHI is a wholly owned subsidiary of Macquarie Group Ltd. (“MGL”). MGL, a Sydney, Australia-headquartered global provider of banking, financial, advisory, investment and funds management services. For services provided on behalf of the Domestic Equity Portfolio, Mason Street Advisors pays Delaware at the annual rate of 0.35% of the first $100 million of the Portfolio assets, 0.30% on the next $100 million, 0.20% on the next $300 million, and 0.175% on assets in excess of $500 million. As of December 31, 2024, assets under management were approximately $583.4 billion.

Dodge & Cox, 555 California Street, San Francisco, California 94104, provides investment services to the International Equity Portfolio pursuant to an investment sub-advisory agreement. Dodge & Cox, a California corporation, is one of the oldest professional investment management firms in the United States, having acted continuously as investment managers since 1930. Dodge & Cox’s activities are devoted to investment research and the supervision of investment accounts for individuals and institutions. For the services provided for the International Equity Portfolio, Mason Street Advisors pays Dodge & Cox a fee at an annual rate of 0.60% of the Portfolio’s net assets on the first $500 million, 0.45% on assets over $500 million and reset to 0.45% at $1.5 billion (flat rate applicable to all portfolio assets). As of December 31, 2024, assets under management were approximately $400.3 billion.

Federated Investment Management Company (“Federated”), 1001 Liberty Avenue, Pittsburgh, Pennsylvania 15222-3779, provides investment services to the High Yield Bond Portfolio pursuant to an investment sub-advisory agreement. Federated is an indirect, wholly-owned subsidiary of Federated Hermes, Inc. (“FHI”). FHI is a client-driven, multiproduct, and multi-strategy investment manager. FHI provides world-class active investment management and engagement services to more than 11,000 institutions and intermediaries including corporations, government entities, insurance companies, foundations and endowments, banks, and broker/dealers. For the services provided for the High Yield Bond Portfolio, Mason Street Advisors pays Federated a fee at the annual rate of 0.40% of the Portfolio’s net assets on the first $50 million of assets, reduced to 0.25% on the next $200 million, reduced to 0.20% on the next $250 million, reduced to 0.15% on the next $500 million, reduced to 0.125% on the next $500 million and 0.10% on assets over $1.5 billion. As of December 31, 2024, assets under management were approximately $829.6 billion.

FIAM LLC (“FIAM”), 900 Salem Street, Smithfield, Rhode Island, 02917, provides investment services to the International Growth Portfolio, pursuant to an investment sub-advisory agreement. FIAM and its FIAM® Group affiliates provide investment management services to institutional investors worldwide. FIAM is an indirectly held, wholly owned subsidiary of FMR LLC. For the services provided on behalf of the International Growth Portfolio, Mason Street Advisors pays FIAM at the annual rate of 0.42% on the first $100 million of the Portfolio’s assets, 0.41% on the next $100 million, 0.39% on the next $300 million, and 0.38% on assets in excess of $500 million. FIAM began providing sub-advisory services to the International Growth Portfolio as of July 31, 2015. As of December 31, 2024, FIAM had approximately $270.25 billion in assets under management.

J.P. Morgan Investment Management Inc (“JPMIM”), 383 Madison Avenue, New York, NY 10179, provides investment services to the Large Cap Blend and Mid Cap Growth Portfolios pursuant to an investment sub-advisory agreement. JPMIM is a wholly-owned subsidiary of JPMorgan Asset Management Holdings Inc., which is a wholly-owned subsidiary of JPMorgan Chase & Co., a bank holding company. For the services provided for the Large Cap Blend Portfolio, Mason Street Advisors pays JPMIM a fee at the annual rate of 0.30% on the first $100 million of the Portfolio’s assets, 0.20% on the next $500 million, and 0.18% on assets in excess of $600 million. or the services provided for the Mid Cap Growth Stock Portfolio, Mason Street Advisors pays JPMIM at the annual rate of 0.31% on the Portfolio’s net assets. As of December 31, 2024, assets under management were $3.5 trillion.

Loomis, Sayles & Company, L.P. (“Loomis Sayles”), One Financial Center, Boston, Massachusetts 02111, provides investment services to the Focused Appreciation Portfolio, pursuant to an investment sub-advisory agreement. Loomis Sayles is a Delaware limited partnership. Loomis Sayles’ sole general partner, Loomis, Sayles & Company, Inc. is directly owned by Natixis Investment Managers, LLC (“Natixis LLC”). Natixis LLC is an indirect subsidiary of Natixis Investment Managers, an international asset management group based in Paris, France, that is in turn owned by Natixis, a French investment banking and financial services firm. Natixis is wholly owned by BPCE, France’s second largest banking group. BPCE is owned by banks comprising two autonomous and complementary retail banking

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networks consisting of the Caisse d’Epargne regional savings banks and the Banque Populaire regional cooperative banks. The registered address of Natixis is 30, avenue Pierre Mendès France, 75013 Paris, France. The registered address of BPCE is 50, avenue Pierre Mendès France, 75013 Paris, France. Founded in 1926, Loomis Sayles is one of the oldest investment advisory firms in the United States. For the services provided on behalf of the Focused Appreciation Portfolio, Mason Street Advisors pays Loomis Sayles at the annual rate of 0.34% on the first $500 million of the Portfolio’s assets and 0.33% on assets in excess of $500 million. Loomis Sayles began providing sub-advisory services to the Focused Appreciation Portfolio as of July 31, 2015. As of December 31, 2024, Loomis Sayles had $389.3 billion in assets under management.

Massachusetts Financial Services Company (“MFS®2”), 111 Huntington Avenue, Boston, Massachusetts 02199, provides investment advisory services to the Research International Core Portfolio. MFS is America’s oldest mutual fund organization. MFS and its predecessor organizations have a history of money management dating from 1924. MFS® is a subsidiary of Sun Life of Canada (U.S.) Financial Services Holdings, Inc., which in turn is an indirect majority-owned subsidiary of Sun Life Financial Inc., a diversified financial services company. For services provided to the Research International Core Portfolio, Mason Street Advisors pays MFS a fee at an annual rate of 0.45% on the first $250 million, 0.40% on the next $250 million, and 0.35% on assets in excess of $500 million. As of December 31, 2024, net assets under the management of the MFS organization were approximately $605 billion.

Northern Trust Investments, Inc. (“Northern Trust”), 50 South LaSalle Street, Chicago, Illinois 60603, an indirect subsidiary of Northern Trust Corporation, provides investment services to the Index 400 Stock and Index 600 Stock Portfolios pursuant to investment sub-advisory agreements. Northern Trust is an Illinois State Banking Corporation and an investment adviser registered under the Investment Advisers Act of 1940, as amended. It primarily manages assets for institutional and individual separately managed accounts, investment companies and bank common and collective funds. For the services provided for the Index 400 Stock Portfolio, Mason Street Advisors pays Northern Trust a fee at the annual rate of 0.0275% of the Portfolio’s net assets on the first $1 billion and 0.015% on assets over $1 billion. For the services provided for the Index 600 Stock Portfolio, Mason Street Advisors pays Northern Trust a fee at the annual rate of 0.04% of the Portfolio’s net assets on the first $500 million, and 0.03% on assets over $500 million. As of December 31, 2024, assets under management were $1.3 trillion.

Pacific Investment Management Company LLC (“PIMCO”), 650 Newport Center Drive, Newport Beach, California 92660, provides investment advisory services to the Multi-Sector Bond Portfolio and the Long-Term U.S. Government Bond Portfolio. PIMCO is a majority owned subsidiary of Allianz Asset Management of America LLC (“Allianz Asset Management”) with a minority interest held by Allianz Asset Management U.S. Holding II LLC, each, a Delaware limited liability company, and by certain current and former officers of PIMCO. Allianz Asset Management was organized as a limited liability company under Delaware law in 2000. Allianz Asset Management of America LP merged with Allianz Asset Management, with the latter being the surviving entity, effective January 1, 2023. Following the merger, Allianz Asset Management is PIMCO LLC’s managing member and direct parent entity. Through various holding company structures, Allianz Asset Management is majority owned by Allianz SE. Allianz SE is a European based, multinational insurance and financial services holding company and a publicly traded German company. The management and operational oversight of Allianz Asset Management is carried out by its Management Board, the sole member of which is currently Tucker J. Fitzpatrick. PIMCO provides investment services to the Multi-Sector Bond Portfolio and the Long-Term U.S. Government Bond Portfolio pursuant to our investment sub-advisory agreement. For services provided to the Multi-Sector Bond Portfolio, Mason Street Advisors pays PIMCO at the annual rate of 0.45% on the first $500 million of the Portfolio’s net assets and 0.35% on net assets in excess of $500 million. For services provided to the Long-Term U.S. Government Bond Portfolio, Mason Street Advisors pays PIMCO at the annual rate of 0.225% of the Portfolio’s net assets. As of December 31, 2024, assets under management were approximately $1.86 trillion, including $1.95 trillion in third-party client assets.

T. Rowe Price Associates, Inc. (“TRPA”), 100 East Pratt Street, Baltimore, Maryland 21202, provides investment services to the Equity Income Portfolio, the Short-Term Bond Portfolio, and the Growth Stock Portfolio pursuant to investment sub-advisory agreements. For services provided to the Equity Income Portfolio, Mason Street Advisors pays TRPA 0.475% on the first $50 million of the Portfolio’s assets, reduced to 0.425% on the next $50 million. The sub-advisory fee is reset to 0.375% of the Portfolio’s average net assets at $100 million, to 0.325% at

2 MFS® is a registered trademark of Massachusetts Financial Services Company.

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$200 million, to 0.30% at $500 million and is 0.275% on assets from $500 million to $1 billion. The sub-advisory fee is reset to 0.275% of the Portfolio’s average net assets at $1 billion and is reset to 0.25% at $1.5 billion. TRPA will provide Mason Street Advisors with a transitional fee credit to eliminate any discontinuity between the tiered fee schedule and the flat fee schedule once assets exceed certain amounts. For the services provided for the Short-Term Bond Portfolio, Mason Street Advisors pays TRPA 0.18% on the first $50 million of the Portfolio’s assets, reduced to 0.15% on the next $50 million. The sub-advisory fee is reset to 0.15% of the Portfolio’s average net assets at $100 million, reset to 0.125% at $250 million and reset at 0.115% at $500 million. The sub-advisory fee is 0.10% on assets in excess of $500 million and is reset to 0.10% at $1 billion in assets. TRPA will provide Mason Street Advisors with a transitional fee credit to eliminate any discontinuity between the tiered fee schedule and the flat fee schedule once assets exceed certain amounts. For the services provided for the Growth Stock Portfolio, Mason Street Advisors pays TRPA a fee at the annual rate of 0.50% of the Portfolio’s net assets on the first $50 million of assets, reduced to 0.40% on the next $50 million. The sub-advisory fee is reset to 0.40% of the Portfolio’s average net assets at $100 million. The sub-advisory fee is reset to 0.33% on assets at $200 million, and to 0.325% at $500 million. The sub-advisory fee is reset to 0.30% of the Portfolio’s average net assets at $1 billion. The sub-advisory fee is reduced to 0.29% from $1 billion to $2 billion and reduced to 0.275% over $3 billion. TRPA will provide Mason Street Advisors with a transitional fee credit to eliminate any discontinuity between the tiered fee schedule and instances where the schedule provides for a flat fee. A fee discount may apply based on the aggregated annual fees paid on assets managed by TRPA for the Fund. TRPA is a wholly owned subsidiary of T. Rowe Price Group, Inc., a publicly traded financial services holding company. As of December 31, 2024, assets under management were approximately $1.61 trillion.

T. Rowe Price Investment Management, Inc. (“TRPIM”), 100 East Pratt Street, Baltimore, Maryland 21202, provides investment services to the Small Cap Value Portfolio pursuant to an investment sub-advisory agreement. For the services provided for the Small Cap Value Portfolio, Mason Street Advisors pays TRPIM a fee at the annual rate of 0.60% of the Portfolio’s net assets on the first $500 million of assets and 0.55% on assets over $500 million. TRPIM is a wholly owned subsidiary of T. Rowe Price Associates, Inc., an investment management firm and wholly owned subsidiary of T. Rowe Price Group, Inc., a publicly traded financial services holding company. As of December 31, 2024, assets under management were approximately $1.61 trillion.

Wellington Management Company LLP (“Wellington Management”) is a Delaware limited liability partnership with principal offices at 280 Congress Street, Boston, Massachusetts 02210, and serves as sub-adviser to the Small Cap Growth Stock Portfolio, and the Large Cap Core Stock Portfolio. Wellington Management is a professional investment counseling firm which provides investment services to investment companies, employee benefit plans, endowments, foundations, and other institutions. Wellington Management and its predecessor organizations have provided investment advisory services for over 90 years. Wellington Management is owned by the partners of Wellington Management Group LLP, a Massachusetts limited liability partnership. For services to the Small Cap Growth Stock Portfolio, Mason Street Advisors pays Wellington Management a fee based on the average daily net assets of the Portfolio at the following rates: 0.40% on the first $150 million of assets, 0.37% on the next $150 million, and 0.35% on assets over $300 million. For services provided to the Large Cap Core Stock Portfolio, Mason Street Advisors pays Wellington Management a fee based on the average daily net assets of the Portfolio at the following rates: 0.18% on the first $250 million of assets, 0.16% on the next $750 million and 0.15% on assets over $1 billion. As of December 31, 2024, Wellington Management had investment management authority with respect to approximately $1.24 trillion in assets.

Northwestern Mutual is the licensee under three License Agreements with Standard & Poor’s, dated as of November 30, 1990, February 19, 1999, and April 27, 2007, for the S&P 500® Index, the S&P® MidCap 400 Index, and the S&P® Small Cap 600 Index, respectively, relating to the Fund. The following disclaimers and limitations are included in accordance with the requirements of the License Agreements:

The Fund is not sponsored, endorsed, sold, or promoted by Standard & Poor’s (“S&P®”), a division of The McGraw-Hill Companies, Inc., and none of the Portfolios of the Fund is so sponsored, endorsed, sold, or promoted. S&P® makes no representation or warranty, express or implied, to the owners of the Fund or any of its Portfolios or any member of the public regarding the advisability of investing in securities generally or in the Fund or any of its Portfolios particularly or the ability of the S&P 500® Index, the S&P® MidCap 400 Index or the S&P® Small Cap 600 Index to track general stock market performance. S&P®’s only relationship to the Licensee is the licensing of certain trademarks and trade names of S&P® and of the S&P 500® Index, the S&P® MidCap 400 Index and the S&P® Small Cap 600 Index, each of which are determined, composed and calculated by S&P® without regard to the Licensee or the Fund. S&P® has no obligation to take the needs of the Licensee or the owners of the Fund or any of its Portfolios into consideration in

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determining, composing, or calculating the S&P 500® Index, the S&P® MidCap 400 Index or the S&P® Small Cap 600 Index. S&P® is not responsible for and has not participated in the determination of the timing of, prices at, or quantities of the Fund or any of its Portfolios to be issued or in the determination or calculation of the equation by which the Fund or any of its Portfolios is to be converted into cash. S&P® has no obligation or liability in connection with the administration, marketing, or trading of the Fund.

S&P® DOES NOT GUARANTEE THE ACCURACY AND/OR THE COMPLETENESS OF THE S&P 500® INDEX, THE S&P® MIDCAP 400 INDEX OR THE S&P® SMALL CAP 600 INDEX OR ANY DATA INCLUDED THEREIN AND S&P® SHALL HAVE NO LIABILITY FOR ANY ERRORS, OMISSIONS, OR INTERRUPTIONS THEREIN. S&P® MAKES NO WARRANTY, EXPRESS OR IMPLIED, AS TO RESULTS TO BE OBTAINED BY LICENSEE, OWNERS OF THE FUND, OR ANY OTHER PERSON OR ENTITY FROM THE USE OF THE S&P 500® INDEX, THE S&P® MIDCAP 400 INDEX OR THE S&P® SMALL CAP 600 INDEX OR ANY DATA INCLUDED THEREIN. S&P® MAKES NO EXPRESS OR IMPLIED WARRANTIES, AND HEREBY EXPRESSLY DISCLAIMS ALL WARRANTIES OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE WITH RESPECT TO THE S&P 500® INDEX, THE S&P® MIDCAP 400 INDEX OR THE S&P® SMALL CAP 600 INDEX OR ANY DATA INCLUDED THEREIN. WITHOUT LIMITING ANY OF THE FOREGOING, IN NO EVENT SHALL S&P® HAVE ANY LIABILITY FOR ANY SPECIAL, PUNITIVE, INDIRECT, OR CONSEQUENTIAL DAMAGES (INCLUDING LOST PROFITS), EVEN IF NOTIFIED OF THE POSSIBILITY OF SUCH DAMAGES.

Custodian and Fund Accountant

State Street Bank and Trust Company, 1 Iron Street, Boston, MA 02110 serves as the Fund's custodian. The custodian maintains custody of securities and other assets of the respective Portfolios and performs certain services in connection with the purchase, sale, exchange and pledge of securities of the Portfolios.

State Street Bank and Trust Company also serves as the fund accountant, providing pricing and valuation services with respect to securities and other investments of each Portfolio, and related services to the Fund.

Independent Registered Public Accounting Firm

PricewaterhouseCoopers LLP, 833 E. Michigan Street, Suite 1200, Milwaukee, WI, 53202, is the independent registered public accounting firm for the Fund and performs auditing and tax services for the Fund.

PORTFOLIO MANAGERS

Information regarding the Fund’s portfolio managers, including other accounts managed, compensation, ownership of Fund shares, and possible conflicts of interest, is set forth in Appendix D.

LEGAL PROCEEDINGS

Any material pending legal proceedings to which the Fund is a party, or to which Mason Street Advisors or a Sub-Advisor is a party that may have a material adverse effect on the Fund, is disclosed in the Fund’s prospectus. From time to time, each Sub-Adviser may be subject to certain routine legal and regulatory proceedings.

PROXY VOTING POLICIES AND PROCEDURES

The directors of the Fund have delegated to the Adviser and the Sub-Advisers the authority to vote all proxies relating to the Portfolios’ portfolio securities in accordance with the policies and procedures adopted by the Adviser and the respective Sub-Advisers. These policies and procedures, or summaries thereof, are set forth in Appendix F. Copies of the Fund’s proxy voting record for the most recent 12-month period ended June 30, when available, may be obtained, without charge, by calling (866) 910-1232, and on the SEC’s internet site at http://www.sec.gov.

PORTFOLIO TRANSACTIONS AND BROKERAGE ALLOCATION AND OTHER PRACTICES

Fixed income securities are generally purchased from the issuer or a primary market maker acting as principal for the securities on a net basis, with no brokerage commission being paid by the Fund, although the price usually includes undisclosed compensation. Transactions placed through dealers serving as primary market makers reflect the spread between the bid and ask prices. Securities may also be purchased from underwriters at prices which include underwriting fees. Transactions on U.S. stock exchanges, U.S. over-the-counter (“OTC”) markets and other agency

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transactions involve the payment by the Fund of negotiated brokerage commissions. Such commissions vary among different brokers. Also, a particular broker may charge different commissions according to such factors as the difficulty and size of the transaction. In the case of securities traded on some foreign stock exchanges, brokerage commissions may be fixed and the investment adviser or sub-adviser may be unable to negotiate commission rates for these transactions. Other transactions may be effected in the OTC market. There is generally no stated commission in the case of securities traded in foreign OTC markets, but the price of securities traded in these markets includes an undisclosed commission or mark-up.

In executing transactions for the purchase or sale of portfolio securities on behalf of the Fund, the investment adviser, or sub-adviser in the case of the Portfolios for which sub-advisers have been retained, will attempt to obtain “best execution” for the Portfolio - the best combination of transaction execution services, taking into account factors such as commissions, bid/ask spreads and the services and products to be provided by the broker or dealer, with the view of maximizing value for the Fund and other advisory clients. In effecting purchases and sales of portfolio securities for the account of the Fund, the investment adviser or sub-adviser may pay a higher commission rate than the lowest available rate when the investment adviser or sub- adviser believes it is reasonable to do so in light of the value of the brokerage and research services provided by the broker effecting the transaction. The determination and evaluation of the reasonableness of the brokerage commissions paid are based to a large degree on the professional opinions of the persons within the trading department of the manager responsible for placement and review of the transactions. These opinions are based on the experience of these individuals in the securities industry and information available to them about the level of commissions being paid by other institutional investors.

Some securities considered for investment by the Fund’s Portfolios may also be appropriate for other clients served by the investment adviser or sub-adviser. Overall, each portfolio manager is required to strive for a fair and equitable allocation of securities transactions among his or her accounts. Such allocation decisions are made for each client individually, based on the characteristics of the particular security and “Investment Considerations” of each client, as well for all clients collectively. Investment Considerations is a broad term that includes, but is not limited to, the client’s investment objectives and restrictions, current securities positions, cash available for investment or liquidity needs, and similar factors. Contemporaneous client trades in the same security will generally be aggregated into a single order if the terms are the same, provided the adviser or sub-adviser’s traders believe that aggregation is consistent with the duty to seek best execution. In some cases this procedure could have a detrimental effect on the price or volume of the security so far as a Portfolio is concerned.

As permitted by Section 28(e) of the Securities Exchange Act of 1934, the investment adviser or sub-adviser may cause a Portfolio it advises to pay certain broker-dealers more than the lowest commission rate in order to receive services that relate to the execution of securities transactions (“Brokerage Services”) and advice, analyses or reports within the meaning of Section 28(e) (“Research Services”), if the investment adviser or sub- adviser determines in good faith that the amount paid is reasonable in relation to the value of the Brokerage and Research Services it receives. This may be viewed in terms of either the particular transaction or the investment adviser or sub-adviser’s overall responsibilities to its client accounts over which it exercises investment discretion. Consistent with this practice, the investment adviser or sub-adviser may receive Brokerage and Research Services from many broker-dealers with which the investment adviser or sub-adviser places portfolio transactions. Research provided can be either proprietary (created and provided by the broker-dealer, including tangible research products as well as access to analysts and traders) or third-party (created by a third party but provided by the broker-dealer). The investment adviser or sub-adviser would, through the use of these Research Services, avoid the additional expenses which would be incurred if it should attempt to develop comparable information through its own staff.

These services, which in some cases may also be purchased for cash, include supplying information about particular companies, markets, or countries, statistical data, quotations and other securities pricing information, evaluations of securities, recommendations as to the purchase or sale of securities and other information that provides lawful and appropriate assistance to the manager in the performance of its investment decision-making responsibilities. Research Services provided by broker-dealers are not necessarily utilized for the specific account that generated commissions to the broker-dealer providing such Research Services. Some clients, including fixed income clients, may benefit from the Research Services despite the fact that their brokerage commissions may not be used to pay for those Research Services.

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By their nature, certain products or services may be used for both eligible and ineligible research and brokerage purposes. When a product or service has a mixed use, the investment adviser or sub-adviser may use client commissions to pay for the portion of the product or service that constitutes eligible research or brokerage provided the predominant use is eligible. In such event, the investment adviser or sub-adviser will make a reasonable allocation of the cost of the product or service according to its use, will use client commissions to pay for the portion of the product or service that is eligible under Section 28(e), and will pay for the remaining cost of the product or service with its own monies.

The investment adviser or sub-adviser may enter into client commission arrangements with certain broker-dealers under which the investment adviser or sub-adviser may use client commissions to pay for Research Services provided by an entity other than the executing broker-dealer, including third party broker-dealers and non-broker research providers. Under such arrangements, the executing broker sets aside a portion of the commission paid for the purpose of providing the investment adviser or sub-adviser with certain services that are eligible under Section 28(e).

During the years ended December 31, 2022, 2023 and 2024, each Portfolio paid the following brokerage commissions on agency transactions:

Portfolio Name	2024	2023	2022
Growth Stock Portfolio	$14,427	$24,172	$37,117
Focused Appreciation Portfolio	84,230	70,994	80,685
Large Cap Core Stock Portfolio	175,872	172,710	135,078
Large Cap Blend Portfolio	31,660	95,845	52,838
Index 500 Stock Portfolio	26,680	30,300	29,224
Large Company Value Portfolio	26,753	25,020	29,562
Domestic Equity Portfolio	170,226	107,265	104,151
Equity Income Portfolio	75,878	82,494	85,214
Mid Cap Growth Stock Portfolio	536,398	237,376	386,213
Index 400 Stock Portfolio	9,527	3,561	5,924
Mid Cap Value Portfolio	164,277	153,113	184,399
Small Cap Growth Stock Portfolio	415,128	339,169	315,958
Index 600 Stock Portfolio	2,743	6,906	9,172
Small Cap Value Portfolio	244,467	209,296	200,067
International Growth Portfolio	355,976	272,705	218,767
Research International Core Portfolio	161,402	84,191	154,662
International Equity Portfolio	380,827	283,281	221,791
Emerging Markets Equity Portfolio	576,935	297,495	441,341
Government Money Market Portfolio	0	0	0
Short-Term Bond Portfolio	8,181	7,634	6,283
Select Bond Portfolio	0	0	0
Long-Term U.S. Government Bond Portfolio	6,616	6,052	4,149
Inflation Managed Portfolio	5,012	12,581	7,961
High Yield Bond Portfolio	231	813	99
Multi-Sector Bond Portfolio	22,519	27,425	34,451
Active/Passive Moderate Portfolio	10,478	2,544	4,645
Active/Passive Balanced Portfolio	77,844	15,181	32,428

There are no broker-dealers affiliated with the Fund, or affiliates of an affiliate of the Fund that received brokerage commissions from the Fund during its last three fiscal years. From time to time, there may be a commission paid to a brokerage firm that acts as a clearing broker on behalf of (and designated by) an executing broker utilized by the sub-adviser to a Portfolio, and such clearing broker may be affiliated with the sub-adviser.

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The chart below identifies each Portfolio’s “regular brokers or dealers” the securities of which were purchased by a Portfolio during the fiscal year ended December 31, 2024, and the value each Portfolio held of such securities as of December 31, 2024. Where a value is listed as zero, the Portfolio did not hold any securities of the indicated broker-dealer as of December 31, 2024. Where the table indicates “N/A,” either the broker was not a “regular broker or dealer” of the Portfolio or the Portfolio did not purchase securities of the broker or dealer during 2024 (though the Portfolio may have held as of December 31, 2024 securities of the indicated broker or dealer that were acquired in prior years). The values and transactions include money market instruments issued by the broker-dealer. If a Portfolio is not listed in the chart below, it did not purchase the securities of its “regular brokers or dealers” during 2024. The dollar values in the chart below are in thousands.

The term “regular broker or dealer” means (i) one of the ten brokers or dealers that received the greatest dollar amount of brokerage commissions by virtue of direct or indirect participation in the Portfolio’s portfolio transactions during the year ended December 31, 2024, (ii) one of the ten brokers or dealers that engaged as principal in the largest dollar amount of portfolio transactions of the Portfolio during the year ended December 31, 2024, or (iii) one of the ten brokers or dealers that sold the largest dollar amount of securities of the Portfolio during the year ended December 31, 2024.

Broker	Growth Stock	Focused Appreciation	Large Cap Core Stock	Large Cap Blend	Index 500 Stock	Large Company Value
Goldman Sachs	6,538	N/A	N/A	N/A	N/A	N/A
JPMorgan Chase	N/A	N/A	N/A	N/A	N/A	5,699
Morgan Stanley	6,828	N/A	N/A	1,837	N/A	N/A

Broker	Domestic Equity	Equity Income	Mid Cap Growth	Index 400 Stock	Mid Cap Value	Small Cap Growth Stock
Bank of America	31,644	7,599	N/A	N/A	N/A	N/A
Citigroup	N/A	10,890	N/A	N/A	N/A	N/A
Jefferies	N/A	N/A	8,113	N/A	N/A	N/A
JPMorgan Chase	N/A	11,832	N/A	N/A	N/A	N/A
Sanford C. Bernstein	N/A	N/A	N/A	N/A	2,698	N/A

Broker	Index 600 Stock	Small Cap Value	International Growth	Research International Core	International Equity	Emerging Markets Equity
UBS Securities	N/A	N/A	20,684	N/A	52,571	N/A

Broker	Government Money Market	Short-Term Bond	Select Bond	Long-Term U.S. Government Bond	Inflation Managed	High Yield Bond
Bank of America	N/A	N/A	16,402	N/A	335	N/A
Bank of Montreal	30,000	N/A	0	N/A	N/A	N/A
Barclays	N/A	783	521	0	0	N/A
BNP Paribas	25,000	N/A	N/A	0	N/A	N/A
Citigroup	25,000	2,408	12,000	22,400	2,569	N/A
Deutsche Bank	N/A	N/A	N/A	17,500	N/A	N/A
Goldman Sachs	20,000	N/A	22,462	0	N/A	N/A
HSBC	N/A	N/A	3,848	N/A	N/A	N/A
JPMorgan Chase	N/A	4,101	17,221	0	14,891	N/A
Mizuho	25,000	N/A	N/A	N/A	N/A	N/A
Morgan Stanley	15,000	N/A	34,416	N/A	0	N/A
MUFG Securities Americas	16,000	N/A	N/A	N/A	N/A	N/A

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Broker	Government Money Market	Short-Term Bond	Select Bond	Long-Term U.S. Government Bond	Inflation Managed	High Yield Bond
Natixis North America	15,000	N/A	N/A	N/A	N/A	N/A
Scotia Capital	20,000	N/A	N/A	N/A	N/A	N/A
TD Securities	24,000	N/A	N/A	N/A	N/A	N/A
Wells Fargo	N/A	1,627	31,254	N/A	296	N/A

Broker	Multi-Sector Bond	Active/ Passive Moderate	Active/ Passive Balanced
Bank of America	5,138	N/A	N/A
Barclays	4,081	N/A	N/A
BNP Paribas	2,659	N/A	N/A
CIBC	0	N/A	N/A
Citigroup	65,509	N/A	N/A
Deutsche Bank	1,864	N/A	N/A
Goldman Sachs	5,672	N/A	N/A
JPMorgan Chase	9,486	N/A	N/A
Morgan Stanley	13,777	N/A	N/A
Scotia Capital	13,913	N/A	N/A

DISCLOSURE OF PORTFOLIO HOLDINGS

The directors of the Fund have adopted a Policy on Disclosure of Portfolio Holdings and related procedures (the “Holdings Disclosure Policy and Procedures”) to govern the dissemination of portfolio holdings information. It is the policy of the Fund to disclose the holdings in its Portfolios only in compliance with applicable laws, rules and regulations, and in accordance with the Holdings Disclosure Policy and Procedures. It is also the policy of the Fund to disclose material non-public portfolio holdings information only where there is a legitimate business purpose for doing so and where there is a reasonable belief that the recipient will keep the information confidential and use it only for the purposes for which it was provided. The Fund has directed its adviser and sub-advisers to adhere to the Holdings Disclosure Policy and Procedures. The Fund reserves the right to amend the Holdings Disclosure Policy and Procedures at any time and from time to time, without prior notice, in its sole discretion.

The procedures applicable to disclosure of portfolio holdings vary depending on whether or not the information to be disclosed is publicly available. Information regarding a Portfolio’s sector or industry weightings and other investment portfolio characteristics that does not refer to specific securities by name is not subject to the Holdings Disclosure Policy and Procedures.

Disclosure of Publicly Available Holdings Information

Once specific holdings information of a Portfolio is disclosed on the SEC’s website, Northwestern Mutual’s website, or the Fund’s website, as described below, the information is considered readily accessible and publicly available for purposes of the Holdings Disclosure Policy and Procedures. Internet disclosure of a Portfolio’s holdings is made available to all categories of persons, including individual and institutional investors, intermediaries, third-party service providers, rating and ranking organizations and affiliated persons of the Fund.

A full list of each Portfolio’s holdings as of the end of each of the Fund’s fiscal quarters is made publicly available on the SEC website (www.sec.gov). Holdings information for each Portfolio as of the last business day, or last calendar day, of the first and third quarters of the Fund’s fiscal year is filed with the SEC on Form N-PORT. The Fund normally files Form N-PORT within 60 days after the applicable fiscal quarter end. Holdings information for each Portfolio as of the end of the second and fourth quarters of the Fund’s fiscal year is filed with the SEC on Form N-CSR. The Fund normally files Form N-CSR within 10 days after the Fund transmits its annual and semi-annual reports to

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shareholders. After filing with the SEC, the Fund’s regulatory documents are posted to the Fund’s website (www.nmseriesfund.com). Each Portfolio’s complete holdings information is also available semi-annually in the Fund’s annual and semi-annual reports to shareholders.

For each Portfolio (except the Government Money Market Portfolio), a list of the ten largest holdings, the percentage of Portfolio net assets that each such holding represents, and a list of each Portfolio’s full holdings, as of the most recent calendar-quarter end, is normally posted on Northwestern Mutual’s website (www.northwesternmutual.com). The Government Money Market Portfolio’s portfolio holdings, dollar-weighted average maturity, and weighted average life are normally posted five days after the end of each month and remain posted for at least six months thereafter; additionally, six-month historical data regarding asset flows, shadow prices, and daily and weekly liquid assets are posted. The information may be viewed by following one of the paths below and selecting the specific Portfolio you wish to view:

•

Life Insurance –https://www.northwesternmutual.com/life-insurance/variable-universal-life-insurance-vul/underlying-fund-information/; or

•

Annuities – https://www.northwesternmutual.com/fixed-annuity-vs-variable-annuity/underlying-fund-information/

The Fund may from time to time withhold posting to, or remove from, the Northwestern Mutual website any portion of this information with respect to a Portfolio.

The Holdings Disclosure Policy and Procedures provide that the Fund and its service providers may disclose all or part of a Portfolio’s holdings at any time after the information is publicly available or readily accessible, provided that:

•

the information disclosed is accurate and presented in a manner that is not deceptive or misleading;

•

the information disclosed is limited to the holdings information contained in a filing with the SEC, posted on Northwestern Mutual’s website, or posted on the Fund’s website; and

•

no fees or other compensation are received by the Fund, its service providers or any of their employees from recipients of the holdings data directly as compensation for the disclosure of the holdings information.

In addition to disclosing holdings information in SEC filings and on the websites as described above, the Fund is authorized to disclose or cause to be disclosed all or a portion of a Portfolio’s publicly available or readily accessible holdings information to rating agencies and other information organizations that rate or rank investment companies or that collect and report other statistical data on investment companies, in marketing and sales literature, marketing presentations and the website, and in communications to individual and institutional investors, regardless of the size of their account, including shareholders, contract owners, participants, annuitants and beneficiaries.

Disclosure of Non-Public Holdings Information

Disclosure of a Portfolio’s material holdings prior to the holdings information becoming publicly available is limited to the situations described below. The Holdings Disclosure Policy and Procedures prohibit the Fund, its service providers and their employees from receiving compensation for the disclosure of holdings information from recipients of the holdings data. The Holdings Disclosure Policy and Procedures authorize the following disclosures of Fund holdings information that is not publicly available.

Service Providers. Holdings data may be disclosed to and utilized by the service providers of the Fund, Mason Street Advisors and the sub-advisers (“Service Providers”) as necessary for them to provide the services that they have agreed directly or indirectly to provide, provided that there is a reasonable belief based on written confidentiality provisions, rules of their profession, or other circumstances, that the recipient organizations will keep the information confidential (i.e., not disclose it to third parties) and use it only for the purposes for which it was provided. The frequency with which holdings information may be disclosed to Service Providers, and the length of the lag, if any, between the date of the information and the date of the disclosure, is determined by the Fund, Mason Street Advisors, and/or the applicable sub-advisers, as the case may be, based on the needs of the Service Provider for such information and the risk of harm to the Fund and its shareholders. Sub-advisers are required to disclose to the Fund their Service Providers to whom they may provide material non-public holdings data for the Portfolios they manage, and are required

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to update that list during the year when changes occur. With respect to the Service Providers identified by a sub-adviser, the Fund has received assurances that their Service Providers are subject to a duty of confidentiality, which includes the duty not to trade on non-public information. In addition, each sub-adviser is requested to certify quarterly that they are in compliance with the Fund’s Holdings Disclosure Policy and Procedures. As of March 31, 2025, the Service Providers included those listed in Appendix G.

Regulators and Other Required Disclosures. Holdings data may be disclosed to regulators and exchanges at the request or as otherwise required by the foregoing, and may also be disclosed to third parties in circumstances required by law, rule or regulation or court order or subpoena.

Northwestern Mutual Separate Accounts. Holdings data may be disclosed to the Northwestern Mutual variable life insurance and variable annuity separate accounts that invest in shares of the Portfolios. Holdings data may also be disclosed to Northwestern Mutual and Northwestern Mutual Investment Services, LLC in their capacities as co-depositors for the Northwestern Mutual separate accounts.

Other. Material holdings information may be disclosed in other circumstances prior to the public availability or accessibility of such data only upon the approval of both the Fund’s CCO and another Fund officer, which approval will be based on compliance with the Holdings Disclosure Policy and Procedures, including obtaining from the recipient, where appropriate, a confidentiality agreement limiting their use of such data, requiring them to keep the data confidential, and stipulating that the data may not be used under any circumstances for the basis of trading.

Parties receiving non-public holdings data from the Fund or its investment advisers will be required to keep such data confidential in accordance with the Holdings Disclosure Policies and Procedures pursuant to confidentiality provisions in their service contracts, specific confidentiality agreements, duties of trust and confidence owed to the Fund (e.g., legal counsel) and/or specific directives from the Fund.

Monitoring Procedures

The Holdings Disclosure Policy and Procedures require the Fund’s CCO to: (i) monitor the procedures in place governing the disclosure and use of portfolio holdings information; (ii) report at least annually to the Board on their operation and any material changes to them; and (iii) periodically monitor the basis for the belief that Fund and Mason Street Advisors Service Providers who receive material non-public Fund holdings data will keep the information confidential.

The Board exercises oversight of disclosure of portfolio holdings information by: (i) overseeing the implementation and enforcement of the Holdings Disclosure Policy and Procedures, the Code of Ethics and other relevant compliance policies and procedures by the CCO of the Fund and its investment adviser; (ii) considering the annual compliance procedures report of the Fund’s CCO pursuant to Rule 38a-1 under the 1940 Act; and (iii) considering whether to approve or ratify any material amendments to the Holdings Disclosure Policy and Procedures.

Notwithstanding the above, there is no guarantee that the Holdings Disclosure Policy and Procedures will protect the Fund and contract and policy owners from potential misuse of holdings information by individuals or firms in possession of such information.

ORGANIZATION AND CAPITAL STOCK

The Fund was incorporated in Maryland on December 22, 1983.

The Fund issues a separate class of capital stock for each Portfolio. Each share of capital stock issued with respect to a Portfolio has a pro rata interest in the assets of that Portfolio and has no interest in the assets of any other Portfolio. Each share of capital stock is entitled to one vote on all matters submitted to a vote of shareholders. Shares of a Portfolio will be voted separately, however, on matters affecting only that Portfolio, including approval of the Agreement and changes in fundamental investment policies of a Portfolio. The assets of each Portfolio are charged with the liabilities of the Portfolio and their proportionate share of the general liabilities of the Fund based on the relative asset size of the Portfolios at the time the liabilities are incurred. All shares may be redeemed for cash at any time.

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All of the outstanding shares of each Portfolio are owned directly or indirectly by Northwestern Mutual. Shares of each Portfolio are presently being offered and sold only for funding variable annuity contracts and variable life insurance policies offered by Northwestern Mutual. The shares held in connection with the separate investment accounts are voted by Northwestern Mutual in accordance with instructions received from the owners of the variable annuity contracts and variable life insurance policies. The shares held by Northwestern Mutual as general assets are voted by Northwestern Mutual in the same proportions as the shares held in connection with these separate investment accounts. If applicable laws, regulations or interpretations change so as to permit Northwestern Mutual to vote the Fund shares in its own discretion, it may elect to do so.

As stated above, the shares of the Fund are offered to separate investment accounts to fund both variable life insurance policies and variable annuity contracts. Because of differences in tax treatment or other considerations it is possible that the interests of variable life insurance policyowners, owners of variable annuity contracts or owners of other contracts that may participate in the Fund in the future might at some time be in conflict. The Board will monitor for any material conflicts and determine what action, if any, should be taken. Northwestern Mutual has agreed to be responsible, at its cost, to remedy or eliminate any irreconcilable material conflict up to and including establishing a new registered management investment company and segregating the assets underlying the variable annuity contracts and variable life insurance policies.

The capital stock of the Fund is divided into twenty-seven classes corresponding to the twenty-seven Portfolios of the Fund. Each class is preferred over the other classes with respect to the assets of the portfolio to which the class relates. Dividends and distributions, including distributions in the event of liquidation, are payable only out of assets of the portfolio to which the class relates. All shares of the Fund are entitled to vote on all matters submitted to a vote of the shareholders except that shares shall be voted by class on matters concerning only that class, to approve an investment advisory agreement, to approve changes in fundamental policies with respect to that class and when otherwise required by the 1940 Act. Shares may be redeemed only for cash, except that capital stock of any class may be redeemed in kind with assets of the Portfolio to which the class relates if the directors deem such action desirable. Each share is nonassessable and shareholders have no preemptive or conversion rights.

Each Portfolio is a diversified series of the Fund, except for the Focused Appreciation Portfolio, which is non-diversified. The Fund is an open- end management investment company.

PURCHASE, REDEMPTION AND PRICING OF SHARES

Shares of each Portfolio are offered and redeemed at their net asset value as next determined following receipt of a purchase order or tender for redemption without the addition of any selling commission or “sales load” or any redemption charge. The redemption price may be more or less than the shareholder’s cost.

Payment for the shares redeemed must be made within seven days after receipt of a redemption request in good order. The Fund typically expects to pay out redemption proceeds within two days following receipt of a redemption request in good order. The right to redeem Fund shares may be suspended, or payment of the redemption value postponed, during any period in which the New York Stock Exchange is closed or trading thereon is restricted, or any period during which an emergency exists, or as otherwise permitted by the 1940 Act.

The net asset value of each share of each Portfolio is the net asset value of the entire Portfolio divided by the number of outstanding shares of the Portfolio. The net asset value of an entire Portfolio is determined by computing the value of all assets of the Portfolio and deducting all liabilities, including reserves and accrued liabilities of the Portfolio. The net asset value is determined as of the close of trading on the New York Stock Exchange on each day during which the Exchange is open for trading.

The Government Money Market Portfolio will use its best efforts to maintain a constant net asset value per share of $1.00 (computed to an accuracy of $.005); however, the net asset value is subject to fluctuation based upon changes in the value of the Portfolio’s securities. Accordingly, if net losses on the Portfolio’s securities for a given period exceed income after expenses, the net asset value per share of Government Money Market Portfolio capital stock will decline. The Board may take such action as it considers appropriate to maintain the stability of the net asset value per share.

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For purposes of valuing securities held by a Portfolio, Section 2(a)(41) of the 1940 Act and Rule 2a-4 thereunder provide that securities for which market quotations are readily available are to be valued at market value and all other securities and assets are to be valued at fair value as determined in good faith by the Board. Rule 2a-5 under the 1940 Act provides that a market quotation is readily available only when that quotation is a quoted price (unadjusted) in active markets for identical investments that a fund can access at the measurement date, provided that a quotation will not be readily available if it is not reliable. This definition is consistent with the definition of a Level 1 valuation in the fair value hierarchy outlined in U.S. Generally Accepted Accounting Principles (“GAAP”). Securities and other Portfolio assets with readily available market quotations are priced at such market quotations, and all other securities and assets are fair valued in accordance with the requirements of Rule 2a-5.

The Board has designated the Adviser as valuation designee for the Fund and its Portfolios. As the valuation designee, the Adviser is responsible for the performance of fair value determinations and exercises primary and day-to-day operational responsibility for executing the fair valuation process. The Adviser has adopted valuation procedures and has appointed certain of its employees to carry out the Adviser’s responsibilities as valuation designee for the Fund. While the Board has designated the Adviser to perform these responsibilities, it will oversee the Adviser in its role as valuation designee.

Securities for Which Market Quotations are Readily Available

Portfolio securities for which market quotations are readily available are valued at current market value.

Equity securities for which market quotations are readily available are valued at the last sale or official closing price on the primary market or exchange on which they are traded as reported by a third-party pricing service. In the event there were no sales during the day or closing prices are not available, securities are generally valued at the last quoted bid price. Unlisted equity securities are generally valued at the last sale price or closing bid price if no sale has occurred. Short positions of equity investments are valued in accordance with the same methodologies and procedures outlined above with respect to equity investments, except that when a last sale price or official closing price is unavailable, the latest ask price rather than the latest bid price will be used.

Futures contracts are generally valued at the closing settlement price on the exchange. Options contracts are valued at the last quoted sales price or, if there is no such reported sale, long positions are valued at the most recent quoted bid price, and short positions at the most recent quoted ask price.

If an asset or liability is valued in a currency other than U.S. dollars, its value is converted into U.S. dollars by multiplying the local currency value of the investment by the spot U.S. dollar exchange rate for such currency.

With respect to any portion of a Portfolio’s assets that are invested in one or more open-end management investment companies that are registered under the 1940 Act (other than ETFs), the Portfolio’s net asset value is calculated based on the net asset values of the registered open-end management companies in which the Portfolio invests. The prospectuses for these companies explain the circumstances under which those companies will use fair value pricing and the effects of using fair value pricing. ETFs are valued at the last sale price as reported by a third-party pricing service on the primary exchange on which they are traded.

Securities for Which Market Quotations are Not Deemed Readily Available Under Rule 2a-5

Debt securities are generally valued using evaluated prices based on accepted industry conventions obtained from third-party pricing services. Fair valuation procedures may be used under certain circumstances when pricing service valuations are not available or when the valuation designee determines the valuation does not reflect the debt security’s fair value. On any day a price is not available for a debt security with a remaining maturity of sixty days or less, such security may be fair valued by reference to the security’s amortized cost. Debt securities purchased on a “when issued” basis are valued at the security’s acquisition cost until a price from a pricing service becomes available, unless such security is not expected to become freely tradable promptly, in which case the security will be valued at its fair value as determined by the valuation designee.

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All debt securities of the Government Money Market Portfolio are valued on an amortized cost basis or, if the current market value differs substantially from the amortized cost, by marking to market. Under the amortized cost method of valuation, the security will initially be valued at the cost on the date of purchase; and thereafter the Portfolio will assume a constant proportionate amortization in value of any discount or premium until maturity.

Derivatives other than futures and options contracts are valued at prices provided by pricing services or pursuant to the valuation designee’s fair valuation procedures. Swap contracts and other derivatives are valued at evaluated prices provided by the respective exchange, a pricing service or pursuant to the valuation designee’s fair valuation procedures.

Each equity security traded on a foreign market or exchange (other than those traded in Canada, Mexico, Central and South America) will be valued at its fair value by using a pricing model furnished by a third-party service rather than using the last closing price of such foreign security on its principal overseas market.

TAXES AND DIVIDENDS

Each Portfolio is qualified or intends to qualify as a regulated investment company under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”). Each Portfolio, except the Government Money Market Portfolio, will distribute net capital gains annually to ensure it qualifies for tax-free treatment of capital gains under Subchapter M of the Code. Net capital gains from the sale of investments will be calculated by subtracting any unused capital loss carryforward from net realized gain for the year, as prescribed by the Code.

To qualify as a regulated investment company, at the close of each quarter of the Portfolio’s taxable year, (i) at least 50% of the value of its total assets must be represented by cash and cash items, U.S. Government securities, securities of other regulated investment companies and securities of other issuers, with such securities of other issuers limited, in respect to any one issuer, to an amount that does not exceed 5% of the value of the Portfolio’s assets and that does not represent more than 10% of the outstanding voting securities of such issuer; and (ii) no more than 25% of the value of a Portfolio’s total assets may be invested in the securities of any one issuer (other than U.S. Government securities and securities of other regulated investment companies), or in two or more issuers (other than other regulated investment companies) which the Portfolio controls and which are engaged in the same or similar trades or businesses, or in one or more qualified publicly traded partnerships.

A regulated investment company must derive at least 90% of its gross income from dividends, interest, certain payments with respect to securities loans, gains from the sale or other disposition of stock, securities or foreign currencies or other income derived from its business of investing in such stock, securities or currencies. Under certain circumstances, a Portfolio may be required to sell portfolio holdings to meet this requirement.

If for any year a Portfolio does not qualify as a regulated investment company, all of its taxable income (including its net taxable gain) will be subject to tax at regular corporate rates without any deduction for distributions to shareholders.

No distribution of realized capital gains will be made until any capital loss carryforward has been exhausted. At the end of their last fiscal years, the following Portfolios had unused capital loss carryforwards. Amounts are in thousands.

Portfolio	Carryforward
Emerging Markets Equity Portfolio	106,529
Short-Term Bond Portfolio	13,833
Select Bond Portfolio	466,161
Long-Term US. Government Bond Portfolio	17,099
Inflation Managed Portfolio	27,523
High Yield Bond Portfolio	44,935
Multi-Sector Bond Portfolio	128,297

All other portfolios had no unused capital loss carryforwards.

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CALCULATION OF YIELD QUOTATIONS OF THE GOVERNMENT MONEY MARKET PORTFOLIO

The Government Money Market Portfolio’s yield is its current investment income expressed in annualized terms. The Portfolio’s yield is calculated by determining the net change in the value of a pre-existing account having a balance of one share at the beginning of a seven-day base period. The net change in the value of the account is divided by the value of the account at the beginning of the period to obtain the base period return. The result is then multiplied by 365 and divided by seven, with the resulting annualized yield carried to the nearest hundredth of one percent. For purposes of this calculation the net change in the value of the account reflects the value of additional Portfolio shares purchased with dividends from the original share and dividends declared on both the original share and any such additional shares. The calculation reflects net investment income of the Portfolio for the period, including accrued interest income plus or minus amortized purchase discount or premium, less all accrued expenses, but does not include realized or unrealized gains or losses.

FINANCIAL STATEMENTS

The financial statements, related notes and related report of PricewaterhouseCoopers LLP, independent registered public accounting firm, contained in the annual Certified Shareholder Report on Form N-CSR dated December 31, 2024 and for the year then ended are hereby incorporated by reference. Copies of the Fund’s Annual Report or, when it becomes available, Semi-Annual Report as of, and for the six months ended, June 30, 2025 (unaudited) or Form N-CSR may be obtained without charge by writing to The Northwestern Mutual Life Insurance Company, 720 East Wisconsin Avenue, Milwaukee, Wisconsin 53202, by calling (414) 271-1444, or by visiting the website at www.northwesternmutual.com.

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APPENDIX A – Credit Ratings

Description of Ratings as Provided by the Rating Services

As described in the prospectus, the Portfolios may invest in investment grade and non-investment grade debt investments. Investment grade securities are securities rated investment grade by a Nationally Recognized Statistical Rating Organization (“NRSRO”), (i.e. BBB- or higher by S&P Global or Baa3 or higher by Moody’s). Non-investment grade securities are securities rates below investment grade by a NRSRO. Below are summaries of the rating definitions used by three of the NRSROs. The Fund’s adviser will ordinarily rely on the ratings provided by these organizations but may give consideration to the ratings given by other NRSROs.

I. FITCH’S

a. Fitch’s Corporate Bonds and Preferred Stock (long-term)

Investment Grade

AAA

Highest credit quality. ‘‘AAA’ ratings denote the lowest expectation of default risk. They are assigned only in cases of exceptionally strong capacity for payment of financial commitments. This capacity is highly unlikely to be adversely affected by foreseeable events..

Very high credit quality. ‘AA’ ratings denote expectations of very low default risk. They indicate very strong capacity for payment of financial commitments. This capacity is not significantly vulnerable to foreseeable events.

High credit quality. ‘A’ ratings denote expectations of low default risk. The capacity for payment of financial commitments is considered strong. This capacity may, nevertheless, be more vulnerable to adverse business or economic conditions than is the case for higher ratings.

BBB

Good credit quality. ‘BBB’ ratings indicate that expectations of default risk are currently low. The capacity for payment of financial commitments is considered adequate, but adverse business or economic conditions are more likely to impair this capacity.

Speculative Grade

Speculative. ‘BB’ ratings indicate an elevated vulnerability to default risk, particularly in the event of adverse changes in business or economic conditions over time; however, business or financial flexibility exists that supports the servicing of financial commitments.

Highly speculative. ‘B’ ratings indicate that material default risk is present, but a limited margin of safety remains. Financial commitments are currently being met; however, capacity for continued payment is vulnerable to deterioration in the business and economic environment.

CCC

Substantial credit risk. ‘CCC’ ratings indicate very low margin for safety. Default is a real possibility.

Very high levels of credit risk. Default of some kind appears probable.

Near default. A default or default-like process has begun, or for a closed funding vehicle, payment capacity is irrevocably impaired.

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Restricted default. ‘RD’ ratings indicate an issuer that in Fitch Ratings’ opinion has experienced an uncured payment default or distressed debt exchange on a bond, loan or other material financial obligation, but has not entered into bankruptcy filings, administration, receivership, liquidation, or other formal winding-up procedure, and has not otherwise ceased operating.

Default. ‘D’ ratings indicate an issuer that in Fitch’s opinion has entered into bankruptcy filings, administration, receivership, liquidation or other formal winding-up procedure or that has otherwise ceased business and debt is still outstanding.

Default ratings are not assigned prospectively to entities or their obligations; within this context, non-payment on an instrument that contains a deferral feature or grace period will generally not be considered a default until after the expiration of the deferral or grace period, unless a default is otherwise driven by bankruptcy or other similar circumstance, or by a distressed debt exchange.

In all cases, the assignment of a default rating reflects the agency’s opinion as to the most appropriate rating category consistent with the rest of its universe of ratings and may differ from the definition of default under the terms of an issuer’s financial obligations or local commercial practice.

Distressed Debt Exchange

An exchange offer will be considered a Distressed Debt Exchange (DDE) if there is a material reduction in terms compared with the original contractual terms, and the exchange is conducted to avoid bankruptcy, similar insolvency or intervention proceedings, or a traditional payment default. The application of ratings due to a DDE event may be further explained in the relevant criteria.

b. Fitch’s Commercial Paper (short-term)

Highest short-term credit quality. Indicates the strongest intrinsic capacity for timely payment of financial commitments; may have an added ‘+’ to denote any exceptionally strong credit feature.

Good short-term credit quality. Good intrinsic capacity for timely payment of financial commitments.

Fair short-term credit quality. The intrinsic capacity for timely payment of financial commitments is adequate.

Speculative short-term credit quality. Minimal capacity for timely payment of financial commitments, plus heightened vulnerability to near term adverse changes in financial and economic conditions.

High short-term default risk. Indicates default is a real possibility.

Restricted default. Indicates an entity that has defaulted on one or more of its financial commitments, although it continues to meet other financial obligations. Typically applicable to entity ratings only.

Default. Indicates a broad-based default event for an entity, or the default of a short-term obligation.

Notes to Long-term and Short-term ratings: The modifiers “+” or “-” may be appended to a rating to denote relative status within major rating categories. Such suffixes are not added to ‘AAA’ ratings and ratings below the ‘CCC’ category.

Rating Watch: Ratings are placed on Rating Watch to notify investors that there is a heightened probability of a rating change and the likely direction of such change. These are designated as “Positive”, indicating a potential upgrade,

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“Negative”, for a potential downgrade, or “Evolving”, if ratings may be raised, lowered or maintained. Rating Watch is typically resolved over a relatively short period.

Rating Outlook: An Outlook indicates the direction a rating is likely to move over a one to two-year period. Outlooks may be positive, stable or negative. A Positive Rating Outlook indicates an upward trend on the rating scale. Conversely, a Negative Rating Outlook signals a negative trend on the rating scale. Positive or Negative Rating Outlooks do not imply that a rating change is inevitable, and similarly, ratings with Stable Outlooks can be raised or lowered without a prior revision to the Outlook. Occasionally, where the fundamental trend has strong, conflicting elements of both positive and negative, the Rating Outlook may be described as “Evolving.”

Program ratings assigned to corporate and public finance note issuance programs (e.g. medium-term not programs) relate only to standard issues made under the program concerned; it should not be assumed that these ratings apply to every issue made under the program.

Interest Only: Interest-only ratings are assigned to interest strips. These ratings do not address the possibility that a security holder might fail to recover some or all of its initial investment due to voluntary or involuntary principal repayments.

Principal Only: Principal-only ratings address the likelihood that a security holder will receive its initial principal investment either before or by the scheduled maturity date. These ratings do not address the possibility that a security holder may not receive some or all of the interest due.

‘PIF’: This action indicates that an issue has been paid in full. In covered bonds, PIF is only used when all issues of a program have been repaid.

‘NR’: This action is used when an issue has reached its redemption date and rating coverage is discontinued. This indicates that a previously rated issue has been repaid, but other issues of the same program (rated or unrated) may remain outstanding.

‘WD’: Indicates that the rating has been withdrawn and the issue or issuer is no longer rated by Fitch Ratings.

II. MOODY’S INVESTORS SERVICE, INC.

a. Moody’s Corporate Bonds and Preferred Stock (long-term)

Moody’s long-term ratings are opinions of the relative credit risk of financial obligations with an original maturity of one year or more. They address the possibility that a financial obligation will not be honored as promised. Such ratings use Moody’s Global Scale and reflect both the likelihood of default and any financial loss suffered in the event of default.

Aaa

Obligations rated Aaa are judged to be of the highest quality, with minimal credit risk.

Obligations rated Aa are judged to be of high quality and are subject to very low credit risk.

Obligations rated A are considered upper medium-grade and are subject to low credit risk

Baa

Obligations rated Baa are subject to moderate credit risk. They are considered medium-grade and as such may possess speculative characteristics.

Obligations rated Ba are judged to have speculative elements and are subject to substantial credit risk.

Obligations rated B are considered speculative and are subject to high credit risk.

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Caa

Obligations rated Caa are judged to be of poor standing and are subject to very high credit risk.

Obligations rated Ca are highly speculative and are likely in, or very near, default, with some prospect of recovery of principal and interest.

Obligations rated C are the lowest rated and are typically in default, with little prospect for recovery of principal or interest.

Note: Moody’s appends numerical modifiers 1, 2, and 3 to each generic rating classification from Aa through Caa. The modifier 1 indicates that the obligation ranks in the higher end of its generic rating category; the modifier 2 indicates a mid-range ranking; and the modifier 3 indicates a ranking in the lower end of that generic rating category.

b. Moody’s Commercial Paper (short-term)

Moody’s short-term ratings, unlike our long-term ratings, apply to an individual issuer’s capacity to repay all short-term obligations rather than to specific short-term borrowing programs.

P-1

Issuers (or supporting institutions) rated Prime-1 have a superior ability to repay short-term debt obligations.

P-2

Issuers (or supporting institutions) rated Prime-2 have a strong ability to repay short-term debt obligations.

P-3

Issuers (or supporting institutions) rated Prime-3 have an acceptable ability to repay short-term obligations.

N P

Issuers (or supporting institutions) rated Not Prime do not fall within any of the Prime rating categories.

III. S&P Global

a. S&P Global’s Corporate Bonds and Preferred Stock (long-term)

Issue credit ratings are based, in varying degrees, on S&P Global Ratings’ analysis the following considerations:

•

Likelihood of payment—capacity and willingness of the obligor to meet its financial commitment on an obligation in accordance with the terms of the obligation;

•

Nature of and provisions of the obligation; and the promise imputed.

•

Protection afforded by, and relative position of, the financial obligation in the event of bankruptcy, reorganization, or other arrangement under the laws of bankruptcy and other laws affecting creditors’ rights.

Issue ratings are an assessment of default risk, but may incorporate an assessment of relative seniority or ultimate recovery in the event of default. Junior obligations are typically rated lower than senior obligations, to reflect the lower priority in bankruptcy, as noted above. (Such differentiation may apply when an entity has both senior and subordinated obligations, secured and unsecured obligations, or operating company and holding company obligations.)

AAA

An obligation rated ‘AAA’ has the highest rating assigned by S&P Global Ratings. The obligor’s capacity to meet its financial commitments on the obligation is extremely strong.

An obligation rated ‘AA’ differs from the highest-rated obligations only to a small degree. The obligor’s capacity to meet its financial commitments on the obligation is very strong.

An obligation rated ‘A’ is somewhat more susceptible to the adverse effects of changes in circumstances and economic conditions than obligations in higher-rated categories. However, the obligor’s capacity to meet its financial commitments on the obligation is still strong.

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BBB

An obligation rated 'BBB' exhibits adequate protection parameters. However, adverse economic conditions or changing circumstances are more likely to weaken the obligor's capacity to meet its financial commitments on the obligation.

BB, B, CCC, CC, and C

Obligations rated 'BB', 'B', 'CCC', 'CC', and 'C' are regarded as having significant speculative characteristics. 'BB' indicates the least degree of speculation and 'C' the highest. While such obligations will likely have some quality and protective characteristics, these may be outweighed by large uncertainties or major exposure to adverse conditions.

An obligation rated 'BB' is less vulnerable to nonpayment than other speculative issues. However, it faces major ongoing uncertainties or exposure to adverse business, financial, or economic conditions that could lead to the obligor's inadequate capacity to meet its financial commitments on the obligation.

An obligation rated 'B' is more vulnerable to nonpayment than obligations rated 'BB', but the obligor currently has the capacity to meet its financial commitments on the obligation. Adverse business, financial, or economic conditions will likely impair the obligor's capacity or willingness to meet its financial commitments on the obligation.

CCC

An obligation rated 'CCC' is currently vulnerable to nonpayment and is dependent upon favorable business, financial, and economic conditions for the obligor to meet its financial commitments on the obligation. In the event of adverse business, financial, or economic conditions, the obligor is not likely to have the capacity to meet its financial commitments on the obligation.

An obligation rated 'CC' is currently highly vulnerable to nonpayment. The 'CC' rating is used when a default has not yet occurred but S&P Global Ratings expects default to be a virtual certainty, regardless of the anticipated time to default.

An obligation rated 'C' is currently highly vulnerable to nonpayment, and the obligation is expected to have lower relative seniority or lower ultimate recovery compared with obligations that are rated higher.

An obligation rated 'D' is in default or in breach of an imputed promise. For non-hybrid capital instruments, the 'D' rating category is used when payments on an obligation are not made on the date due, unless S&P Global Ratings believes that such payments will be made within the next five business days in the absence of a stated grace period or within the earlier of the stated grace period or the next 30 calendar days. The 'D' rating also will be used upon the filing of a bankruptcy petition or the taking of similar action and where default on an obligation is a virtual certainty, for example due to automatic stay provisions. A rating on an obligation is lowered to 'D' if it is subject to a distressed debt restructuring.

Plus (+) or minus (-)

The ratings from ‘AA’ to ‘CCC’ may be modified by the addition of a plus (+) or minus (-) sign to show relative standing within the rating categories.

b. S&P Global Ratings Commercial Paper (short-term)

A-1

A short-term obligation rated 'A-1' is rated in the highest category by S&P Global Ratings. The obligor's capacity to meet its financial commitments on the obligation is strong. Within this category, certain obligations are designated with a plus sign (+). This indicates that the obligor's capacity to meet its financial commitments on these obligations is extremely strong.

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A-2

A short-term obligation rated 'A-2' is somewhat more susceptible to the adverse effects of changes in circumstances and economic conditions than obligations in higher rating categories. However, the obligor's capacity to meet its financial commitments on the obligation is satisfactory.

A-3

A short-term obligation rated 'A-3' exhibits adequate protection parameters. However, adverse economic conditions or changing circumstances are more likely to weaken an obligor's capacity to meet its financial commitments on the obligation.

A short-term obligation rated 'B' is regarded as vulnerable and has significant speculative characteristics. The obligor currently has the capacity to meet its financial commitments; however, it faces major ongoing uncertainties that could lead to the obligor's inadequate capacity to meet its financial commitments.

A short-term obligation rated 'C' is currently vulnerable to nonpayment and is dependent upon favorable business, financial, and economic conditions for the obligor to meet its financial commitments on the obligation.

A short-term obligation rated 'D' is in default or in breach of an imputed promise. For non-hybrid capital instruments, the 'D' rating category is used when payments on an obligation are not made on the date due, unless S&P Global Ratings believes that such payments will be made within any stated grace period. However, any stated grace period longer than five business days will be treated as five business days. The 'D' rating also will be used upon the filing of a bankruptcy petition or the taking of a similar action and where default on an obligation is a virtual certainty, for example due to automatic stay provisions. A rating on an obligation is lowered to 'D' if it is subject to a distressed debt restructuring.

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APPENDIX B - Directors and Officers

The directors and officers of the Fund are listed below, together with their principal occupations during the last five years. The information is as of December 31, 2024, except as otherwise noted.

Name, Address, and Year of Birth	Position(s) Held with Fund	Term of Office and Length of Time Served1	Principal Occupation(s) During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Director	Other Directorships Held by Director2
Interested Director
Rosanne L. Kropp c/o Northwestern Mutual Series Fund, Inc. Attn: Secretary 720 East Wisconsin Ave. Milwaukee, WI 53202 1973	Chair of the Board	2024	Since October 2024, Vice President – Insurance Solutions, The Northwestern Mutual Life Insurance Company (“NM”). From January 2022 to September 2024, Vice President and Head of Public Investments at NM. From November 2019 to December 2021, Vice President and Head of Investment Strategy Department at NM. From April 2016 to October 2019, Managing Director, Head of Investment Strategy at Allianz Investment Management.	30	None
Independent Directors
Christy L. Brown c/o Northwestern Mutual Series Fund, Inc. Attn: Secretary 720 East Wisconsin Ave. Milwaukee, WI 53202 1965	Director	2012	Since July 2023, President of Alverno College (Milwaukee, Wisconsin). From 2012 to 2023, Chief Executive Officer, Girl Scouts of Wisconsin Southeast. From 2007 to 2012, Vice Chancellor, Finance and Administrative Affairs, University of Wisconsin, Milwaukee.	30	None
William J. Gerber c/o Northwestern Mutual Series Fund, Inc. Attn: Secretary 720 East Wisconsin Ave. Milwaukee, WI 53202 1958	Director	2017	Retired. From 2006 to 2015, Chief Financial Officer, and from 2007 to 2015, Executive Vice President, of TD Ameritrade Holdings Corporation.	30	None
Gail L. Hanson c/o Northwestern Mutual Series Fund, Inc. Attn: Secretary 720 East Wisconsin Ave. Milwaukee, WI 53202 1955	Director	2012	Retired. From February 2011 to April 2018, Chief Financial Officer, Aurora Health Care. Prior thereto, Deputy Executive Director, State of Wisconsin Investment Board.	30	Director of Artisan Partner Funds (21 portfolios)

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Name, Address, and Year of Birth	Position(s) Held with Fund	Term of Office and Length of Time Served1	Principal Occupation(s) During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Director	Other Directorships Held by Director2
Elizabeth A. Levy- Navarro* c/o Northwestern Mutual Series Fund, Inc. Attn: Secretary 720 East Wisconsin Ave. Milwaukee, WI 53202 1963 *Effective as of July 1, 2024	Director	2024	Since 2018, Corporate Advisor of Summit Strategy Advisors. From 2002 to 2017, Co-founder, CEO and Value Creation Expert of Orrington Strategies, a management consulting firm.	30	Director of Wilshire Mutual Funds Inc. (8 portfolios)
David Ribbens c/o Northwestern Mutual Series Fund, Inc. Attn: Secretary 720 East Wisconsin Ave. Milwaukee, WI 53202 1961	Director	2017	Since March of 2018, Member and Partner of DOMO Capital Management, LLC, a Wisconsin registered investment adviser. Founder and President of Distribution Team Alpha LLC, founded in 2016. From 2015 to 2016, President, Managing Partner, and Director of Heartland Advisors, Inc. From 2008 to 2015, Executive Vice President and Head of Distribution, Managing Partner, and Director of Heartland Advisors, Inc.	30	None
Donald M. Ullmann c/o Northwestern Mutual Series Fund, Inc. Attn: Secretary 720 East Wisconsin Ave. Milwaukee, WI 53202 1957	Director	2017	Since 2015, Principal of DMU Financial Consulting, LLC. From 2013 to 2015, Managing Director, Head of Product Development, Fixed Income at Guggenheim Securities. From 2012 to 2013, Executive Managing Director, Co- head, MBS and Rates Division at Gleacher & Co. From 2009 to 2011, Executive Vice President, Head of Fixed Income Trading and Co-Head of Fixed Income Sales at Keefe, Bruyette and Woods, Inc.	30	None
Officers
Paul A. Mikelson 720 East Wisconsin Ave. Milwaukee, WI 53202 1970	President	2022	Since January 2022, Vice President – Product and Administration of Mason Street Advisors. From 2013 - December 31, 2021, Vice President, Multi-Manager Investment Solutions at Columbia Threadneedle Investments, an Ameriprise Financial affiliate.	N/A	N/A

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Name, Address, and Year of Birth	Position(s) Held with Fund	Term of Office and Length of Time Served1	Principal Occupation(s) During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Director	Other Directorships Held by Director2
Phil J. Rinzel* 720 East Wisconsin Ave. Milwaukee, WI 53202 1979 *Effective as of September 1, 2024	Vice President, Chief Financial Officer and Treasurer	2024	Since 2024, Vice President – Investment Accounting of Northwestern Mutual. From 2016 – August 31, 2024, Senior Director – Investment Accounting.	N/A	N/A
Brent G. Schutte 720 East Wisconsin Ave. Milwaukee, WI 53202 1973	Vice President - Investments	2022	Since 2015, Chief Investment Officer of Northwestern Mutual Wealth Management Company. Since December 2021, Chief Investment Officer of Mason Street Advisors. Since March 2022, Director of Mason Street Advisors.	N/A	N/A
Garrett D. Aird 720 East Wisconsin Ave. Milwaukee, WI 53202 1978	Vice President - Investments	2022	Since November 2021, Vice President – Investment Management & Research of Northwestern Mutual Wealth Management Company (NMWMC). Since December 2021, Vice President – Investments of Mason Street Advisors. From 2017 to November 2021, Senior Director – Research at NMWMC. Prior thereto, Assistant Director – Investments at NMWMC.	N/A	N/A
James E. Fleming 720 East Wisconsin Ave. Milwaukee, WI 53202 1975	Vice President - Investments	2020	Since 2015, Vice President of Mason Street Advisors.	N/A	N/A
Rodney A. Schmucker 720 East Wisconsin Ave. Milwaukee, WI 53202 1966	Vice President - Investments	2020	Since 2015, Vice President of Mason Street Advisors.	N/A	N/A
Michael J. Conmey 720 East Wisconsin Ave. Milwaukee, WI 53202 1980	Chief Compliance Officer	2020	Vice President – Managed Investments Compliance of Northwestern Mutual and Chief Compliance Officer of Mason Street Advisors and Northwestern Mutual Investment Management Company since June 2020. Assistant General Counsel and Assistant Secretary of Northwestern Mutual from 2011 to 2020.	N/A	N/A

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Name, Address, and Year of Birth	Position(s) Held with Fund	Term of Office and Length of Time Served1	Principal Occupation(s) During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Director	Other Directorships Held by Director2
David B. Kennedy 720 East Wisconsin Ave. Milwaukee, WI 53202 1959	Secretary	2023	Assistant General Counsel and Assistant Secretary of Northwestern Mutual since 2016. Secretary of Mason Street Advisors since 2020.	N/A	N/A
Linda L. Wisniewski* 720 East Wisconsin Ave. Milwaukee, WI 53202 1974 *Effective as of September 1, 2024	Controller and Chief Accounting Officer	2024	Since 2024, Senior Director – Investment Accounting of Northwestern Mutual. Since 2021, Head of Fund Administration. From 2011 to 2021, Assistant Director – Mutual Fund Administration.	N/A	N/A

1 Each director (whenever elected) shall hold office until the next annual meeting of shareholders and until his or her successor is elected and qualifies or until his or her earlier death, resignation or removal. A director shall retire at the end of the calendar year in which the first of the two events occurs: (i) he or she attains the age of seventy-three (73), or (ii) he or she has served a term or successive terms totaling fifteen (15) years, commencing on the date of his or her election or appointment to the Board. Each officer holds office until their successor shall have been duly elected or until their prior death, resignation or removal.

2 This column includes only directorships of companies required to report to the Securities and Exchange Commission (SEC) under the Securities Exchange Act of 1934, as amended (i.e., “public companies”) or other investment companies registered under the Investment Company Act of 1940, as amended.

Ms. Kropp is an “interested person” of the Fund, as defined in Section 2(a)(19) of the 1940 Act, because she is a Vice President of The Northwestern Mutual Life Insurance Company, the parent corporation of Mason Street Advisors, LLC, the Fund’s investment adviser.

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APPENDIX C - Ownership of Shares of the Fund

The following tables show the allocation of shares of the Portfolios of the Fund among the separate investment accounts as of March 31, 2025. All shares are owned of record.

GROWTH STOCK PORTFOLIO

NML Variable Annuity Account A	5,053,882	shares	1.6%
NML Variable Annuity Account B	93,376,771	shares	29.5%
NML Variable Annuity Account C	317,973	shares	0.1%
Northwestern Mutual Variable Life Account	208,038,212	shares	65.7%
Northwestern Mutual Variable Life Account II	9,833,647	shares	3.1%
Total	316,620,485	shares	100.0%

FOCUSED APPRECIATION PORTFOLIO

NML Variable Annuity Account A	8,978,006	shares	2.9%
NML Variable Annuity Account B	171,165,398	shares	56.0%
NML Variable Annuity Account C	1,045,631	shares	0.3%
Northwestern Mutual Variable Life Account	94,408,019	shares	31.0%
Northwestern Mutual Variable Life Account II	17,720,716	shares	5.8%
Balanced Portfolio	9,843,797	shares	3.2%
Asset Allocation Portfolio	2,302,269	shares	0.8%
Total	305,463,836	shares	100.0%

LARGE CAP CORE STOCK PORTFOLIO

NML Variable Annuity Account A	5,311,124	shares	1.4%
NML Variable Annuity Account B	115,957,626	shares	29.8%
NML Variable Annuity Account C	501,683	shares	0.1%
Northwestern Mutual Variable Life Account	255,152,112	shares	65.6%
Northwestern Mutual Variable Life Account II	12,007,182	shares	3.1%
Total	388,929,727	shares	100.0%

LARGE CAP BLEND PORTFOLIO

NML Variable Annuity Account A	2,868,929	shares	2.0%
NML Variable Annuity Account B	62,712,900	shares	43.4%
NML Variable Annuity Account C	753,051	shares	0.5%
Northwestern Mutual Variable Life Account	21,733,236	shares	15.0%
Northwestern Mutual Variable Life Account II	4,121,780	shares	2.9%
Balanced Portfolio	42,407,468	shares	29.3%
Asset Allocation Portfolio	9,914,157	shares	6.9%
Total	144,511,521	shares	100.0%

INDEX 500 STOCK PORTFOLIO

NML Variable Annuity Account A	20,168,322	shares	3.0%
NML Variable Annuity Account B	279,831,825	shares	41.0%
NML Variable Annuity Account C	1,812,072	shares	0.3%
Northwestern Mutual Variable Life Account	282,358,826	shares	41.5%
Northwestern Mutual Variable Life Account II	96,433,482	shares	14.2%
Total	680,604,527	shares	100.0%

LARGE COMPANY VALUE PORTFOLIO

NML Variable Annuity Account A	12,306,052	shares	6.6%
NML Variable Annuity Account B	125,540,778	shares	66.8%
NML Variable Annuity Account C	784,441	shares	0.4%
Northwestern Mutual Variable Life Account	36,976,656	shares	19.7%

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Northwestern Mutual Variable Life Account II	12,199,443	shares	6.5%
Total	187,807,370	shares	100.0%

DOMESTIC EQUITY PORTFOLIO

NML Variable Annuity Account A	21,795,999	shares	3.2%
NML Variable Annuity Account B	410,456,536	shares	60.2%
NML Variable Annuity Account C	1,856,775	shares	0.3%
Northwestern Mutual Variable Life Account	146,228,865	shares	21.5%
Northwestern Mutual Variable Life Account II	62,700,746	shares	9.1%
Balanced Portfolio	31,008,031	shares	4.6%
Asset Allocation Portfolio	7,232,246	shares	1.1%
Total	681,279,198	shares	100.0%

EQUITY INCOME PORTFOLIO

NML Variable Annuity Account A	23,111,008	shares	5.7%
NML Variable Annuity Account B	274,581,248	shares	67.5%
NML Variable Annuity Account C	1,333,482	shares	0.3%
Northwestern Mutual Variable Life Account	92,748,619	shares	22.8%
Northwestern Mutual Variable Life Account II	15,188,825	shares	3.7%
Total	406,963,182	shares	100.0%

MID CAP GROWTH STOCK PORTFOLIO

NML Variable Annuity Account A	4,948,757	shares	1.7%
NML Variable Annuity Account B	100,279,463	shares	33.4%
NML Variable Annuity Account C	224,117	shares	0.1%
Northwestern Mutual Variable Life Account	177,269,545	shares	59.1%
Northwestern Mutual Variable Life Account II	5,568,429	shares	1.9%
Balanced Portfolio	9,693,737	shares	3.2%
Asset Allocation Portfolio	1,862,517	shares	0.6%
Total	299,846,565	shares	100.0%

INDEX 400 STOCK PORTFOLIO

NML Variable Annuity Account A	24,921,378	shares	4.2%
NML Variable Annuity Account B	288,346,291	shares	48.4%
NML Variable Annuity Account C	1,822,283	shares	0.3%
Northwestern Mutual Variable Life Account	210,240,348	shares	35.3%
Northwestern Mutual Variable Life Account II	70,156,806	shares	11.8%
Total	595,487,106	shares	100.0%

MID CAP VALUE PORTFOLIO

NML Variable Annuity Account A	13,873,731	shares	3.4%
NML Variable Annuity Account B	273,893,941	shares	66.8%
NML Variable Annuity Account C	1,087,289	shares	0.3%
Northwestern Mutual Variable Life Account	56,788,242	shares	13.8%
Northwestern Mutual Variable Life Account II	39,126,993	shares	9.5%
Balanced Portfolio	21,351,676	shares	5.2%
Asset Allocation Portfolio	4,103,541	shares	1.0%
Total	410,225,413	shares	100.0%

SMALL CAP GROWTH STOCK PORTFOLIO

NML Variable Annuity Account A	4,587,158	shares	1.6%
NML Variable Annuity Account B	113,927,441	shares	39.5%
NML Variable Annuity Account C	576,208	shares	0.1%
Northwestern Mutual Variable Life Account	138,948,473	shares	48.2%

B-89

Northwestern Mutual Variable Life Account II	20,146,419	shares	7.0%
Balanced Portfolio	8,989,835	shares	3.1%
Asset Allocation Portfolio	1,380,149	shares	0.5%
Total	288,555,683	shares	100.0%

INDEX 600 STOCK PORTFOLIO

NML Variable Annuity Account A	18,044,292	shares	6.0%
NML Variable Annuity Account B	170,951,164	shares	56.7%
NML Variable Annuity Account C	2,120,745	shares	0.7%
Northwestern Mutual Variable Life Account	53,123,747	shares	17.5%
Northwestern Mutual Variable Life Account II	57,507,658	shares	19.1%
Total	301,747,606	shares	100.0%

SMALL CAP VALUE PORTFOLIO

NML Variable Annuity Account A	6,432,721	shares	2.3%
NML Variable Annuity Account B	144,109,395	shares	51.2%
NML Variable Annuity Account C	630,287	shares	0.2%
Northwestern Mutual Variable Life Account	105,851,117	shares	37.6%
Northwestern Mutual Variable Life Account II	10,274,428	shares	3.7%
Balanced Portfolio	12,331,375	shares	4.4%
Asset Allocation Portfolio	1,715,627	shares	0.6%
Total	281,344,950	shares	100.0%

INTERNATIONAL GROWTH STOCK PORTFOLIO

NML Variable Annuity Account A	23,488,905	shares	4.4%
NML Variable Annuity Account B	328,965,631	shares	61.9%
NML Variable Annuity Account C	1,374,496	shares	0.3%
Northwestern Mutual Variable Life Account	77,777,354	shares	14.6%
Northwestern Mutual Variable Life Account II	57,244,451	shares	10.8%
Balanced Portfolio	35,249,710	shares	6.6%
Asset Allocation Portfolio	7,423,200	shares	1.4%
Total	531,523,747	shares	100.0%

RESEARCH INTERNATIONAL CORE PORTFOLIO

NML Variable Annuity Account A	42,074,135	shares	5.3%
NML Variable Annuity Account B	567,216,687	shares	71.6%
NML Variable Annuity Account C	2,148,909	shares	0.3%
Northwestern Mutual Variable Life Account	74,546,293	shares	9.4%
Northwestern Mutual Variable Life Account II	106,598,162	shares	13.4%
Total	792,584,186	shares	100.0%

INTERNATIONAL EQUITY PORTFOLIO

NML Variable Annuity Account A	50,359,731	shares	4.3%
NML Variable Annuity Account B	633,855,232	shares	54.3%
NML Variable Annuity Account C	2,606,532	shares	0.2%
Northwestern Mutual Variable Life Account	335,117,079	shares	28.7%
Northwestern Mutual Variable Life Account II	90,835,946	shares	7.8%
Balanced Portfolio	44,519,867	shares	3.9%
Asset Allocation Portfolio	9,103,149	shares	0.8%
Total	1,166,397,536	shares	100.0%

EMERGING MARKETS EQUITY PORTFOLIO

NML Variable Annuity Account A	74,552,895	shares	6.8%
NML Variable Annuity Account B	714,745,296	shares	65.2%

B-90

NML Variable Annuity Account C	3,816,959	shares	0.3%
Northwestern Mutual Variable Life Account	82,182,618	shares	7.5%
Northwestern Mutual Variable Life Account II	141,529,564	shares	12.9%
Balanced Portfolio	68,867,956	shares	6.3%
Asset Allocation Portfolio	10,867,361	shares	1.0%
Total	1,096,562,649	shares	100.0%

GOVERNMENT MONEY MARKET PORTFOLIO

NML Variable Annuity Account A	28,298,237	shares	5.5%
NML Variable Annuity Account B	272,362,900	shares	53.0%
NML Variable Annuity Account C	853,416	shares	0.2%
Northwestern Mutual Variable Life Account	176,438,087	shares	34.4%
Northwestern Mutual Variable Life Account II	35,564,206	shares	6.9%
Total	513,516,846	shares	100.0%

SHORT-TERM BOND PORTFOLIO

NML Variable Annuity Account A	45,263,722	shares	12.1%
NML Variable Annuity Account B	247,200,619	shares	65.9%
NML Variable Annuity Account C	1,366,454	shares	0.4%
Northwestern Mutual Variable Life Account	35,318,236	shares	9.4%
Northwestern Mutual Variable Life Account II	13,942,531	shares	3.7%
Balanced Portfolio	29,204,808	shares	7.8%
Asset Allocation Portfolio	2,769,199	shares	0.7%
Total	375,065,569	shares	100.0%

SELECT BOND PORTFOLIO

NML Variable Annuity Account A	131,021,848	shares	5.2%
NML Variable Annuity Account B	1,557,429,461	shares	61.4%
NML Variable Annuity Account C	5,861,215	shares	0.2%
Northwestern Mutual Variable Life Account	255,981,652	shares	10.1%
Northwestern Mutual Variable Life Account II	85,067,319	shares	3.4%
Balanced Portfolio	458,934,024	shares	18.1%
Asset Allocation Portfolio	43,332,279	shares	1.6%
Total	2,537,627,798	shares	100.0%

LONG-TERM U.S. GOVERNMENT BOND PORTFOLIO

NML Variable Annuity Account A	24,421,304	shares	12.7%
NML Variable Annuity Account B	121,200,286	shares	63.1%
NML Variable Annuity Account C	667,549	shares	0.3%
Northwestern Mutual Variable Life Account	36,617,662	shares	19.1%
Northwestern Mutual Variable Life Account II	9,181,819	shares	4.8%
Total	192,088,620	shares	100.0%

INFLATION MANAGED PORTFOLIO

NML Variable Annuity Account A	32,760,453	shares	8.4%
NML Variable Annuity Account B	324,759,807	shares	82.9%
NML Variable Annuity Account C	1,203,367	shares	0.2%
Northwestern Mutual Variable Life Account	13,672,579	shares	3.5%
Northwestern Mutual Variable Life Account II	19,547,620	shares	5.0%
Total	391,943,826	shares	100.0%

HIGH YIELD BOND PORTFOLIO

NML Variable Annuity Account A	82,376,034	shares	8.1%
NML Variable Annuity Account B	704,917,508	shares	69.0%

B-91

NML Variable Annuity Account C	3,347,432	shares	0.3%
Northwestern Mutual Variable Life Account	182,105,189	shares	17.8%
Northwestern Mutual Variable Life Account II	49,239,491	shares	4.8%
Total	1,021,985,654	shares	100.0%

MULTI-SECTOR BOND PORTFOLIO

NML Variable Annuity Account A	119,804,833	shares	9.2%
NML Variable Annuity Account B	889,989,243	shares	68.2%
NML Variable Annuity Account C	4,197,757	shares	0.2%
Northwestern Mutual Variable Life Account	67,003,206	shares	5.1%
Northwestern Mutual Variable Life Account II	64,836,159	shares	5.0%
Balanced Portfolio	145,989,214	shares	11.2%
Asset Allocation Portfolio	13,866,939	shares	1.1%
Total	1,305,687,351	shares	100.0%

ACTIVE/PASSIVE BALANCED PORTFOLIO

NML Variable Annuity Account A	40,108,862	shares	2.8%
NML Variable Annuity Account B	1,046,798,272	shares	74.2%
NML Variable Annuity Account C	3,326,345	shares	0.2%
Northwestern Mutual Variable Life Account	312,598,330	shares	22.1%
Northwestern Mutual Variable Life Account II	8,687,563	shares	0.7%
Total	1,411,519,372	shares	100.0%

ACTIVE/PASSIVE MODERATE PORTFOLIO

NML Variable Annuity Account A	3,131,779	shares	1.3%
NML Variable Annuity Account B	176,269,022	shares	74.1%
NML Variable Annuity Account C	351,033	shares	0.1%
Northwestern Mutual Variable Life Account	55,149,428	shares	23.3%
Northwestern Mutual Variable Life Account II	2,836,344	shares	1.2%
Total	237,737,606	shares	100.0%

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APPENDIX D - Portfolio Managers

Other Accounts Managed by Portfolio Managers

Certain of the Fund’s portfolio managers or members of the investment team as identified in the Prospectus also manage other mutual funds, other pooled investment vehicles that are not registered mutual funds, and other accounts managed for organizations and individuals. The table below identifies for each person, the number of accounts (other than the Portfolios), for which he or she has day-to-day management responsibilities and the total assets in such accounts, within each of the following categories: registered investment companies, other pooled investment vehicles, and other accounts. These categories are collectively referred to as “accounts.” To the extent that any of these accounts pay advisory fees that are based on the performance of the account, that information is specifically identified. The following information is as of December 31, 2023, unless otherwise noted.

Portfolio Manager(s)	Fund	Other Registered Investment Companies	Other Pooled Investment Vehicles	Other Accounts
James Fleming	Active/Passive Balanced Portfolio Active/Passive Moderate Portfolio	No other registered investment companies	No other pooled investment vehicles	No other accounts

Rodney Schmucker	Active/Passive Balanced Portfolio Active/Passive Moderate Portfolio	No other registered investment companies	No other pooled investment vehicles	No other accounts

Brent G. Schutte	Active/Passive Balanced Portfolio Active/Passive Moderate Portfolio	No other registered investment companies	No other pooled investment vehicles	No other accounts. (See below)

Garret D. Aird	Active/Passive Balanced Portfolio Active/Passive Moderate Portfolio	No other registered investment companies	No other pooled investment vehicles	No other accounts. (See below)

Roger C. Kuo	International Equity Portfolio	2 registered investment companies with approximately $58.2 billion in total assets under management	1 other pooled investment vehicle with approximately $5.5 billion in total assets under management	No other accounts

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Portfolio Manager(s)	Fund	Other Registered Investment Companies	Other Pooled Investment Vehicles	Other Accounts
Mario C. DiPrisco	International Equity Portfolio	2 registered investment companies with approximately $47.7 billion in total assets under management	1 other pooled investment vehicle with approximately $25 million in total assets under management	1 other accounts with $253 thousand in total assets under management

Sophie Chen	International Equity Portfolio	1 registered investment company with $296 million in total assets under management	1 other pooled investment vehicle with approximately $25 million in total assets under management	No other accounts

Englebert T. Bangayan	International Equity Portfolio	1 registered investment company with $47.4 billion in total assets under management	No other pooled investment vehicles	No other accounts

B-94

Portfolio Manager(s)	Fund	Other Registered Investment Companies	Other Pooled Investment Vehicles	Other Accounts
Raymond J. Mertens	International Equity Portfolio	2 registered investment companies with approximately $58.2 billion in total assets under management	1 other pooled investment vehicle with $5.5 billion in total assets under management	No other accounts

Paritosh Somani	International Equity Portfolio	1 registered investment company with $47.4 billion in total assets under management	No other pooled investment vehicles	No other accounts

Nikhil G. Lalvani	Domestic Equity Portfolio	4 registered investment companies with $6.2 billion in total assets under management	4 other pooled investment vehicles with $354.1 million in total assets under management	22 other accounts with $3.1 billion in total assets under management

Kristen E. Bartholdson	Domestic Equity Portfolio	4 registered investment companies with $6.2 billion in total assets under management	4 other pooled investment vehicles with $354.1 million in total assets under management	22 other accounts with $3.1 billion in total assets under management

Erin Ksenak	Domestic Equity Portfolio	4 registered investment companies with $6.2 billion in total assets under management	4 other pooled investment vehicles with $354.1 million in total assets under management	22 other accounts with $3.1 billion in total assets under management

J. David Wagner	Small Cap Value Portfolio	3 registered investment companies with approximately $10.8 billion in total assets under management	5 other pooled investment vehicles with approximately $5.6 billion in total assets under management	No other accounts

B-95

Portfolio Manager(s)	Fund	Other Registered Investment Companies	Other Pooled Investment Vehicles	Other Accounts
John D. Linehan	Equity Income Portfolio	16 registered investment companies with approximately $34.8 billion in total assets under management	33 other pooled investment vehicles with approximately $22.6 billion in total assets under management	11 other accounts with approximately $2.4 billion in total assets under management

Aziz V. Hamzaogullari	Focused Appreciation Portfolio	29 registered investment companies with approximately $24.1 billion in total assets under management	20 other pooled investment vehicles with approximately $14.2 billion in total assets under management. 3 other pooled investment vehicles with approximately $689 million in total assets which charges an advisory fee based on the performance of the account.	136 other accounts with approximately $30.4 billion in total assets under management. 1 other account with approximately $361.1 million in total assets which charges an advisory fee based on the performance of the account.

Michael Liss	Mid Cap Value Portfolio	18 registered investment companies with approximately $27.02 billion in total assets under management	4 other pooled investment vehicles with approximately $2.49 billion in total assets under management	12 other accounts with $1.83 billion in total assets under management

Kevin Toney	Mid Cap Value Portfolio	18 registered investment companies with approximately $27.02 billion in total assets under management	4 other pooled investment vehicles with approximately $2.49 billion in total assets under management	12 other accounts with $1.83 billion in total assets under management

Nathan Rawlins	Mid Cap Value Portfolio	10 registered investment companies with approximately $11.29 billion in total assets under management	1 other pooled investment vehicle with approximately $1.12 billion in total assets under management	3 other accounts with approximately $411.88 million in total assets under management

B-96

Portfolio Manager(s)	Fund	Other Registered Investment Companies	Other Pooled Investment Vehicles	Other Accounts
Scott B. Davis	Large Cap Blend Portfolio	22 registered investment companies with $31.17 billion in total assets under management	6 other pooled investment vehicles with $14.77 billion in total assets under management	31 other accounts with $18.53 billion in total assets under management. 3 other accounts with $1.01 billion in total assets which charges and advisory fee based on the performance of the account

Shilpee Raina	Large Cap Blend Portfolio	22 registered investment companies with $30.97 billion in total assets under management	7 other pooled investment vehicles with $19.03 billion in total assets under management	30 other accounts with $19.03 billion in total assets under management. 3 other accounts with $1.01 billion in total assets which charges an advisory fee based on the performance of the account

Brian Woglom	Large Company Value Portfolio Mid Cap Value Portfolio	22 registered investment companies with approximately $28.96 billion in total assets under management	4 other pooled investment vehicles with approximately $2.49 billion in total assets under management	10 other accounts with $1.83 billion in total assets under management

Philip Sundell	Large Company Value Portfolio	8 registered investment companies with approximately $8.10 billion in total assets under management	7 other pooled investment vehicles with approximately $7.47 million in total assets under management	1 other account with $650.1 thousand in total assets under management

Adam Krenn	Large Company Value Portfolio	6 registered investment companies with approximately $5.05 billion in total assets under management	No other pooled investment vehicles.	1 other account with approximately $650.1 thousand in total assets under management

Devan Kaloo	Emerging Markets Equity Portfolio	3 registered investment companies with approximately $3.6 billion in total assets under management	7 other pooled investment vehicles with approximately $5.1 billion in total assets under management	9 other accounts with approximately $2.7 billion in total assets under management

B-97

Portfolio Manager(s)	Fund	Other Registered Investment Companies	Other Pooled Investment Vehicles	Other Accounts
Nick Robinson	Emerging Markets Equity Portfolio	3 registered investment companies with approximately $0.5 billion in total assets under management	3 other pooled investment vehicles with approximately $0.1 billion in total assets under management	2 other accounts with approximately $2.5 billion in total assets under management

Sonali Pier	Multi-Sector Bond Portfolio	9 registered investment companies with approximately $16.13 billion in total assets under management	28 other pooled investment vehicles with approximately $14.39 billion in total assets under management. 2 other pooled investment vehicles with approximately $528.95 million in total assets which charges an advisory fee based on the performance of the account.	33 other accounts with approximately $9.77 billion in total assets under management. 1 other account with approximately $299.18 million in total assets which charges an advisory fee based on the performance of the account.

Daniel J. Ivascyn	Multi-Sector Bond Portfolio	19 registered investment companies with approximately $181.67 billion in total assets under management	14 other pooled investment vehicles with approximately $74.41 billion in total assets under management. 10 other pooled investment vehicles with approximately $2.57 billion in total assets which charges an advisory fee based on the performance of the account.	26 other accounts with approximately $38.84 billion in total assets under management. 1 other account with approximately $318.72 million in total assets which charges an advisory fee based on the performance of the account.

B-98

Portfolio Manager(s)	Fund	Other Registered Investment Companies	Other Pooled Investment Vehicles	Other Accounts
Alfred T. Murata	Multi-Sector Bond Portfolio	20 registered investment companies with approximately $181.89 billion in total assets under management	17 other pooled investment vehicles with approximately $37.24 billion in total assets under management. 5 other pooled investment vehicles with approximately $2.45 billion in total assets which charges an advisory fee based on the performance of the account.	6 other accounts with approximately $1.48 billion in total assets under management

Charles Watford	Multi-Sector Bond Portfolio	2 registered investment companies with approximately $3.67 billion in total assets under management	8 other pooled investment vehicles with approximately $1.61 billion in total assets under management	4 other accounts with $954.45 million in total assets under management.

Regina Borromeo	Multi-Sector Bond Portfolio	2 registered investment companies with approximately $3.37 billion in total assets under management	7 other pooled investment vehicles with approximately $1.33 billion in total assets under management.	4 other accounts with approximately $792.56 million in total assets under management.

John Mahoney	Research International Core Portfolio	5 registered investment companies with $55.3 billion in total assets under management	3 other pooled investment vehicles with $293.4 million in total assets under management	2 other accounts with $315.8 million in total assets under management

Nicholas Paul	Research International Core Portfolio	5 registered investment companies with $55.3 billion in total assets under management	3 other pooled investment vehicles with $293.4 million in total assets under management	2 other accounts with $315.8 million in total assets under management

B-99

Portfolio Manager(s)	Fund	Other Registered Investment Companies	Other Pooled Investment Vehicles	Other Accounts
James E. Platz	Inflation Managed Portfolio	14 registered investment companies with approximately $18.52 billion in total assets under management	No other pooled investment vehicles	2 other accounts with approximately $556.13 million in total assets under management

Robert V. Gahagan	Inflation Managed Portfolio	13 registered investment companies with approximately $18.35 billion in total assets under management	No other pooled investment vehicles	2 other accounts with approximately $556.13 million in total assets under management

Miguel Castillo	Inflation Managed Portfolio	10 registered investment companies with approximately $11.34 billion in total assets under management	1 other pooled investment vehicle with approximately $99.69 million in total assets under management	2 other accounts with approximately $556.13 million in total assets under management

Stephen Bartolini	Inflation Managed Portfolio	5 registered investment companies with approximately $8.8 billion in total assets under management	No other pooled investment vehicles	No other accounts.

B-100

Portfolio Manager(s)	Fund	Other Registered Investment Companies	Other Pooled Investment Vehicles	Other Accounts
Stephen Rodosky	Long-Term U.S. Government Bond Portfolio	22 registered investment companies with approximately $33.28 billion in total assets under management	5 other pooled investment vehicles with approximately $973.51 million in total assets under management. 2 other pooled investment vehicles with approximately $3.85 billion in total assets which charge an advisory fee based on the performance of the account.	14 other accounts with approximately $8.72 billion in total assets under management. 4 other accounts with approximately $1.41 billion in total assets which charge an advisory fee based on the performance of the account.

Michael Cudzil	Long-Term U.S. Government Bond Portfolio	21 registered investment companies with approximately $21.76 billion in total assets under management	9 other pooled investment vehicles with approximately $1.72 billion in total assets under management. 2 other pooled investment vehicles with approximately $1.27 billion in total assets which charge an advisory fee based on the performance of the account.	51 other accounts with approximately $20.28 billion in total assets under management. 8 other accounts with approximately $1.39 billion in total assets which charge an advisory fee based on the performance of the account.

B-101

Portfolio Manager(s)	Fund	Other Registered Investment Companies	Other Pooled Investment Vehicles	Other Accounts
Jed Weiss	International Growth Portfolio	5 registered investment companies with approximately $25.2 billion in total assets under management. 3 other investment companies with approximately $6.29 billion in total assets which charge an advisory fee based on the performance of the account.	4 other pooled investment vehicles with approximately $6.57 billion in total assets under management	1 other account with $2 million in total assets under management

Paul D. Greene II	Growth Stock Portfolio	8 registered investment companies with approximately $67.8 billion in total assets under management	24 other pooled investment vehicles with approximately $22.8 billion in total assets under management	2 other accounts with approximately $562.9 million in total assets under management

Jonathan G. White	Large Cap Core Stock Portfolio	19 registered investment companies with approximately $14.9 billion in total assets under management. 3 other investment companies with approximately $5 billion in total assets which charges an advisory fee based on the performance of the account.	53 other pooled investment vehicles with approximately $16.4 billion in total assets under management. 7 other pooled investment vehicles with approximately $3.6 billion in total assets which charge an advisory fee based on the performance of the account.	92 other accounts with approximately $28.2 billion in total assets under management. 12 other accounts with approximately $6 billion in total assets which charge an advisory fee based on the performance of the account.

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Portfolio Manager(s)	Fund	Other Registered Investment Companies	Other Pooled Investment Vehicles	Other Accounts
Mary L. Pryshlak	Large Cap Core Stock Portfolio	16 registered investment companies with approximately $14.4 billion in total assets under management. 3 other investment companies with approximately $5 billion in total assets which charges an advisory fee based on the performance of the account.	51 other pooled investment vehicles with approximately $16.1 billion in total assets under management. 7 other pooled investment vehicles with approximately $3.6 billion in total assets which charge an advisory fee based on the performance of the account.	88 other accounts with approximately $28 billion in total assets under management. 12 other accounts with approximately $6 billion in total assets which charge an advisory fee based on the performance of the account.

Felise L. Agranoff	Mid Cap Growth Stock Portfolio	18 registered investment companies with $44.7 billion in total assets under management	7 other pooled investment vehicles with $14.2 billion in total assets under management	42 other accounts with $4.8 billion in total assets under management. 1 other account with $100 million in total assets which charge an advisory fee based on the performance of the account

Daniel Bloomgarden	Mid Cap Growth Stock Portfolio	7 registered investment companies with $20.4 billion in total assets under management	1 other pooled investment vehicles with $100 million in total assets under management.	4 other accounts with $700 million in total assets under management.

David Siegle	Small Cap Growth Stock Portfolio	12 registered investment companies with approximately $22.5 billion in total assets under management	11 other pooled investment vehicles with approximately $1.8 billion in total assets under management	16 other accounts with approximately $4.4 billion in total assets under management. 2 other accounts with approximately $1 billion in total assets which charges an advisory fee based on the performance of the account

Maulik Bhansali	Select Bond Portfolio	7 registered investment companies with approximately $13.1 billion in total assets under management	5 other pooled investment vehicles with approximately $2.4 billion in total assets under management.	25 other accounts with approximately $12.55 billion in total assets under management.

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Portfolio Manager(s)	Fund	Other Registered Investment Companies	Other Pooled Investment Vehicles	Other Accounts
Jarad Vasquez	Select Bond Portfolio	7 registered investment companies with approximately $13.1 billion in total assets under management	5 other pooled investment vehicles with approximately $2.4 billion in total assets under management.	25 other accounts with approximately $12.5 billion in total assets under management.

Mark E. Durbiano	High Yield Bond Portfolio	18 registered investment companies with $12.3 billion in total assets under management	3 other pooled investment vehicles with approximately $385.1 million in total assets under management	6 other accounts with approximately $1.1 billion in total assets under management. 1 other account with approximately $149.4 million in total assets which charges an advisory fee based on the performance of the account.

Kathryn Glass	High Yield Bond Portfolio	5 registered investment companies with $9.1 billion in total assets under management	2 other pooled investment vehicles with approximately $207.6 million in total assets under management	3 other accounts with approximately $236.3 million in total assets under management.

Thomas Scherr	High Yield Bond Portfolio	4 registered investment companies with $8.9 billion in total assets under management	3 other pooled investment vehicles with approximately $385.1 million in total assets under management	2 other accounts with approximately $896.8 million in total assets under management. 1 other account with approximately $149.4 million in total assets which charges an advisory fee based on the performance of the account.

Randal Stuckwish	High Yield Bond Portfolio	2 registered investment companies with $224.5 million in total assets under management	No other pooled investment vehicles	1 other accounts with approximately $43.5 million in total assets under management.

Michael F. Reinartz	Short-Term Bond Portfolio	5 registered investment companies with approximately $8.6 billion in total assets under management	4 other pooled investment vehicles with approximately $10.7 billion in total assets under management	2 other accounts with approximately $354.1 million in total assets under management

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Portfolio Manager(s)	Fund	Other Registered Investment Companies	Other Pooled Investment Vehicles	Other Accounts
Steve Kohlenstein	Short-Term Bond Portfolio	6 registered investment company with approximately $8.6 billion in total assets under management	2 other pooled investment vehicles with approximately $10.3 billion in total assets under management	2 other accounts with approximately $354.1 million in total assets under management

Peter Sietsema	Index 500 Stock Portfolio	60 registered investment companies with approximately $99.49 billion in total assets under management	No other pooled investment vehicles	5 other accounts with approximately $1.96 billion in total assets under management.

Jennifer Hsui	Index 500 Stock Portfolio	337 registered investment companies with approximately $2.14 trillion in total assets under management	No other pooled investment vehicles	No other accounts

Paul Whitehead	Index 500 Stock Portfolio	344 registered investment companies with approximately $2.15 trillion in total assets under management	342 other pooled investment vehicles with approximately$1.03 trillion in total assets under management	1 other account with approximately $2.77 billion in total assets which charges an advisory fee based on the performance of the account.

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Portfolio Manager(s)	Fund	Other Registered Investment Companies	Other Pooled Investment Vehicles	Other Accounts
Lucy Johnston	Index 400 Stock Portfolio Index 600 Stock Portfolio	2 registered investment companies with approximately $4.53 billion in total assets under management	10 other pooled investment vehicles with approximately $91.42 billion in total assets under management	17 other accounts with approximately $9.72 billion in total assets under management

Keith Carroll	Index 600 Stock Portfolio Index 400 Stock Portfolio	1 registered investment company with approximately $580.3 million in total assets under management	11 other pooled investment vehicles with approximately $20 billion in total assets under management	17 other accounts with approximately $16.3 billion in total assets under management

Compensation of Portfolio Managers

Mason Street Advisors, LLC (“Mason Street Advisors”). Mason Street Advisors has adopted a system of compensation for senior personnel, including those with portfolio management responsibilities, that seeks to attract, motivate, and retain high quality investment personnel. Compensation for Mason Street Advisors’ senior personnel consists primarily of the following three components: a base salary, annual variable compensation and, for certain portfolio managers, long-term variable compensation. Each employee is also eligible to participate in benefit plans and programs available generally to all employees of Northwestern Mutual, the parent company of Mason Street Advisors.

At the end of the year, each employee’s performance is evaluated on a variety of factors including a subjective evaluation of competencies and behaviors deemed important to achieving Mason Street Advisors’ overall business objectives. Subjective criteria may include considerations such as management and supervisory responsibilities, complexity of investment strategies, team building efforts and successes, risk management initiatives and leadership contributions. For those personnel with portfolio management responsibilities, consideration also is given to the historic investment performance of accounts managed by such personnel. However, compensation is not increased or reduced based on a formula tied to actual or comparative investment performance.

Eligibility and participation in the annual and long-term variable compensation programs is determined on a year-to-year basis. When awarded, long-term variable pay grants are credited to a deferred account that accrues interest on the balances.

Brent Schutte, Chief Investment Officer of Mason Street Advisors, and Garrett Aird, Vice President – Investments of Mason Street Advisors, are members of the portfolio management team for the Active/Passive Balanced and Active/Passive Moderate Portfolios. Mr. Schutte is Chief Investment Officer for Northwestern Mutual Wealth Management Company (“NMWMC”), and Mr. Aird is Vice President – Investment Management and Research of NMWMC. NMWMC is a federal savings bank and affiliate of Mason Street Advisors. The compensation for Mr. Schutte and Mr. Aird is paid by NMWMC. NMWMC has adopted a system of compensation for its senior personnel, including those with portfolio management and investment program oversight responsibilities, that seeks to attract, motivate, and retain high quality investment personnel. Compensation for NMWMC’s senior personnel consists primarily of the following three components: a base salary, annual variable compensation and, for certain portfolio managers, long-term variable compensation. Each employee is also eligible to participate in benefit plans and programs available generally to all employees of Northwestern Mutual, the parent company of NMWMC. At the end of the year, each employee’s performance is evaluated on a variety of factors including a subjective evaluation of competencies and behaviors deemed important to achieving NMWMC’s overall business objectives. Subjective criteria may include considerations such as management and supervisory responsibilities, complexity of investment strategies, team building efforts and successes, risk management initiatives and leadership contributions. For those personnel with portfolio management or management oversight responsibilities, consideration also is given to the historic investment performance of managed

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accounts. However, compensation is not increased or reduced based on a formula tied to actual or comparative investment performance. Eligibility and participation in the annual and long-term variable compensation programs is determined on a year-to-year basis. When awarded, long-term variable pay grants are credited to a deferred account that accrues interest on the balances.

abrdn Investments Limited (“abrdn”). abrdn’s remuneration policies are designed to support its business strategy, as a leading international asset manager. The objective is to attract, retain and reward talented individuals for the delivery of sustained, superior returns for abrdn’s clients and shareholders. abrdn operates in a highly competitive international employment market and aims to maintain its strong track record of success in developing and retaining talent.

abrdn’s policy is to recognize corporate and individual achievements each year through an appropriate annual bonus scheme. The bonus is a single, fully discretionary variable pay award. The aggregate value of awards in any year is dependent on the abrdn’s overall performance and profitability. Consideration is also given to the levels of bonuses paid in the market. Individual awards, which are payable to all members of staff, are determined by a rigorous assessment of achievement against defined objectives.

The variable pay award comprises a mixture of cash and a deferred award based on the size of the award. Deferred awards are by default abrdn shares, with an option to put up to 50% of deferral into funds. Overall compensation packages are designed to be competitive relative to the investment management industry.

Base Salary – abrdn’s policy is to pay a fair salary commensurate with the individual’s role, responsibilities, and experience, and having regard to the market rates being offered for similar roles in the asset management sector and other comparable companies. Any increase is generally to reflect inflation and is applied in a manner consistent with other abrdn employees; any other increases must be justified by reference to promotion or changes in responsibilities.

Annual Bonus – The Remuneration Committee of abrdn determines the key performance indicators that will be applied in considering the overall size of the bonus pool. In line with practice amongst other asset management companies, individual bonuses are not subject to an absolute cap. However, the aggregate size of the bonus pool is dependent on the abrdn’s overall performance and profitability. Consideration is also given to the levels of bonuses paid in the market. Individual awards are determined by a rigorous assessment of achievement against defined objectives and are reviewed and approved by the Remuneration Committee.

abrdn has a deferral policy which is intended to assist in the retention of talent and to create additional alignment of executives’ interests with abrdn’s sustained performance and, in respect of the deferral into funds, managed by abrdn, to align the interest of asset managers with our clients.

Staff performance is reviewed formally at least once a year. The review process evaluates the various aspects that the individual has contributed to abrdn, and specifically, in the case of portfolio managers, to the relevant investment team. Discretionary bonuses are based on client service, asset growth and the performance of the respective portfolio manager. Overall participation in team meetings, generation of original research ideas and contribution to presenting the team externally are also evaluated.

In the calculation of a portfolio management team’s bonus, abrdn takes into consideration investment matters (which include the performance of funds, adherence to the company investment process, and quality of company meetings) as well as more subjective issues such as team participation and effectiveness at client presentations through KPI scorecards. To the extent performance is factored in, such performance is not judged against any specific benchmark and is evaluated over the period of a year – January to December. The pre- or after-tax performance of an individual account is not considered in the determination of a portfolio manager’s discretionary bonus; rather the review process evaluates the overall performance of the team for all of the accounts the team manages.

Portfolio manager performance on investment matters is judged over all of the accounts the portfolio manager contributes to and is documented in the appraisal process. A combination of the team’s and individual’s performance is considered and evaluated.

Although performance is not a substantial portion of a portfolio manager’s compensation, abrdn also recognizes that fund performance can often be driven by factors outside one’s control, such as (irrational) markets, and as such pays attention to the effort by portfolio managers to ensure integrity of our core process by sticking to disciplines and processes set, regardless of momentum and ‘hot’ themes. Short-terming is thus discouraged and trading- oriented

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managers will thus find it difficult to thrive in the abrdn environment. Additionally, if any of the aforementioned undue risks were to be taken by a portfolio manager, such trend would be identified via abrdn’s dynamic compliance monitoring system.

In rendering investment management services, the Adviser may use the resources of additional investment adviser subsidiaries of abrdn plc. These affiliates have entered into a memorandum of understanding (“MOU”) pursuant to which investment professionals from each affiliate may render portfolio management, research, or trading services to abrdn clients. Each investment professional who renders portfolio management, research or trading services under a MOU or personnel sharing arrangement (“Participating Affiliate”) must comply with the provisions of the Advisers Act, the 1940 Act, the Securities Act of 1933, as amended, (the “Securities Act”), the Exchange Act, and the Employee Retirement Income Security Act of 1974, and the laws of states or countries in which the Adviser does business or has clients. No remuneration is paid by the fund with respect to the MOU/personnel sharing arrangements.

Allspring Global Investments, LLC. (“Allspring Investments”). The compensation structure for Allspring Investments’ portfolio managers includes a competitive fixed base salary plus variable incentives, payable annually and over a deferred period. Allspring Investments participates in third party investment management compensation surveys for market-based compensation information to help support individual pay decisions and to ensure our compensation is aligned with the marketplace. In addition to investment management compensations surveys, Allspring Investments also considers prior professional experience, tenure, seniority and a portfolio manager’s team size, scope and assets under management when determining their total compensation. In addition, portfolio managers, who meet the eligibility requirements, may participate in Allspring Investments’ 401(k) plan that features a limited matching contribution. Eligibility for and participation in this plan is on the same basis for all employees.

Allspring Investments’ investment incentive program plays an important role in aligning the interests of our portfolio managers, investment team members, clients, and shareholders. Incentive awards for portfolio managers are determined based on a review of relative investment and business/team performance. Investment performance is generally evaluated for 1-, 3-, and 5- year performance results, with a predominant weighting on the 3- and 5- year time periods, versus the relevant benchmarks and/or peer groups consistent with the investment style.

Once determined, incentives are awarded to portfolio managers annually, with a portion awarded as annual cash and a portion awarded as a deferred incentive. The long-term portion of incentives generally carry a pro-rated vesting schedule over a 3-year period. For many of our portfolio managers, Allspring Investments further requires a portion of their annual long-term award be allocated directly into each strategy they manage through a deferred compensation vehicle. In addition, our investment team members who are eligible for long term awards also have the opportunity to invest up to 100% of their awards into investment strategies they support (through a deferred compensation vehicle).

As an independent firm, approximately 20% of Allspring is owned by employees, including portfolio managers.

American Century Investment Management, Inc. (“ACI”). As of December 31, 2023, the portfolio managers’ compensation included a base salary, a bonus, restricted stock plans and deferred compensation plans. The base pay is in the form of a fixed annual salary. A significant portion of portfolio manager compensation takes the form of an annual incentive bonus which is determined by a combination of factors. One factor is investment performance of funds a portfolio manager manages. For most American Century mutual funds, investment performance is measured by a combination of one-, three- and five-year pre-tax performance relative to various benchmarks and/or internally- customized peer groups. The Russell 1000® Value Index is used to measure investment performance for portfolio managers of the Large Company Value Portfolio, and the Russell Mid-Cap® Value Index is used to measure investment performance for portfolio managers of the Mid Cap Value Portfolio. Investment performance is not measured relative to a benchmark for portfolio managers of the Inflation Managed Portfolio. The performance comparison periods may be adjusted based on a fund’s inception date or a portfolio manager’s tenure on the fund. Custom peer groups are constructed using all the funds in the indicated categories as a starting point. Funds are then eliminated from the peer group based on a standardized methodology designed to result in a final peer group that is both more stable over the long term (i.e., has less peer turnover) and that more closely represents the fund’s true peers based on internal investment mandates.

Portfolio managers may have responsibility for multiple American Century products. In such cases, the performance of each is assigned a percentage weight appropriate for the portfolio manager’s relative levels of responsibility.

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Portfolio managers also may have responsibility for other types of managed portfolios or ETFs. This is the case for the Large Company Value Portfolio, the Mid Cap Value Portfolio and the Inflation Managed Portfolio. If the performance of a managed account or EFT is considered for purposes of compensation, it is generally measured via the same criteria as an American Century mutual fund (i.e., relative to the performance of a benchmark and/or peer group). Performance of the Large Company Value Portfolio, the Mid Cap Value Portfolio and the Inflation Managed Portfolio is not separately considered in determining portfolio manager compensation.

A second factor in the bonus calculation relates to the performance of a number of American Century products managed according to one of the following investment disciplines: global growth equity, global value equity, disciplined equity, global fixed-income, and multi-asset strategies. The composite for certain portfolio managers may include multiple disciplines. The performance of American Century ETFs may also be included for certain investment disciplines. Performance is measured for each product individually as described above and then combined to create an overall composite for the product group. These composites may measure one-year performance (equal weighted) or a combination of one-, three- and five-year performance (equal or asset weighted) depending on the portfolio manager’s responsibilities and products managed, and the composite for certain portfolio managers may include multiple disciplines. This feature is designed to encourage effective teamwork among portfolio management teams in achieving long-term investment success for similarly styled portfolios.

Portfolio managers’ bonuses may be discretionary and may be tied to factors such as profitability, or individual performance goals, such as research projects and the development of new products.

Portfolio managers are eligible for grants of restricted stock of American Century Companies, Inc. (“ACC”). These grants are discretionary, and eligibility and availability can vary from year to year. The size of an individual’s grant is determined by individual and product performance as well as other product-specific considerations such as profitability. Grants can appreciate/depreciate in value based on the performance of the ACC stock during the restriction period (generally three to four years).

Portfolio managers are eligible for grants of deferred compensation. These grants are used in very limited situations, primarily for retention purposes. Grants are fixed and can appreciate/depreciate in value based on the performance of the American Century mutual funds in which the portfolio manager chooses to invest them.

BlackRock Advisors, LLC (“BlackRock”). BlackRock’s financial arrangements with its portfolio managers, its competitive compensation and its career path emphasis at all levels reflect the value senior management places on key resources. Compensation may include a variety of components and may vary from year to year based on a number of factors. The principal components of compensation include a base salary, a performance-based discretionary bonus, participation in various benefits programs and one or more of the incentive compensation programs established by BlackRock.

Base Compensation. Generally, portfolio managers receive base compensation based on their position with the firm.

Discretionary Incentive Compensation

Discretionary incentive compensation is a function of several components: the performance of BlackRock, Inc., the performance of the portfolio manager’s group within BlackRock, the investment performance, including risk-adjusted returns, of the firm’s assets under management or supervision by that portfolio manager relative to predetermined benchmarks, and the individual’s performance and contribution to the overall performance of these portfolios and BlackRock. In most cases, these benchmarks are the same as the benchmark or benchmarks against which the performance of the Funds or other accounts managed by the portfolio managers are measured. Among other things, BlackRock’s Chief Investment Officers make a subjective determination with respect to each portfolio manager’s compensation based on the performance of the Funds and other accounts managed by each portfolio manager relative to the various benchmarks. Performance of fixed income and multi-asset class funds is measured on a pre-tax and/or after-tax basis over various time periods including 1-, 3- and 5- year periods, as applicable. Performance of index funds is based on the performance of such funds relative to pre-determined tolerance bands around a benchmark, as applicable. The performance of Ms. Hsui and Messrs. Sietsema and Whitehead is not measured against a specific benchmark.

Distribution of Discretionary Incentive Compensation. Discretionary incentive compensation is distributed to portfolio managers in a combination of cash, deferred BlackRock, Inc. stock awards, and/or deferred cash awards that notionally track the return of certain BlackRock investment products. Portfolio managers receive their annual

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discretionary incentive compensation in the form of cash. Portfolio managers whose total compensation is above a specified threshold also receive deferred BlackRock, Inc. stock awards annually as part of their discretionary incentive compensation. Paying a portion of discretionary incentive compensation in the form of deferred BlackRock, Inc. stock puts compensation earned by a portfolio manager for a given year “at risk” based on BlackRock’s ability to sustain and improve its performance over future periods. In some cases, additional deferred BlackRock, Inc. stock may be granted to certain key employees as part of a long-term incentive award to aid in retention, align interests with long-term shareholders and motivate performance. Deferred BlackRock, Inc. stock awards are generally granted in the form of BlackRock, Inc. restricted stock units that vest pursuant to the terms of the applicable plan and, once vested, settle in BlackRock, Inc. common stock. The portfolio managers of these Funds have deferred BlackRock, Inc. stock awards.For certain portfolio managers, a portion of the discretionary incentive compensation is also distributed in the form of deferred cash awards that notionally track the returns of select BlackRock investment products they manage, which provides direct alignment of portfolio manager discretionary incentive compensation with investment product results. Deferred cash awards vest ratably over a number of years and, once vested, settle in the form of cash. Only portfolio managers who manage specified products and whose total compensation is above a specified threshold are eligible to participate in the deferred cash award program.

Other Compensation Benefits. In addition to base salary and discretionary incentive compensation, portfolio managers may be eligible to receive or participate in one or more of the following:

Incentive Savings Plans — BlackRock, Inc. has created a variety of incentive savings plans in which BlackRock employees are eligible to participate, including a 401(k) plan, the BlackRock Retirement Savings Plan (RSP), and the BlackRock Employee Stock Purchase Plan (ESPP). The employer contribution components of the RSP include a company match equal to 50% of the first 8% of eligible pay contributed to the plan capped at $5,000 per year, and a company retirement contribution equal to 3-5% of eligible compensation up to the Internal Revenue Service limit ($330,000 for 2023). The RSP offers a range of investment options, including registered investment companies and collective investment funds managed by the firm. BlackRock contributions follow the investment direction set by participants for their own contributions or, absent participant investment direction, are invested into a target date fund that corresponds to, or is closest to, the year in which the participant attains age 65. The ESPP allows for investment in BlackRock common stock at a 5% discount on the fair market value of the stock on the purchase date. Annual participation in the ESPP is limited to the purchase of 1,000 shares of common stock or a dollar value of $25,000 based on its fair market value on the purchase date. All of the eligible portfolio managers are eligible to participate in these plans.

Delaware Investments Fund Advisers (“Delaware”). Each portfolio’s manager’s compensation consists of the following:

Base Salary - Each named portfolio manager receives a fixed base salary. Salaries are determined by a comparison to industry data prepared by third parties to ensure that portfolio manager salaries are in line with salaries paid at peer investment advisory firms.

Bonus - Each named portfolio manager is eligible to receive an annual cash bonus. The bonus pool is determined by the revenues associated with the products a portfolio manager manages, including the Domestic Equity Portfolio. Delaware keeps a percentage of the revenues and the remaining percentage of revenues (minus appropriate expenses associated with relevant product and the investment management team) creates the “bonus pool” for the product. Various members of the team, including each of the named portfolio managers of the Domestic Equity Portfolio, have the ability to earn a percentage of the bonus pool. The pool is allotted based on subjective factors and objective factors. The primary objective factor is the one, three and five-year performance of the funds managed relative to the performance of the appropriate Morningstar, Inc. peer groups and the performance of institutional composites relative to the appropriate indices. The comparative indices used to measure portfolio manager compensation for the Domestic Equity Portfolio are the Lipper Large-Cap Value fund universe and the Russell 1000® Value index. Three and five-year performance is weighted more heavily and there is no objective award for a fund whose performance falls below the 50th percentile for a given time period.

Individual allocations of the bonus pool are based on individual performance measurements, both objective and subjective, as determined by senior management.

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Portfolio managers participate in retention programs, including the MAM Notional Investment Plan and the Macquarie Group Employee Retained Equity Plan, for alignment of interest purposes.

MAM Notional Investment Plan – A portion of a portfolio manager’s retained profit share may be notionally exposed to the return of certain Macquarie Asset Management funds pursuant to the terms of the MAM Notional Investment Plan. The retained amount will vest in equal tranches over a period ranging from four to five years after the date of investment (depending on the level of the employee).

Macquarie Group Employee Retained Equity Plan – A portion of a portfolio manager’s retained profit share may be invested in the Macquarie Group Employee Retained Equity Plan (“MEREP”), which is used to deliver remuneration in the form of Macquarie equity. The main type of award currently being offered under the MEREP is units comprising a beneficial interest in a Macquarie share held in a trust for the employee, subject to the vesting and forfeiture provisions of the MEREP. Subject to vesting conditions, vesting and release of the shares occurs in a period ranging from four to five years after the date of investment (depending on the level of the employee).

Other Compensation - Portfolio managers may also participate in benefit plans and programs available generally to all similarly situated employees.

Dodge & Cox. Compensation of Dodge & Cox Funds’ investment committee members includes a base salary, cash bonus, and a package of employee benefits which are generally available to all salaried employees. Compensation is structured to emphasize the success of Dodge & Cox rather than that of any one individual. Dodge & Cox does not have any “incentive compensation” or “deferred compensation” programs. Compensation is not linked to the distribution any product or to the performance of any account. All investment committee members also participate in equity ownership of Dodge & Cox. Each element of compensation is detailed below:

Base Salary. Each investment committee member is paid a fixed base salary which is intended to be competitive in light of each member’s experience and responsibilities.

Bonus. Bonus payments are based on a number of factors including the profitability of Dodge & Cox and the member’s long-term contributions to the firm. Dodge & Cox’s principles emphasize teamwork and a focus on client needs, and bonuses are structured to emphasize those principles. All full-time employees of Dodge & Cox participate in the annual bonus program. Bonuses are not linked to the volume of assets managed or to measurements of relative or absolute investment returns.

Equity Ownership. All investment committee members are shareholders of Dodge & Cox, which is a private, employee-owned S-corporation. A shareholder’s equity interest in Dodge & Cox provides pass-through income of Dodge & Cox’s profits and annual cash distributions based on each shareholder’s proportionate interest. Shareholder distributions are generally determined based on considerations of Dodge & Cox’s working capital requirements, net income generated each year, and estimated tax liabilities associated with the pass-through of Dodge & Cox’s income. Dodge & Cox’s shares are issued and redeemed at book value and may be held only by active employees of the company. Changes in share ownership are controlled by Dodge & Cox’s board of directors, whose decisions regarding share ownership are based on each member’s long-term contributions to the firm. Shareholders also may receive a benefit from the appreciation of the book value of their shares, which may be realized when shares are repurchased by Dodge & Cox from the shareholder.

Employee Benefit Program. Investment committee members participate in benefit plans and programs available generally to all employees, which includes a qualified, defined-contribution profit sharing plan funded at the maximum allowable amount. The above information regarding compensation of investment committee members is current as of December 31, 2023.

Federated Investment Management Company (“Federated”).

Mark Durbiano. Mark Durbiano is paid a fixed base salary and a variable annual incentive. Base salary is determined within a market competitive, position-specific salary range, based on the portfolio manager’s experience and performance. The annual incentive amount is determined based primarily on Investment Product Performance (IPP) and may also include a discretionary component based on a variety of factors deemed relevant, such as financial measures and performance and may be paid entirely in cash, or in a combination of cash and restricted stock of Federated

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Hermes, Inc. (“Federated Hermes”). The total combined annual incentive opportunity is intended to be competitive in the market for this portfolio manager role.

IPP is measured on a rolling one, three and five calendar year pre-tax gross return basis versus the Fund’s benchmark (i.e., Bloomberg U.S. Corporate High Yield 2% Issuer Capped Index) and versus a designated peer group of comparable accounts. Performance periods are adjusted if a portfolio manager has been managing an account for less than five years; accounts with less than one year of performance history under a portfolio manager may be excluded.

As noted above, Mr. Durbiano is also the portfolio manager for other accounts in addition to the Fund. Such other accounts may have different benchmarks and performance measures. The allocation or weighting given to the performance of the Fund or other accounts or activities for which Mr. Durbiano is responsible when his compensation is calculated may be equal or can vary.

In addition, Mr. Durbiano has oversight responsibility for other portfolios that he does not personally manage and serves on one or more Investment Teams that establish guidelines on various performance drivers (e.g., currency, duration, sector, volatility and/or yield curve) for taxable, fixed-income accounts. A portion of the IPP score is based on Federated Hermes’ senior management’s assessment of team contributions.

For purposes of calculating the annual incentive amount, each account managed by the portfolio manager currently is categorized into one of three IPP groups (which may be adjusted periodically). Within each performance measurement period and IPP group, IPP currently is calculated on the basis of an assigned weighting to each account managed or activity engaged in by the portfolio manager and included in the IPP groups. At the account level, the weighting assigned to the Fund is lesser than or equal to the weighting assigned to certain other accounts or activities used to determine IPP (but can be adjusted periodically). A portion of the bonus tied to the IPP score may be adjusted based on management’s assessment of overall contributions to account performance and any other factors as deemed relevant. Pursuant to the terms of a business agreement, Mr. Durbiano’s annual incentives may include certain guaranteed amounts.

Kathryn Glass. Kathryn Glass is paid a fixed base salary and a variable annual incentive. Base salary is determined within a market competitive, position-specific salary range, based on the portfolio manager’s experience and performance. The annual incentive amount is determined based primarily on Investment Product Performance (IPP) and may also include a discretionary component based on a variety of factors deemed relevant, such as financial measures and performance and may be paid entirely in cash, or in a combination of cash and restricted stock of Federated Hermes, Inc. (“Federated Hermes”). The total combined annual incentive opportunity is intended to be competitive in the market for this portfolio manager role.

As noted above, Ms. Glass is also the portfolio manager for other accounts in addition to the Fund. Such other accounts may have different benchmarks and performance measures. The allocation or weighting given to the performance of the Fund or other accounts when his compensation is calculated may be equal or can vary.

For purposes of calculating the annual incentive amount, each account managed by the portfolio manager currently is categorized into one of three IPP groups (which may be adjusted periodically). Within each performance measurement period and IPP group, IPP currently is calculated on the basis of an assigned weighting to each account managed by the portfolio manager and included in the IPP groups. At the account level, the weighting assigned to the Fund is lesser than or equal to the weighting assigned to certain other accounts used to determine IPP (but can be adjusted periodically). Additionally, a portion of Ms. Glass’s IPP score is based on the performance of the accounts for which she provides research and analytic support. A portion of the bonus tied to the IPP score may be adjusted based on management’s assessment of overall contributions to account performance and any other factors as deemed relevant.

Any individual allocations from the discretionary pool may be determined, by executive management on a discretionary basis using various factors, such as, for example, on a product, strategy or asset class basis, and considering overall contributions and any other factors deemed relevant (and may be adjusted periodically).

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In addition, Ms. Glass was awarded a grant of restricted Federated Hermes stock. Awards of restricted stock are discretionary and are made in variable amounts based on the subjective judgment of Federated Hermes’ senior management.

Thomas Scherr. Thomas Scherr is paid a fixed base salary and a variable annual incentive. Base salary is determined within a market competitive, position-specific salary range, based on the portfolio manager’s experience and performance. The annual incentive amount is determined based primarily on Investment Product Performance (IPP) and may also include a discretionary component based on a variety of factors deemed relevant, such as financial measures and performance and may be paid entirely in cash, or in a combination of cash and restricted stock of Federated Hermes, Inc. (“Federated Hermes”). The total combined annual incentive opportunity is intended to be competitive in the market for this portfolio manager role.

As noted above, Mr. Scherr is also the portfolio manager for other accounts in addition to the Fund. Such other accounts may have different benchmarks and performance measures. The allocation or weighting given to the performance of the Fund or other accounts or activities for which Mr. Scherr is responsible when his compensation is calculated may be equal or can vary.

For purposes of calculating the annual incentive amount, each account managed by the portfolio manager currently is categorized into one of three IPP groups (which may be adjusted periodically). Within each performance measurement period and IPP group, IPP currently is calculated on the basis of an assigned weighting to each account managed by the portfolio manager and included in the IPP groups. At the account level, the weighting assigned to the Fund is lesser than or equal to the weighting assigned to certain other accounts or activities and is greater than or equal to the weighting assigned to certain other accounts or activities used to determine IPP (but can be adjusted periodically). Additionally, a portion of Mr. Scherr’s IPP score is based on the performance of the accounts for which he provides research and analytic support. A portion of the bonus tied to the IPP score may be adjusted based on management’s assessment of overall contributions to account performance and any other factors as deemed relevant.

In addition, Mr. Scherr was awarded a grant of restricted Federated Hermes stock. Awards of restricted stock are discretionary and are made in variable amounts based on the subjective judgment of Federated Hermes’ senior management.

Randal Stuckwish. Randal Stuckwish is paid a fixed base salary and a variable annual incentive. Base salary is determined within a market competitive, position-specific salary range, based on the portfolio manager’s experience and performance. The annual incentive amount is determined based primarily on Investment Product Performance (IPP) and may also include a discretionary component based on a variety of factors deemed relevant, such as financial measures and performance and may be paid entirely in cash, or in a combination of cash and restricted stock of Federated Hermes, Inc. (“Federated Hermes”). The total combined annual incentive opportunity is intended to be competitive in the market for this portfolio manager role.

As noted above, Mr. Stuckwish is also the portfolio manager for other accounts in addition to the Fund. Such other accounts may have different benchmarks and performance measures. The allocation or weighting given to the performance of the Fund or other accounts for which Mr. Stuckwish is responsible when his compensation is calculated may be equal or can vary.

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For purposes of calculating the annual incentive amount, each account managed by the portfolio manager currently is categorized into one of three IPP groups (which may be adjusted periodically). Within each performance measurement period and IPP group, IPP currently is calculated on the basis of an assigned weighting to each account managed by the portfolio manager and included in the IPP groups. At the account level, the weighting assigned to the Fund is lesser than or equal to the weighting assigned to certain other accounts used to determine IPP (but can be adjusted periodically). Additionally, a portion of Mr. Stuckwish’s IPP score is based on the performance of the accounts for which he provides research and analytic support. A portion of the bonus tied to the IPP score may be adjusted based on management’s assessment of overall contributions to account performance and any other factors as deemed relevant.

In addition, Mr. Stuckwish was awarded a grant of restricted Federated Hermes stock. Awards of restricted stock are discretionary and are made in variable amounts based on the subjective judgment of Federated Hermes’ senior management.

FIAM LLC (“FIAM”). Jed Weiss is the portfolio manager of the International Growth Portfolio and receives compensation for his services. Portfolio manager compensation generally consists of a fixed base salary determined periodically (typically annually), a bonus, in certain cases, participation in several types of equity-based compensation plans, and, if applicable, relocation plan benefits. A portion of each portfolio manager’s compensation may be deferred based on criteria established by FIAM or at the election of the portfolio manager.

The portfolio manager’s base salary is determined by level of responsibility and tenure at FIAM or its affiliates. The primary components of the portfolio manager’s bonus are based (i) on the pre-tax investment performance of the portfolio manager’s fund(s), accounts and lead account(s) measured against a benchmark index and within a defined peer group assigned to each fund, account or lead account, if applicable and (ii) the investment performance of other equity funds and accounts. The pre-tax investment performance of the portfolio manager’s fund(s), accounts and lead account(s) is weighted according to the portfolio manager’s tenure on those fund(s), accounts and lead account(s) and the average asset size of those fund(s), accounts and lead account(s) over the portfolio manager’s tenure. Each component is calculated separately over the portfolio manager’s tenure on those funds, accounts and lead account(s) over a measurement period that initially is contemporaneous with the portfolio manager’s tenure, but that eventually encompasses rolling periods of up to five years for the comparison to a benchmark index and rolling periods of up to three years for the comparison to a peer group, if applicable. A smaller, subjective component of the portfolio manager’s bonus is based on the portfolio manager’s overall contribution to and leadership within the FIAM investment platform. The portion of the portfolio manager’s bonus that is linked to the investment performance of the strategy is based on the lead account’s pre-tax investment performance of the strategy measured against the MSCI EAFE Growth Index (Net MA Tax), and the lead account’s pre-tax investment performance within the Morningstar Foreign Large Growth Category. The portfolio manager also is compensated under equity based compensation plans linked to increases or decreases in the net asset value of the stock of FMR LLC, FIAM’s ultimate parent company. FMR LLC is a diverse financial services company engaged in various activities that include fund management, brokerage, retirement, and employer administrative services. If requested to relocate their primary residence, portfolio managers also may be eligible to receive benefits, such as home sale assistance and payment of certain moving expenses, under relocation plans for most full-time employees of FIAM and its affiliates.

J.P. Morgan Investment Management, Inc. JPMIM’s compensation programs are designed to align the behavior of employees with the achievement of its short- and long-term strategic goals, which revolve around client investment objectives. This is accomplished in part, through a balanced performance assessment process and total compensation program, as well as a clearly defined culture that rigorously and consistently promotes adherence to the highest ethical standards.

The compensation framework for JPMIM Portfolio Managers participating in public market investing activities is based on several factors that drive alignment with client objectives, the primary of which is investment performance, alongside of the firm-wide performance dimensions. The framework focuses on Total Compensation – base salary and variable compensation. Variable compensation is in the form of cash incentives, and/or long-term incentives in the form of fund-tracking incentives (referred to as the “Mandatory Investment Plan” or “MIP”) and/or equity-based JPMorgan Chase

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Restricted Stock Units (“RSUs”) with defined vesting schedules and corresponding terms and conditions. Long-term incentive awards may comprise up to 60% of overall incentive compensation, depending on an employee’s pay level.

The performance dimensions for Portfolio Managers are evaluated annually based on several factors that drive investment outcomes and value—aligned with client objectives—including, but not limited to:

• Investment performance, generally weighted more to the long-term, with specific consideration for Portfolio Managers of investment performance relative to competitive indices or peers over one-, three-, five- and ten-year periods, or, in the case of funds designed to track the performance of a particular index, the Portfolio Managers success in tracking such index;

• The scale and complexity of their investment responsibilities;

• Individual contribution relative to the client’s risk and return objectives;

• Business results, as informed by investment performance; risk, controls and conduct objectives; client/customer/stakeholder objectives, teamwork and leadership objectives; and

• Adherence with JPMorgan’s compliance, risk, regulatory and client fiduciary responsibilities, including, as applicable, adherence to the JPMorgan Asset Management Sustainability Risk Integration Policy, which contains relevant financially material Environmental, Social and Corporate Governance (“ESG”) factors that are intended to be assessed in investment decision- making.

In addition to the above performance dimensions, the firm-wide pay-for-per performance framework is integrated into the final assessment of incentive compensation for an individual Portfolio Manager. Feedback from JPMorgan’s risk and control professionals is considered in assessing performance and compensation.

Portfolio Managers are subject to a mandatory deferral of long-term incentive compensation under JPMorgan’s “MIP”. In general, the MIP provides for a rate of return equal to that of the particular fund(s), thereby aligning the Portfolio Manager’s pay with that of the client’s experience/return.

For Portfolio Managers participating in public market investing activities, 50% of their long-term incentives are subject to a mandatory deferral in the MIP, and the remaining 50% can be granted in the form of RSUs or additional participation in MIP at the election of the Portfolio Manager.

For the portion of long-term incentives subject to mandatory deferral in the MIP (50%), the incentives are allocated to the fund(s) the Portfolio Manager manages, as determined by the employee’s respective manager and reviewed by senior management.).

In addition, named Portfolio Managers on a sustainable fund(s) are required to allocate at least 25% of their mandatory deferral in at least one dedicated sustainable fund(s).

To hold individuals responsible for taking risks inconsistent with JPMorgan’s risk appetite and to discourage future imprudent behavior, we have policies and procedures that enable us to take prompt and proportionate actions with respect to accountable individuals, including:

• Reducing or altogether eliminating annual incentive compensation;

• Canceling unvested awards (in full or in part);

• Clawback/recovery of previously paid compensation (cash and / or equity);

• Demotion, negative performance rating or other appropriate employment actions; and

• Termination of employment.

The precise actions we take with respect to accountable individuals are based on circumstances, including the nature of their involvement, the magnitude of the event and the impact on JPMorgan.

In evaluating each portfolio manager’s performance with respect to the accounts he or she manages, JPMorgan uses the following index as a benchmarks to evaluate the performance of the portfolio managers with respect to the account:]

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Name of Fund	Benchmark
Northwestern Mutual Series Fund, Inc. Large Cap Blend Portfolio	S&P 500 Index (Gross Return in USD)

Loomis, Sayles & Company, L.P. (“Loomis Sayles”). Loomis Sayles believes that portfolio manager compensation should be driven primarily by the delivery of consistent and superior long-term performance for its clients. Mr. Hamzaogullari’s compensation has four components: a competitive base salary, an annual incentive bonus driven by investment performance, participation in a long-term incentive plan (with an annual and a post-retirement payout), and a revenue sharing bonus if certain revenue thresholds and performance hurdles are met. Maximum variable compensation potential is a multiple of base salary and reflects performance achievements relative to peers with similar disciplines. The performance review considers the asset class, manager experience, and maturity of the product. The incentive compensation is based on trailing strategy performance and is weighted at one third for the three-year period, one third for the five-year period and one third for the ten-year period. He also receives performance based compensation as portfolio manager for a private investment fund. The firm’s senior management reviews the components annually.

In addition, Mr. Hamzaogullari participates in the Loomis Sayles profit sharing plan, in which Loomis Sayles makes a contribution to the retirement plan of each employee based on a percentage of base salary (up to a maximum amount). He may also participate in the Loomis Sayles deferred compensation plan which requires all employees to defer 50% of their annual bonus if in excess of a certain dollar amount, except for those employees who will be age 61 or older on the date the bonus is awarded. These amounts are deferred over a two year period with 50% being paid out one year from the bonus anniversary date and the second 50% being paid out two years from the bonus anniversary date. These deferrals are deposited into an investment account on the employee's behalf, but the employee must be with Loomis Sayles on the vesting dates in order to receive the deferred bonus.

Massachusetts Financial Services Company (MFS®). MFS’ philosophy is to align portfolio manager compensation with the goal to provide shareholders with long-term value through a collaborative investment process. Therefore, MFS uses long-term investment performance as well as contribution to the overall investment process and collaborative culture as key factors in determining portfolio manager compensation. In addition, MFS seeks to maintain total compensation programs that are competitive in the asset management industry in each geographic market where it has employees. MFS uses competitive compensation data to ensure that compensation practices are aligned with its goals of attracting, retaining, and motivating the highest-quality professionals.

MFS reviews portfolio manager compensation annually. In determining portfolio manager compensation, MFS uses quantitative means and qualitative means to help ensure a durable investment process. As of December 31, 2024, portfolio manager total cash compensation is a combination of base salary and performance bonus:

Base Salary. Base salary generally represents a smaller percentage of portfolio manager total cash compensation than performance bonus.

Performance Bonus. Generally, the performance bonus represents more than a majority of portfolio manager total cash compensation.

The performance bonus is based on the results of an annual internal peer review process (conducted by other portfolio managers, analysts, traders, and non-investment personnel) and management’s assessment of overall portfolio manager contribution to the client experience, the investment process and overall performance (distinct from fund and other account performance).

The performance bonus may be in the form of cash and/or a deferred cash award, at the discretion of management. A deferred cash award is issued for a cash value and becomes payable over a three-year vesting period if the portfolio manager remains in the continuous employ of MFS or its affiliates. During the vesting period, the value of the unfunded deferred cash award will fluctuate as though the portfolio manager had invested the cash value of the award in an MFS fund(s) selected by the portfolio manager. A selected fund may, but is not required to, be a fund that is managed by the portfolio manager.

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MFS Equity Plan – Portfolio managers also typically benefit from the opportunity to participate in the MFS Equity Plan. Equity interests are awarded by management, on a discretionary basis, taking into account tenure at MFS, contribution to the investment process, and other factors.

Finally, portfolio managers also participate in benefit plans (including a defined contribution plan and health and other insurance plans) and programs available generally to other employees of MFS. The percentage such benefits represent of any portfolio manager’s compensation depends upon the length of the individual’s tenure at MFS and salary level, as well as other factors.

Northern Trust Investments, Inc. (“Northern Trust”). The compensation for Northern Trust portfolio managers is based on the competitive marketplace and consists of a fixed base salary plus a variable annual cash incentive award. In addition, non-cash incentives, such as stock options or restricted stock of Northern Trust Corporation, may be awarded from time to time. The annual cash incentive award is discretionary and is based on a quantitative and qualitative evaluation of each portfolio manager’s investment performance and contribution to his or her respective product team plus the financial performance of the investment business unit and Northern Trust Corporation as a whole. In addition, the annual cash incentive award for portfolio managers is not based on the investment performance of the funds or the amount of assets held in the funds. Moreover, no material differences exist between the compensation structure for mutual fund accounts and other types of accounts.

Pacific Investment Management Company LLC (“PIMCO”). PIMCO’s and its affiliates’ approach to compensation seeks to provide professionals with a compensation process that is driven by values of collaboration, openness, responsibility and excellence.

Generally, compensation packages consist of three components. The compensation program for portfolio managers is designed to align with clients’ interests, emphasizing each portfolio manager’s ability to generate long-term investment success for clients, among other factors. A portfolio manager’s compensation is not based solely on the performance of the Fund or any other account managed by that portfolio manager:

Base Salary – Base salary is determined based on core job responsibilities, positions/levels and market factors. Base salary levels are reviewed annually, when there is a significant change in job responsibilities or position, or a significant change in market levels.

Variable Compensation – In addition to a base salary, portfolio managers have a variable component of their compensation, which is based on a combination of individual and company performance and includes both qualitative and quantitative factors. The following non-exhaustive list of qualitative and quantitative factors is considered when determining total compensation for portfolio managers:

•

performance measured over a variety of longer- and shorter-term periods, including 5- year, 4-year, 3-year, 2- year and 1-year dollar-weighted and account-weighted, pre-tax total and risk-adjusted investment performance as judged against the applicable benchmarks (which may include internal investment performance-related benchmarks) for each account managed by a portfolio manager (including the Fund(s)) and relative to applicable industry peer groups; and

•

amount and nature of assets managed by the portfolio manager.

The variable compensation component of an employee’s compensation may include a deferred component. The deferred portion will generally be subject to vesting and may appreciate or depreciate based on the performance of PIMCO and/or its affiliates. PIMCO’s Long-Term Incentive Plan provides participants with deferred cash awards that appreciate or depreciate based on PIMCO’s operating earnings over a rolling three-year period. Additionally, PIMCO's Carried Interest Plan provides eligible participants (i.e. those who provide services to PIMCO’s alternative funds) a percentage of the carried interest otherwise payable to PIMCO if the applicable performance measurements described in the alternative fund's partnership agreements are achieved.

Portfolio managers who are Managing Directors of PIMCO receive compensation from a non-qualified profit sharing plan consisting of a portion of PIMCO’s net profits. Portfolio managers who are Managing Directors receive an amount determined by the Compensation Committee, based upon an individual’s overall contribution to the firm.

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T. Rowe Price Associates, Inc. (“T. Rowe Price”). Portfolio manager compensation consists primarily of a base salary, a cash bonus, and an equity incentive that usually comes in the form of restricted stock grants. Compensation is variable and is determined based on the following factors.

Investment performance over 1-, 3-, 5-, and 10-year periods is the most important input. The weightings for these time periods are generally balanced and are applied consistently across similar strategies. T. Rowe Price (and Price Hong Kong, Price Singapore, Price Japan, T. Rowe Price International, and T. Rowe Price Investment Management, as appropriate) evaluates performance in absolute, relative, and risk-adjusted terms. Relative performance and risk-adjusted performance are typically determined with reference to the broad-based index (e.g., S&P 500 Index) and the Lipper average or index (e.g., Large-Cap Growth Index) set forth in the total returns table in the fund’s prospectus, although other benchmarks may be used as well. Investment results are also measured against comparably managed funds of competitive investment management firms. The selection of comparable funds is approved by the applicable investment steering committee and is the same as the selection presented to the directors of the T. Rowe Price funds in their regular review of fund performance. Performance is primarily measured on a pretax basis, although tax efficiency is considered.

The table below indicates the primary performance benchmarks used to determine portfolio manager compensation. Compensation is generally based on the performance of a similarly managed portfolio. T. Rowe Price may also consider other broad-based market benchmarks to evaluate portfolio manager performance and determine compensation.

Portfolio	Benchmark
Growth Stock	Russell Growth 1000 Index
Equity Income	Lipper Equity Income Funds Average, Morningstar Large Value, Russell 1000 Value Index
Short-Term Bond	Bloomberg 1-3 Year U.S. Government/Credit Bond Index

Compensation is viewed with a long-term time horizon. The more consistent a portfolio manager’s performance over time, the higher the compensation opportunity. The increase or decrease in a fund’s assets due to the purchase or sale of fund shares is not considered a material factor. In reviewing relative performance for fixed income funds, a fund’s expense ratio is usually taken into account. Contribution to T. Rowe Price’s overall investment process is an important consideration as well. Leveraging ideas and investment insights across applicable investment platform; working effectively with and mentoring others; and other contributions to our clients, the firm, or our culture are important components of T. Rowe Price’s long-term success and are generally taken into consideration.

All employees of T. Rowe Price, including portfolio managers, can participate in a 401(k) plan sponsored by T. Rowe Price Group. In addition, all employees are eligible to purchase T. Rowe Price common stock through an employee stock purchase plan that features a limited corporate matching contribution. Eligibility for and participation in these plans is on the same basis for all employees. Finally, all vice presidents of T. Rowe Price Group, including all portfolio managers, receive supplemental medical/hospital reimbursement benefits and are eligible to participate in a supplemental savings plan sponsored by T. Rowe Price Group.

This compensation structure is used when evaluating the performance of all portfolios (including the T. Rowe Price funds) managed by the portfolio manager.

T. Rowe Price Investment Management, Inc. (“TRPIM”). Portfolio manager compensation consists primarily of a base salary, a cash bonus, and an equity incentive that usually comes in the form of a restricted stock grant. Compensation is variable and is determined based on the following factors.

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investment steering committee and is the same as the selection presented to the directors of the T. Rowe Price funds in their regular review of fund performance. Performance is primarily measured on a pretax basis, although tax efficiency is considered.

Portfolio	Benchmark
Small Cap Value	Lipper Small Cap Value Funds Average, Morningstar Small Value, Russell 2000 Value Index

Compensation is viewed with a long-term time horizon. The more consistent a portfolio manager’s performance over time, the higher the compensation opportunity. The increase or decrease in a fund’s assets due to the purchase or sale of fund shares is not considered a material factor. In reviewing relative performance for fixed income funds, a fund’s expense ratio is usually taken into account. Contribution to T. Rowe Price’s overall investment process is an important consideration as well. Leveraging ideas and investment insights across the applicable investment platforms; working effectively with and mentoring others; and other contributions to our clients, the firm, or our culture are important components of T. Rowe Price’s long-term success and are generally taken into consideration.

This compensation structure is used when evaluating the performance of all portfolios (including the T. Rowe Price funds) managed by the portfolio manager.

Wellington Management Company LLP (“Wellington Management”). Wellington Management receives a fee based on the assets under management of the fund as set forth in the Investment Sub-Advisory Agreements between Wellington Management and Mason Street Advisors, LLC related to Small Cap Growth, Large Cap Core Stock and Mid Cap Growth Stock Portfolios. Wellington Management pays its investment professionals out of its total revenues, including the advisory fees earned with respect to the each Fund. The following information is as of December 31, 2023.

Wellington Management’s compensation structure is designed to attract and retain high-caliber investment professionals necessary to deliver high quality investment management services to its clients. Wellington Management’s compensation of each Fund’s managers listed in the Fund's prospectus who are primarily responsible for the day-to-day investment management of the Funds (the “Portfolio Managers”) includes a base salary and incentive components. The base salary for each Portfolio Manager who is a partner (a “Partner”) of Wellington Management Group LLP, the ultimate holding company of Wellington Management, is generally a fixed amount that is determined by the managing partners of Wellington Management Group LLP. The base salary for other Portfolio Managers is determined by the Portfolio Manager’s experience and performance in his role as a Portfolio Manager. Base salaries for Wellington Management’s employees are reviewed annually and may be adjusted based on the recommendation of a Portfolio Manager’s manager, using guidelines established by Wellington Management’s Compensation Committee, which has final oversight responsibility for base salaries of employees of the firm. Each Portfolio Manager, with the exception of Mary Pryshlak and Jon White, is eligible to receive an incentive payment based on the revenues earned by Wellington Management from the fund managed by the Portfolio Manager and generally each other account managed by such Portfolio Manager. Each Portfolio Manager’s incentive payment relating to the Fund is linked to the gross pre-tax performance of the fund Portfolio managed by the Portfolio Manager compared to the benchmark index and/or peer group identified below over one, three and five year periods, with an emphasis on five year results. Wellington Management applies similar incentive compensation structures (although the benchmarks or peer groups, time periods and rates may differ) to other accounts managed by the Portfolio Managers, including accounts with performance fees.

Portfolio-based incentives across all accounts managed by an investment professional can, and typically do, represent a significant portion of an investment professional’s overall compensation; incentive compensation varies significantly by

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individual and can vary significantly from year to year. The Portfolio Managers may also be eligible for bonus payments based on their overall contribution to Wellington Management’s business operations. Senior management at Wellington Management may reward individuals as it deems appropriate based on other factors. Each Partner is eligible to participate in a Partner-funded tax qualified retirement plan, the contributions to which are made pursuant to an actuarial formula. Ms. Pryshlak is a Partner.

Fund	Benchmark Index and/or Peer Group for Incentive Period
Small Cap Growth Stock Portfolio	Russell 2000 Growth Index
Mid Cap Growth Stock Portfolio	Russell MidCap® Growth Index

Conflicts of Interest

Mason Street Advisors, LLC (“Mason Street Advisors”). Conflicts of interest may arise when a portfolio manager is responsible for the management of more than one account. The principal types of these potential conflicts may include:

Time and Attention. The management of multiple Portfolios and/or accounts may give rise to potential conflicts of interest as the portfolio manager must allocate his or her time and investment ideas across multiple Portfolios and accounts. This could result in a portfolio manager devoting unequal time and attention to the management of Portfolios and/or other accounts. The effect of this potential conflict may be more pronounced where Portfolios and/or accounts overseen by a particular portfolio manager have different objectives, benchmarks, time horizons, and fees.

Limited Investment Opportunities. If a portfolio manager identifies a limited investment opportunity that may be suitable for multiple Portfolios and/or accounts, the opportunity may be allocated among these several Portfolios or accounts, which may limit a Portfolio’s ability to take full advantage of the investment opportunity. Mason Street Advisors seeks to manage such potential conflicts by using procedures intended to provide a fair allocation of buy and sell opportunities among Portfolios and other accounts.

Variation in Incentives. A conflict of interest may arise where the financial or other benefits available to the portfolio manager differ among the Portfolios and/or accounts that he or she manages. If the structure of the investment adviser’s management fee and/or the portfolio manager’s compensation differs among Portfolios and/or accounts (such as where certain Portfolios or accounts pay higher management fees), the portfolio manager might be motivated to favor certain Portfolios and/or accounts over others. In addition, the portfolio manager might be motivated to favor Portfolios and/or accounts in which he or she has an interest or in which the investment adviser and/or its affiliates have interests. Similarly, the desire to maintain assets under management or to enhance the portfolio manager’s performance record or to derive other rewards, financial or otherwise, could influence the portfolio manager in affording preferential treatment to those Portfolios and/or accounts that could most significantly benefit the portfolio manager. Mason Street Advisors has adopted Guidelines for Business Conduct that establish the standards of business conduct that Mason Street Advisors requires of its portfolio managers. Mason Street Advisors has implemented an Investment Committee, which is responsible for evaluating and mitigating investment-related conflicts of interest.

Compensation Methodology. For portfolio managers who are serve in roles for more than one entity, the methodology used to determine the portfolio manager’s compensation could create a potential incentive for the portfolio manager to focus more on the success of one entity over the other, or use his or her role with one entity for the primary benefit of the other entity, which might not be in the best interest of the Portfolios and/or accounts the portfolio manager manages for Mason Street Advisors. Northwestern Mutual has a process for allocating time and expenses for officers of more than one subsidiary entity. For information regarding the compensation policies of Mason Street Advisors, please refer to the section of this Appendix D called “Compensation of Portfolio Managers.”

Personal Accounts. Portfolio managers may be permitted to purchase and sell securities for their own personal accounts or the personal accounts of family members, which could potentially influence the portfolio manager’s decisions with respect to purchasing or selling the same securities for a Portfolio. To mitigate this potential conflict of interest, Mason Street Advisors has adopted a Code of Ethics and other policies and procedures governing the personal securities transactions of its portfolio managers, which are designed to place the interests of the Portfolios before the interests of Mason Street Advisors, its employees and its related persons.

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Differing Strategies. At times, a portfolio manager may determine that an investment opportunity may be appropriate for only some of the Portfolios and/or accounts for which he or she exercises investment responsibility, or may decide that certain of the Portfolios and/or accounts should take differing positions with respect to a particular security. In these cases, the portfolio manager may place separate transactions for one or more Portfolios or accounts which may affect the market price of the security or the execution of the transaction, or both, to the detriment or benefit of one or more other Portfolios and/or accounts. As noted above, Mason Street Advisors seeks to manage such potential conflicts by using procedures intended to provide a fair allocation of buy and sell opportunities among Portfolios and other accounts.

Brent Schutte and Garrett Aird are members of the portfolio management team for the Active/Passive Balanced and Active/Passive Moderate Portfolios. Mr. Schutte, in his capacity as Chief Investment Officer and Chief Strategist of NMWMC, and Mr. Aird, in his capacity as Vice President, Investment Management and Research of NMWMC, both oversee and manage the investment advisory programs offered by NMWMC. Mr. Schutte and Mr. Aird have responsibilities that vary across each of the NMWMC advisory programs, but include duties related to investment selection, portfolio construction, performance and risk attribution analysis, and overall investment strategy. Investment decisions and strategies pursued across the NMWMC advisory programs may differ from the decisions and strategies implemented by Mr. Schutte and Mr. Aird in their capacity as portfolio managers of the Active/Passive Balanced and Active/Passive Moderate Portfolios. Mr. Schutte’s and Mr. Aird’s service for multiple entities creates potential conflicts of interest. Mason Street Advisors has adopted Guidelines for Business Conduct that establish the standards of business conduct that Mason Street Advisors requires of its portfolio managers. Mason Street Advisors has implemented an Investment Committee, which includes members who are not officers of both Mason Street Advisors and NMWMC. Mason Street Advisors’ Investment Committee is responsible for evaluating and mitigating investment-related conflicts of interest.

Mason Street Advisors and the Fund have adopted compliance policies and procedures, as applicable, and have implemented committee structures that are designed to review and address these, and other, types of conflicts of interest. Mason Street Advisors addresses conflicts related to the management of more than one account in its overall compliance program, including within its Conflicts of Interest Policy, Personal Trading Policy, Trade Allocation Policies and Procedures, Policies and Procedures on Transactions with Affiliates and Cross Transactions, Guidelines for Business Conduct, Policy Statement on Insider Trading, Policies and Procedures for Client Commission Arrangements, and Proxy Voting Policies and Procedures. These policies are designed to reasonably ensure that various conflicts are identified and managed, and that Mason Street Advisor’s clients are treated fairly and equitably. In addition, Sub-advisers may face similar conflicts related to management of more than one account. Each Sub-adviser considers its own business to identify and manage any potential conflicts related to management of more than one account arising out of its own client base. There is no guarantee, however, that any such policies and procedures will be able to detect and/or prevent every situation where a conflict arises.

abrdn Investments Limited (“abrdn”). The portfolio managers’ management of “other accounts” may give rise to potential conflicts of interest in connection with their management of the Emerging Markets Equity Portfolio’s investments, on the one hand, and the investments of the other accounts, on the other. The other accounts may have the same investment objective as the Emerging Markets Equity Portfolio. Therefore, a potential conflict of interest may arise as a result of the identical investment objectives, whereby the portfolio manager could favor one account over another. However, abrdn believes that these risks are mitigated by the fact that: (i) accounts with like investment strategies managed by a particular portfolio manager are generally managed in a similar fashion, subject to exceptions to account for particular investment restrictions or policies applicable only to certain accounts, differences in cash flows and account sizes, and similar factors; and (ii) portfolio manager personal trading is monitored to avoid potential conflicts. In addition, abrdn has adopted trade allocation procedures that require equitable allocation of trade orders for a particular security among participating accounts.

In some cases, another account managed by the same portfolio manager may compensate abrdn based on the performance of the portfolio held by that account. The existence of such a performance-based fee may create additional conflicts of interest for the portfolio manager in the allocation of management time, resources and investment opportunities.

Another potential conflict could include instances in which securities considered as investments for the Emerging Markets Equity Portfolio also may be appropriate for other investment accounts managed by abrdn or its affiliates. In the instance that the same security is bought or sold for a number of clients at approximately the same time, orders may

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also be aggregated to the extent appropriate. We seek to allocate opportunities to all clients in a consistent, fair manner. In accordance with our written policies and procedures, we may take special considerations when deciding on allocations, provided they are deemed fair and equitable to all clients. As a result of the allocations, there may be instances where the Emerging Markets Equity Portfolio will not participate in a transaction that is allocated among other accounts. While these aggregation and allocation policies could have a detrimental effect on the price or amount of the securities available to the Emerging Markets Equity Portfolio from time to time, abrdn has adopted policies that are designed to eliminate or minimize conflicts of interest, although there is no guarantee that procedures adopted under such policies will detect each and every situation in which a conflict arises.

Allspring Global Investments, LLC (“Allspring Investments”). Allspring Investments’ Portfolio Managers often provide investment management for separate accounts advised in the same or similar investment style as that provided to mutual funds. While management of multiple accounts could potentially lead to conflicts of interest over various issues such as trade allocation, fee disparities and research acquisition, Allspring Investments has implemented policies and procedures for the express purpose of ensuring that clients are treated fairly and that potential conflicts of interest are minimized.

The Portfolio Managers face inherent conflicts of interest in their day-to-day management of the funds and other accounts because the funds may have different investment objectives, strategies, and risk profiles than the other accounts managed by the Portfolio Managers. For instance, to the extent that the Portfolio Managers manage accounts with different investment strategies than the funds, they may from time to time be inclined to purchase securities, including initial public offerings, for one account but not for a fund. Additionally, some of the accounts managed by the Portfolio Managers may have different fee structures, including performance fees, which are or have the potential to be higher or lower, in some cases significantly higher or lower, than the fees paid by the funds. The differences in fee structures may provide an incentive to the Portfolio Managers to allocate more favorable trades to the higher-paying accounts.

To minimize the effects of these inherent conflicts of interest, Allspring Investments has adopted and implemented policies and procedures, including brokerage and trade allocation policies and procedures, that they believe address the potential conflicts associated with managing portfolios for multiple clients and are designed to ensure that all clients are treated fairly and equitably. Accordingly, security block purchases are allocated to all accounts with similar objectives in a fair and equitable manner. Furthermore, Allspring Investments has adopted a Code of Ethics under Rule 17j-1 under the 1940 Act and Rule 204A-1 under the Investment Advisers Act of 1940 (the “Advisers Act”) to address potential conflicts associated with managing the funds and any personal accounts the Portfolio Managers may maintain.

American Century Investment Management, Inc. (“ACI”). Certain conflicts of interest may arise in connection with the management of multiple portfolios. Potential conflicts include, for example, conflicts among investment strategies, such as one portfolio buying or selling a security while another portfolio has a differing, potentially opposite position in such security. This may include one portfolio taking a short position in the security of an issuer that is held long in another portfolio (or vice versa). Other potential conflicts may arise with respect to the allocation of investment opportunities, which are discussed in more detail below. ACI has adopted policies and procedures that are designed to minimize the effects of these conflicts.

Responsibility for managing ACI client portfolios is organized according to investment discipline. Investment disciplines include, for example, disciplined equity, global growth equity, global value equity, global fixed income, multi-asset strategies, exchange traded funds, and Avantis Investors funds. Within each discipline are one or more portfolio teams responsible for managing specific client portfolios. Generally, client portfolios with similar strategies are managed by the same team using the same objective, approach, and philosophy. Accordingly, portfolio holdings, position sizes, and industry and sector exposures tend to be similar across similar portfolios, which minimizes the potential for conflicts of interest. In addition, ACI maintains an ethical wall that restricts real time access to information regarding any portfolio’s transaction activities and positions to team members that have responsibility for a given portfolio or are within the same equity investment discipline. The ethical wall is intended to aid in preventing the misuse of portfolio holdings information and trading activity in the other disciplines.

For each investment strategy, one portfolio is generally designated as the “policy portfolio.” Other portfolios with similar investment objectives, guidelines and restrictions, if any, are referred to as “tracking portfolios.” When managing policy and tracking portfolios, a portfolio team typically purchases and sells securities across all portfolios that the team manages. ACI’s trading systems include various order entry programs that assist in the management of multiple

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portfolios, such as the ability to purchase or sell the same relative amount of one security across several funds. In some cases a tracking portfolio may have additional restrictions or limitations that cause it to be managed separately from the policy portfolio. Portfolio managers make purchase and sale decisions for such portfolios alongside the policy portfolio to the extent the overlap is appropriate, and separately, if the overlap is not.

ACI may aggregate orders to purchase or sell the same security for multiple portfolios when it believes such aggregation is consistent with its duty to seek best execution on behalf of its clients. Orders of certain client portfolios may, by investment restriction or otherwise, be determined not available for aggregation. ACI has adopted policies and procedures to minimize the risk that a client portfolio could be systematically advantaged or disadvantaged in connection with the aggregation of orders. To the extent equity trades are aggregated, shares purchased or sold are generally allocated to the participating portfolios pro rata based on order size. Because initial public offerings (IPOs) are usually available in limited supply and in amounts too small to permit across-the-board pro rata allocations, ACI has adopted special procedures designed to promote a fair and equitable allocation of IPO securities among clients over time. A centralized trading desk executes all fixed income securities transactions for Avantis ETFs and mutual funds. For all other funds in American Century complex, portfolio teams are responsible for executing fixed income trades with broker/dealers in a predominantly dealer marketplace. Trade allocation decisions are made by the portfolio manager at the time of trade execution and orders entered on the fixed income order management system. There is an ethical wall between the Avantis trading desk and all other American Century traders. The Advisor’s Global Head of Trading monitors all trading activity for best execution and to make sure no set of clients is being systematically disadvantaged..

Finally, investment of ACI’s corporate assets in proprietary accounts may raise additional conflicts of interest. To mitigate these potential conflicts of interest, ACI has adopted policies and procedures intended to provide that trading in proprietary accounts is performed in a manner that does not give improper advantage to ACI to the detriment of client portfolios.

BlackRock Advisors, LLC (“BlackRock”). BlackRock has built a professional working environment, firm-wide compliance culture and compliance procedures and systems designed to protect against potential incentives that may favor one account over another. BlackRock has adopted policies and procedures that address the allocation of investment opportunities, execution of portfolio transactions, personal trading by employees and other potential conflicts of interest that are designed to ensure that all client accounts are treated equitably over time. Nevertheless, BlackRock furnishes investment management and advisory services to numerous clients in addition to the Fund, and BlackRock may, consistent with applicable law, make investment recommendations to other clients or accounts (including accounts which are hedge funds or have performance or higher fees paid to BlackRock, or in which portfolio managers have a personal interest in the receipt of such fees), which may be the same as or different from those made to the Fund. In addition, BlackRock, its affiliates and significant shareholders and any officer, director, shareholder or employee may or may not have an interest in the securities whose purchase and sale BlackRock recommends to the Fund. BlackRock, or any of its affiliates or significant shareholders, or any officer, director, shareholder, employee or any member of their families may take different actions than those recommended to the Fund by BlackRock with respect to the same securities. Moreover, BlackRock may refrain from rendering any advice or services concerning securities of companies of which any of BlackRock’s (or its affiliates’ or significant shareholders’) officers, directors or employees are directors or officers, or companies as to which BlackRock or any of its affiliates or significant shareholders or the officers, directors and employees of any of them has any substantial economic interest or possesses material non-public information. Certain portfolio managers also may manage accounts whose investment strategies may at times be opposed to the strategy utilized for a fund. It should also be noted that a portfolio manager may be managing hedge fund and/or long only accounts, or may be part of a team managing hedge fund and/or long only accounts, subject to incentive fees. Such portfolio managers may therefore be entitled to receive a portion of any incentive fees earned on such accounts. Currently, the portfolio managers of these funds are not entitled to receive a portion of incentive fees of other accounts.

As a fiduciary, BlackRock owes a duty of loyalty to its clients and must treat each client fairly. When BlackRock purchases or sells securities for more than one account, the trades must be allocated in a manner consistent with its fiduciary duties. BlackRock attempts to allocate investments in a fair and equitable manner among client accounts, with no account receiving preferential treatment. To this end, BlackRock has adopted policies that are intended to ensure reasonable efficiency in client transactions and provide BlackRock with sufficient flexibility to allocate investments in a manner that is consistent with the particular investment discipline and client base, as appropriate.

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Delaware Investments Fund Advisers (“Delaware”). Individual portfolio managers may perform investment management services for other funds or accounts similar to those provided to the Domestic Equity Portfolio and the investment action for each such other fund or account and the Domestic Equity Portfolio may differ. For example, an account or fund may be selling a security, while another account or fund may be purchasing or holding the same security. As a result, transactions executed for one fund or account may adversely affect the value of securities held by another fund, account, or the Portfolio.

Additionally, the management of multiple funds or accounts and the Portfolio may give rise to potential conflicts of interest, as a portfolio manager must allocate time and effort to multiple funds or accounts and the Portfolio. A portfolio manager may discover an investment opportunity that may be suitable for more than one account or fund. The investment opportunity may be limited, however, so that all funds or accounts for which the investment would be suitable may not be able to participate. Delaware has adopted procedures designed to allocate investments fairly across multiple funds and accounts.

Some of the accounts managed by a portfolio manager may have performance-based fees. This compensation structure presents a potential conflict of interest because a portfolio manager has an incentive to manage these accounts so as to enhance their performance, to the possible detriment of other accounts for which Delaware does not receive a performance-based fee.

A portfolio manager's management of personal accounts also may present certain conflicts of interest. While Delaware’s Code of Ethics is designed to address these potential conflicts, there is no guarantee that it will do so.

Dodge & Cox. Potential conflicts of interest may arise in connection with the management of multiple accounts, including potential conflicts of interest related to the knowledge and timing of trades, investment opportunities, broker selection, and investments. Because of their roles at Dodge & Cox, investment committee members, research analysts, and other Dodge & Cox employees may be privy to the size, timing and possible market impact of the Portfolio’s trades. It is possible that investment committee members could use this information to the advantage of other accounts they manage and to the possible detriment of the Portfolio. It is possible that an investment opportunity may be suitable for both the Portfolio and other accounts managed by investment committee members or a Dodge & Cox proprietary account, but may not be available in sufficient quantities for both the Portfolio and the other accounts to participate fully. Similarly, there may be limited opportunity to sell an investment held by the Portfolio and another account. Dodge & Cox has adopted procedures for allocating portfolio transactions and investment opportunities across multiple client accounts on a fair and equitable basis over time. With respect to securities transactions for the Portfolio, Dodge & Cox determines which broker to use to execute each order, consistent with its duty to seek best execution of the transaction. Conflicts of interest may also arise in cases where Dodge & Cox clients with different strategies invest in different parts of an issuer’s capital structure, such as when one client owns debt obligations of an issuer and another client owns equity in the same issuer.

The Portfolio may invest in various publicly traded or restricted securities that are also owned by Dodge & Cox or its employees. Dodge & Cox is not obligated to purchase or sell for the Portfolio any security which Dodge & Cox or its employees purchase or sell for their own account(s) or for the account of any other client. Dodge & Cox may give advice and take action with respect to any of its clients or for its own account which differs from or is inconsistent with the timing or nature of action(s) taken for the Portfolio. Transactions in a specific security may not be recommended or effected for all client accounts for which such transaction will be recommended or effected at the same time or at the same price. Dodge & Cox employees may invest in the same securities that Dodge & Cox purchases for its clients to the extent permitted by the Dodge & Cox Code of Ethics. The Code of Ethics requires preclearance of personal securities transactions and reduces conflicts of interest by restricting the type and timing of employee trades. Dodge & Cox research analysts are sometimes invited to events hosted by company management in conjunction with performing their research responsibilities, which could provide an incentive for them to favor those companies over other investments. Acceptance of any gifts and entertainment is subject to restrictions set forth in Dodge & Cox’s Code of Ethics.

Although in some cases Dodge & Cox may refrain from taking certain actions or making investments on behalf of clients because of conflicts (potentially disadvantaging those on whose behalf the actions are not taken or investments not made), in other cases Dodge & Cox may take actions or make investments on behalf of some clients that have the potential to disadvantage other clients. Any of the foregoing conflicts of interest will be reviewed on a case-by-case basis. Any review will take into consideration the interests of the relevant clients, the circumstances giving rise to the conflict, and applicable laws. Clients should be aware that conflicts will not necessarily be resolved in favor of their

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interests, and Dodge & Cox will attempt to resolve such matters fairly, but even fair resolution may be resolved in favor of other clients which pay Dodge & Cox higher fees. The resolution of any actual or potential conflict of interest may result in Dodge & Cox’s making investment decisions for clients or groups of clients on less favorable terms than it would have absent the conflict.

Federated Investment Management Company (“Federated”). As a general matter, certain conflicts of interest may arise in connection with a portfolio manager's management of a fund's investments, on the one hand, and the investments of other funds/pooled investment vehicles or accounts (collectively, including the Fund, as applicable, “accounts”) for which the portfolio manager is responsible, on the other. For example, it is possible that the various products managed could have different investment strategies that, at times, might conflict with one another to the possible detriment of the Fund. Alternatively, to the extent that the same investment opportunities might be desirable for more than one account, possible conflicts could arise in determining how to allocate them. Other potential conflicts can include, for example, conflicts created by specific portfolio manager compensation arrangements (including, for example, the allocation or weighting given to the performance of the Fund or other accounts or activities for which the portfolio manager is responsible in calculating the portfolio manager's compensation), and conflicts relating to selection of brokers or dealers to execute Fund portfolio trades and/or specific uses of commissions from Fund portfolio trades (for example, research or “soft dollars”). Federated has adopted policies and procedures and has structured the portfolio managers' compensation in a manner reasonably designed to safeguard the Fund from being negatively affected as a result of any such potential conflicts.

FIAM LLC (“FIAM”). A portfolio manager’s compensation plan may give rise to potential conflicts of interest. Although investors in a fund may invest through either tax-deferred accounts or taxable accounts, a portfolio manager’s compensation is linked to the pre-tax performance of the fund, rather than its after-tax performance. A portfolio manager’s base pay tends to increase with additional and more complex responsibilities that include increased assets under management and a portion of the bonus relates to marketing efforts, which together indirectly link compensation to sales. When a portfolio manager takes over a fund or an account, the time period over which performance is measured may be adjusted to provide a transition period in which to assess the portfolio. The management of multiple funds and accounts (including proprietary accounts) may give rise to potential conflicts of interest if the funds and accounts have different objectives, benchmarks, time horizons, and fees as a portfolio manager must allocate his or her time and investment ideas across multiple funds and accounts. In addition, a fund’s trade allocation policies and procedures may give rise to conflicts of interest if the fund’s orders do not get fully executed due to being aggregated with those of other accounts managed by FIAM or an affiliate. A portfolio manager may execute transactions for another fund or account that may adversely impact the value of securities held by a fund. Securities selected for other funds or accounts may outperform the securities selected for the fund. Portfolio managers may be permitted to invest in the funds they manage, even if a fund is closed to new investors. Trading in personal accounts, which may give rise to potential conflicts of interest, is restricted by a fund’s Code of Ethics.

Portfolio managers may receive interests in certain funds or accounts managed by FMR or one of its affiliated advisers (collectively, “Proprietary Accounts”). A conflict of interest situation is presented where a portfolio manager considers investing a client account in securities of an issuer in which FMR, its affiliates or their (or their fund clients’) respective directors, officers or employees already hold a significant position for their own account, including positions held indirectly through Proprietary Accounts. Because the 1940 Act, as well as other applicable laws and regulations, restricts certain transactions between affiliated entities or between an advisor and its clients, client accounts managed by FIAM or its affiliates, including accounts sub-advised by third parties, are, in certain circumstances, prohibited from participating in offerings of such securities (including initial public offerings and other offerings occurring before or after an issuer’s initial public offering) or acquiring such securities in the secondary market. For example, ownership of a company by Proprietary Accounts has, in certain situations, resulted in restrictions on FMR’s and its affiliates’ client accounts’ ability to acquire securities in the company’s initial public offering and subsequent public offerings, private offerings, and in the secondary market, and additional restrictions could arise in the future; to the extent such client accounts acquire the relevant securities after such restrictions are subsequently lifted, the delay could affect the price at which the securities are acquired.

A conflict of interest situation is presented when FIAM or its affiliates acquire, on behalf of their client accounts, securities of the same issuers whose securities are already held in Proprietary Accounts, because such investments could have the effect of increasing or supporting the value of the Proprietary Accounts. A conflict of interest situation also arises when FIAM investment advisory personnel consider whether client accounts they manage should invest in an

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investment opportunity that they know is also being considered by an affiliate of FIAM for a Proprietary Account, to the extent that not investing on behalf of such client accounts improves the ability of the Proprietary Account to take advantage of the opportunity. FIAM and its affiliates have adopted policies and procedures and maintain a compliance program designed to help manage such actual and potential conflicts of interest.

J.P. Morgan Investment Management, Inc. The potential for conflicts of interest exists when portfolio managers manage other accounts with similar investment objectives and strategies as the fund (“Similar Accounts”). Potential conflicts may include, for example, conflicts between investment strategies and conflicts in the allocation of investment opportunities.

Responsibility for managing J.P. Morgan Investment Management Inc. (JP Morgan)’s and its affiliates clients’ portfolios is organized according to investment strategies within asset classes. Generally, client portfolios with similar strategies are managed by portfolio managers in the same portfolio management group using the same objectives, approach and philosophy. Underlying sectors or strategy allocations within a larger portfolio are likewise managed by portfolio managers who use the same approach and philosophy as similarly managed portfolios. Therefore, portfolio holdings, relative position sizes and industry and sector exposures tend to be similar across similar portfolios and strategies, which minimize the potential for conflicts of interest.

JPMorgan and/or its affiliates (“JPMorgan Chase”) perform investment services, including rendering investment advice, to varied clients. JPMorgan, JPMorgan Chase and its or their directors, officers, agents, and/or employees may render similar or differing investment advisory services to clients and may give advice or exercise investment responsibility and take such other action with respect to any of its other clients that differs from the advice given or the timing or nature of action taken with respect to another client or group of clients. It is JPMorgan’s policy, to the extent practicable, to allocate, within its reasonable discretion, investment opportunities among clients over a period of time on a fair and equitable basis. One or more of JPMorgan’s other client accounts may at any time hold, acquire, increase, decrease, dispose, or otherwise deal with positions in investments in which another client account may have an interest from time-to-time.

Acting for Multiple Clients. In general, JPMIM faces conflicts of interest when it renders investment advisory services to several clients and, from time to time, provides dissimilar investment advice to different clients. For example, when funds or accounts managed by JPMIM (“Other Accounts”) engage in short sales of the same securities held by a Fund, JPMIM could be seen as harming the performance of a Fund for the benefit of the Other Accounts engaging in short sales, if the short sales cause the market value of the securities to fall. In addition, a conflict could arise when one or more Other Accounts invest in different instruments or classes of securities of the same issuer than those in which a Fund invests. In certain circumstances, Other Accounts have different investment objectives or could pursue or enforce rights with respect to a particular issuer in which a Fund has also invested and these activities could have an adverse effect on the Fund. For example, if a Fund holds debt instruments of an issuer and an Other Account holds equity securities of the same issuer, then if the issuer experiences financial or operational challenges, the Fund (which holds the debt instrument) may seek a liquidation of the issuer, whereas the Other Account (which holds the equity securities) may prefer a reorganization of the issuer. In addition, an issuer in which the Fund invests may use the proceeds of the Fund’s investment to refinance or reorganize its capital structure which could result in repayment of debt held by JPMorgan or an Other Account. If the issuer performs poorly following such refinancing or reorganization, the Fund’s results will suffer whereas the Other Account’s performance will not be affected because the Other Account no longer has an investment in the issuer. Conflicts are magnified with respect to issuers that become insolvent. It is possible that in connection with an insolvency, bankruptcy, reorganization, or similar proceeding, a Fund will be limited (by applicable law, courts or otherwise) in the positions or actions it will be permitted to take due to other interests held or actions or positions taken by JPMorgan or Other Accounts JPMorgan, JPMorgan Chase, and any of its or their directors, partners, officers, agents or employees, may also buy, sell, or trade securities for their own accounts or the proprietary accounts of JPMorgan and/or JPMorgan Chase. JPMorgan and/or JPMorgan Chase, within their discretion, may make different investment decisions and other actions with respect to their own proprietary accounts than those made for client accounts, including the timing or nature of such investment decisions or actions. Further, JPMorgan is not required to purchase or sell for any client account securities that it, JPMorgan Chase, and any of its or their employees, principals, or agents may purchase or sell for their own accounts or the proprietary accounts of JPMorgan, or JPMorgan Chase or its clients. JP Morgan and/or its affiliates may receive more compensation with respect to certain Similar Accounts than that received with respect to the fund or may receive compensation based in part on the performance of certain Similar Accounts. This may create a potential conflict of interest for JP Morgan and its affiliates

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or its portfolio managers by providing an incentive to favor these Similar Accounts when, for example, placing securities transactions. In addition, JP Morgan or its affiliates could be viewed as having a conflict of interest to the extent that JP Morgan or an affiliate has a proprietary investment in Similar Accounts, the portfolio managers have personal investments in Similar Accounts or the Similar Accounts are investment options in JP Morgan’s or its affiliate’s employee benefit plans. Potential conflicts of interest may arise with both the aggregation and allocation of securities transactions and allocation of investment opportunities because of market factors or investment restrictions imposed upon JP Morgan and its affiliates by law, regulation, contract or internal policies. Allocations of aggregated trades, particularly trade orders that were only partially completed due to limited availability and allocation of investment opportunities generally, could raise a potential conflict of interest, as JP Morgan or its affiliates may have an incentive to allocate

securities that are expected to increase in value to favored accounts. Initial public offerings, in particular, are frequently of very limited availability. JP Morgan and its affiliates may be perceived as causing accounts they manages to participate in an offering to increase JP Morgan’s or its affiliates’ overall allocation of securities in that offering.

A potential conflict of interest also may be perceived to arise if transactions in one account closely follow related transactions in a different account, such as when a purchase increases the value of securities previously purchased by another account, or when a sale in one account lowers the sale price received in a sale by a second account. If JP Morgan or its affiliates manage accounts that engage in short sales of securities of the type in which the fund invests, JP Morgan or its affiliates could be seen as harming the performance of the fund for the benefit of the accounts engaging in short sales if the short sales cause the market value of the securities to fall.

As an internal policy matter, JP Morgan may from time to time maintain certain overall investment limitations on the securities positions or positions in other financial instruments JP Morgan or its affiliates will take on behalf of its various clients due to, among other things, liquidity concerns and regulatory restrictions. Such policies may preclude a fund from purchasing particular securities or financial instruments, even if such securities or financial instruments would otherwise meet the fund’s objectives.

The goal of JP Morgan and its affiliates is to meet their fiduciary obligation with respect to all clients. JP Morgan and its affiliates have policies and procedures that seek to manage conflicts. JP Morgan and its affiliates monitor a variety of areas, including compliance with fund guidelines, review of allocation decisions and compliance with JP Morgan’s Codes of Ethics and JPMC’s Code of Conduct. With respect to the allocation of investment opportunities, JP Morgan and its affiliates also have certain policies designed to achieve fair and equitable allocation of investment opportunities among its clients over time. For example:

Orders received in the same security and within a reasonable time period from a market event (e.g., a change in a security rating) are continuously aggregated on the appropriate trading desk so that new orders are aggregated with current outstanding orders, consistent with JPMorgan’s duty of best execution for its clients. However, there are circumstances when it may be appropriate to execute the second order differently due to other constraints or investment objectives. Such exceptions often depend on the asset class. Examples of these exceptions, particularly in the fixed-income area, are sales to meet redemption deadlines or orders related to less liquid assets.

If aggregated trades are fully executed, accounts participating in the trade will typically be allocated their pro rata share on an average price basis. Partially filled orders generally will be allocated among the participating accounts on a pro-rata average price basis, subject to certain limited exceptions. Use of average price for execution of aggregated trade orders is particularly true in the equity area. However, certain investment strategies, such as the use of derivatives, or asset classes, such as fixed-income that use individual trade executions due to the nature of the strategy or supply of the security, may not be subject to average execution price policy and would receive the actual execution price of the transaction. Additionally, some accounts may be excluded from pro rata allocations. Accounts that would receive a de minimis allocation relative to their size may be excluded from the order. Another exception may occur when thin markets or price volatility require that an aggregated order be completed in multiple executions over several days. Deviations from pro rata allocations are documented by the business. JPMorgan attempts to mitigate any potential unfairness by basing non-pro-rata allocations traded through a single trading desk or system upon an objective predetermined criteria for the selection of investments and a disciplined process for allocating securities with similar duration, credit quality and liquidity in the good faith judgment of JPMorgan so that fair and equitable allocation will occur over time.

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Purchases of money market instruments and fixed income securities cannot always be allocated pro-rata across the accounts with the same investment strategy and objective. However, the Adviser and its affiliates attempt to mitigate any potential unfairness by basing non-pro rata allocations traded through a single trading desk or system upon objective predetermined criteria for the selection of investments and a disciplined process for allocating securities with similar duration, credit quality and liquidity in the good faith judgment of the Adviser or its affiliates so that fair and equitable allocation will occur over time.

Loomis, Sayles & Company, L.P. (“Loomis Sayles”). Conflicts of interest may arise in the allocation of investment opportunities and the allocation of aggregated orders among the Funds and other accounts managed by the Portfolio Managers. A Portfolio Manager potentially could give favorable treatment to some accounts for a variety of reasons, including favoring larger accounts, accounts that pay higher fees, accounts that pay performance-based fees, accounts of affiliated companies and accounts in which the Portfolio Manager has an interest. In addition, due to differences in the investment strategies or restrictions among a Fund and a Portfolio Manager’s other accounts, the Portfolio Manager may take action with respect to another account that differs from the action taken with respect to the Portfolio. Although such favorable treatment could lead to more favorable investment opportunities or allocations for some accounts and may appear to create additional conflicts of interest for the Portfolio Manager in the allocation of management time and resources, Loomis Sayles strives to ensure that Portfolio Managers endeavor to exercise their discretion in a manner that is equitable to all interested persons. Furthermore, Loomis Sayles makes investment decisions for all accounts (including institutional accounts, mutual funds, hedge funds and affiliated accounts) based on each account’s investment objective, investment guidelines and restrictions, the availability of other comparable investment opportunities and Loomis Sayles’ desire to treat all accounts fairly and equitably over time. Loomis Sayles maintains Trade Allocation and Aggregation Policies and Procedures to mitigate the effects of these potential conflicts as well as other types of conflicts of interest. However, there is no guarantee that such procedures will detect each and every situation where a conflict arises or that Loomis Sayles will treat all accounts identically. Conflicts of interest also arise to the extent a Portfolio Manager short sells a stock or otherwise takes a short position in one client account but holds that stock long in other accounts, including the Portfolio, or sells a stock for some accounts while buying the stock for others, and through the use of “soft dollar arrangements,” which are discussed in Loomis Sayles’ Brokerage Allocation Policies and Procedures and Loomis Sayles’ Trade Aggregation and Allocation Policies and Procedures.

Massachusetts Financial Services Company (MFS®). MFS seeks to identify potential conflicts of interest resulting from a portfolio manager’s management of both the Portfolio and other accounts, and has adopted policies and procedures reasonably designed to address such potential conflicts. There is no guarantee that MFS will be successful in identifying or mitigating conflicts of interest.

The management of multiple funds and accounts (including accounts in which MFS, or an affiliate, an employee, an officer, or a director has an interest) gives rise to conflicts of interest if the funds and accounts have different objectives and strategies, benchmarks, time horizons and fees, as a portfolio manager must allocate his or her time and investment ideas across multiple funds and accounts. In certain instances, there are securities which are suitable for the Portfolio’s portfolio as well as for one or more other accounts advised by MFS or its subsidiaries (including accounts in which MFS, or an affiliate, an employee, an officer, or a director has an interest). MFS’ trade allocation policies could have a detrimental effect on the Portfolio if the Portfolio's orders do not get fully executed or are delayed in getting executed due to being aggregated with those of other accounts advised by MFS or its subsidiaries. A portfolio manager may execute transactions for another fund or account that may adversely affect the value of the Portfolio’s investments. Investments selected for funds or accounts other than the Portfolio may outperform investments selected for the Portfolio.

When two or more accounts are simultaneously engaged in the purchase or sale of the same security, the securities are allocated among clients in a manner believed by MFS to be fair and equitable to each over time. Allocations may be based on many factors and may not always be pro rata based on assets managed. The allocation methodology could have a detrimental effect on the price or availability of a security with respect to the Portfolio.

MFS and/or a portfolio manager may have a financial incentive to allocate favorable or limited opportunity investments or structure the timing of investments to favor accounts other than the Portfolio; for instance, those that pay a higher advisory fee and/or have a performance adjustment, those that include an investment by the portfolio manager, and/or those in which MFS, its affililates, its employees, its officers, and/or directors, and/or its affiliates own or have an interest.

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To the extent permitted by applicable law, certain accounts may invest their assets in other accounts advised by MFS or its affiliates, including accounts that are advised by one or more of the same portfolio manager(s), which could result in conflicts of interest relating to asset allocation, timing of purchases and redemptions, and increased profitability for MFS, its affiliates, and/or its personnel, including portfolio managers.

Northern Trust Investments, Inc. (“Northern Trust”). Northern Trust’s portfolio managers are often responsible for managing other account portfolios, including exchange-traded funds, separate accounts and other pooled investment vehicles, in addition to the respective fund that they manage.

A fund’s manager may manage various client accounts that may have materially higher or lower fee arrangements than a fund. The side-by-side management of these accounts may raise potential conflicts of interest relating to cross trading, the allocation of investment opportunities and the aggregation and allocation of trades. In addition, while portfolio managers generally only manage accounts with similar investment strategies, it is possible that due to varying investment restrictions among accounts that certain investments are made for some accounts and not others or conflicting investment positions are taken among accounts. Some portfolio managers may be dual officers of one or more Northern Trust affiliates and undertake investment advisory duties for the affiliates. The portfolio managers have a responsibility to manage all client accounts in a fair and equitable manner. Northern Trust seeks to provide best execution of all securities transactions and aggregate and then allocate securities to client accounts in a fair and timely manner. To this end, Northern Trust has developed policies and procedures designed to mitigate and manage the potential conflicts of interest that may arise from side-by-side management. Northern Trust may invest client accounts in affiliated investment pools. If appropriate and consistent with the client’s investment objectives and applicable law, Northern Trust may recommend to clients investment pools in which it or an affiliate provides services for a fee. Northern Trust has an incentive to allocate investments to these types of affiliated investment pools in order to generate additional fees for Northern Trust or its affiliates. In addition, Northern Trust could direct its best investment ideas to these investment products or investment pools to the potential disadvantage of the funds.

As Northern Trust becomes aware of additional potential or actual conflicts of interest, they will be reviewed on case-by-case basis.

Northern Trust manages its client accounts consistent with applicable law and follows its own policies and procedures that are reasonably designed to treat clients fairly and to prevent any client or group of clients from being systematically favored or disadvantaged.

Northern Trust provides advice and makes investment decisions for client accounts that it believes are consistent with each client’s stated investment objectives and guidelines. Advice given to clients or investment decisions made for clients may differ from, or may conflict with, advice given or investment decisions made for clients of an Northern Trust affiliate. Conflicts may also arise because portfolio decisions regarding the Trust may benefit Northern Trust or its affiliates or another account or fund managed by Northern Trust or its affiliates. Actions taken with respect to Northern Trust’s and its affiliates’ other funds or accounts managed by them may adversely impact the funds, and actions taken by the funds may benefit Northern Trust or its affiliates or their other funds or accounts. Northern Trust may also invest in the same securities that it or its affiliates recommend to clients. When Northern Trust or an affiliate currently holds for its own benefit the same securities as a client, it could be viewed as having a potential conflict of interest.

From time to time, securities to be sold on behalf of a client may be suitable for purchase by another client. In such instances, if Northern Trust determines in good faith that the transaction is in the best interest of each client, it may arrange for the securities to be crossed between client accounts at an independently determined fair market value and in compliance with the 1940 Act, if applicable. Cross-trades present conflicts of interest, as there may be an incentive for Northern Trust to favor one client to the disadvantage of another. Cross-trades are only effected as permitted under applicable law and regulation and consistent with the client’s guidelines, with any restrictions. Northern Trust does not receive fees or commissions for these transactions. Northern Trust and the Trust have adopted policies on cross-trades that may be effected between the funds and another client account. Northern Trust conducts periodic reviews of trades for consistency with these policies.

Northern Trust has established certain policies and procedures designed to address conflicts of interest that may arise between its employees and clients as well as between clients and Northern Trust or its affiliates. Northern Trust’s employees must act in the best interests of its clients and generally do not have knowledge of proprietary trading positions or certain other operations of affiliates.

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Receipt of research from brokers who execute client transactions involve conflicts of interest. To the extent that Northern Trust uses commissions to obtain research services for Northern Trust or TNTC, Northern Trust or TNTC will receive a benefit as it will not have to pay for the research, products or services itself. Northern Trust may, therefore, have an incentive to select or recommend a broker-dealer based on its interest in receiving research rather than in obtaining the lowest commission rate on the transaction. Northern Trust or TNTC may also obtain research services from brokerage commissions incurred by client accounts that may not directly benefit such client accounts. Similarly, clients may benefit from research even if trades placed on their behalf did not contribute to the compensation of the broker dealer providing such research. Northern Trust and TNTC do not seek to allocate research services to client accounts proportionately to the commissions that the client accounts generate.

Also, Northern Trust and TNTC may receive products and services that are mixed use. In these cases, Northern Trust or TNTC will use commissions to pay only for the eligible portion of the product or service that assists Northern Trust or TNTC in the investment decision-making process. Any ineligible portion of the product will be paid directly by Northern Trust or TNTC. Northern Trust or TNTC makes a good faith effort to reasonably allocate such items and keeps records of such allocations although clients should be aware of the potential conflicts of interest.

Pacific Investment Management Company LLC (“PIMCO”). From time to time, potential and actual conflicts of interest may arise between a portfolio manager’s management of the investments of a Portfolio, on the one hand, and the management of other accounts, on the other. Potential and actual conflicts of interest may also arise as a result of PIMCO’s other business activities and PIMCO’s possession of material non-public information (“MNPI”) about an issuer. Other accounts managed by a portfolio manager might have similar investment objectives or strategies as the Portfolios, track the same index a Portfolio tracks or otherwise hold, purchase, or sell securities that are eligible to be held, purchased or sold by the Portfolios. The other accounts might also have different investment objectives or strategies than the Portfolios. Investors should be aware that investments made by a Portfolio and the results achieved by a Portfolio at any given time are not expected to be the same as those made by other funds for which PIMCO acts as investment adviser, including funds with names, investment objectives and policies, and/or portfolio management teams, similar to a Portfolio. This may be attributable to a wide variety of factors, including, but not limited to, the use of a different strategy or portfolio management team when a particular fund commenced operations or the size of a particular fund, in each case as compared to other similar funds. Potential and actual conflicts of interest may also arise as a result of PIMCO serving as investment adviser to accounts that invest in the Portfolios or to accounts in which a Portfolio invests. In this case, such conflicts of interest could in theory give rise to incentives for PIMCO to, among other things, vote proxies, purchase or redeem shares of the underlying account, or take other actions with respect to the underlying account, in a manner beneficial to the investing account and/or PIMCO but detrimental to the underlying account. Such conflicts of interest could similarly in theory give rise to incentives for PIMCO to, among other things, vote proxies or purchase or redeem shares of the underlying account, or take other actions with respect to the underlying account, in a manner beneficial to the underlying account and/or PIMCO and that may or may not be detrimental to the investing account. For example, even if there is a fee waiver or reimbursement in place relating to a Portfolio’s investment in an underlying account, or relating to an investing account’s investment in a Portfolio, this will not necessarily eliminate all conflicts of interest, as PIMCO could nevertheless have a financial incentive to favor investments in PIMCO-affiliated funds and managers (for example, to increase the assets under management of PIMCO or a fund, product or line of business, or otherwise provide support to, certain funds, products or lines of business), which could also impact the manner in which certain transaction fees are set. Conversely, PIMCO’s duties to the Portfolios, as well as regulatory or other limitations applicable to the Portfolios, may affect the courses of action available to PIMCO-advised accounts (including certain Portfolios) that invest in the Portfolios in a manner that is detrimental to such investing accounts. In addition, regulatory restrictions, actual or potential conflicts of interest or other considerations may cause PIMCO to restrict or prohibit participation in certain investments. To the extent portfolio managers of a Portfolio or other PIMCO-sponsored account acting as investing account come into possession of MNPI regarding a Portfolio that is a current or potential underlying account in connection with their official duties (including potentially serving as portfolio manager of one or more such underlying accounts), portfolio managers of the Portfolio (or other PIMCO-sponsored account) acting as investing account may not base trading decisions for such investing accounts on MNPI relating to any Portfolio acting as underlying account.

Because PIMCO is affiliated with Allianz SE, a large multi-national financial institution (together with its affiliates, “Allianz”), conflicts similar to those described below may occur between the Portfolios or other accounts managed by PIMCO and PIMCO’s affiliates or accounts managed by those affiliates. Those affiliates (or their clients), which

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generally operate autonomously from PIMCO, may take actions that are adverse to the Portfolios or other accounts managed by PIMCO. In many cases, PIMCO will not be in a position to mitigate those actions or address those conflicts, which could adversely affect the performance of the Portfolios or other accounts managed by PIMCO (each, a “Client,” and collectively, the “Clients”). In addition, because certain Clients are affiliates of PIMCO or have investors who are affiliates or employees of PIMCO, PIMCO may have incentives to resolve conflicts of interest in favor of these Clients over other Clients.

Knowledge and Timing of Portfolio Trades. A potential conflict of interest may arise as a result of a portfolio manager’s day-to-day management of a Portfolio. Because of their positions with the Portfolios, the portfolio managers know the size, timing and possible market impact of a Portfolio’s trades. It is theoretically possible that the portfolio managers could use this information to the advantage of other accounts they manage and to the possible detriment of a Portfolio.

Cross Trades. A potential conflict of interest may arise in instances where the Portfolio buys an instrument from a Client or sells an instrument to a Client (each, a “cross trade”). Such conflicts of interest may arise, among other reasons, as a result of PIMCO representing the interests of both buying party and the selling party in the cross trade or because the price at which the instrument is bought or sold through a cross trade may not be as favorable as the price that might have been obtained had the trade been executed in the open market. PIMCO effects cross trades when appropriate pursuant to procedures adopted under applicable rules and SEC guidance. Among other things, such procedures require that the cross trade is consistent with the respective investment policies and investment restrictions of both parties and is in the best interests of both the buying and selling accounts.

Selection of Service Providers. PIMCO, its affiliates and its employees may have relationships with service providers that recommend, or engage in transactions with or for, a Portfolio, and these relationships may influence PIMCO’s selection of these service providers for a Portfolio. Additionally, as a result of these relationships, service providers may have conflicts that create incentives for them to promote the Portfolio over other funds or financial products. In such circumstances, there is a conflict of interest between PIMCO and a Portfolio if the Portfolios determine not to engage or continue to engage these service providers.

Investment Opportunities. A potential conflict of interest may arise as a result of a portfolio manager’s management of a number of accounts with varying investment guidelines. Often, an investment opportunity may be suitable for one or more Clients, but may not be available in sufficient quantities for all accounts to participate fully. In addition, regulatory issues applicable to PIMCO or one or more Portfolios or other accounts may result in certain Portfolios not receiving securities that may otherwise be appropriate for them. Similarly, there may be limited opportunity to sell an investment held by a Portfolio and another Client. PIMCO has adopted policies and procedures reasonably designed to allocate investment opportunities on a fair and equitable basis over time.

PIMCO seeks to allocate orders across eligible Client accounts with similar investment guidelines and investment styles fairly and equitably, taking into consideration relevant factors including, among others, applicable investment restrictions and guidelines, including regulatory restrictions; Client account-specific investment objectives, restrictions and other Client instructions, as applicable; risk tolerances; amounts of available cash; the need to rebalance a Client account’s portfolio (e.g., due to investor contributions and redemptions); whether the allocation would result in a Client account receiving a trivial amount or an amount below the established minimum quantity; regulatory requirements; the origin of the investment; the bases for an issuer’s allocation to PIMCO; and other Client account-specific factors. As part of PIMCO’s trade allocation process, portions of new fixed income investment opportunities are distributed among Client account categories where the relevant portfolio managers seek to participate in the investment. Those portions are then further allocated among the Client accounts within such categories pursuant to PIMCO’s trade allocation policy. Portfolio managers managing quantitative strategies and specialized accounts, such as those focused on international securities, mortgage-backed securities, bank loans, or other specialized asset classes, will likely receive an increased distribution of new fixed income investment opportunities where the investment involves a quantitative strategy or specialized asset class that matches the investment objective or focus of the Client account category. PIMCO seeks to allocate fixed income investments to Client accounts with the general purpose of maintaining consistent concentrations across similar accounts and achieving, as nearly as possible, portfolio characteristic parity among such accounts. Client accounts furthest from achieving portfolio characteristic parity typically receive priority in allocations. With respect to an order to buy or sell an equity security in the secondary market, PIMCO seeks to allocate the order across Client accounts with similar investment guidelines and investment styles fairly and equitably over time, taking into consideration the relevant factors discussed above.

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Any particular allocation decision among Client accounts may be more or less advantageous to any one Client or group of Clients, and certain allocations will, to the extent consistent with PIMCO’s fiduciary obligations, deviate from a pro rata basis among Clients in order to address for example, differences in legal, tax, regulatory, risk management, concentration, exposure, Client guideline limitations and/or mandate or strategy considerations for the relevant Clients. PIMCO may determine that an investment opportunity or particular purchases or sales are appropriate for one or more Clients, but not appropriate for other Clients, or are appropriate or suitable for, or available to, Clients but in different sizes, terms, or timing than is appropriate or suitable for other Clients. For example, some Clients have higher risk tolerances than other Clients, such as private funds, which, in turn, allows PIMCO to allocate a wider variety and/or greater percentage of certain types of investments (which may or may not outperform other types of investments) to such Clients. Further, the respective risk tolerances of different types of Clients may change over time as market conditions change. Those Clients receiving an increased allocation as a result of the effect of their respective risk tolerance may be Clients that pay higher investment management fees or that pay incentive fees. In addition, certain Client account categories focusing on certain types of investments or asset classes will be given priority in new issue distribution and allocation with respect to the investments or asset classes that are the focus of their investment mandate. PIMCO may also take into account the bases for an issuer’s allocation to PIMCO, for example, by giving priority allocations to Client accounts holding existing positions in the issuer’s debt if the issuer’s allocation to PIMCO is based on such holdings. PIMCO also may determine not to allocate to or purchase or sell for certain Clients all investments for which all Clients may be eligible. Legal, contractual, or regulatory issues and/or related expenses applicable to PIMCO or one or more Clients may result in certain Clients not receiving securities that may otherwise be appropriate for them or may result in PIMCO selling securities out of Client accounts even if it might otherwise be beneficial to continue to hold them. Additional factors that are taken into account in the distribution and allocation of investment opportunities to Client accounts include, without limitation: ability to utilize leverage and risk tolerance of the Client account; the amount of discretion and trade authority given to PIMCO by the Client; availability of other similar investment opportunities; the Client account’s investment horizon and objectives; hedging, cash and liquidity needs of the portfolio; minimum increments and lot sizes; and underlying benchmark factors. Given all of the foregoing factors, the amount, timing, structuring, or terms of an investment by a Client, including a Portfolio, may differ from, and performance may be lower than, investments and performance of other Clients, including those that may provide greater fees or other compensation (including performance-based fees or allocations) to PIMCO. PIMCO has also adopted additional procedures to complement the general trade allocation policy that are designed to address potential conflicts of interest due to the side-by-side management of the Portfolios and certain pooled investment vehicles, including investment opportunity allocation issues.

From time to time, PIMCO may take an investment position or action for one or more Clients that may be different from, or inconsistent with, an action or position taken for one or more other Clients having similar or differing investment objectives. These positions and actions may adversely impact, or in some instances may benefit, one or more affected Clients (including Clients that are PIMCO affiliates) in which PIMCO has an interest, or which pays PIMCO higher fees or a performance fee. For example, a Client may buy a security and another Client may establish a short position in that same security. The subsequent short sale may result in a decrease in the price of the security that the other Client holds. Similarly, transactions or investments by one or more Clients may have the effect of diluting or otherwise disadvantaging the values, prices or investment strategies of another Client.

When PIMCO implements for one Client a portfolio decision or strategy ahead of, or contemporaneously with, similar portfolio decisions or strategies of another Client, market impact, liquidity constraints or other factors could result in one or more Clients receiving less favorable trading results, the costs of implementing such portfolio decisions or strategies could be increased or such Clients could otherwise be disadvantaged. On the other hand, potential conflicts may also arise because portfolio decisions regarding a Client may benefit other Clients. For example, the sale of a long position or establishment of a short position for a Client may decrease the price of the same security sold short by (and therefore benefit) other Clients, and the purchase of a security or covering of a short position in a security for a Client may increase the price of the same security held by (and therefore benefit) other Clients.

Under certain circumstances, a Client may invest in a transaction in which one or more other Clients are expected to participate, or already have made or will seek to make, an investment. In addition, to the extent permitted by applicable law, a Client may also engage in investment transactions that may result in other Clients being relieved of obligations, or that may cause other Clients to divest certain investments (e.g., a Client may make a loan to, or directly or indirectly acquire securities or indebtedness of, a company that uses the proceeds to refinance or reorganize its capital structure,

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which could result in repayment of debt held by another Client). Such Clients (or groups of Clients) may have conflicting interests and objectives in connection with such investments, including with respect to views on the operations or activities of the issuer involved, the targeted returns from the investment and the timeframe for, and method of, exiting the investment. When making such investments, PIMCO may do so in a way that favors one Client over another Client, even if both Clients are investing in the same security at the same time. Certain Clients may invest on a “parallel” basis (i.e., proportionately in all transactions at substantially the same time and on substantially the same terms and conditions). In addition, other accounts may expect to invest in many of the same types of investments as another account. However, there may be investments in which one or more of such accounts does not invest (or invests on different terms or on a non-pro rata basis) due to factors such as legal, tax, regulatory, business, contractual or other similar considerations or due to the provisions of a Client’s governing documents. Decisions as to the allocation of investment opportunities among such Clients present numerous conflicts of interest, which may not be resolved in a manner that is favorable to a Client’s interests. To the extent an investment is not allocated pro rata among such entities, a Client could incur a disproportionate amount of income or loss related to such investment relative to such other Client.

In addition, Clients may invest alongside one another in the same underlying investments or otherwise pursuant to a substantially similar investment strategy as one or more other Clients. In such cases, certain Clients may have preferential liquidity and information rights relative to other Clients holding the same investments, with the result that such Clients will be able to withdraw/redeem their interests in underlying investments in priority to Clients who may have more limited access to information or more restrictive withdrawal/redemption rights. Clients with more limited information rights or more restrictive liquidity may therefore be adversely affected in the event of a downturn in the markets.

Further, potential conflicts may be inherent in PIMCO’s use of multiple strategies. For example, conflicts will arise in cases where different Clients invest in different parts of an issuer’s capital structure, including circumstances in which one or more Clients may own private securities or obligations of an issuer and other Clients may own or seek to acquire private securities of the same issuer. For example, a Client may acquire a loan, loan participation or a loan assignment of a particular borrower in which one or more other Clients have an equity investment, or may invest in senior debt obligations of an issuer for one Client and junior debt obligations or equity of the same issuer for another Client.

PIMCO may also, for example, direct a Client to invest in a tranche of a structured finance vehicle, such as a CLO or CDO, where PIMCO is also, at the same or different time, directing another Client to make investments in a different tranche of the same vehicle, which tranche’s interests may be adverse to other tranches. PIMCO may also cause a Client to purchase from, or sell assets to, an entity, such as a structured finance vehicle, in which other Clients may have an interest, potentially in a manner that will have an adverse effect on the other Clients. There may also be conflicts where, for example, a Client holds certain debt or equity securities of an issuer, and that same issuer has issued other debt, equity or other instruments that are owned by other Clients or by an entity, such as a structured finance vehicle, in which other Clients have an interest.

In each of the situations described above, PIMCO may take actions with respect to the assets held by one Client that are adverse to the other Clients, for example, by foreclosing on loans, by putting an issuer into default, or by exercising rights to purchase or sell to an issuer, causing an issuer to take actions adverse to certain classes of securities, or otherwise. In negotiating the terms and conditions of any such investments, or any subsequent amendments or waivers or taking any other actions, PIMCO may find that the interests of a Client and the interests of one or more other Clients could conflict. In these situations, decisions over items such as whether to make the investment or take an action, proxy voting, corporate reorganization, how to exit an investment, or bankruptcy or similar matters (including, for example, whether to trigger an event of default or the terms of any workout) may result in conflicts of interest. Similarly, if an issuer in which a Client and one or more other Clients directly or indirectly hold different classes of securities (or other assets, instruments or obligations issued by such issuer or underlying investments of such issuer) encounters financial problems, decisions over the terms of any workout will raise conflicts of interests (including, for example, conflicts over proposed waivers and amendments to debt covenants). For example, a debt holder may be better served by a liquidation of the issuer in which it may be paid in full, whereas an equity or junior bond holder might prefer a reorganization that holds the potential to create value for the equity holders. In some cases PIMCO may refrain from taking certain actions or making certain investments on behalf of Clients in order to avoid or mitigate certain conflicts of interest or to prevent adverse regulatory or other effects on PIMCO, or may sell investments for certain Clients (in each case potentially disadvantaging the Clients on whose behalf the actions are not taken, investments not made, or investments sold). In other cases, PIMCO may not refrain from taking actions or making investments on behalf of certain Clients that have

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the potential to disadvantage other Clients. In addition, PIMCO may take actions or refrain from taking actions in order to mitigate legal risks to PIMCO or its affiliates or its Clients even if disadvantageous to a Client’s account. Moreover, a Client may invest in a transaction in which one or more other Clients are expected to participate, or already have made or will seek to make, an investment.

Additionally, certain conflicts may exist with respect to portfolio managers who make investment decisions on behalf of several different types of Clients. Such portfolio managers may have an incentive to allocate trades, time or resources to certain Clients, including those Clients who pay higher investment management fees or that pay incentive fees or allocations, over other Clients. These conflicts may be heightened with respect to portfolio managers who are eligible to receive a performance allocation under certain circumstances as part of their compensation.

From time to time, PIMCO personnel may come into possession of MNPI which, if disclosed, might affect an investor’s decision to buy, sell or hold a security. Should a PIMCO employee come into possession of MNPI with respect to an issuer, he or she generally will be prohibited from communicating such information to, or using such information for the benefit of, Clients, which could limit the ability of Clients to buy, sell or hold certain investments, thereby limiting the investment opportunities or exit strategies available to Clients. In addition, holdings in the securities or other instruments of an issuer by PIMCO or its affiliates may affect the ability of a Client to make certain acquisitions of or enter into certain transactions with such issuer. PIMCO has no obligation or responsibility to disclose such information to, or use such information for the benefit of, any person (including Clients). Moreover, restrictions imposed by or through third-party automated trading platforms could affect a Client’s ability to transact through, or the quality of execution achieved through, such platforms.

PIMCO maintains one or more restricted lists of companies whose securities are subject to certain trading prohibitions due to PIMCO’s business activities. PIMCO may restrict trading in an issuer’s securities if the issuer is on a restricted list or if PIMCO has MNPI about that issuer. In some situations, PIMCO may restrict Clients from trading in a particular issuer’s securities in order to allow PIMCO to receive MNPI on behalf of other Clients. A Client may be unable to buy or sell certain securities until the restriction is lifted, which could disadvantage the Client. PIMCO may also be restricted from making (or divesting of) investments in respect of some Clients but not others. In some cases PIMCO may not initiate or recommend certain types of transactions, or may otherwise restrict or limit its advice relating to certain securities if a security is restricted due to MNPI or if PIMCO is seeking to limit receipt of MNPI.

PIMCO may conduct litigation or engage in other legal actions on behalf of one or more Clients. In such cases, Clients may be required to bear certain fees, costs, expenses and liabilities associated with the litigation. Other Clients that are or were investors in, or otherwise involved with, the subject investments may or may not (depending on the circumstances) be parties to such litigation actions, with the result that certain Clients may participate in litigation actions in which not all Clients with similar investments may participate, and such non-participating Clients may benefit from the results of such litigation actions without bearing or otherwise being subject to the associated fees, costs, expenses and liabilities. PIMCO, for example, typically does not pursue legal claims on behalf of its separate accounts. Furthermore, in certain situations, litigation or other legal actions pursued by PIMCO on behalf of a Client may be brought against or be otherwise adverse to a portfolio company or other investment held by a Client.

The foregoing is not a complete list of conflicts to which PIMCO or Clients may be subject. PIMCO seeks to review conflicts on a case-by-case basis as they arise. Any review will take into consideration the interests of the relevant Clients, the circumstances giving rise to the conflict, applicable PIMCO policies and procedures, and applicable laws. Clients (and investors in the Portfolios) should be aware that conflicts will not necessarily be resolved in favor of their interests and may in fact be resolved in a manner adverse to their interests. PIMCO will attempt to resolve such matters fairly, but even so, matters may be resolved in favor of other Clients which pay PIMCO higher fees or performance fees or in which PIMCO or its affiliates have a significant proprietary interest. Clients (and investors in the Portfolios) should also be aware that a Portfolio may experience losses associated with decisions or actions directly or indirectly attributable to PIMCO, and PIMCO may determine whether compensation to the Portfolio for such losses is appropriate in view of its standard of care. PIMCO will attempt to resolve such matters fairly subject to applicable PIMCO policies and procedures, and applicable laws, but even so, such matters may not be resolved in favor of Clients’ (and Portfolio investors’) interests and may in fact be resolved in a manner adverse to their interests. There can be no assurance that any actual or potential conflicts of interest will not result in a particular Client or group of Clients receiving less favorable investment terms in or returns from certain investments than if such conflicts of interest did not exist.

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Conflicts like those described above may also occur between Clients, on the one hand, and PIMCO or its affiliates, on the other. These conflicts will not always be resolved in favor of the Client. In addition, because PIMCO is affiliated with Allianz, a large multi-national financial institution, conflicts similar to those described above may occur between clients of PIMCO and PIMCO’s affiliates or accounts managed by those affiliates. Those affiliates (or their clients), which generally operate autonomously from PIMCO, may take actions that are adverse to PIMCO’s Clients. In many cases PIMCO will have limited or no ability to mitigate those actions or address those conflicts, which could adversely affect Client performance. In addition, certain regulatory or internal restrictions may prohibit PIMCO from using certain brokers or investing in certain companies (even if such companies are not affiliated with Allianz) because of the applicability of certain laws and regulations or internal Allianz policies applicable to PIMCO, Allianz SE or their affiliates. An account’s willingness to negotiate terms or take actions with respect to an investment may also be, directly or indirectly, constrained or otherwise impacted to the extent Allianz SE, PIMCO, and/or their affiliates, directors, partners, managers, members, officers or personnel are also invested therein or otherwise have a connection to the subject investment (e.g., serving as a trustee or board member thereof).

Certain service providers to the Portfolios are expected to be owned by or otherwise related to or affiliated with a Client, and in certain cases, such service providers are expected to be, or are owned by, employed by, or otherwise related to, PIMCO, Allianz SE, their affiliates and/or their respective employees, consultants and other personnel. PIMCO may, in its sole discretion, determine to provide, or engage or recommend an affiliate of PIMCO to provide certain services to the Funds, instead of engaging or recommending one or more third parties to provide such services. Subject to the governance requirements of a particular fund and applicable law, PIMCO or its affiliates, as applicable, will receive compensation in connection with the provision of such services. As a result, PIMCO faces a conflict of interest when selecting or recommending service providers for the Portfolios. Fees paid to an unaffiliated service provider will be determined in PIMCO’s commercially reasonable discretion, taking into account the relevant facts and circumstances, and consistent with PIMCO’s responsibilities. Although PIMCO has adopted various policies and procedures intended to mitigate or otherwise manage conflicts of interest with respect to affiliated service providers, there can be no guarantee that such policies and procedures (which may be modified or terminated at any time in PIMCO’s sole discretion) will be successful.

Performance Fees. A portfolio manager may advise certain accounts with respect to which the advisory fee is based entirely or partially on performance. Performance fee arrangements may create a conflict of interest for the portfolio manager in that the portfolio manager may have an incentive to allocate the investment opportunities that he or she believes might be the most profitable to such other accounts instead of allocating them to a Portfolio. PIMCO has adopted policies and procedures reasonably designed to allocate investment opportunities between the Portfolios and such other accounts on a fair and equitable basis over time.

PIMCO has implemented policies and procedures relating to, among other things, portfolio management and trading practices, personal investment transactions, insider trading, gifts and entertainment, and political contributions that seek to identify, manage and/or mitigate actual or potential conflicts of interest and resolve such conflicts appropriately if they occur. PIMCO seeks to resolve any actual or potential conflicts in each client’s best interest. For more information regarding PIMCO’s actual or potential conflicts of interest, please refer to Item 10 and Item 11 in PIMCO’s Form ADV, Part 2A, attached as Exhibit A2.

T. Rowe Price Associates, Inc. (“T. Rowe Price”). Portfolio managers at T. Rowe Price and its affiliates may manage multiple accounts. These accounts may include, among others, mutual funds, exchange-traded funds, separate accounts (assets managed on behalf of institutions such as pension funds, colleges and universities, and foundations), offshore funds and common trust funds. T. Rowe Price also provides non-discretionary advice to institutional investors in the form of delivery of model portfolios. Portfolio managers make investment decisions for each portfolio based on the investment objectives, policies, practices, and other relevant investment considerations that they believe are applicable to that portfolio. Consequently, portfolio managers may purchase (or sell) securities for one portfolio and not another portfolio.

T. Rowe Price and its affiliates have adopted brokerage and trade allocation policies and procedures that they believe are reasonably designed to address any potential conflicts associated with managing multiple accounts for multiple clients. The portfolio managers’ compensation is determined in the same manner with respect to all portfolios managed by the portfolio manager.

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T. Rowe Price funds may, from time to time, own shares of Morningstar, Inc. Morningstar is a provider of investment research to individual and institutional investors, and publishes ratings on funds, including the T. Rowe Price funds. T. Rowe Price acts as subadvisor to two mutual funds offered by Morningstar. T. Rowe Price and its affiliates pay Morningstar for a variety of products and services. Morningstar may provide investment consulting and investment management services to clients of T. Rowe Price or its affiliates. T. Rowe Price funds may generally not purchase shares of stock issued by T. Rowe Price Group, Inc. However, a T. Rowe Price Index Fund is permitted to make such purchases to the extent T. Rowe Price Group, Inc. is represented in the benchmark index the fund is designed to track.

Additional potential conflicts may be inherent in our use of multiple strategies. For example, conflicts will arise in cases where different clients invest in different parts of an issuer’s capital structure, including circumstances in which one or more clients may own securities or obligations of an issuer and other clients may own or seek to acquire securities of the same issuer. For example, a client may acquire a loan, loan participation or a loan assignment of a particular borrower in which one or more other clients have an equity investment or may invest in senior debt obligations of an issuer for one client and junior debt obligations or equity of the same issuer for another client. Similarly, if an issuer in which a client and one or more other clients directly or indirectly hold different classes of securities (or other assets, instruments or obligations issued by such issuer or underlying investments of such issuer) encounters financial problems, is involved in a merger or acquisition or a going private transaction, decisions over the terms of any workout or transaction will raise conflicts of interests. While it is appropriate for different clients to hold investments in different parts of the same issuer’s capital structure under normal circumstances, the interests of stockholders and debt holders may conflict, as the securities they hold will likely have different voting rights, dividend or repayment priorities or other features that could be in conflict with one another. Clients should be aware that conflicts will not necessarily be resolved in favor of their interests.

In some cases, T. Rowe Price or its affiliates may refrain from taking certain actions or making certain investments on behalf of clients in order to avoid or mitigate certain conflicts of interest or to prevent adverse regulatory actions or other implications for T. Rowe Price or its affiliates, or may sell investments for certain clients, in such case potentially disadvantaging the clients on whose behalf the actions are not taken, investments not made, or investments sold. In other cases, T. Rowe Price or its affiliates may take actions in order to mitigate legal risks to T. Rowe Price or its affiliates, even if disadvantageous to a client.

Conflicts such as those described above may also occur between clients on the one hand, and T. Rowe Price or its affiliates, on the other. These conflicts will not always be resolved in the favor of the client. In addition, conflicts may exist between different clients of T. Rowe Price or its affiliates. T. Rowe Price and one or more of its affiliates may operate autonomously from each other and may take actions that are adverse to other clients managed by an affiliate. In some cases, T. Rowe Price or its affiliates will have limited or no ability to mitigate those actions or address those conflicts, which could adversely affect T. Rowe Price or its affiliates’ clients. In addition, certain regulatory restrictions may prohibit clients of T. Rowe Price or its affiliates from investing in certain companies because of the applicability of certain laws and regulations to T. Rowe Price, its affiliates, or the T. Rowe Price funds. T. Rowe Price or its affiliates’ willingness to negotiate terms or take actions with respect to an investment for its clients may be directly or indirectly, constrained or impacted to the extent that an affiliate or the T. Rowe Price funds and/or their respective directors, partners, managers, members, officers or personnel are also invested therein or otherwise have a connection to the subject investments.

Investment personnel are mindful of potentially conflicting interests of our clients with investments in different parts of an issuer’s capital structure and take appropriate measures to ensure that the interests of all clients are fairly represented.

T. Rowe Price Investment Management, Inc. (“TRPIM”). Portfolio managers at TRPIM and its affiliates may manage multiple accounts. These accounts may include, among others, mutual funds, exchange-traded funds, separate accounts (assets managed on behalf of institutions such as pension funds, colleges and universities, and foundations), offshore funds and common trust funds. T. Rowe Price also provides non-discretionary advice to institutional investors in the form of delivery of model portfolios. Portfolio managers make investment decisions for each portfolio based on the investment objectives, policies, practices, and other relevant investment considerations that they believe are applicable to that portfolio. Consequently, portfolio managers may purchase (or sell) securities for one portfolio and not another portfolio. TRPIM and its affiliates have adopted brokerage and trade allocation policies and procedures that they believe

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are reasonably designed to address any potential conflicts associated with managing multiple accounts. The portfolio managers’ compensation is determined in the same manner with respect to all portfolios managed by the portfolio manager.

TRPIM funds may, from time to time, own shares of Morningstar, Inc. Morningstar is a provider of investment research to individual and institutional investors, and publishes ratings on funds, including the TRPIM funds. TRPIM and its affiliates pay Morningstar for a variety of products and services. In addition, Morningstar may provide investment consulting and investment management services to clients of TRPIM or its affiliates. The T. Rowe Price funds may generally not purchase shares of stock issued by T. Rowe Price Group, Inc. However, a T. Rowe Price Index Fund is permitted to make such purchases to the extent T. Rowe Price Group, Inc. is represented in the benchmark index the fund is designed to track.

Additional potential conflicts may be inherent in our use of multiple strategies. For example, conflicts will arise in cases where different clients invest in different parts of an issuer’s capital structure, including circumstances in which one or more clients may own private securities or obligations of an issuer and other clients may own or seek to acquire securities of the same issuer. For example, a client may acquire a loan, loan participation or a loan assignment of a particular borrower in which one or more other clients have an equity investment or may invest in senior debt obligations of an issuer for one client and junior debt obligations or equity of the same issuer for another client. Similarly, if an issuer in which a client and one or more other clients directly or indirectly hold different classes of securities (or other assets, instruments or obligations issued by such issuer or underlying investments of such issuer) encounters financial problems, is involved in a merger or acquisition or a going private transaction, decisions over the terms of any workout or transaction will raise conflicts of interests. While it is appropriate for different clients to hold investments in different parts of the same issuer’s capital structure under normal circumstances, the interests of stockholders and debt holders may conflict, as the securities they hold will likely have different voting rights, dividend or repayment priorities or other features that could be in conflict with one another. Clients should be aware that conflicts will not necessarily be resolved in favor of their interests.

Wellington Management Company LLP (“Wellington Management”). Individual investment professionals at Wellington Management manage multiple accounts for multiple clients. These accounts may include mutual funds, separate accounts (assets managed on behalf of institutions, such as pension funds, insurance companies, foundations, or separately managed account programs sponsored by financial intermediaries), bank common trust accounts, and hedge funds. Each Fund’s managers listed in the prospectus who are primarily responsible for the day-to-day management of the Fund (“Portfolio Managers”) generally manage accounts in several different investment styles. These accounts may have investment objectives, strategies, time horizons, tax considerations and risk profiles that differ

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from those of the Fund. The Portfolio Managers make investment decisions for each account, including the relevant Fund, based on the investment objectives, policies, practices, benchmarks, cash flows, tax and other relevant investment considerations applicable to that account. Consequently, the Portfolio Manager may purchase or sell securities, including IPOs, for one account and not another account, and the performance of securities purchased for one account may vary from the performance of securities purchased for other accounts. Alternatively, these accounts may be managed in a similar fashion to the relevant Fund and thus the accounts may have similar, and in some cases nearly identical, objectives, strategies and/or holdings to that of the relevant Fund.

The Portfolio Manager or other investment professionals at Wellington Management may place transactions on behalf of other accounts that are directly or indirectly contrary to investment decisions made on behalf of the relevant Fund, or make investment decisions that are similar to those made for the relevant Fund, both of which have the potential to adversely impact the relevant Fund depending on market conditions. For example, an investment professional may purchase a security in one account while appropriately selling that same security in another account. Similarly, the Portfolio Manager may purchase the same security for the relevant Fund and one or more other accounts at or about the same time. In those instances the other accounts will have access to their respective holdings prior to the public disclosure of the relevant Fund’s holdings. In addition, some of these accounts have fee structures, including performance fees, which are or have the potential to be higher, in some cases significantly higher, than the fees Wellington Management receives for managing the Funds. Messrs. Siegle, White, and Ms. Pryshlak also manage accounts which pay performance allocations to Wellington Management or its affiliates. Because incentive payments paid by Wellington Management to the Portfolio Manager are tied to revenues earned by Wellington Management and, where noted, to the performance achieved by the manager in each account, the incentives associated with any given account may be significantly higher or lower than those associated with other accounts managed by a given Portfolio Manager. Finally, the Portfolio Managers may hold shares or investments in the other pooled investment vehicles and/or other accounts identified above.

Wellington Management’s goal is to meet its fiduciary obligation to treat all clients fairly and provide high quality investment services to all of its clients. Wellington Management has adopted and implemented policies and procedures, including brokerage and trade allocation policies and procedures, which it believes address the conflicts associated with managing multiple accounts for multiple clients. In addition, Wellington Management monitors a variety of areas, including compliance with primary account guidelines, the allocation of IPOs, and compliance with the firm’s Code of Ethics, and places additional investment restrictions on investment professionals who manage hedge funds and certain other accounts. Furthermore, senior investment and business personnel at Wellington Management periodically review the performance of Wellington Management’s investment professionals. Although Wellington Management does not track the time an investment professional spends on a single account, Wellington Management does periodically assess whether an investment professional has adequate time and resources to effectively manage the investment professional’s various client mandates.

Portfolio Manager Securities Ownership

All of the outstanding shares of each Portfolio are owned either directly or indirectly by Northwestern Mutual. Northwestern Mutual holds these shares for or through its Separate Accounts and, at times, may hold shares for or through its General Account. Because the Portfolios serve as underlying investment vehicles for Northwestern Mutual’s variable annuity and life contracts, interests in the Portfolios may only be acquired through ownership of one or more of those products. As of December 31, 2023, the portfolio managers of the Fund did not own any Northwestern Mutual variable annuity or variable life contracts with investments in the Portfolio(s) they manage. As of December 31, 2023, neither Ms. Johnston nor Mr. Carroll owned own any Northwestern Mutual variable annuities or variable life contracts with investments in the Index 400 Stock Portfolio or Index 600 Stock Portfolio. As of August 31, 2024, Felise L. Agranoff and Daniel Bloomgarden do not own any Northwestern Mutual variable annuities or variable life contracts with investments in the Mid Cap Growth Stock Portfolio. As of September 30, 2024, Mr. Bartolini did not own any Northwestern Mutual variable annuities or variable life contracts with investments in the Inflation Managed Portfolio.

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APPENDIX E - Legal Proceedings

[Reserved]

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APPENDIX F – Proxy Voting Policies and Procedures

MASON STREET ADVISORS, LLC

PROXY VOTING POLICIES AND PROCEDURES

Applicability: MSA	Effective Date: February 11, 2025
Regulatory Authority: Rule 206(4)-6 – Investment Advisers Act of 1940, as amended	Owner: Proxy Committee Chair
Compliance Contact: EC-INVCOMPLIANCE@northwesternmutual.com

It is the policy of Mason Street Advisors, LLC (“MSA”) to monitor corporate events and to cast proxy votes in a manner consistent with the best interests of its advisory clients and in so doing not to subrogate any particular client’s interests to its own. These Proxy Voting Policies and Procedures will be used by MSA for portfolios it manages directly (each, a “Direct-Advised Portfolio”), and the portfolios managed by third-party investment advisers (each, a “Sub-Advised Portfolio”) to:

(i)

Vote proxies on behalf of those Direct-Advised Portfolios for which MSA has day-to-day portfolio management responsibilities.

(ii)

Fulfill its oversight responsibilities with respect to the proxy voting of the sub-advisers appointed to provide day-to-day investment management services for the Sub-Advised Portfolios.

The procedures outlined below (the “Procedures”) are designed to enable MSA to fulfill its proxy voting and related oversight responsibilities. MSA has also established a Proxy Voting and Corporate Action Committee (the “Committee”) to assist MSA in fulfilling its proxy voting and related oversight responsibilities.

Proxy Voting and Corporate Action Committee

The Committee is responsible for developing and maintaining MSA’s Proxy Voting Policies and Procedures and overseeing their implementation. The Committee shall periodically review, and may amend or otherwise modify, these Proxy Voting Policies and Procedures as provided in the Committee’s Charter. The Committee is also responsible for overseeing MSA’s proxy voting and corporate action election practices with respect to the Direct-Advised Portfolios, and the proxy voting activities and corporate action election processes of sub-advisers with respect to the Sub-Advised Portfolios; and reviewing such other matters in relation to proxy voting and corporate action activities provided by MSA and any sub-adviser, as MSA or the Committee deems appropriate.

Proxy Voting Guidelines

MSA obtains analyses and recommendations as to how to vote on proxy issues from Institutional Shareholder Services Inc. (“ISS”), a third-party proxy voting research service. MSA utilizes ISS’ U.S. Proxy Voting Guidelines (the “Voting Guidelines”) to vote proxies on behalf of those Direct-Advised Portfolios for which MSA has day-to-day portfolio management responsibilities.

MSA will generally vote proxies consistent with the Voting Guidelines. However, the Voting Guidelines do not provide an exhaustive list of all potential voting issues that may arise with respect to any holding. In circumstances where the Voting Guidelines do not offer guidance, decisions on proxy voting will be made in accordance with the Procedures. In addition, while the Voting Guidelines are to be followed as a general policy, MSA portfolio managers may determine that a vote contrary to the Voting Guidelines is in the best interests of the Direct-Advised Portfolios after considering all relevant facts and circumstances. Such contrary votes shall be made in accordance with these Procedures.

MSA currently expects that its proxy voting decisions for the Direct-Advised Portfolios will be primarily limited to holdings in other mutual funds and exchange-traded funds (“ETFs”) because the Direct-Advised Portfolios operate primarily as affiliated fund of funds by investing in one or more of the Sub-Advised Portfolios, and because MSA

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employs mirror voting for the Direct-Advised Portfolios when casting proxy votes on proposals related to the Sub-Advised Portfolios. As a result, MSA expects that it will generally vote proxies for the Direct-Advised Portfolios utilizing the Voting Guidelines applicable to proxy proposals common to mutual funds and ETFs.

The Committee periodically reviews those portions of the Voting Guidelines that apply to the types of proxies voted by MSA. This review typically occurs annually after ISS’ publication of updated Voting Guidelines in connection with ISS’ annual policy review and update process.

Proxy Voting Procedures

Administration & Oversight

Direct-Advised Portfolios. The Committee is responsible for administering the proxy voting process for the Direct-Advised Portfolios. MSA has engaged ISS to assist in the voting of proxies, including access to its proxy exchange, notification of upcoming and pending proxy solicitations, research and voting recommendations, executing voting instructions with custodians, and maintaining records (including proxy statements and voting instructions) which must be provided promptly to MSA upon request.

The Direct-Advised Portfolios’ holdings are sent to ISS daily. ISS identifies any shareholder meeting notices that are available for the holdings and reviews the related proxy materials against the Voting

Guidelines. Following this review, ISS generates a voting recommendation on each proposal in accordance with its application of the Guidelines, which MSA considers in making its independent proxy voting decision. To assist MSA in its voting decision, ISS makes available the proxy statement for a particular solicitation and a comprehensive research report on the proxy proposal and the associated voting items which sets forth its analysis and conclusions along with its voting recommendation. ISS provides reports to MSA that summarize all upcoming proxy votes.

Sub-Advised Portfolios. For Sub-Advised portfolios, proxies may be voted by and in accordance with the proxy voting policies and procedures of the applicable Sub-Adviser, as approved by the respective board of directors of MSA’s registered investment company clients. The Committee oversees the proxy processes of Sub-Advisers by periodically reviewing the proxy policies and procedures of the Sub-Advisers, and any amendments, to (i) assess whether they are reasonably designed to provide that proxy voting will be in the best interests of the funds for which MSA acts as investment advisor, (ii) assess the Sub-Adviser’s use of proxy advisory firms (if any) and the Sub-Adviser’s process for adequately overseeing such firms, and (iii) assess the Sub-Adviser’s process for identifying and resolving potential conflicts of interest in the proxy voting process. The Committee will also consider periodic reports provided by Northwestern Mutual’s Managed Investments and Fund Compliance Department (“Compliance”) in connection with periodic compliance reports provided by Sub-Advisers. The Committee may consider such other information that the Committee determines appropriate to fulfill its oversight responsibilities with respect to Sub-Advisers. Periodic on-site, video conference and/or written inquiry due diligence reviews may be conducted as deemed appropriate by the Committee.

Voting Determinations

Votes in Accordance with Voting Guideline-Based Recommendations. MSA’s portfolio managers are responsible for determining the voting decisions on securities held in the Direct-Advised Portfolios. Generally, portfolio managers will vote proxies in accordance with ISS’s recommendations. As such, ISS is instructed to vote all proxy proposals in accordance with its recommendations unless MSA provides notification that it intends to vote contrary.

Votes Contrary to Voting Guideline-Based Recommendations. MSA’s portfolio managers shall review proxy proposals relating to investments made by the Direct-Advised Portfolios to identify circumstances where they believe the best interest of one or more of the Direct-Advised Portfolios may warrant a vote contrary to ISS’s recommendation. If an MSA portfolio manager determines to vote contrary to ISS’s recommendation, then the portfolio manager shall notify ISS of the contrary vote. A summary of votes made contrary to the Voting Guidelines shall be reviewed by the Committee at its next regularly scheduled meeting. MSA’s portfolio managers will report to the Committee regarding the rationale supporting contrary votes.

Voting in Absence of ISS Recommendation. In instances where no recommendation is provided by ISS and/or the subject of the proxy vote is not addressed in the Voting Guidelines, MSA’s portfolio managers shall determine the proxy vote in

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a manner consistent with these Procedures, giving appropriate consideration to all relevant facts and circumstances, and the best interests of the Direct-Advised Portfolios.

Voting for Multiple Accounts. It may be possible that the same security is held by multiple Direct-Advised Portfolios. If proxy votes are cast differently between the Direct-Advised Portfolios, the rationale shall be reported to the Committee at its next regularly scheduled meeting.

Conflicts of Interest

Identification of Conflicts of Interest. From time to time, MSA or its portfolio managers may have a conflict of interest in making proxy voting determinations for the Direct-Advised Portfolios. Examples of potential conflicts of interest include:

➢

Business Relationships. A potential conflict may arise in connection with a proxy voting proposal relating to a company (or its affiliated persons) with whom MSA, or an affiliate, has a material business relationship. In such case, the failure to vote in a manner favorable to the company could harm MSA’s relationship with the company. For example, a potential conflict may occur in an instance involving a proxy proposal relating to a director of MSA or Northwestern Mutual1, who also serves as a director of a public company or a member of the company’s management.

➢

Personal or Familial Relationships. A potential conflict may arise in connection with a proxy voting proposal relating to a company (or its affiliated persons) with whom MSA, an officer, director or employee of MSA, or an affiliate of MSA may have a personal or familial relationship. For example, a potential conflict may occur in an instance involving a proxy proposal relating to a spouse, relative or friend who serves as a director of a public company or a member of the company’s management.

In order to assist with managing such conflicts, Compliance shall prepare and maintain a Potential Conflicts Watch List (the “List”), with the assistance of Northwestern Mutual’s Law Department (“Law”) and MSA, which shall seek on a best-efforts basis to include the names of public issuers that have been identified and determined to potentially pose a conflict of interest with respect to MSA’s proxy voting activities. With respect to Personal or Familial Relationships, MSA personnel have an ongoing responsibility to report and update, as necessary, their personal and familial relationships that may pose a conflict of interest. The List shall be periodically reviewed and updated by Compliance (with the assistance of Law and MSA), as necessary.

Resolving Conflicts of Interest. The MSA portfolio manager(s) or investment personnel of MSA involved in making proxy determinations for the Direct-Advised Portfolios have primary responsibility for identifying potential conflicts of interest that may be presented in connection with the review of a particular proxy proposal, and shall provide full, fair and timely disclosure of such conflicts to the Chief Compliance Officer of MSA (the “CCO”) and obtain his/her informed consent before submitting a voting instruction on such proxy proposal. For purposes of identifying conflicts of interest under these procedures, MSA investment personnel will rely upon the objective facts available to them about an issuer and its voting matters from reliable sources. The appearance of the issuer (or its affiliate) on the List shall be deemed to create a potential conflict of interest requiring disclosure to the CCO.

If a potential conflict of interest is identified and reported to the CCO, the following Procedures shall be followed on a case-by-case basis as determined to be most appropriate in light of the totality of the circumstances:

○

If the potential conflict of interest involves a Personal or Familial Relationship of the MSA portfolio manager charged with voting the proxy proposal, then the portfolio manager shall recuse himself/herself from the voting decision and the adviser CCO shall direct the proxy be voted by a different MSA portfolio manager (or other investment personnel) for whom no conflict of interest exists.

○

If the potential conflict involves a Business Relationship, then the following Procedures shall generally be followed:

•

If the portfolio manager’s vote recommendation is consistent with the recommendation of ISS, then the CCO may determine that the conflict is adequately addressed by following the recommendation of ISS, which is developed through application of the VotingGuidelines which are pre-determined.

1 Northwestern Mutual is MSA’s parent company.

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•

If the portfolio manager’s vote recommendation is inconsistent with the recommendation of ISS (or if the proposal is not covered by the Voting Guidelines and/or no ISS recommendation is available), then the CCO may take such other steps deemed necessary to reasonably address the conflict, including but not limited to (i) directing the Committee to determine the vote, (ii) following the recommendation of ISS (if any), (iii) disclosing the existence and nature of the conflict to the respective board of directors of the Direct-Advised Portfolios that own the shares and seek direction on how to vote the proxies, or (iv) engaging another third party fiduciary to assist in determining the vote (e.g., the Law Department and/or outside counsel).

•

If the CCO determines to address a material conflict of interest by directing the Committee to review and determine the vote, then the Committee shall consider (i) the portfolio manager’s written recommendation and rationale, and any other contact that the portfolio manager has had with persons outside of MSA regarding voting on the proxy proposal (as reported by the portfolio manager), (ii) ISS’s written recommendation and supporting materials (if any), (iii) the applicable proxy statement and other issuer solicitation materials, and (iv) any other relevant information provided by the portfolio manager. If the respective board of directors of the Direct-Advised Portfolios that own the shares or other third-party fiduciary is engaged to assist in determining the vote, then such party(ies) shall be provided with the foregoing materials.

•

If the Committee is engaged to determine the vote, then the Committee shall consider the foregoing materials and all other relevant facts and circumstances to determine the vote. The Committee shall document its voting rationale and retain such documentation together with the supporting materials considered with the books and records of the Committee.

Mirror & Pass-Through Voting. MSA will employ “mirror voting” or “pass-through voting” when casting proxies for the Direct-Advised Portfolios in the following circumstances:

To avoid a potential conflict of interest when casting proxy votes for the Direct-Advised Portfolios with respect to shares held by the Direct-Advised Portfolios of one or more of affiliated Sub-Advised Portfolios (i.e., part of the “same group of investment companies” under Rule 12d1-4) (an “underlying portfolio”), MSA will employ mirror voting. Mirror voting means that MSA will vote the shares of the underlying portfolio in the same proportion as the voting instructions received by the underlying portfolio from its other shareholders.

With respect to the Direct-Advised Portfolios’ investment in mutual funds and ETFs that are not underlying portfolios, MSA will employ mirror voting or pass-through voting, as required, in accordance with any voting restrictions applicable to the respective Direct-Advised Portfolio2.

Decisions to Not Vote

MSA will attempt to process every proxy vote it receives. However, there are situations in which MSA may not vote proxies if the costs, resources or resulting restrictions required to vote such proxies outweigh the expected benefit to the Direct-Advised Portfolio of casting such a vote.

From time to time, securities to which voting rights attach on record date may be sold after record date but prior to the time votes are required to be cast. In these circumstances, it is MSA’s policy to vote such proxies.

Although MSA and ISS seek to obtain all proxy materials on a timely basis, there may also be instances where MSA may not be given enough time to process a proxy vote. For example, MSA, through no fault of its own, may receive a meeting notice too late or may be unable to obtain a timely translation. In these circumstances, MSA may fail to vote the applicable proxies.

2 For example, see Section III.E. of the Northwestern Mutual Series Fund, Inc.’s Rule 12d1-4 Policies and Procedures.

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Time Phase Voting

In connection with voting proxies for certain securities, MSA may be entitled to employ time phase voting, a corporate law concept that allows longer-term shareholders to vote more than their current shares of record. It is MSA’s policy to employ time phase voting for those securities where, in accordance with MSA’s normal record retention schedule, records necessary to determine a client’s historical security positions are available.

Oversight of Proxy Advisory Firms

With respect to proxy advisory firms engaged by MSA, the Committee will oversee the proxy services provided by such firms. When determining whether to engage or continue to engage a proxy advisory firm, the Committee reviews the policies and considerations applied by the proxy advisory firm in voting proxies. The Committee shall periodically conduct due diligence of any proxy advisory firm that provides services to MSA to assess, among other things: (i) the nature, extent and services provided by the firm; (ii) the capacity and competency to provide such services; (iii) the proxy advisory firm’s policies and procedures for addressing conflicts of interest with respect to its proxy voting recommendations; and (iv) the extent to which the occurrence of factual errors, incompleteness with respect to data or reporting information, or methodological weakness in the proxy advisory firm’s analysis (that the Committee becomes aware of and deems credible and relevant to its voting determinations) materially affected the proxy advisory firm’s research or recommendations that MSA utilized in discharging its proxy voting responsibilities. MSA will request that the proxy advisory firm update MSA on an ongoing basis regarding any business changes relevant to the proxy advisory firm’s competence to provide voting services (including but not limited to the formulation of recommendations), any conflicts of interest that may arise with respect to the firm’s recommendations, and any material operational or compliance issues.

Miscellaneous

•

1. Reconciliation and Oversight

In accordance with its general oversight responsibilities, MSA will periodically reconcile the number of shares voted to actual shares held on record date.

•

2. Recordkeeping

MSA shall retain or cause ISS to retain proxy statements received regarding the Direct-Advised Portfolios, records of votes cast on behalf of the Direct-Advised Portfolios, records of Fund-level requests for proxy voting information, records relating to reconciliations performed and all documents prepared by MSA regarding votes cast in contradiction of the Voting Guidelines. In addition, any document prepared by MSA that is material to a proxy voting decision such as these Procedures or the Voting Guidelines, Committee materials and other internal research relating to voting decisions will be retained. Proxy statements received from issuers are either available on the SEC’s EDGAR database or are kept by ISS and are available to clients on request. All proxy voting materials and supporting documentation are retained for a minimum of five years from the end of the fiscal year during which the last entry was made.

•

3. Disclosure Policy

MSA will generally not disclose its voting intentions to any party other than to the respective boards of directors of its registered investment company clients, ISS, custodians and similar service providers.

Except to the extent required by applicable law or otherwise approved by the CCO, MSA will not disclose to third parties including, but not limited to, proxy solicitors, non-clients, and the media, MSA’s actual proxy votes (until voting results are made public) or MSA’s voting intentions (except electronically to regulatory agencies). However, from time to time, MSA may discuss matters related to an upcoming proxy vote with the issuer of the securities subject to the vote or its agent(s). In such cases, MSA may disclose its voting intentions when it determines that such disclosure is appropriate and in the best interest of the applicable Direct-Advised Portfolio.

•

4. Fixed Income and Non-Voting Securities

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To the extent applicable, these Procedures will also be used by MSA for exercising voting rights which may arise in limited circumstances upon conversion of, or in connection with certain other situations with respect to, fixed income or other securities which do not ordinarily carry voting rights (for example, units comprised of equity and debt that are issued by certain foreign REITs). As is the case with equity securities, MSA’s portfolio managers are responsible for voting decisions on fixed income or other non-equity securities held in the Direct-Advised Portfolios they manage. However, because no recommendations are generated by ISS, in the limited circumstances described above, MSA portfolio managers shall determine the proxy vote in a manner consistent with these Procedures, giving appropriate consideration to all relevant facts and circumstances, and the best interests of the applicable Direct-Advised Portfolio. A summary of such votes will be reviewed by the Committee at its next regularly scheduled meeting. In the event the portfolio manager or other MSA officer, director or employee identifies a conflict of interest relating to a particular proposal, the Procedures in Section C, above, shall be followed.

•

5. Corporate Actions

The procedural requirements contained in these Proxy Voting Policies and Procedures shall not apply in the case of ordinary course requests for amendments, consent solicitations or directions with respect to the exercise of remedies for equity, fixed income or other traditionally non-voting securities (so called “corporate actions”). However, it is the policy of MSA to process corporate actions in a manner consistent with the best interests of the applicable client and in so doing not to subrogate the client’s interests to its own. Northwestern Mutual’s Treasury, Risk, Investment Operations, Analytics and Data (TRIAD) personnel (as service providers to MSA) are responsible for processing corporate actions, as well as for coordinating with the clients’ custodians to ensure that all voting materials received by the custodians relating to the clients’ portfolios from issuers, trustees or other third parties are processed in a timely fashion and delivered to the applicable portfolio managers, and for maintaining voting records.

* * * * * * *

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abrdn U.S. Registered Advisers (the “abrdn Advisers”)

Proxy Voting Guidelines

Effective as of September 2024

Rule 206(4)-6 under the Investment Advisers Act of 1940, as amended (the “Advisers Act”) requires the abrdn Advisers to vote proxies in a manner consistent with clients’ best interest and must not place its interests above those of its clients when doing so. It requires the abrdn Advisers to: (i) adopt and implement written policies and procedures that are reasonably designed to ensure that the abrdn Advisers vote proxies in the best interest of the clients, and (ii) to disclose to the clients how they may obtain information on how the abrdn Advisers voted proxies. In addition, Rule 204-2 requires the abrdn Advisers to keep records of proxy voting and client requests for information. As of August 31, of each year, investment managers that are required to file reports under Section 13(f) are required to report their proxy voting records on Form N-PX for the twelve-month period ended June 30, with respect to certain shareholder advisory votes on executive compensation (those required by Section 14A of the Exchange Act).As registered investment advisers, the abrdn Advisers have an obligation to vote proxies with respect to securities held in its client portfolios in the best interests of the clients for which it has proxy voting authority.

As registered investment advisers, the abrdn Advisers have an obligation to vote proxies with respect to securities held in its client portfolios in the best interests of the clients for which it has proxy voting authority.

The abrdn Advisers are committed to exercising responsible ownership with a conviction that companies adopting best practices in corporate governance will be more successful in their core activities and deliver enhanced returns to shareholders.

The abrdn Advisers have adopted a proxy voting policy. The proxy voting policy is designed and implemented in a way that is reasonably expected to ensure that proxies are voted in the best interests of clients.

Resolutions are analysed by a member of our regional investment teams or our Active Ownership Team and votes instructed following consideration of our policies, our views of the company and our investment insights. To enhance our analysis, we will often engage with a company prior to voting to understand additional context and explanations, particularly where there is a deviation from what we believe to be best practice. However, voting decisions for exchange traded funds are made strictly in accordance with ISS’s proxy voting guidelines which are reviewed and approved on an annual basis.

Where contentious issues arise in relation to motions put before a shareholders’ meeting, abrdn Advisers will usually contact the management of the company to exchange views and give management the opportunity to articulate its position. The long-term nature of the relationships that we develop with investee company boards should enable us to deal with any concerns that we may have over strategy, the management of risk or governance practices directly with the chairman or senior independent director. In circumstances where this approach is unsuccessful, abrdn Advisers are prepared to escalate their intervention by expressing their concerns through the company’s advisers, through interaction with other shareholders or attending and speaking at General Meetings.

In managing third party money on behalf of clients, there are a limited number of situations where potential conflicts of interest could arise in the context of proxy voting. One case is where funds are invested in companies that are either clients or related parties of clients. Another case is where one fund managed by abrdn invests in other funds managed by abrdn.

For cases involving potential conflicts of interest, abrdn Advisers have implemented procedures to ensure the appropriate handling of proxy voting decisions. The guiding principle of abrdn Advisers’ conflicts of interest policy is simple – to exercise our right to vote in the best interests of the clients on whose behalf we are managing funds.

We employ ISS as a service provider to facilitate electronic voting. We require ISS to provide recommendations based on our own set of parameters tailored to abrdn’s assessment and approach, but remain conscious always that all voting decisions are our own on behalf of our clients. We consider ISS’s recommendations and those based on our custom parameters as input to our voting decisions. We make use of the ISS standard research and recommendations and those based on our own custom policy as input to our voting decisions. Where our analysts make a voting decision that is different from the recommendations based on our custom policy they will provide a rationale for such decisions which will be made publicly available in our voting disclosures.

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In order to make proxy voting decisions, an abrdn analyst will assess the resolutions at general meetings in our active investment portfolios. This analysis will be based on our knowledge of the company but will also make use of the custom and standard recommendations provided by ISS as described above. The product of this analysis will be final voting decision instructed through ISS applied to all funds for which abrdn have been appointed to vote. For funds managed by a sub-adviser, we may delegate to the sub-adviser the authority to vote proxies; however, the sub-adviser will be required to either follow our policies and procedures or to demonstrate that their policies and procedures are consistent with ours, or otherwise implemented in the best interest of clients.

There may be certain circumstances where abrdn may take a more limited role in voting proxies. We will not vote proxies for client accounts in which the client contract specifies that abrdn will not vote. We may abstain from voting a client proxy if the voting is uneconomic or otherwise not in clients’ best interests. For companies held only in passively managed portfolios the abrdn custom recommendations provided by ISS will be used to automatically apply our voting approach; we have scope to intervene to test that this delivers appropriate results and will on occasions intrude to apply a vote more fully in clients’ best interests. If voting securities are part of a securities lending program, we may be unable to vote while the securities are on loan. However, we have the ability to recall shares on loan or to restrict lending when required, in order to ensure all shares have voted. In addition, certain jurisdictions may impose share-blocking restrictions at various times which may prevent abrdn from exercising our voting authority.

We recognize that there may be situations in which we vote at a company meeting where we encounter a conflict of interest. Such situations include:

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where a portfolio manager owns the holding in a personal account

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An investee company that is also a segregated client

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An investee company where an executive director or officer of our company is also a director of that company

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An investee company where an employee of abrdn is a director of that company

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A significant distributor of our products

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Any other companies which may be relevant from time to time

We have adopted procedures within our proxy voting process to identify where a conflict exists. These procedures are designed to ensure that our voting decisions are based on our client’s best interests and are not impacted by any conflict.

The implementation of this policy, along with the conflicts of interest, will be reviewed periodically by the Active Ownership team. abrdn’s ESG Principles & Voting Policies is published on our website.

To the extent that an abrdn Adviser may rely on sub-advisers, whether affiliated or unaffiliated, to manage any client portfolio on a discretionary basis, the abrdn Adviser may delegate responsibility for voting proxies to the sub-adviser. However, such sub-advisers will be required either to follow these Policies and Procedures or to demonstrate that their proxy voting policies and procedures are consistent with these Policies and Procedures or otherwise implemented in the best interests of the abrdn Advisers’ clients. Clients that have not granted abrdn voting authority over securities held in their accounts will receive their proxies in accordance with the arrangements they have made with their service providers.

As disclosed in Part 2A of each abrdn Adviser’s Form ADV, a client may obtain information on how its proxies were voted by requesting such information from its abrdn Adviser. Unless specifically requested by a client in writing, and other than as required for the Funds, the abrdn Advisers do not generally disclose client-specific proxy votes to third parties.

Our proxy voting records are available per request and on the SEC’s website at SEC.gov.

On occasions when it is deemed to be a fiduciary for an ERISA client’s assets, abrdn will vote the Plan assets in accordance with abrdn’s Proxy Voting Policy and in line with DOL guidance.

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AMERICAN CENTURY INVESTMENTS

PROXY VOTING POLICIES

American Century Investment Management, Inc. (the “Adviser”) is the investment manager for a variety of advisory clients, including the American Century family of funds. In such capacity, the Adviser has been delegated the authority to vote proxies with respect to investments held in the accounts it manages. The following is a statement of the proxy voting policies that have been adopted by the Adviser. In the exercise of proxy voting authority which has been delegated to it by particular clients, the Adviser will apply the following policies in accordance with, and subject to, any specific policies that have been adopted by the client and communicated to and accepted by the Adviser in writing.

General Principles

In providing the service of voting client proxies, the Adviser is guided by general fiduciary principles, must act prudently, solely in the interest of its clients, and must not subordinate client interests to unrelated objectives. Except as otherwise indicated in these Policies, the Adviser will vote all proxies with respect to investments held in the client accounts it manages. The Adviser will attempt to consider all factors of its vote that could affect the value of the investment. Although in most instances the Adviser will vote proxies consistently across all client accounts, the votes will be based on the best interests of each client. As a result, accounts managed by the Adviser may at times vote differently on the same proposals. Examples of when an account’s vote might differ from other accounts managed by the Adviser include, but are not limited to, proxy contests and proposed mergers. In short, the Adviser will vote proxies in the manner that it believes will do the most to maximize shareholder value.

Specific Proxy Matters

Routine Matters

Election of Directors

(1)

Generally. The Adviser will generally support the election of directors that result in a board made up of a majority of independent directors. In general, the Adviser will vote in favor of management's director nominees if they are running unopposed. The Adviser believes that management is in the best possible position to evaluate the qualifications of directors and the needs and dynamics of a particular board. The Adviser of course maintains the ability to vote against any candidate whom it feels is not qualified or if there are specific concerns about the individual, such as allegations of criminal wrongdoing or breach of fiduciary responsibilities. Additional information the Adviser may consider concerning director nominees include, but is not limited to, whether (i) there is an adequate explanation for repeated absences at board meetings, (ii) the nominee receives non-board fee compensation, or (iii) there is a family relationship between the nominee and the company’s chief executive officer or controlling shareholder, and/or (iv) the nominee has sufficient time and commitment to serve effectively in light of the nominee’s services on other public company boards. When management's nominees are opposed in a proxy contest, the Adviser will evaluate which nominees' publicly-announced management policies and goals are most likely to maximize shareholder value, as well as the past performance of the incumbents.

(2)

Committee Service. The Adviser will withhold votes for non-independent directors who serve on the audit, and/or compensation committees of the board.

(3)

Classification of Boards. The Adviser will support proposals that seek to declassify boards. Conversely, the Adviser will oppose efforts to adopt classified board structures.

(4)

Majority Independent Board. The Adviser will support proposals calling for a majority of independent directors on a board. The Adviser believes that a majority of independent directors can help to facilitate objective decision making and enhances accountability to shareholders.

(5)

Majority Vote Standard for Director Elections. The Adviser will vote in favor of proposals calling for directors to be elected by an affirmative majority of the votes cast in a board election, provided that the proposal allows for a plurality voting standard in the case of contested elections. The Adviser may consider voting against such shareholder proposals where a company’s board has adopted an alternative

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measure, such as a director resignation policy, that provides a meaningful alternative to the majority voting standard and appropriately addresses situations where an incumbent director fails to receive the support of the majority of the votes cast in an uncontested election.

(6)

Withholding Campaigns. The Adviser will support proposals calling for shareholders to withhold votes for directors where such actions will advance the principles set forth in paragraphs (1) through (5) above.

Ratification of Selection of Auditors

The Adviser will generally rely on the judgment of the issuer’s audit committee in selecting the independent auditors who will provide the best service to the company. The Adviser believes that independence of the auditors is paramount and will vote against auditors whose independence appears to be impaired. The Adviser will vote against proposed auditors in those circumstances where (1) an auditor has a financial interest in or association with the company, and is therefore not independent; (2) non-audit fees comprise more than 50% of the total fees paid by the company to the audit firm; or (3) there is reason to believe that the independent auditor has previously rendered an opinion to the issuer that is either inaccurate or not indicative of the company's financial position.

Compensation Matters

Executive Compensation

(1)

Advisory Vote on Compensation. The Adviser believes there are more effective ways to convey concerns about compensation than through an advisory vote on compensation (such as voting against specific excessive incentive plans or withholding votes from compensation committee members). The Adviser will consider and vote on a case-by-case basis on say-on-pay proposals and will generally support management proposals unless there are inadequate risk-mitigation features or other specific concerns exist, including if the Adviser concludes that executive compensation is (i) misaligned with shareholder interests, (ii) unreasonable in amount, or (iii) not in the aggregate meaningfully tied to the company’s performance.

(2)

Frequency of Advisory Votes on Compensation. The Adviser generally supports the triennial option for the frequency of say-on-pay proposals, but will consider management recommendations for an alternative approach.

Equity Based Compensation Plans

The Adviser believes that equity-based incentive plans are economically significant issues upon which shareholders are entitled to vote. The Adviser recognizes that equity-based compensation plans can be useful in attracting and maintaining desirable employees. The cost associated with such plans must be measured if plans are to be used appropriately to maximize shareholder value. The Adviser will conduct a case-by-case analysis of each stock option, stock bonus or similar plan or amendment, and generally approve management's recommendations with respect to adoption of or amendments to a company's equity-based compensation plans, provided that the total number of shares reserved under all of a company's plans is reasonable and not excessively dilutive.

The Adviser will review equity-based compensation plans or amendments thereto on a case-by-case basis. Factors that will be considered in the determination include the company's overall capitalization, the performance of the company relative to its peers, and the maturity of the company and its industry; for example, technology companies often use options broadly throughout its employee base which may justify somewhat greater dilution.

Amendments which are proposed in order to bring a company's plan within applicable legal requirements will be reviewed by the Adviser's legal counsel; amendments to executive bonus plans to comply with IRS Section 162(m) disclosure requirements, for example, are generally approved.

The Adviser will generally vote against the adoption of plans or plan amendments that:

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Provide for immediate vesting of all stock options in the event of a change of control of the company without reasonable safeguards against abuse (see “Anti-Takeover Proposals” below);

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Reset outstanding stock options at a lower strike price unless accompanied by a corresponding and proportionate reduction in the number of shares designated. The Adviser will generally oppose adoption of stock option plans that explicitly or historically permit repricing of stock options, regardless of the number of shares reserved for issuance, since their effect is impossible to evaluate;

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Establish restriction periods shorter than three years for restricted stock grants;

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Do not reasonably associate awards to performance of the company; or

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Are excessively dilutive to the company.

Anti-Takeover Proposals

In general, the Adviser will vote against any proposal, whether made by management or shareholders, which the Adviser believes would materially discourage a potential acquisition or takeover. In most cases an acquisition or takeover of a particular company will increase share value. The adoption of anti-takeover measures may prevent or frustrate a bid from being made, may prevent consummation of the acquisition, and may have a negative effect on share price when no acquisition proposal is pending. The items below discuss specific anti-takeover proposals.

Cumulative Voting

The Adviser will vote in favor of any proposal to adopt cumulative voting and will vote against any proposal to eliminate cumulative voting that is already in place, except in cases where a company has a staggered board. Cumulative voting gives minority shareholders a stronger voice in the company and a greater chance for representation on the board. The Adviser believes that the elimination of cumulative voting constitutes an anti-takeover measure.

Staggered Board

If a company has a “staggered board,” its directors are elected for terms of more than one year and only a segment of the board stands for election in any year. Therefore, a potential acquiror cannot replace the entire board in one year even if it controls a majority of the votes. Although staggered boards may provide some degree of continuity and stability of leadership and direction to the board of directors, the Adviser believes that staggered boards are primarily an anti-takeover device and will vote against establishing them and for eliminating them. However, the Adviser does not necessarily vote against the re-election of directors serving on staggered boards.

“Blank Check” Preferred Stock

Blank check preferred stock gives the board of directors the ability to issue preferred stock, without further shareholder approval, with such rights, preferences, privileges and restrictions as may be set by the board. In response to a hostile takeover attempt, the board could issue such stock to a friendly party or “white knight” or could establish conversion or other rights in the preferred stock which would dilute the common stock and make an acquisition impossible or less attractive. The argument in favor of blank check preferred stock is that it gives the board flexibility in pursuing financing, acquisitions or other proper corporate purposes without incurring the time or expense of a shareholder vote. Generally, the Adviser will vote against blank check preferred stock. However, the Adviser may vote in favor of blank check preferred if the proxy statement discloses that such stock is limited to use for a specific, proper corporate objective as a financing instrument.

Elimination of Preemptive Rights

When a company grants preemptive rights, existing shareholders are given an opportunity to maintain their proportional ownership when new shares are issued. A proposal to eliminate preemptive rights is a request from management to revoke that right.

While preemptive rights will protect the shareholder from having its equity diluted, it may also decrease a company's ability to raise capital through stock offerings or use stock for acquisitions or other proper corporate purposes. Preemptive rights may therefore result in a lower market value for the company's stock. In the long term, shareholders could be adversely affected by preemptive rights. The Adviser generally votes against proposals to grant preemptive rights, and for proposals to eliminate preemptive rights.

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Non-targeted Share Repurchase

A non-targeted share repurchase is generally used by company management to prevent the value of stock held by existing shareholders from deteriorating. A non-targeted share repurchase may reflect management's belief in the favorable business prospects of the company. The Adviser finds no disadvantageous effects of a non-targeted share repurchase and will generally vote for the approval of a non-targeted share repurchase subject to analysis of the company’s financial condition.

Increase in Authorized Common Stock

The issuance of new common stock can also be viewed as an anti-takeover measure, although its effect on shareholder value would appear to be less significant than the adoption of blank check preferred. The Adviser will evaluate the amount of the proposed increase and the purpose or purposes for which the increase is sought. If the increase is not excessive and is sought for proper corporate purposes, the increase will be approved. Proper corporate purposes might include, for example, the creation of additional stock to accommodate a stock split or stock dividend, additional stock required for a proposed acquisition, or additional stock required to be reserved upon exercise of employee stock option plans or employee stock purchase plans. Generally, the Adviser will vote in favor of an increase in authorized common stock of up to 100%; increases in excess of 100% are evaluated on a case-by-case basis, and will be voted affirmatively if management has provided sound justification for the increase.

“Supermajority” Voting Provisions or Super Voting Share Classes

A “supermajority” voting provision is a provision placed in a company's charter documents which would require a "supermajority" (ranging from 66 to 90%) of shareholders and shareholder votes to approve any type of acquisition of the company. A super voting share class grants one class of shareholders a greater per-share vote than those of shareholders of other voting classes. The Adviser believes that these are standard anti-takeover measures and will generally vote against them. The supermajority provision makes an acquisition more time- consuming and expensive for the acquiror. A super voting share class favors one group of shareholders disproportionately to economic interest. Both are often proposed in conjunction with other anti-takeover measures.

“Fair Price” Amendments

This is another type of charter amendment that would require an offeror to pay a “fair” and uniform price to all shareholders in an acquisition. In general, fair price amendments are designed to protect shareholders from coercive, two-tier tender offers in which some shareholders may be merged out on disadvantageous terms. Fair price amendments also have an anti-takeover impact, although their adoption is generally believed to have less of a negative effect on stock price than other anti-takeover measures. The Adviser will carefully examine all fair price proposals. In general, the Adviser will vote against fair price proposals unless the Adviser concludes that it is likely that the share price will not be negatively affected and the proposal will not have the effect of discouraging acquisition proposals.

Limiting the Right to Call Special Shareholder Meetings.

The corporation statutes of many states allow minority shareholders at a certain threshold level of ownership (frequently 10%) to call a special meeting of shareholders. This right can be eliminated (or the threshold increased) by amendment to the company's charter documents. The Adviser believes that the right to call a special shareholder meeting is significant for minority shareholders; the elimination of such right will be viewed as an anti-takeover measure and the Adviser will generally vote against proposals attempting to eliminate this right and for proposals attempting to restore it.

Poison Pills or Shareholder Rights Plans

Many companies have now adopted some version of a poison pill plan (also known as a shareholder rights plan). Poison pill plans generally provide for the issuance of additional equity securities or rights to purchase equity securities upon the occurrence of certain hostile events, such as the acquisition of a large block of stock.

The basic argument against poison pills is that they depress share value, discourage offers for the company and serve to “entrench” management. The basic argument in favor of poison pills is that they give management more time and leverage to deal with a takeover bid and, as a result, shareholders may receive a better price. The Adviser believes that the potential benefits of a poison pill plan are outweighed by the potential detriments. The Adviser will generally vote against all forms of poison pills.

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The Adviser will, however, consider on a case-by-case basis poison pills that are very limited in time and preclusive effect. The Adviser will generally vote in favor of such a poison pill if it is linked to a business strategy that will – in our view – likely result in greater value for shareholders, if the term is less than three years, and if shareholder approval is required to reinstate the expired plan or adopt a new plan at the end of this term.

Golden Parachutes

Golden parachute arrangements provide substantial compensation to executives who are terminated as a result of a takeover or change in control of their company. The existence of such plans in reasonable amounts probably has only a slight anti-takeover effect. In voting, the Adviser will evaluate the specifics of the plan presented.

Reincorporation

Reincorporation in a new state is often proposed as one part of a package of anti-takeover measures. Several states (such as Pennsylvania, Ohio and Indiana) now provide some type of legislation that greatly discourages takeovers. Management believes that Delaware in particular is beneficial as a corporate domicile because of the well-developed body of statutes and case law dealing with corporate acquisitions.

The Adviser will examine reincorporation proposals on a case-by-case basis. Generally, if the Adviser believes that the reincorporation will result in greater protection from takeovers, the reincorporation proposal will be opposed. The Adviser will also oppose reincorporation proposals involving jurisdictions that specify that directors can recognize non-shareholder interests over those of shareholders. When reincorporation is proposed for a legitimate business purpose and without the negative effects identified above, the Adviser will generally vote affirmatively.

Confidential Voting

Companies that have not previously adopted a “confidential voting” policy allow management to view the results of shareholder votes. This gives management the opportunity to contact those shareholders voting against management in an effort to change their votes.

Proponents of secret ballots argue that confidential voting enables shareholders to vote on all issues on the basis of merit without pressure from management to influence their decision. Opponents argue that confidential voting is more expensive and unnecessary; also, holding shares in a nominee name maintains shareholders' confidentiality. The Adviser believes that the only way to insure anonymity of votes is through confidential voting, and that the benefits of confidential voting outweigh the incremental additional cost of administering a confidential voting system. Therefore, the Adviser will generally vote in favor of any proposal to adopt confidential voting.

Opting In or Out of State Takeover Laws

State takeover laws typically are designed to make it more difficult to acquire a corporation organized in that state. The Adviser believes that the decision of whether or not to accept or reject offers of merger or acquisition should be made by the shareholders, without unreasonably restrictive state laws that may impose ownership thresholds or waiting periods on potential acquirors. Therefore, the Adviser will generally vote in favor of opting out of restrictive state takeover laws.

Transaction Related Proposals

The Adviser will review transaction related proposals, such as mergers, acquisitions, and corporate reorganizations, on a case-by-case basis, taking into consideration the impact of the transaction on each client account. In some instances, such as the approval of a proposed merger, a transaction may have a differential impact on client accounts depending on the securities held in each account. For example, whether a merger is in the best interest of a client account may be influenced by whether an account holds, and in what proportion, the stock of both the acquirer and the acquiror. In these circumstances, the Adviser may determine that it is in the best interests of the accounts to vote the accounts’ shares differently on proposals related to the same transaction.

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Other Matters

Proposals Involving Environmental, Social, and Governance (“ESG”) Matters

The Adviser believes that certain ESG issues can potentially impact an issuer’s long-term financial performance and has developed an analytical framework, as well as a proprietary assessment tool, to integrate risks and opportunities stemming from ESG issues into our investment process. This ESG integration process extends to our proxy voting practices in that our Sustainable Research Team analyzes on a case-by-case basis the financial materiality and potential risks or economic impact of the ESG issues underpinning proxy proposals and makes voting recommendations based thereon for the Adviser’s consideration. The Sustainable Research Team evaluates ESG-related proposals based on a rational linkage between the proposal, its potential economic impact, and its potential to maximize long-term shareholder value.

Where the economic effect of such proposals is unclear and there is not a specific written client-mandate, the Adviser believes it is generally impossible to know how to vote in a manner that would accurately reflect the views of the Adviser’s clients, and, therefore, the Adviser will generally rely on management’s assessment of the economic effect if the Adviser believes the assessment is not unreasonable.

Shareholders may also introduce proposals which are the subject of existing law or regulation. Examples of such proposals would include a proposal to require disclosure of a company's contributions to political action committees or a proposal to require a company to adopt a non-smoking workplace policy. The Adviser believes that such proposals may be better addressed outside the corporate arena and, absent a potential economic impact, will generally vote with management’s recommendation. In addition, the Adviser will generally vote against any proposal which would require a company to adopt practices or procedures which go beyond the requirements of existing, directly applicable law.

Anti-Greenmail Proposals

“Anti-greenmail” proposals generally limit the right of a corporation, without a shareholder vote, to pay a premium or buy out a 5% or greater shareholder. Management often argues that they should not be restricted from negotiating a deal to buy out a significant shareholder at a premium if they believe it is in the best interest of the company. Institutional shareholders generally believe that all shareholders should be able to vote on such a significant use of corporate assets. The Adviser believes that any repurchase by the company at a premium price of a large block of stock should be subject to a shareholder vote. Accordingly, it will generally vote in favor of anti-greenmail proposals.

Indemnification

The Adviser will generally vote in favor of a corporation's proposal to indemnify its officers and directors in accordance with applicable state law. Indemnification arrangements are often necessary in order to attract and retain qualified directors. The adoption of such proposals appears to have little effect on share value.

Non-Stock Incentive Plans

Management may propose a variety of cash-based incentive or bonus plans to stimulate employee performance. In general, the cash or other corporate assets required for most incentive plans is not material, and the Adviser will vote in favor of such proposals, particularly when the proposal is recommended in order to comply with IRC Section 162(m) regarding salary disclosure requirements. Case-by-case determinations will be made of the appropriateness of the amount of shareholder value transferred by proposed plans.

Director Tenure

These proposals ask that age and term restrictions be placed on the board of directors. The Adviser believes that these types of blanket restrictions are not necessarily in the best interests of shareholders and therefore will vote against such proposals, unless they have been recommended by management.

Directors’ Stock Options Plans

The Adviser believes that stock options are an appropriate form of compensation for directors, and the Adviser will generally vote for director stock option plans which are reasonable and do not result in excessive shareholder dilution. Analysis of such proposals will be made on a case-by-case basis, and will take into account total board compensation and the company’s total exposure to stock option plan dilution.

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Director Share Ownership

The Adviser will generally vote against shareholder proposals which would require directors to hold a minimum number of the company's shares to serve on the Board of Directors, in the belief that such ownership should be at the discretion of Board members.

Non-U.S. Proxies

The Adviser will generally evaluate non-U.S. proxies in the context of the voting policies expressed herein but will also, where feasible, take into consideration differing laws, regulations, and practices in the relevant foreign market in determining if and how to vote. There may also be circumstances when practicalities and costs involved with non-U.S. investing make it disadvantageous to vote shares. For instance, the Adviser generally does not vote proxies in circumstances where share blocking restrictions apply, when meeting attendance is required in person, or when current share ownership disclosure is required.

Use of Proxy Advisory Services

The Adviser may retain proxy advisory firms to provide services in connection with voting proxies, including, without limitation, to provide information on shareholder meeting dates and proxy materials, translate proxy materials printed in a foreign language, provide research on proxy proposals and voting recommendations in accordance with the voting policies expressed herein, provide systems to assist with casting the proxy votes, and provide reports and assist with preparation of filings concerning the proxies voted.

Prior to the selection of a proxy advisory firm and periodically thereafter, the Adviser will consider whether the proxy advisory firm has the capacity and competency to adequately analyze proxy issues and the ability to make recommendations based on material accurate information in an impartial manner. Such considerations may include some or all of the following (i) periodic sampling of votes cast through the firm’s systems to determine that votes are in accordance with the Adviser’s policies and its clients best interests, (ii) onsite visits to the proxy advisory firm’s office and/or discussions with the firm to determine whether the firm continues to have the resources (e.g. staffing, personnel, technology, etc.) capacity and competency to carry out its obligations to the Adviser, (iii) a review of the firm’s policies and procedures, with a focus on those relating to identifying and addressing conflicts of interest and monitoring that current and accurate information is used in creating recommendations, (iv) requesting that the firm notify the Adviser if there is a change in the firm’s material policies and procedures, particularly with respect to conflicts, or material business practices (e.g., entering or exiting new lines of business), and reviewing any such change, and (v) in case of an error made by the firm, discussing the error with the firm and determining whether appropriate corrective and preventative action is being taken. In the event the Adviser discovers an error in the research or voting recommendations provided by the firm, it will take reasonable steps to investigate the error and seek to determine whether the firm is taking reasonable steps to reduce similar errors in the future.

While the Adviser takes into account information from many different sources, including independent proxy advisory services, the decision on how to vote proxies will be made in accordance with these policies.

Monitoring Potential Conflicts of Interest

Corporate management has a strong interest in the outcome of proposals submitted to shareholders. As a consequence, management often seeks to influence large shareholders to vote with their recommendations on particularly controversial matters. In the vast majority of cases, these communications with large shareholders amount to little more than advocacy for management’s positions and give the Adviser’s staff the opportunity to ask additional questions about the matter being presented. Companies with which the Adviser has direct business relationships could theoretically use these relationships to attempt to unduly influence the manner in which the Adviser votes on matters for its clients. To ensure that such a conflict of interest does not affect proxy votes cast for the Adviser’s clients, our proxy voting personnel regularly catalog companies with whom the Adviser has significant business relationships; all discretionary (including case-by-case) voting for these companies will be voted by the client or an appropriate fiduciary responsible for the client (e.g., a committee of the independent directors of a fund or the trustee of a retirement plan).

In addition, to avoid any potential conflict of interest that may arise when one American Century fund owns shares of another American Century fund, the Adviser will “echo vote” such shares, if possible. Echo voting means the Adviser will vote the shares in the same proportion as the vote of all the other holders of the fund’s shares. So, for example, if shareholders of a fund cast 80% of their votes in favor of a proposal and 20% against the proposal, any American

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Century fund that owns shares of such fund will cast 80% of its shares in favor of the proposal and 20% against. When this is not possible (as in the case where the other American Century funds are the only shareholders), the shares of the underlying fund will be voted in the same proportion as the vote of the shareholders of the corresponding American Century policy portfolio for proposals common to both funds. In the case where the policy portfolio does not have a common proposal, shares will be voted in consultation with a committee of the independent directors.

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The voting policies expressed above are of course subject to modification in certain circumstances and will be reexamined from time to time. With respect to matters that do not fit in the categories stated above, the Adviser will exercise its best judgment as a fiduciary to vote in the manner which will most enhance shareholder value.

Case-by-case determinations will be made by the Adviser’s staff, which is overseen by the General Counsel of the Adviser, in consultation with equity managers. Electronic records will be kept of all votes made.

Allspring Global Investments

PROXY VOTING POLICIES AND PROCEDURES

EFFECTIVE AS OF JUNE 2024

Allspring Global Investments (Allspring) Stewardship

As fiduciaries, we are committed to effective stewardship of the assets we manage on behalf of our clients. To us, good stewardship reflects responsible, active ownership and includes both engaging with investee companies and voting proxies in a manner that we believe will maximize the long-term value of our investments.

Scope of Policies and Procedures

In conjunction with the Allspring Engagement Policy, these Proxy Voting Policies and Procedures (“Policies and Procedures”) set out how Allspring complies with applicable regulatory requirements in respect of how we exercise voting rights when we invest in shares traded on a regulated market on behalf of a client. Not all clients delegate proxy voting authority to Allspring. Allspring will not vote proxies, or provide advice to clients on how to vote proxies in the absence of specific delegation of authority, a pre-existing contractual agreement, or an obligation under applicable law (e.g., securities that are held in an investment advisory account for which Allspring exercises no investment discretion are not voted by Allspring).

With respect to the legal entities covered by the Policies and Procedures, client accounts and investment products (i.e., Trusts and series (funds) thereof, UCITS, alternative investment funds, private funds, and medium-term note programmes) of the following are included:

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Allspring Global Investments, LLC

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Allspring Funds Management, LLC

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Allspring Global Investments (UK) Limited

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Allspring Global Investments Luxembourg S.A

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Allspring Global Investments (Singapore) Pte. Ltd

Voting Philosophy

Allspring has adopted these Policies and Procedures to ensure that proxies are voted in the best interests of clients and Investment Product investors, without regard to any relationship that any affiliated person of Allspring or the Investment Product (or an affiliated person of such affiliated person) may have with the issuer. Allspring exercises its voting responsibility as a fiduciary with the goal of maximizing value to clients consistent with governing laws and the investment policies of each client. While securities are not purchased to exercise control or to seek to effect corporate change through share ownership activism, Allspring supports sound corporate governance practices at companies in which client assets are invested. Allspring has established an appropriate strategy determining when and how the voting rights related to the instruments held in portfolios managed are exercised, so that these rights are exclusively reserved to the relevant Investment Product and its investors.

Proxy Administration

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Allspring’s Stewardship Team (“Stewardship”) administers the proxy voting process. The Stewardship Team is part of the Allspring Sustainability Team. Stewardship is responsible for administering and overseeing the proxy voting process to ensure the implementation of the Policies and Procedures, including regular operational reviews, typically conducted on a weekly basis. Stewardship monitors third party voting of proxies to ensure it is being done in a timely and responsible manner, including review of scheduled vendor reports. Stewardship, in conjunction with the Allspring Proxy Governance Committee, reviews the continuing appropriateness of the Policies and Procedures set forth herein, and recommends revisions as necessary.

Third Party Proxy Voting Vendor

Allspring has retained a third-party proxy voting service, Institutional Shareholder Services Inc. (“ISS”), to assist in the implementation of certain proxy voting-related functions including: 1) Providing research on proxy matters, 2) Providing technology to facilitate the sharing of research and discussions related to proxy votes, 3) Vote proxies in accordance with Allspring’s guidelines, 4) Handle administrative and reporting items, and 5) Maintain records of proxy statements received in connection with proxy votes and provide copies/analyses upon request. Except in instances where clients have retained voting authority, Allspring retains the responsibility for proxy voting decisions.

Proxy Committee

Allspring Proxy Governance Committee

The Allspring Proxy Governance Committee shall be responsible for overseeing the proxy voting process to ensure its implementation in conformance with these Policies and Procedures. The Allspring Proxy Governance Committee shall coordinate with Allspring Compliance to monitor ISS, the proxy voting agent currently retained by Allspring, to determine that ISS is accurately applying the Policies and Procedures as set forth herein and operates as an independent proxy voting agent. Allspring’s ISS Vendor Oversight process includes an assessment of ISS’ Policy and Procedures (“P&P”), including conflict controls and monitoring, receipt of and review of routine performance-related reporting by ISS to Allspring and periodic onsite due diligence meetings. Due diligence meetings typically include meetings with key staff, P&P related presentations and discussions, technology-related demonstrations and assessments, and some sample testing, if appropriate. The Allspring Proxy Governance Committee shall review the continuing appropriateness of the Policies and Procedures set forth herein. The Allspring Proxy Governance Committee may delegate certain powers and responsibilities to proxy voting working groups. The Allspring Proxy Governance Committee reviews and, in accordance with these Policies and Procedures, votes on issues that have been escalated from proxy voting working groups. Members of the Allspring Proxy Governance Committee also oversee the implementation of Allspring Proxy Governance Committee recommendations for the respective functional areas in Allspring that they represent.

Proxy Voting Due Diligence Working Group

Among other delegated matters, the proxy voting Due Diligence Working Group (‘DDWG’), in accordance with these Policies and Procedures, reviews and votes on routine proxy proposals that it considers under these Policies and Procedures in a timely manner. If necessary, the DDWG escalates issues to the Allspring Proxy Governance Committee that are determined to be material by the DDWG or otherwise in accordance with these Policies and Procedures. The DDWG coordinates with Allspring’s Compliance teams to review the performance and independence of ISS in exercising its proxy voting responsibilities.

Meetings; Committee Actions

The Allspring Proxy Governance Committee shall convene or act through written consent, including through the use of electronic systems of record, of a majority of Allspring Proxy Governance Committee members as needed and when discretionary voting determinations need to be considered. Any working group of the Allspring Proxy Governance Committee shall have the authority on matters delegated to it to act by vote or written consent, including through the use of electronic systems of record, of a majority of the working group members available at that time. The Allspring Proxy Governance Committee shall also meet quarterly to review the Policies and Procedures.

Membership

Members are selected based on subject matter expertise for the specific deliverables the committee is required to complete. The voting members of the Allspring Proxy Governance Committee are identified in the Allspring Proxy

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Charter. Changes to the membership of the Allspring Proxy Governance Committee will be made only with approval of the Allspring Proxy Governance Committee. Upon departure from Allspring Global Investments, a member’s position on the Allspring Proxy Governance Committee will automatically terminate.

Voting Procedures

Unless otherwise required by applicable law,1 proxies will be voted in accordance with the following steps and in the following order of consideration:

First, any voting items related to Allspring “Top-of-House” voting principles (as described below under the heading “Allspring Proxy Voting Principles/Guidelines”) will generally be voted in accordance with a custom voting policy with ISS (“Custom Policy”) designed to implement the Allspring’s Top-of-House voting principles.2

Second, any voting items for meetings deemed of “high importance”3 (e.g., proxy contests, mergers and acquisitions,) where ISS opposes management recommendations will be referred to the Portfolio Management teams for recommendation or the DDWG (or escalated to the Allspring Proxy Governance Committee) for case-by-case review and vote determination.

Third, with respect to any voting items where ISS Sustainability Voting Guidelines4 provide a different recommendation than ISS Standard Voting Guidelines, the following steps are taken:

Stewardship5 evaluates the matter for materiality and any other relevant considerations.

If Stewardship recommends further review, the voting item is then referred to the Portfolio Management teams for recommendation or the DDWG (or escalated to the Allspring Proxy Governance Committee) for case-by-case review and vote determination.

If Stewardship does not recommend further review, the matter is voted in accordance with ISS Standard Voting Guidelines.

Fourth, any remaining proposals are voted in accordance with ISS Standard Voting Guidelines.6

Commitment to the Principles of Responsible Investment

As a signatory to the Principles for Responsible Investment, Allspring has integrated certain environmental, social, and governance factors into its investment processes, which includes the proxy process. As described under Voting Procedures above, Allspring considers ISS’s Sustainability Voting Guidelines as a point of reference in certain cases deemed to be material to a company’s long-term shareholder value.

Voting Discretion

1 Where provisions of the Investment Company Act of 1940 (the “1940 Act”) specify the manner in which items for any third party registered investment companies (e.g., mutual funds, exchange-traded funds and closed-end funds) and business development companies (as defined in Section 2(a)(48) of the 1940 Act) (“Third Party Fund Holding Voting Matters”) held by the Trusts or series thereof, Allspring shall vote the Third Party Fund Holding Voting Matter on behalf of the Trusts or series thereof accordingly.

2 The Allspring Proxy Governance Committee may determine that additional review of a Top-of-House voting matter is warranted. For example, voting matters for declassified boards or annual election of directors of public operating and holding companies that have certain long-term business commitments (e.g., developing proprietary technology; or having an important strategic alliance in place) may warrant referral to the DDWG (or escalation to the Proxy Governance Committee) for case-by-case review and vote determination.

3 The term “high importance” is defined as those items designated Proxy Level 6 or 5 by ISS, which include proxy contests, mergers, and other reorganizations.

4 ISS’s Sustainability Voting Guidelines seeks to promote support for recognized global governing bodies encouraging sustainable business practices advocating for stewardship of environment, fair labor practices, nondiscrimination, and the protection of human rights.

5 The Allspring Stewardship Team is part of the Sustainability Team, led by Henrietta Pacquement who reports into the Allspring Chief Investment Officer(s).

6 The voting of proxies for Taft Hartley clients may incorporate the use of ISS’s Taft Hartley voting guidelines.

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In all cases, the Allspring Proxy Governance Committee (and any working group thereof) will exercise its voting discretion in accordance with the voting philosophy of these Policies and Procedures. In cases where a proxy item is forwarded by ISS to the Allspring Proxy Governance Committee or a working group thereof, the Allspring Proxy Governance Committee or its working group may be assisted in its voting decision through receipt of: (i) independent research and voting recommendations provided by ISS or other independent sources; (ii) input from the investment sub-adviser responsible for purchasing the security; and (iii) information provided by company management and shareholder groups.

Portfolio Manager and Sub-Adviser Input

The Allspring Proxy Governance Committee (and any working group thereof) may consult with portfolio management teams and Fund sub-advisers on specific proxy voting issues as it deems appropriate. In addition, portfolio management teams or Fund sub-advisers may proactively make recommendations to the Allspring Proxy Governance Committee regarding any proxy voting issue. In this regard, the process takes into consideration expressed views of portfolio management teams and Fund sub-advisers given their deep knowledge of investee companies. For any proxy vote, portfolio management teams and Investment Product advisers and sub-advisers may make a case to vote against the ISS or Allspring Proxy Governance Committee’s recommendation (which is described under Voting Procedures above). Any portfolio management team’s or Investment Product adviser’s or sub-adviser’s opinion should be documented in a brief write-up for consideration by the DDWG who will determine, or escalate to the Allspring Proxy Governance Committee, the final voting decision.

Consistent Voting

The Allspring Proxy Policies and Procedures is consistently applied on the same matter when securities of an issuer are held by multiple client accounts unless there are 1) special circumstances such as, for example, proposals concerning corporate actions such as mergers, tender offers, and acquisitions or as reasonably necessary to implement specified proxy voting guidelines as established by a client (e.g. Taft Hartley ISS Guidelines or custom proxy guidelines) or 2) the expressed views of different portfolio management teams and Fund sub-advisers is different on particular proposals. In the latter case, the Proxy Governance Committee will work with the investment teams to gauge whether alignment can be achieved.

Governance and Oversight

Allspring Top-of-House Proxy Voting Principles/Guidelines

The following reflects Allspring’s Top-of-House Voting Principles in effect as of the date of these Policies and Procedures. Allspring has put in place a custom voting policy with ISS to implement these voting principles.

We believe that Boards of Directors of investee companies should have strong, independent leadership and should adopt structures and practices that enhance their effectiveness. We recognize that the optimal board size and governance structure can vary by company size, industry, region of operations, and circumstances specific to the company.

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We generally vote for the election of Directors in uncontested elections. We reserve the right to vote on a case-by-case basis when directors fail to meet their duties as a board member, such as failing to act in the best economic interest of shareholders; failing to maintain independent audit, compensation, nominating committees; and failing to attend at least 75% of meetings, etc.

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We generally vote for an independent board that has a majority of outside directors who are not affiliated with the top executives and have minimal or no business dealings with the company to avoid potential conflicts of interests.

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Generally speaking, we believe Directors serving on an excessive number of boards could result in time constraints and an inability to fulfill their duties.

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We generally support adopting a declassified board structure for public operating and holding companies. We reserve the right to vote on a case-by-case basis when companies have certain long-term business commitments.

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We generally support annual election of directors of public operating and holding companies. We reserve the right to vote on a case-by-case basis when companies have certain long-term business commitments.

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We believe a well-composed board should embody multiple dimensions of diversity in order to bring personal and professional experiences to bear and create a constructive debate of competing perspectives and opinions in the boardroom. Diversity should consider factors such as gender, ethnicity, and age as well as professional factors such as area of expertise, industry experience and geographic location.

We believe it is the responsibility of the Board of Directors to create, enhance, and protect shareholder value and that companies should strive to maximize shareholder rights and representation.

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We believe that companies should adopt a one-share, one-vote standard and avoid adopting share structures that create unequal voting rights among their shareholders. We will normally support proposals seeking to establish that shareholders are entitled to voting rights in proportion to their economic interests

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We believe that directors of public operating and holding companies be elected by a majority of the shares voted. We reserve the right to vote on a case-by-case basis when companies have certain long-term business commitments. This ensures that directors of public operating and holding companies who are not broadly supported by shareholders are not elected to serve as their representatives. We will normally support proposals seeking to introduce bylaws requiring a majority vote standard for director elections.

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We believe a simple majority voting standard should be required to pass proposals. We will normally support proposals seeking to introduce bylaws requiring a simple majority vote.

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We believe that shareholders who own a meaningful stake in the company and have owned such stake for a sufficient period of time should have, in the form of proxy access, the ability to nominate directors to appear on the management ballot at shareholder meetings. In general we support market-standardized proxy access proposals and we will analyze them based on various criteria such as threshold ownership levels, a minimum holding period, and the % and/or number of directors that are subject to nomination.

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We believe that shareholders should have the right to call a special meeting and not wait for company management to schedule a meeting if there is sufficiently high shareholder support for doing so on issues of substantial importance. In general we support the right to call a special meeting if there is balance between a reasonable threshold of shareholders and a hurdle high enough to also avoid the waste of corporate resources for narrowly supported interests. We will evaluate the issues of importance on the basis of serving all shareholders well and not structured for the benefit of a dominant shareholder over others.

Closed-End Funds

We recognize that many exchange-listed closed-end funds (“CEFs”) have adopted particular corporate governance practices that deviate from certain policies set forth in these Policies and Procedures. We believe that the distinctive structure of CEFs can provide important benefits to investors but leaves CEFs uniquely vulnerable to short-term oriented activist investors. Thus, to protect the interests of their shareholders, many CEFs have adopted measures to defend against attacks from activist investors. As such, in light of the unique nature of CEFs and their differences in corporate governance practices from operating companies, we will consider on a case-by-case basis proposals involving the adoption of defensive measures by CEFs. This is consistent with our approach to proxy voting that recognizes the importance of case-by-case analysis to ensure alignment with investment team views and voting in accordance with the best interests of shareholders.

Practical Limitations to Proxy Voting

While Allspring uses its reasonable best efforts to vote proxies, in certain circumstances, it may be impractical or impossible for Allspring to vote proxies (e.g., limited value or unjustifiable costs).

Securities on Loan

As a general matter, securities on loan will not be recalled to facilitate proxy voting (in which case the borrower of the security shall be entitled to vote the proxy). However, as it relates to portfolio holdings of the Investment Products, if the Allspring Proxy Governance Committee is aware of an item in time to recall the security and has determined in good faith that the importance of the matter to be voted upon outweighs the loss in lending revenue that would result from recalling the security (e.g., if there is a controversial upcoming merger or acquisition, or some other significant matter), the security will be recalled for voting.

Share Blocking

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Proxy voting in certain countries requires ‘share blocking’. Shareholders wishing to vote their proxies must deposit their shares with a designated depository before the date of the meeting. Consequently, the shares may not be sold in the period preceding the proxy vote. Absent compelling reasons, Allspring believes that the benefit derived from voting these shares is outweighed by the burden of limited trading. Therefore, if share blocking is required in certain markets, Allspring will not participate and will refrain from voting proxies for those clients impacted by share blocking.

Conflicts of Interest

We always seek to place the interests of our clients first and to identify and manage any conflicts of interest, including those that arise from proxy voting or engagement. Allspring acts as a fiduciary with respect to its asset management activities and therefore we must act in the best interest of our clients and address conflicts that arise.

Conflicts of interest are identified and managed through a strict and objective application of these Policies and Procedures. Allspring may have a conflict of interest regarding a proxy to be voted upon if, for example, Allspring or its affiliates have other relationships with the issuer of the proxy (e.g. the issuer may be a corporate pension fund client of Allspring). This type of conflict is generally mitigated by the information barriers between Allspring and its affiliates and our commitment as a fiduciary to independent judgement. However, when the Allspring Proxy Governance Committee becomes aware of a conflict of interest (that gets uncovered through the Allspring Proxy Voting Policies and Procedures), it takes additional steps to mitigate the conflict, by using any of the following methods:

Instructing ISS to vote in accordance with its recommendation;

Disclosing the conflict to the relevant Board and obtaining its consent before voting;

Submitting the matter to the relevant Board to exercise its authority to vote on such matter;

Engaging an independent fiduciary who will direct the vote on such matter,

Consulting with Legal and Compliance and, if necessary, outside legal counsel for guidance on resolving the conflict of interest,

Voting in proportion to other shareholders ("mirror voting") following consultation with the relevant Board of the Funds if the conflict pertains to a matter involving a portfolio holding of the Funds; or

Voting in other ways that are consistent with Allspring’s obligation to vote in the best interests of its clients.

Finally, Allspring is a privately-owned company and one of our owners is GTCR which owns other companies as well known as Affiliates. The Allspring Regulatory Compliance Team maintains the GTCR Affiliates list and publishes an updated list quarterly. Since the Affiliates may issue publicly traded stock and hold regular proxy meetings, Allspring manages this potential conflict of interest by defaulting all proxy voting in the affiliates to the ISS recommendations. Allspring has no influence attributed to the decisions or the voting elections.

Vendor Oversight

The Stewardship Team monitors the ISS proxy process against specific criteria in order to identify potential issues relating to account reconciliation, unknown and rejected ballot reviews, upcoming proxy reviews, share reconciliation oversight, etc. With respect to ISS’s management of its potential conflicts of interest with corporate issuers, ISS provides institutional clients such as Allspring with its “Policy and disclosure of Significant ISS Relationships” and tools to provide transparency of those relationships.

Other Provisions

Policy Review and Ad Hoc Meetings

The Allspring Proxy Governance Committee meets at least annually to review these Policies and Procedures and consider any appropriate changes. Meetings may be convened more frequently (for example, to discuss a specific proxy agenda or proposal) as requested by the Head of Stewardship, any member of the Allspring Proxy Governance Committee, or Chief Compliance Officer. The Allspring Proxy Governance Committee includes representation from Portfolio Management, Stewardship, Investment Analytics, Legal, and Compliance.

Records Retention

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The Stewardship Team will maintain the following records relating to the implementation of the Policies and Procedures:

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A copy of these Policies and Procedures;

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Proxy statements received for client securities (which will be satisfied by relying on ISS);

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Records of votes cast on behalf of Investment Products and separate account clients (which ISS maintains on behalf of Allspring);

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Records of each written client request for proxy voting records and Allspring’s written response to any client request (written or oral) for such records; and

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Any documents prepared by Allspring or ISS that were material to making a proxy voting decision.

Such proxy voting books and records shall be maintained at an office of Allspring in an easily accessible place for a period of six years.

Compliance with Regional Regulations and Client Delegation Arrangements

U.S. Regulation

These Policies and Procedures have been written in compliance with Rule 206(4)-6 of the Investment Advisers Act of 1940 as they relate to Allspring Global Investments, LLC and Allspring Funds Management, LLC. Proxy voting records with respect to certain shareholder advisory votes on executive compensation (or say-on-pay votes) will be disclosed on Form N-PX starting in 2023 by Allspring’s registered investment advisers, as required by Rule 14Ad-1 under the Securities Exchange Act of 1934. Proxy voting records for Allspring’s mutual funds are disclosed on Form N-PX annually, as required by Section 30 and Rule 30b1-4 of the Investment Company Act of 1940, to the Securities and Exchange Commission (“SEC”).

E.U. Regulation

These Policies and Procedures have been established, implemented and maintained, as they apply to Allspring Global Investments Luxembourg S.A. (“Allspring Luxembourg”) and Allspring Global Investments (UK) Limited, in accordance the EU Shareholder Rights Directive II (EU 2017/828) (SEF II) and the COBS 2.2B SRD requirements in the UK FCA Handbook. Specific to Allspring Luxembourg, the Policies and Procedures also comply with Article 23 of CSSF Regulation No. 10-4, and the CSSF Circular 18/698.

Disclosure of policies and procedures

A summary of these Policies and Procedures are disclosed on Allspring’s website.

In addition, Allspring will disclose to its separate clients (i.e. proxy votes for assets managed on behalf of Allspring’s other clients as per a delegation arrangement) a summary description of its proxy voting policy and procedures via mail.

Disclosure of proxy voting results

Allspring will provide to clients proxy statements and any records as to how Allspring voted proxies on behalf of clients quarterly or upon request. For assistance, clients may contact their relationship manager, call Allspring at 1-866-259-3305 or e-mail: allspring.clientadministration@allspring-global.com to request a record of proxies voted on their behalf.

Allspring will publish high-level proxy voting statistics in periodic reports. However, except as otherwise required by law, Allspring has a general policy of not disclosing to any issuer specific or third party how its separate account client proxies are voted.

Approved by the Allspring Proxy Governance Committee: June 13, 2024

BlackRock Investment Stewardship

Proxy voting guidelines for U.S. Securities

January 2024

Contents
Introduction	B-293

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Voting guidelines	B-293
Boards and directors	B-294
Auditors and audit-related issues	B-298
Capital structure proposals	B-299
Mergers, acquisitions, transactions, and other special situations	B-299
Executive compensation	B-300
Material sustainability-related risks and opportunities	B-302
General corporate governance matters	B-304
Shareholder Protections	B-305

If you would like additional information, please contact: ContactStewardship@blackrock.com

These guidelines should be read in conjunction with the BlackRock Investment Stewardship Global Principles.

Introduction

BlackRock’s clients depend on us to help them meet their long-term investment goals. Given that the business decisions that companies make have a direct impact on our clients’ long-term investment outcomes and financial well-being, we consider it one of our responsibilities to promote sound corporate governance as an informed, engaged shareholder on their behalf. At BlackRock, this is the responsibility of the BlackRock Investment Stewardship (BIS) team, which serves as a link between BlackRock’s clients and the companies we invest in on their behalf. In BIS’ experience, sound governance is critical to the success of a company, the protection of investors’ interests, and long-term financial value creation.

To that end, BIS takes a long-term approach to stewardship, focused on understanding the drivers of risk and financial value creation in companies’ business models. We do this in three ways:

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Engaging with companies to build our understanding of a company’s approach to corporate governance and business risks and opportunities.

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Voting at shareholder meetings on management and shareholder proposals on behalf of clients who have delegated voting authority to BlackRock. Voting is the formal mechanism through which we signal our support for, or concerns about, how companies are serving the long-term financial interests of BlackRock’s clients.

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Contributing to emerging thinking on stewardship to share our perspectives with clients, policymakers, and others in the corporate governance ecosystem, on topical and emerging stewardship issues that we believe may impact clients’ financial interests as long-term investors.

The following issue-specific proxy voting guidelines (the “Guidelines”) summarize BIS’ philosophy and approach to engagement and voting, as well as our view of governance best practices and the roles and responsibilities of boards and directors for publicly listed U.S. companies. These Guidelines are not intended to limit the analysis of individual issues at specific companies or provide a guide to how BIS will engage and/or vote in every instance. They are to be applied with discretion, taking into consideration the range of issues and facts specific to the company, as well as individual ballot items at shareholder meetings.

Voting guidelines

These guidelines are divided into eight key themes, which group together the issues that frequently appear on the agenda of shareholder meetings:

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Boards and directors

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Auditors and audit-related issues

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Capital structure

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Mergers, acquisitions, asset sales, and other special transactions

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Executive compensation

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Material sustainability-related risks and opportunities

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General corporate governance matters

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Shareholder protections

Boards and directors

We believe that an effective and well-functioning board that has appropriate governance structures to facilitate oversight of a company’s management and strategic initiatives is critical to the long-term financial success of a company and the protection of shareholders’ economic interests. In our view, a strong board can be a competitive advantage to a company, providing valuable oversight of and perspectives to management on the most important decisions in support of long-term financial performance. As part of their responsibilities, board members have a fiduciary duty to shareholders to oversee the strategic direction, operations, and risk management of a company. For this reason, BIS sees engagement with and the election of directors as one of our most important responsibilities.

Disclosure of material risks that affect the company’s long-term strategy and financial value creation, including material sustainability-related factors when relevant, is essential for shareholders to appropriately understand and assess how effectively management is identifying, managing, and mitigating such risks.

Where a company has not adequately disclosed and demonstrated that its board has fulfilled these corporate governance and risk oversight responsibilities, we will consider voting against the election of directors who, on our assessment, have particular responsibility for the issues, as indicated below.

Independence

It is our view that a majority of the directors on the board should be independent to ensure objectivity in the decision-making of the board and its ability to oversee management. In addition, all members of audit, compensation, and nominating/governance board committees should be independent. Our view of independence may vary from listing standards.

Common impediments to independence may include:

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Employment as a senior executive by the company or a subsidiary within the past five years

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An equity ownership in the company in excess of 20%

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Having any other interest, business, or relationship (professional or personal) which could, or could reasonably be perceived to, materially interfere with the director’s ability to act in the best interests of the company and its shareholders

We may vote against directors who we do not consider to be independent, including at controlled companies, when we believe oversight could be enhanced with greater independent director representation. To signal our concerns, we may also vote against the chair of the nominating/governance committee, or where no chair exists, the nominating/governance committee member with the longest tenure.

Oversight role of the board

The board should exercise appropriate oversight of management and the business activities of the company. Where we determine that a board has failed to do so in a way that may impede a company’s ability to deliver long-term financial value, we may vote against the responsible committees and/or individual directors.

Common circumstances are illustrated below:

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Where the board has failed to facilitate quality, independent auditing or accounting practices, we may vote against members of the audit committee

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Where the company has failed to provide shareholders with adequate disclosure to conclude that appropriate strategic consideration is given to material risk factors (including, where relevant, material sustainability factors), we may vote against members of the responsible committee, or the most relevant director

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Where it appears that a director has acted (at the company or at other companies) in a manner that compromises their ability to represent the best long-term economic interests of shareholders, we may vote against that individual

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Where a director has a multi-year pattern of poor attendance at combined board and applicable committee meetings, or a director has poor attendance in a single year with no disclosed rationale, we may vote against that individual. Excluding exigent circumstances, BIS generally considers attendance at less than 75% of the combined board and applicable committee meetings to be poor attendance

Sufficient capacity

	Total # of Public Boards
Public Company Executives1	2
Non-Executive Directors	4

In addition, we recognize that board leadership roles may vary in responsibility and time requirements in different markets around the world. In particular, where a director maintains a Chair role of a publicly listed company in European markets, we may consider that responsibility as equal to two board commitments, consistent with our EMEA Proxy Voting Guidelines. We will take the total number of board commitments across our global policies into account for director elections.

Risk oversight

Companies should have an established process for identifying, monitoring, and managing business and material risks. Independent directors should have access to relevant management information and outside advice, as appropriate, to ensure they can properly oversee risk. We encourage companies to provide transparency around risk management, mitigation, and reporting to the board. We are particularly interested in understanding how risk oversight processes evolve in response to changes in corporate strategy and/or shifts in the business and related risk environment. Comprehensive disclosures provide investors with a sense of the company’s long-term risk management practices and, more broadly, the quality of the board’s oversight. In the absence of robust disclosures, we may reasonably conclude that companies are not adequately managing risk.

Board Structure

Classified board of directors/staggered terms

Directors should be re-elected annually; classification of the board generally limits shareholders’ rights to regularly evaluate a board’s performance and select directors. While we will typically support proposals requesting board de-classification, we may make exceptions, should the board articulate an appropriate strategic rationale for a classified board structure. This may include when a company needs consistency and stability during a time of transition, e.g., newly public companies or companies undergoing a strategic restructuring. A classified board structure may also be justified at non-operating companies, e.g., closed-end funds or business development companies (BDC),2 in certain circumstances. However, in these instances, boards should periodically review the rationale for a classified structure and consider when annual elections might be more appropriate.

Without a voting mechanism to immediately address concerns about a specific director, we may choose to vote against the directors up for election at the time (see “Shareholder rights” for additional detail).

1 A public company executive is defined as a Named Executive Officer or Executive Chair.

2 A BDC is a special investment vehicle under the Investment Company Act of 1940 that is designed to facilitate capital formation for small and middle-market companies.

3 To this end, we do not view shareholder proposals asking for the separation of Chair and CEO to be a proxy for other concerns we may have at the company for which a vote against directors would be more appropriate. Rather, support for such a proposal might arise in the case of overarching and sustained governance concerns such as lack of independence or failure to oversee a material risk over consecutive years.

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Independent Leadership

There are two commonly accepted structures for independent leadership to balance the CEO role in the boardroom: 1) an Independent Chair; or 2) a Lead Independent Director when the roles of Chair and CEO are combined, or when the Chair is otherwise not independent.

In the absence of a significant governance concern, we defer to boards to designate the most appropriate leadership structure to ensure adequate balance and independence.3 However, BIS may vote against the most senior non-executive member of the board when appropriate independence is lacking in designated leadership roles.

In the event that the board chooses a combined Chair/CEO or a non-independent Chair, we support the designation of a Lead Independent Director, with the ability to: 1) provide formal input into board meeting agendas; 2) call meetings of the independent directors; and 3) preside at meetings of independent directors. These roles and responsibilities should be disclosed and easily accessible.

The following table illustrates examples4 of responsibilities under each board leadership model:

	Combined Chair/CEO or CEO + Non-independent Chair		Separate Independent Chair
	Chair/CEO or Non- independent Chair	Lead Independent Director	Independent Chair
Board Meetings	Authority to call full meetings of the board of directors	Authority to call meetings of independent directors Attends full meetings of the board of directors Briefs CEO on issues arising from executive sessions	Authority to call full meetings of the board of directors
Agenda	Primary responsibility for shaping board agendas, consulting with the lead independent director	Collaborates with chair/CEO to set board agenda and board information	Primary responsibility for shaping board agendas, in conjunction with CEO
Board Communications	Communicates with all directors on key issues and concerns outside of full board meetings	Facilitates discussion among independent directors on key issues and concerns outside of full board meetings, including contributing to the oversight of CEO and management succession planning	Facilitates discussion among independent directors on key issues and concerns outside of full board meetings, including contributing to the oversight of CEO and management succession planning

CEO and management succession planning

Companies should have a robust CEO and senior management succession plan in place at the board level that is reviewed and updated on a regular basis. Succession planning should cover scenarios over both the long-term, consistent with the strategic direction of the company and identified leadership needs over time, as well as the short-term, in the event of an unanticipated executive departure. We encourage the company to explain their executive succession planning process, including where accountability lies within the boardroom for this task, without prematurely divulging sensitive information commonly associated with this exercise.

Where there is significant concern regarding the board’s succession planning efforts, we may vote against members of the responsible committee, or the most relevant director.

During a CEO transition, companies may elect for the departing CEO to maintain a role in the boardroom. We ask for disclosures to understand the timeframe and responsibilities of this role. In such instances, we typically look for the board to have appropriate independent leadership structures in place. (See chart above.)

4 This table is for illustrative purposes only. The roles and responsibilities cited here are not all-encompassing and are noted for reference as to how these leadership roles are defined.

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Director compensation and equity programs

Compensation for directors should generally be structured to attract and retain directors, while also aligning their interests with those of shareholders. In our view, director compensation packages that are based on the company’s long-term value creation and include some form of long-term equity compensation are more likely to meet this goal.

Board composition and effectiveness

Director qualifications and skills

We encourage boards to periodically review director qualifications and skills to ensure relevant experience and diverse perspectives are represented in the boardroom. To this end, performance reviews and skills assessments should be conducted by the nominating/governance committee or the Lead Independent Director. This process may include internal board evaluations; however, boards may also find it useful to periodically conduct an assessment with a third party. We encourage boards to disclose their approach to evaluations, including objectives of the evaluation; if an external party conducts the evaluation; the frequency of the evaluations; and, whether that evaluation occurs on an individual director basis.

Board term limits and director tenure

Where boards find that age limits or term limits are a valuable mechanism for ensuring periodic board refreshment, we generally defer to the board’s determination in setting such limits. BIS will also consider the average board tenure to evaluate processes for board renewal. We may oppose boards that appear to have an insufficient mix of short-, medium-, and long-tenured directors.

In addition, where boards have adopted corporate governance guidelines regarding committee leadership and/or membership rotation, we appreciate clear disclosure of those policies.

Board diversity

As noted above, highly qualified, engaged directors with professional characteristics relevant to a company’s business enhance the ability of the board to add value and be the voice of shareholders in board discussions. In our view, a strong board provides a competitive advantage to a company, providing valuable oversight and contributing to the most important management decisions that support long-term financial performance.

It is in this context that we are interested in diversity in the boardroom. We see it as a means to promoting diversity of thought and avoiding ‘group think’ in the board’s advising of and overseeing management. It can help boards to have deeper discussions and make more resilient decisions. We ask boards to disclose how diversity is considered in board composition, including professional characteristics, such as a director’s relevant industry experience, specialist areas of expertise and geographic location; as well as demographic characteristics such as gender, race/ethnicity, and age.

We look to understand a board’s diversity in the context of a company’s domicile, market capitalization, business model, and strategy. Increasingly, we see leading boards nominating directors from diverse backgrounds which helps ensure boards can more effectively understand the company’s customers, employees, and communities. Self-identified board demographic diversity can usefully be disclosed in aggregate, consistent with local law. We encourage boards to aspire to meaningful diversity of membership, at least consistent with local regulatory requirements and best practices, while recognizing that building a strong, diverse board can take time. We take a case-by-case approach and consider the size of the board in our evaluation of overall composition and diversity. Business model, strategy, location, and company size may also impact our analysis of board diversity. We acknowledge that these factors may also play into the various elements of diversity that a board may attract. We look for disclosures from companies to help us understand their approach and do not prescribe any particular board composition.

In the U.S., we believe that boards should aspire to at least 30% diversity of membership,5 and we encourage large companies, such as those in the S&P 500, to lead in achieving this standard. In light of market developments,6 an informative indicator of diversity for such companies is having at least two women and a director who identifies as a member of an underrepresented group.7 We recognize that companies with smaller market capitalizations and in certain

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sectors may face more challenges. Among these smaller companies, we look for the presence of diversity and take into consideration the steps that companies are taking to ensure diversity on their board.

In order to help investors understand overall diversity, we look to boards to disclose:

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The process by which candidates for board positions are identified, including whether professional firms or other resources outside of incumbent directors’ networks are engaged to identify and/or assess candidates, and whether a diverse slate of nominees is considered for all available board nominations

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How directors’ professional characteristics, which may include domain expertise such as finance or technology, and sector- or market-specific experience, are complementary and link to the company’s long-term strategy

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How diversity, including professional characteristics and demographic factors, is considered in board composition, given the company’s long-term strategy and business model

To the extent that, based on our assessment of corporate disclosures, a company has not adequately explained their approach to diversity in their board composition, we may vote against members of the nominating/governance committee. Our publicly available commentary provides more information on our approach to board diversity.

Board size

We typically defer to the board in setting the appropriate size and believe that directors are generally in the best position to assess the optimal board size to ensure effectiveness. However, we may vote against the appropriate committees and/or individual directors if, in our view, the board is ineffective in its oversight, either because it is too small to allow for the necessary range of skills and experience or too large to function efficiently.

Board responsiveness and shareholder rights

Shareholder rights

Where we determine that a board has not acted in the best interests of the company’s shareholders, or takes action to unreasonably limit shareholder rights, we may vote against the relevant committees and/or individual directors. Common circumstances are illustrated below:

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The independent Chair or Lead Independent Director and members of the nominating/governance committee, where a board implements or renews a poison pill without shareholder approval

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The independent Chair or Lead Independent Director and members of the nominating/governance committee, where a board amends the charter/articles/bylaws and where the effect may be to entrench directors or to unreasonably reduce shareholder rights

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Members of the compensation committee where the company has repriced options without shareholder approval

If a board maintains a classified structure, it is possible that the director(s) or committee members with whom we have a particular concern may not be subject to election in the year that the concern arises. In such situations, we may register our concern by voting against the most relevant director(s) up for election.

5 For a discussion on the different impacts of diversity see: McKinsey, “Diversity Wins: How Inclusion Matters”, May 2022; Harvard Business Review, “Diverse Teams Feel Less Comfortable – and That’s Why They Perform Better”, September 2016; “Do Diverse Directors Influence DEI Outcomes”, September 2022.

6 Spierings, Merel “Corporate Director Diversity Can Contribute to Board Effectiveness” Harvard Law School Forum on Corporate Governance (Nov. 2023) https://corpgov.law.harvard.edu/2023/11/24/us-public-company-board-diversity-in-2023/

7 Including, but not limited to, individuals who identify as Black or African American, Hispanic or Latinx, Asian, Native American or Alaska Native, or Native Hawaiian or Pacific Islander; individuals who identify as LGBTQ+; individuals who identify as underrepresented based on national, Indigenous, religious, or cultural identity; individuals with disabilities; and veterans.

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Responsiveness to shareholders

A board should be engaged with and responsive to the company’s shareholders, including acknowledging voting outcomes for director elections, compensation, shareholder proposals, and other ballot items. Where we determine that a board has not substantially addressed shareholder concerns that we deem material to the business, we may vote against the responsible committees and/or individual directors. Common circumstances are illustrated below:

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The Independent Chair or Lead Independent Director, members of the nominating/governance committee, and/or the longest tenured director(s), where we observe a lack of board responsiveness to shareholders, evidence of board entrenchment, and/or failure to plan for adequate board member succession

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The chair of the nominating/governance committee, or where the chair is not standing for election, the nominating/governance committee member with the longest tenure, where board member(s) at the most recent election of directors have received against votes from more than 25% of shares voted, and the board has not taken appropriate action to respond to shareholder concerns. This may not apply in cases where BIS did not support the initial vote against such board member(s)

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The Independent Chair or Lead Independent Director and/or members of the nominating/governance committee, where a board fails to consider shareholder proposals that (1) receive substantial support, and (2) in our view, have a material impact on the business, shareholder rights, or the potential for long-term value creation

Majority vote requirements

Directors should generally be elected by a majority of the shares voted. We will normally support proposals seeking to introduce bylaws requiring a majority vote standard for director elections. Majority vote standards generally assist in ensuring that directors who are not broadly supported by shareholders are not elected to serve as their representatives. As a best practice, companies with either a majority vote standard or a plurality vote standard should adopt a resignation policy for directors who do not receive support from at least a majority of votes cast. Where the company already has a sufficiently robust majority voting process in place, we are unlikely to support a shareholder proposal seeking an alternative mechanism.

We note that majority voting may not be appropriate in all circumstances, for example, in the context of a contested election, or for majority-controlled companies or those with concentrated ownership structures.

Cumulative voting

As stated above, a majority vote standard is generally in the best long-term interests of shareholders, as it ensures director accountability through the requirement to be elected by more than half of the votes cast. As such, we will generally oppose proposals requesting the adoption of cumulative voting, which may disproportionately aggregate votes on certain issues or director candidates.

Auditors and audit-related issues

BIS recognizes the critical importance of financial statements to provide a complete and accurate portrayal of a company’s financial condition. Consistent with our approach to voting on directors, we seek to hold the audit committee of the board responsible for overseeing the management of the independent auditor and the internal audit function at a company.

We may vote against the audit committee members where the board has failed to facilitate quality, independent auditing. We look to public disclosures for insight into the scope of the audit committee responsibilities, including an overview of audit committee processes, issues on the audit committee agenda, and key decisions taken by the audit committee. We take particular note of cases involving significant financial restatements or material weakness disclosures, and we look for timely disclosure and remediation of accounting irregularities.

The integrity of financial statements depends on the auditor effectively fulfilling its role. To that end, we favor an independent auditor. In addition, to the extent that an auditor fails to reasonably identify and address issues that eventually lead to a significant financial restatement, or the audit firm has violated standards of practice, we may also vote against ratification.

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From time to time, shareholder proposals may be presented to promote auditor independence or the rotation of audit firms. We may support these proposals when they are consistent with our views as described above.

Capital structure proposals

Equal voting rights

In our view, shareholders should be entitled to voting rights in proportion to their economic interests. In addition, companies that have implemented dual or multiple class share structures should review these structures on a regular basis, or as company circumstances change. Companies with multiple share classes should receive shareholder approval of their capital structure on a periodic basis via a management proposal on the company’s proxy. The proposal should give unaffiliated shareholders the opportunity to affirm the current structure or establish mechanisms to end or phase out controlling structures at the appropriate time, while minimizing costs to shareholders. Where companies are unwilling to voluntarily implement “one share, one vote” within a specified timeframe, or are unresponsive to shareholder feedback for change over time, we generally support shareholder proposals to recapitalize stock into a single voting class.

Blank check preferred stock

We frequently oppose proposals requesting authorization of a class of preferred stock with unspecified voting, conversion, dividend distribution, and other rights (“blank check” preferred stock) because they may serve as a transfer of authority from shareholders to the board and as a possible entrenchment device. We generally view the board’s discretion to establish voting rights on a when-issued basis as a potential anti-takeover device, as it affords the board the ability to place a block of stock with an investor sympathetic to management, thereby foiling a takeover bid without a shareholder vote.

Nonetheless, we may support the proposal where the company:

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Appears to have a legitimate financing motive for requesting blank check authority

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Has committed publicly that blank check preferred shares will not be used for anti-takeover purposes

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Has a history of using blank check preferred stock for financings

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Has blank check preferred stock previously outstanding such that an increase would not necessarily provide further anti-takeover protection but may provide greater financing flexibility

Increase in authorized common shares

BIS will evaluate requests to increase authorized shares on a case-by-case basis, in conjunction with industry-specific norms and potential dilution, as well as a company’s history with respect to the use of its common shares.

Increase or issuance of preferred stock

We generally support proposals to increase or issue preferred stock in cases where the company specifies the voting, dividend, conversion, and other rights of such stock and where the terms of the preferred stock appear reasonable.

Stock splits

We generally support stock splits that are not likely to negatively affect the ability to trade shares or the economic value of a share. We generally support reverse stock splits that are designed to avoid delisting or to facilitate trading in the stock, where the reverse split will not have a negative impact on share value (e.g., one class is reduced while others remain at pre- split levels). In the event of a proposal for a reverse split that would not proportionately reduce the company’s authorized stock, we apply the same analysis we would use for a proposal to increase authorized stock.

Mergers, acquisitions, transactions, and other special situations

Mergers, acquisitions, and transactions

In assessing mergers, acquisitions, or other transactions – including business combinations involving Special Purpose Acquisition Companies (“SPACs”) – BIS’ primary consideration is the long-term economic interests of our clients as shareholders. Boards should clearly explain the economic and strategic rationale for any proposed transactions or

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material changes to the business. We will review a proposed transaction to determine the degree to which it has the potential to enhance long-term shareholder value. While mergers, acquisitions, asset sales, business combinations, and other special transaction proposals vary widely in scope and substance, we closely examine certain salient features in our analyses, such as:

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The degree to which the proposed transaction represents a premium to the company’s trading price. We consider the share price over multiple time periods prior to the date of the merger announcement. We may consider comparable transaction analyses provided by the parties’ financial advisors and our own valuation assessments. For companies facing insolvency or bankruptcy, a premium may not apply

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There should be clear strategic, operational, and/or financial rationale for the combination

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Unanimous board approval and arm’s-length negotiations are preferred. We will consider whether the transaction involves a dissenting board or does not appear to be the result of an arm’s-length bidding process. We may also consider whether executive and/or board members’ financial interests appear likely to affect their ability to place shareholders’ interests before their own, as well as measures taken to address conflicts of interest

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We prefer transaction proposals that include the fairness opinion of a reputable financial advisor assessing the value of the transaction to shareholders in comparison to recent similar transactions

Contested director elections and special situations

Contested elections and other special situations8 are assessed on a case-by-case basis. We evaluate a number of factors, which may include: the qualifications and past performance of the dissident and management candidates; the validity of the concerns identified by the dissident; the viability of both the dissident’s and management’s plans; the ownership stake and holding period of the dissident; the likelihood that the dissident’s strategy will produce the desired change; and whether the dissident represents the best option for enhancing long-term shareholder value.

We will evaluate the actions that the company has taken to limit shareholders’ ability to exercise the right to nominate dissident director candidates, including those actions taken absent the immediate threat of a contested situation. BIS may take voting action against directors (up to and including the full board) where those actions are viewed as egregiously infringing on shareholder rights.

We will consider a variety of possible voting outcomes in contested situations, including the ability to support a mix of management and dissident nominees.

Poison pill plans

Where a poison pill is put to a shareholder vote by management, our policy is to examine these plans individually. Although we have historically opposed most plans, we may support plans that include a reasonable “qualifying offer clause.” Such clauses typically require shareholder ratification of the pill and stipulate a sunset provision whereby the pill expires unless it is renewed. These clauses also tend to specify that an all-cash bid for all shares that includes a fairness opinion and evidence of financing does not trigger the pill, but forces either a special meeting at which the offer is put to a shareholder vote or requires the board to seek the written consent of shareholders, where shareholders could rescind the pill at their discretion. We may also support a pill where it is the only effective method for protecting tax or other economic benefits that may be associated with limiting the ownership changes of individual shareholders. Lastly, we look for shareholder approval of poison pill plans within one year of adoption of implementation.

Reimbursement of expense for successful shareholder campaigns

We generally do not support shareholder proposals seeking the reimbursement of proxy contest expenses, even in situations where we support the shareholder campaign. Introducing the possibility of such reimbursement may incentivize disruptive and unnecessary shareholder campaigns.

8 Special situations are broadly defined as events that are non-routine and differ from the normal course of business for a company’s shareholder meeting, involving a solicitation other than by management with respect to the exercise of voting rights in a manner inconsistent with management’s recommendation. These may include instances where shareholders nominate director candidates, oppose the view of management and/or the board on mergers, acquisitions, or other transactions, etc.

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Executive compensation

A company’s board of directors should put in place a compensation structure that balances incentivizing, rewarding, and retaining executives appropriately across a wide range of business outcomes. This structure should be aligned with shareholder interests, particularly the generation of sustainable, long-term value.

The compensation committee should carefully consider the specific circumstances of the company and the key individuals the board is focused on incentivizing. We encourage companies to ensure that their compensation plans incorporate appropriate and rigorous performance metrics, consistent with corporate strategy and market practice. Performance-based compensation should include metrics that are relevant to the business and stated strategy and/or risk mitigation efforts. Goals, and the processes used to set these goals, should be clearly articulated and appropriately rigorous. We use third party research, in addition to our own analysis, to evaluate existing and proposed compensation structures. We hold members of the compensation committee, or equivalent board members, accountable for poor compensation practices and/or structures.

There should be a clear link between variable pay and company performance that drives sustained value creation for our clients as shareholders. Where compensation structures provide for a front-loaded9 award, we look for appropriate structures (including vesting and/or holding periods) that motivate sustained performance for shareholders over a number of years. We generally do not favor programs focused on awards that require performance levels to be met and maintained for a relatively short time period for payouts to be earned, unless there are extended vesting and/or holding requirements.

Compensation structures should generally drive outcomes that align the pay of the executives with performance of the company and the value received by shareholders. When evaluating performance, we examine both executive teams’ efforts, as well as outcomes realized by shareholders. Payouts to executives should reflect both the executive’s contributions to the company’s ongoing success, as well as exogenous factors that impacted shareholder value. Where discretion has been used by the compensation committee, we look for disclosures relating to how and why the discretion was used and how the adjusted outcome is aligned with the interests of shareholders. While we believe special awards10 should be used sparingly, we acknowledge that there may be instances when such awards are appropriate. When evaluating these awards, we consider a variety of factors, including the magnitude and structure of the award, the scope of award recipients, the alignment of the grant with shareholder value, and the company’s historical use of such awards, in addition to other company-specific circumstances.

We acknowledge that the use of peer group evaluation by compensation committees can help calibrate competitive pay; however, we are concerned when the rationale for increases in total compensation is solely based on peer benchmarking.

We support incentive plans that foster the sustainable achievement of results – both financial and non-financial – consistent with the company’s strategic initiatives. Compensation committees should guard against contractual arrangements that would entitle executives to material compensation for early termination of their contract. Finally, pension contributions and other deferred compensation arrangements should be reasonable in light of market practices. Our publicly available commentary provides more information on our approach to executive compensation.

Where executive compensation appears excessive relative to the performance of the company and/or compensation paid by peers, or where an equity compensation plan is not aligned with shareholders’ interests, we may vote against members of the compensation committee.

“Say on Pay” advisory resolutions

In cases where there is a “Say on Pay” vote, BIS will respond to the proposal as informed by our evaluation of compensation practices at that particular company and in a manner that appropriately addresses the specific question posed to shareholders. Where we conclude that a company has failed to align pay with performance, we will generally vote against the management compensation proposal and relevant compensation committee members.

9 Front-loaded awards are generally those that accelerate the grant of multiple years’ worth of compensation in a single year.

10 “Special awards” refers to awards granted outside the company’s typical compensation program.

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Frequency of “Say on Pay” advisory resolutions

BIS will generally support annual advisory votes on executive compensation. It is our view that shareholders should have the opportunity to express feedback on annual incentive programs and changes to long-term compensation before multiple cycles are issued. Where a company has failed to implement a “Say on Pay” advisory vote within the frequency period that received the most support from shareholders or a “Say on Pay” resolution is omitted without explanation, BIS may vote against members of the compensation committee.

Clawback proposals

We generally favor prompt recoupment from any senior executive whose compensation was based on faulty financial reporting or deceptive business practices. We appreciate when companies disclose recovery policies in compliance with the Dodd-Frank Wall Street Reform and Consumer Protection Act. We also favor recoupment from or the foregoing of the grant of any awards by any senior executive whose behavior caused material financial harm to shareholders, material reputational risk to the company, or resulted in a criminal investigation, even if such actions did not ultimately result in a material restatement of past results. This includes, but is not limited to, settlement agreements arising from such behavior and paid for directly by the company. We typically support shareholder proposals on these matters unless the company already has a robust clawback policy that sufficiently addresses our concerns.

Employee stock purchase plans

Employee stock purchase plans (“ESPP”) are an important part of a company’s overall human capital management strategy and can provide performance incentives to help align employees’ interests with those of shareholders. The most common form of ESPP qualifies for favorable tax treatment under Section 423 of the Internal Revenue Code. We will typically support qualified ESPP proposals.

Equity compensation plans

BIS supports equity plans that align the economic interests of directors, managers, and other employees with those of shareholders.

Boards should establish policies prohibiting the use of equity awards in a manner that could disrupt the intended alignment with shareholder interests, such as the excessive pledging or heading of stock. We may support shareholder proposals requesting the establishment of such policies.

Our evaluation of equity compensation plans is based on a company’s executive pay and performance relative to peers and whether the plan plays a significant role in a pay-for-performance disconnect. We generally oppose plans that contain “evergreen” provisions, which allow for automatic annual increases of shares available for grant without requiring further shareholder approval; we note that the aggregate impacts of such increases are difficult to predict and may lead to significant dilution. We also generally oppose plans that allow for repricing without shareholder approval. We may oppose plans that provide for the acceleration of vesting of equity awards even in situations where an actual change of control may not occur. We encourage companies to structure their change of control provisions to require the termination of the covered employee before acceleration or special payments are triggered (commonly referred to as “double trigger” change of control provisions).

Golden parachutes

We generally view golden parachutes as encouragement to management to consider transactions that might be beneficial to shareholders. However, a large potential payout under a golden parachute arrangement also presents the risk of motivating a management team to support a sub-optimal sale price for a company.

When determining whether to support or oppose an advisory vote on a golden parachute plan, BIS may consider several factors, including:

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Whether we determine that the triggering event is in the best interests of shareholders

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Whether management attempted to maximize shareholder value in the triggering event

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The percentage of total premium or transaction value that will be transferred to the management team, rather than shareholders, as a result of the golden parachute payment

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Whether excessively large excise tax gross-up payments are part of the pay-out

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Whether the pay package that serves as the basis for calculating the golden parachute payment was reasonable in light of performance and peers

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Whether the golden parachute payment will have the effect of rewarding a management team that has failed to effectively manage the company

It may be difficult to anticipate the results of a plan until after it has been triggered; as a result, BIS may vote against a golden parachute proposal even if the golden parachute plan under review was approved by shareholders when it was implemented.

We may support shareholder proposals requesting that implementation of such arrangements require shareholder approval.

Option exchanges

There may be legitimate instances where underwater options create an overhang on a company’s capital structure and a repricing or option exchange may be warranted. We will evaluate these instances on a case-by-case basis. BIS may support a request to reprice or exchange underwater options under the following circumstances:

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The company has experienced significant stock price decline as a result of macroeconomic trends, not individual company performance

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Directors and executive officers are excluded; the exchange is value neutral or value creative to shareholders; tax, accounting, and other technical considerations have been fully contemplated

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There is clear evidence that absent repricing, employee incentives, retention, and/or recruiting may be impacted

BIS may also support a request to exchange underwater options in other circumstances, if we determine that the exchange is in the best interests of shareholders.

Supplemental executive retirement plans

BIS may support shareholder proposals requesting to put extraordinary benefits contained in supplemental executive retirement plans (“SERP”) to a shareholder vote unless the company’s executive pension plans do not contain excessive benefits beyond what is offered under employee-wide plans.

Material sustainability–related risks and opportunities

It is our view that well-managed companies will effectively evaluate and manage material sustainability-related risks and opportunities relevant to their businesses. As with all risks and opportunities in a company's business model, appropriate oversight of material sustainability considerations is a core component of having an effective governance framework, which supports durable, long-term financial value creation.

When assessing how to vote – including on the election of directors and relevant shareholder proposals – robust disclosures are essential for investors to understand, where appropriate, how companies are integrating material sustainability risks and opportunities across their business and strategic, long-term planning. Where a company has failed to appropriately provide the necessary disclosures and evidence of effective business practices to support our assessment, BIS may express concerns through our engagement and voting. As part of this consideration, we encourage companies to produce sustainability-related disclosures sufficiently in advance of their annual meeting so that the disclosures can be considered in relevant vote decisions.

Robust disclosure is essential for investors to effectively evaluate companies’ strategy and business practices related to material sustainability-related risks and opportunities. Long-term investors like our clients can benefit when companies demonstrate that they have a resilient business model through disclosures that cover governance, strategy, risk management, and metrics and targets, including industry-specific metrics. The International Sustainability Standards Board (ISSB) standards, IFRS S1 and S2,11 provide companies with a useful guide to preparing this disclosure. The standards build on the Task Force on Climate-related Financial Disclosures (TCFD) framework and the standards and metrics developed by the Sustainability Accounting Standards Board (SASB), which have converged under the ISSB.

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We recognize that companies may phase in reporting aligned with the ISSB standards over several years. We also recognize that some companies may report using different standards, which may be required by regulation, or one of a number of voluntary standards. In such cases, we ask that companies highlight the metrics that are industry- or company-specific.

Companies may also disclose any material supranational standards adopted, the industry initiatives in which they participate, any peer group benchmarking undertaken, and any assurance processes to help investors understand their approach to sustainable and responsible business conduct.

Climate risk

While companies in various sectors and geographies may be affected differently by climate-related risks and opportunities, the low-carbon transition is an investment factor that can be material for many companies and economies around the globe.

We seek to understand, from company disclosures and engagement, the strategies companies have in place to manage material risks to, and opportunities for, their long-term business model associated with a range of climate-related scenarios, including a scenario in which global warming is limited to well below 2°C, considering global ambitions to achieve a limit of 1.5°C. As one of many shareholders, and typically a minority one, BlackRock does not tell companies what to do. It is the role of the board and management to set and implement a company's long-term strategy to deliver long-term financial returns.

Our research shows that the low-carbon transition is a structural shift in the global economy that will be shaped by changes in government policies, technology, and consumer preferences, which may be material for many companies.12 Yet the path to a low-carbon economy is deeply uncertain and uneven, with different parts of the economy moving at different speeds. BIS recognizes that it can be challenging for companies to predict the impact of climate-related risk and opportunity on their businesses and operating environments. Many companies are assessing how to navigate the low-carbon transition while delivering long-term value to investors. In this context, we encourage companies to publicly disclose, consistent with their business model and sector, how they intend to deliver long-term financial performance through the transition to a low-carbon economy. Where available, we appreciate companies publishing their transition plan.13

Consistent with the ISSB standards, we are better able to assess preparedness for the low-carbon transition when companies disclose short-, medium- and long-term targets, ideally science-based where these are available for their sector, for scope 1 and 2 greenhouse gas emissions (GHG) reductions and to demonstrate how their targets are consistent with the long-term financial interests of their investors.

While we recognize that regulators in some markets are moving to mandate certain disclosures, at this stage, we view scope 3 emissions differently from scopes 1 and 2, given methodological complexity, regulatory uncertainty, concerns about double-counting, and lack of direct control by companies. We welcome disclosures and commitments companies choose to make regarding scope 3 emissions and recognize these are provided on a good-faith basis as methodology develops. Our publicly available commentary provides more information on our approach to climate-related risks and opportunities.

11 The objective of IFRS S1 General Requirements for Disclosure of Sustainability-related Financial Information is to require an entity to disclose information about its sustainability-related risks and opportunities that is useful to primary users of general-purpose financial reports in making decisions relating to providing resources to the entity. The objective of IFRS S2 Climate-related Disclosures is to require an entity to disclose information about its climate-related risks and opportunities that is useful to primary users of general-purpose financial reports in making decisions relating to providing resources to the entity.

12 BlackRock Investment Institute, “Tracking the low-carbon transition”, July 2023.

13 We have observed that more companies are developing such plans, and public policy makers in a number of markets are signaling their intentions to require them. We view transition plans (TPs) as a method for a company to both internally assess and externally communicate long-term strategy, ambition, objectives, and actions to create financial value through the global transition towards a low-carbon economy. While many initiatives across jurisdictions outline a framework for TPs, there is no consensus on the key elements these plans should contain. We view useful disclosure as that which communicates a company’s approach to managing financially material, business relevant risks and opportunities – including climate-related risks – to deliver long-term financial performance, thus enabling investors to make more informed decisions.

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Natural capital

In addition to climate-related risks and opportunities, the management of nature-related factors is increasingly a component of some companies’ ability to generate durable, long-term financial returns for shareholders, particularly where a company’s strategy is heavily reliant on the availability of natural capital, or whose supply chains are exposed to locations with nature-related risks. We look for such companies to disclose how they manage any reliance and impact on, as well as use of, natural capital, including appropriate risk oversight and relevant metrics and targets, to understand how these factors are integrated into strategy. We will evaluate these disclosures to inform our view of how a company is managing material nature-related risks and opportunities, as well as in our assessment of relevant shareholder proposals. Our publicly available commentary provides more information on our approach to natural capital14.

Key Stakeholder interests

In order to advance long-term shareholders’ interests, companies should consider the interests of the various parties on whom they depend for their success over time. It is for each company to determine their key stakeholders based on what is material to their business and long-term financial performance. For many companies, key stakeholders include employees, business partners (such as suppliers and distributors), clients and consumers, regulators, and the communities in which they operate.

As a long-term shareholder on behalf of our clients, we find it helpful when companies disclose how they have identified their key stakeholders and considered their interests in business decision-making. In addition to understanding broader stakeholder relationships, BIS finds it helpful when companies consider the needs of their workforce today, and the skills required for their future business strategy. We are also interested to understand the role of the board, which is well positioned to ensure that the approach taken is informed by and aligns with the company’s strategy and purpose.

Companies should articulate how they address material adverse impacts that could arise from their business practices and affect critical relationships with their stakeholders. We encourage companies to implement, to the extent appropriate, monitoring processes (often referred to as due diligence) to identify and mitigate potential adverse impacts and grievance mechanisms to remediate any actual adverse material impacts. In our view, maintaining trust within these relationships can contribute to a company’s long-term success.

Human capital management

A company’s approach to human capital management (“HCM”) is a critical factor in fostering an inclusive, diverse, and engaged workforce, which contributes to business continuity, innovation, and long-term value creation. Consequently, we ask companies to demonstrate a robust approach to HCM and provide shareholders with clear and consistent disclosures to help investors understand how a company’s approach aligns with its stated strategy and business model.

Some components of HCM are consistent across most companies, such as the approach to diversity, equity, and inclusion (“DEI”). We ask companies to disclose their approach to DEI as well as workforce demographics, which are baselined by their responses to the U.S. Equal Employment Opportunity Commission’s EEO-1 Survey.

Other relevant HCM factors may be more nuanced to a company’s strategy and business model. Those more nuanced factors may include the company’s approach to workplace safety, compensation, benefits, talent development, and performance management. We ask companies to disclose and provide context on the most relevant HCM factors for their business.

Our publicly available commentary provides more information on our approach to HCM.

Corporate political activities

Companies may engage in certain political activities, within legal and regulatory limits, in order to support public policy matters material to their long-term strategies. These activities can also create risks, including: the potential for allegations of corruption; certain reputational risks; and risks that arise from the complex legal, regulatory, and

14 Given the growing awareness of the materiality of these issues for certain businesses, enhanced reporting on a company's natural capital dependencies and impacts would aid investors’ understanding. In our view, the final recommendations of the Taskforce on Nature-related Financial Disclosures may prove useful to some companies. We recognize that some companies may report using different standards, which may be required by regulation, or one of a number of other private sector standards.

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compliance considerations associated with corporate political spending and lobbying activity. Companies that engage in political activities should develop and maintain robust processes, including board oversight, to guide these activities and mitigate risks.

We depend on companies to provide accessible and clear disclosures so that investors can easily understand how their political activities support their long-term strategy, including on stated public policy priorities. When presented with shareholder proposals requesting increased disclosure on corporate political activities, BIS will evaluate publicly available information to consider how a company’s lobbying and political activities may impact the company. We will also evaluate whether there is general consistency between a company’s stated positions on policy matters material to their strategy and the material positions taken by significant industry groups of which they are a member. We may decide to support a shareholder proposal requesting additional disclosures if we identify a material inconsistency or determine that further transparency may clarify how the company’s political activities support its long-term strategy. Our publicly available commentary provides more information on our approach to corporate political activities.

General corporate governance matters

IPO governance

Boards should disclose how the corporate governance structures adopted upon a company’s initial public offering (“IPO”) are in shareholders’ best long-term interests. We also ask boards to conduct a regular review of corporate governance and control structures, such that boards might evolve foundational corporate governance structures as company circumstances change, without undue costs and disruption o shareholders. In our letter on unequal voting structures, we articulate our view that “one vote for one share” is the preferred structure for publicly-traded companies. We also recognize the potential benefits of dual class shares to newly public companies as they establish themselves; however, these structures should have a specific and limited duration. We will generally engage newly listed companies on topics such as classified boards and supermajority vote provisions to amend bylaws, as we think that such arrangements may not be in the best interests of shareholders over the long-term.

We may apply a one-year grace period for the application of certain director-related guidelines (including, but not limited to, responsibilities on other public company boards and board composition concerns), during which we ask boards to take steps to bring corporate governance standards in line with market norms.

Further, if a company qualifies as an emerging growth company (an “EGC”) under the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”), we will give consideration to the NYSE and NASDAQ governance exemptions granted under the JOBS Act for the duration such a company is categorized as an EGC. An EGC should have an independent audit committee by the first anniversary of its IPO, with our standard approach to voting on auditors and audit-related issues applicable in full for an EGC on the first anniversary of its IPO.

Corporate form

Proposals to change a corporation’s form, including those to convert to a public benefit corporation (“PBC”) structure, should clearly articulate the stakeholder groups the company seeks to benefit and provide detail on how the interests of shareholders would be augmented or adversely affected with the change to a PBC. These disclosures should also include the accountability and voting mechanisms that would be available to shareholders. We generally support management proposals to convert to a PBC if our analysis indicates that shareholders’ interests are adequately protected. Corporate form shareholder proposals are evaluated on a case-by-case basis.

Shareholder proposals

When assessing shareholder proposals, BIS evaluates each proposal on its merit, with a singular focus on its implications for long-term financial value creation by that company. We would not support proposals that we believe would result in over-reaching into the basic business decisions of the company. In addition, we believe it helpful for companies to disclose the names of the proponent or organization that has submitted or advised on the proposal. We consider the business and economic relevance of the issue raised, as well as its materiality and the urgency with which our experience indicates it should be addressed.

Where a proposal is focused on a material business risk that we agree needs to be addressed and the intended outcome is consistent with long-term financial value creation, we will look to the board and management to demonstrate that the

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company has met the intent of the request made in the shareholder proposal. Where our analysis and/or engagement indicate an opportunity for improvement in the company’s approach to the issue, we may support shareholder proposals that are reasonable and not unduly prescriptive or constraining on management.

We recognize that some shareholder proposals bundle topics and/or specific requests and include supporting statements that explain the reasoning or objectives of the proponent. In voting on behalf of clients, we do not submit or edit proposals or the supporting statements – we must vote yes or no on the proposal as phrased by the proponent. Therefore, when we vote in support of a proposal, we are not necessarily endorsing every element of the proposal or the reasoning, objectives, or supporting statement of the proponent. We may support a proposal for different reasons from those put forth by the proponent, when we believe that, overall, it can advance our clients' long-term financial interests. We would normally explain to the company our rationale for supporting such proposals.

Alternatively, or in addition, we may vote against the election of one or more directors if, in our assessment, the board has not responded sufficiently or with an appropriate sense of urgency. We may also support a proposal if management is on track, but we believe that voting in favor might accelerate efforts to address a material risk.

Exclusive forum provisions

BIS generally supports proposals to seek exclusive forum for certain shareholder litigation. In cases where a board unilaterally adopts exclusive forum provisions that we consider unfavorable to the interests of shareholders, we will vote against the Independent Chair or Lead Independent director and members of the nominating/governance committee.

Reincorporation

We will evaluate the economic and strategic rationale behind the company’s proposal to reincorporate on a case-by-case basis. In all instances, we will evaluate the changes to shareholder protections under the new charter/articles/bylaws to assess whether the move increases or decreases shareholder protections. Where we find that shareholder protections are diminished, we may support reincorporation if we determine that the overall benefits outweigh the diminished rights.

Multi-jurisdictional companies

Where a company is listed on multiple exchanges or incorporated in a country different from their primary listing, we will seek to apply the most relevant market guideline(s) to our analysis of the company’s governance structure and specific proposals on the shareholder meeting agenda. In doing so, we typically consider the governance standards of the company’s primary listing, the market standards by which the company governs themselves, and the market context of each specific proposal on the agenda. If the relevant standards are silent on the issue under consideration, we will use our professional judgment as to what voting outcome would best protect the long-term economic interests of investors. Companies should disclose the rationale for their selection of primary listing, country of incorporation, and choice of governance structures, particularly where there is conflict between relevant market governance practices.

Adjourn meeting to solicit additional votes

We generally support such proposals unless the agenda contains items that we judge to be detrimental to shareholders’ best long-term economic interests.

Bundled proposals

Shareholders should have the opportunity to review substantial governance changes individually without having to accept bundled proposals. Where several measures are grouped into one proposal, BIS may reject certain positive changes when linked with proposals that generally contradict or impede the rights and economic interests of shareholders.

Other business

We oppose voting on matters where we are not given the opportunity to review and understand those measures and carry out an appropriate level of shareholder oversight.

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Shareholder protections

Amendment to charter/articles/bylaws

Shareholders should have the right to vote on key corporate governance matters, including changes to governance mechanisms and amendments to the charter/articles/bylaws. We may vote against certain directors where changes to governing documents are not put to a shareholder vote within a reasonable period of time, particularly if those changes have the potential to impact shareholder rights (see “Director elections”). In cases where a board’s unilateral adoption of changes to the charter/articles/bylaws promotes cost and operational efficiency benefits for the company and its shareholders, we may support such action if it does not have a negative effect on shareholder rights or the company’s corporate governance structure.

When voting on a management or shareholder proposal to make changes to the charter/articles/bylaws, we will consider in part the company’s and/or proponent’s publicly stated rationale for the changes; the company’s governance profile and history; relevant jurisdictional laws; and situational or contextual circumstances which may have motivated the proposed changes, among other factors. We will typically support amendments to the charter/articles/bylaws where the benefits to shareholders outweigh the costs of failing to make such changes.

Proxy access

It is our view that long-term shareholders should have the opportunity, when necessary and under reasonable conditions, to nominate directors on the company’s proxy card.15

Securing the right of shareholders to nominate directors without engaging in a control contest can enhance shareholders’ ability to meaningfully participate in the director election process, encourage board attention to shareholder interests, and provide shareholders an effective means of directing that attention where it is lacking. Proxy access mechanisms should provide shareholders with a reasonable opportunity to use this right without stipulating overly restrictive or onerous parameters for use, and also provide assurances that the mechanism will not be subject to abuse by short-term investors, investors without a substantial investment in the company, or investors seeking to take control of the board.

In general, we support market-standardized proxy access proposals, which allow a shareholder (or group of up to 20 shareholders) holding three percent of a company’s outstanding shares for at least three years the right to nominate the greater of up to two directors or 20% of the board. Where a standardized proxy access provision exists, we will generally oppose shareholder proposals requesting outlier thresholds.

Right to act by written consent

In exceptional circumstances and with sufficiently broad support, shareholders should have the opportunity to raise issues of substantial importance without having to wait for management to schedule a meeting. Accordingly, shareholders should have the right to solicit votes by written consent provided that: 1) there are reasonable requirements to initiate the consent solicitation process (in order to avoid the waste of corporate resources in addressing narrowly supported interests); and 2) shareholders receive a minimum of 50% of outstanding shares to effectuate the action by written consent.

We may oppose shareholder proposals requesting the right to act by written consent in cases where the proposal is structured for the benefit of a dominant shareholder to the exclusion of others, or if the proposal is written to discourage the board from incorporating appropriate mechanisms to avoid the waste of corporate resources when establishing a right to act by written consent. Additionally, we may oppose shareholder proposals requesting the right to act by written consent if the company already provides a shareholder right to call a special meeting that offers shareholders a reasonable opportunity to raise issues of substantial importance without having to wait for management to schedule a meeting.

15 BlackRock is subject to certain regulations and laws in the United States that place restrictions and limitations on how BlackRock can interact with the companies in which we invest on behalf of our clients, including our ability to submit shareholder proposals or elect directors to the board.

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Right to call a special meeting

In exceptional circumstances and with sufficiently broad support, shareholders should have the opportunity to raise issues of substantial importance without having to wait for management to schedule a meeting. Accordingly, shareholders should have the right to call a special meeting in cases where a reasonably high proportion of shareholders (typically a minimum of 15% but no higher than 25%) are required to agree to such a meeting before it is called. However, we may oppose this right in cases where the proposal is structured for the benefit of a dominant shareholder, or where a lower threshold may lead to an ineffective use of corporate resources. We generally think that a right to act via written consent is not a sufficient alternative to the right to call a special meeting.

Consent solicitation

While BlackRock is supportive of the shareholder rights to act by written consent and call a special meeting, BlackRock is subject to certain regulations and laws that place restrictions and limitations on how BlackRock can interact with the companies in which we invest on behalf of our clients, including our ability to participate in consent solicitations. As a result, BlackRock will generally not participate in consent solicitations or related processes. However, once an item comes to a shareholder vote, we uphold our fiduciary duty to vote in the best long-term interests of our clients, where we are authorized to do so.

Simple majority voting

We generally favor a simple majority voting requirement to pass proposals. Therefore, we will generally support the reduction or the elimination of supermajority voting requirements to the extent that we determine shareholders’ ability to protect their economic interests is improved. Nonetheless, in situations where there is a substantial or dominant shareholder, supermajority voting may be protective of minority shareholder interests, and we may support supermajority requirements in those situations.

Virtual meetings

Shareholders should have the opportunity to participate in the annual and special meetings for the companies in which they are invested, as these meetings are an opportunity for shareholders to provide feedback and hear from the board and management. While these meetings have traditionally been conducted in-person, virtual meetings are an increasingly viable way for companies to utilize technology to facilitate shareholder accessibility, inclusiveness, and cost efficiencies. Shareholders should have a meaningful opportunity to participate in the meeting and interact with the board and management in these virtual settings; companies should facilitate open dialogue and allow shareholders to voice concerns and provide feedback without undue censorship. Relevant shareholder proposals are assessed on a case-by-case basis.

Want to know more?

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This document is provided for information and educational purposes only. Investing involves risk, including the loss of principal.

MACQUARIE ASSET MANAGEMENT PUBLIC INVESTMENTS

Global Proxy Voting Policies and Procedures
February 2024

Introduction

Macquarie Asset Management (“MAM”) is the asset management division of Macquarie Group. MAM is an integrated asset manager across public and private markets offering a diverse range of capabilities, including real assets, real estate, credit, equities and multi-asset solutions. These Proxy Voting Policies and Procedures (the “Procedures”) are utilized by the following companies1 within MAM:

1 The list of companies noted within these Procedures does not include every asset management entity within the MAM organization. For inquiries regarding the proxy voting policies of MAM companies not included above, please contact such MAM entity or your MAM representative for more details.

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Macquarie Investment Management Business Trust (“MIMBT”): MIMBT is a registered investment adviser with the U.S. Securities and Exchange Commission (“SEC”) pursuant to the Investment Advisers Act of 1940, as amended, (the “Advisers Act”). MIMBT is headquartered in Philadelphia, PA, USA and consists of the following series of entities: Delaware Management Company, Macquarie Investment Management Advisers, Delaware Capital Management, Delaware Investments Fund Advisers, Macquarie Asset Advisers, Macquarie Alternative Strategies, Macquarie Private Fund Advisers and CPG Fund Advisers.

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Macquarie Investment Management Global Limited (“MIMGL”): MIMGL holds an Australian financial services licence and is also a registered investment adviser with the SEC pursuant to the Advisers Act. MIMGL is headquartered in Sydney, Australia.

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Macquarie Investment Management Europe S.A. (“MIME S.A.”): MIME S.A. is authorized and regulated by the Commission de Surveillance du Secteur Financier (“CSSF”) in the Grand Duchy of Luxembourg. MIME S.A. has an application pending to become a registered investment adviser with the SEC pursuant to the Advisers Act. MIME S.A. is headquartered in Luxembourg.

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Macquarie Investment Management Austria Kapitalanlage AG (“MIMAK”): MIMAK is authorized and regulated by the Financial Markets Authority (“FMA”) in Austria and is also a registered investment adviser with the SEC pursuant to the Advisers Act. MIMAK is headquartered in Vienna, Austria.

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Macquarie Investment Management Europe Limited (“MIMEL”): MIMEL is authorized and regulated by the Financial Conduct Authority (“FCA”) in the United Kingdom. MIMEL is also a registered investment adviser with the SEC pursuant to the Advisers Act. MIMEL is headquartered in London, England.

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MIMBT and its series, MIMGL, MIME S.A., MIMAK, and MIMEL are referred to herein as MAM.

These Procedures apply to MAM’s public markets business. MAM provides investment advisory and portfolio management services to various types of clients such as registered and unregistered commingled funds, defined benefit plans, defined contribution plans, private and public pension funds, foundations, endowment funds and other types of institutional investors. Pursuant to the terms of an investment management agreement between MAM and its client or as a result of some other type of specific delegation by the client, MAM is often given the authority and discretion to exercise the securityholder’s right to vote on company and shareholder resolutions (referred to herein as “proxy” or “proxies”) relating to the underlying securities held in such client portfolios managed by MAM. Also, clients sometimes ask MAM to give voting advice on certain proxies without delegating full responsibility to MAM to vote proxies on behalf of the client. Clients also have the option to retain the responsibility to vote proxies for their portfolio securities and occasionally clients will ask MAM to vote proxies pursuant to a client’s proxy voting policy. In cases where MAM has been delegated the responsibility to vote or provide advice on proxies, MAM has developed the following Procedures in order to ensure that MAM votes proxies or gives proxy voting advice that MAM believe is in the best interests of its clients. Typically, the investment management agreement between MAM and a client will fully and fairly disclose the terms of MAM’s role in proxy voting and such agreement will demonstrate the client’s informed consent on such proxy voting authority.

Procedures for Voting Proxies

MAM has established a Proxy Voting Committee (the “Committee”) that is responsible for overseeing MAM’s proxy voting process. The Committee consists of the following persons in MAM: (i) at least five portfolio management representatives; (ii) one representative from Fund Administration; (iii) one representative from Data Operations; (iv) one representative from Compliance; and (v) one representative from the Legal Department. The person(s) representing each department on the Committee may change from time to time, but at least one member of the Committee will also be a member of MAM’s Global ESG Oversight Committee. The Committee will meet as necessary to help MAM fulfill its duties to vote proxies for clients, but in any event, will meet at least quarterly to discuss various proxy voting issues. The Committee may meet in person, by video conference, and/or telephonically and may also conduct business via email or by other electronic communication.

One of the main responsibilities of the Committee is to review and approve the Procedures on a yearly basis or as otherwise necessary. When reviewing the Procedures, the Committee looks to see if the Procedures are designed to allow MAM to vote proxies in a manner consistent with the goals of voting in the best interests of clients and maximizing the value of the underlying shares being voted on by MAM. The Committee will also review the Procedures to make sure that they comply with any new rules promulgated by the SEC, the Australian Securities & Investments Commission (“ASIC”), the CSSF, the FMA, the FCA, the European Securities and Markets Authority (“ESMA”), or other relevant regulatory bodies. After the Procedures are approved by the Committee, MAM will vote proxies or give

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advice on voting proxies generally in accordance with such Procedures and MAM’s Proxy Voting Guidelines (the “Guidelines”). The Guidelines are also reviewed and approved on a yearly basis or as otherwise necessary.

In order to facilitate the actual process of voting proxies, MAM retains the following proxy advisory firms (as of the date of these Procedures) for various services: Institutional Shareholder Services (“ISS”); Glass Lewis & Co., including its Australian subsidiary CGI Glass Lewis (together, “Glass Lewis”); and Ownership Matters (“OM”). ISS, Glass Lewis, OM, and any other proxy advisory firms utilized by MAM are collectively referred to as “Proxy Advisor” within these Procedures. Also, certain clients may request that MAM utilize the client’s preferred proxy advisory firm from time to time and as agreed to by the parties.

The Proxy Advisor and/or the client’s custodian monitor corporate events in connection with MAM’s client accounts. After receiving the proxy statements, Proxy Advisor will review the proxy issues and recommend a vote in accordance with MAM’s Guidelines. When the Guidelines state that a proxy issue will be decided on a case-by-case basis, Proxy Advisor’s custom research team will look at the relevant facts and circumstances and research the issue to provide MAM with a recommendation as to how the proxy should be voted in accordance with the parameters described in the Guidelines. If the Guidelines do not address a particular proxy issue, Proxy Advisor will similarly look at the relevant facts and circumstances and research the issue to provide a recommendation as to how the proxy should be voted. In limited cases where Proxy Advisor is unable to provide research and a proxy vote recommendation for a portfolio company, MAM will be solely responsible for researching the proxy and voting the proxy.

Proxy Advisor’s proxy voting research recommendations are made available to the applicable portfolio management teams within MAM to review and evaluate prior to the corresponding shareholder meeting. As described further below in the “Proxy Voting Guidelines” section, there will be times when a MAM portfolio management team believes that the best interests of the client will be better served if MAM votes a proxy counter to Proxy Advisor’s research recommendation under the Guidelines. In these cases, the portfolio management team will document the rationale for their votes and provide such rationale to the Committee or the Committee’s delegates for its records. The Committee and its delegates are responsible for reviewing the rationale for these votes to assure that it provides a reasonable basis for any vote.

After a proxy has been voted, Proxy Advisor will create a record of the vote in order to help MAM comply with its duties listed under “Availability of Proxy Voting Information and Recordkeeping” below. If a client provides MAM with its own instruction on a given proxy vote for their portfolio, MAM will forward the client’s instruction to Proxy Advisor who will vote the client’s proxy pursuant to the client’s instruction.

MAM will attempt to vote every proxy which they or their agents receive when a client has given MAM the authority and direction to vote such proxies. However, there are situations in which MAM may not be able to process a proxy or the cost of processing such proxies would be high and/or exceed the expected benefits to the client. Examples of such situations include, but are not limited to: MAM may not have sufficient time to process a vote because MAM or its agents received a proxy statement in an untimely manner; MAM generally retains voting rights in respect of securities lent or pledged as collateral but may in certain situations be unable to vote a proxy, for example in relation to a security that is on loan pursuant to a securities lending program; or casting a vote on a security could involve additional costs such as hiring a translator or hiring an agent or traveling to the site of the shareholder meeting to vote the proxy in person. Use of a Proxy Advisor and relationships with multiple custodians can help to mitigate a situation where MAM is unable to vote a proxy.

Company Management Recommendations

When conducting a fundamental analysis to determine whether to invest in a particular company, one of the factors MAM may consider is the quality and depth of the company’s management. As a result, MAM generally believes that recommendations of management on any issue (particularly routine issues) should be given a fair amount of weight in determining how proxy issues should be voted. Thus, on many issues, MAM’s votes are cast in accordance with the recommendations of the company’s management. However, MAM may vote against management’s position when it runs counter to the Guidelines, and MAM will also vote against management’s recommendation when MAM believes such position is not in the best interests of MAM’s clients.

MAM portfolio management teams retain the ability to discuss upcoming proxy votes with company management. In those instances where MAM votes against management’s recommendation and the proxy result is contrary to MAM’s

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vote, the portfolio management team that manages the security may escalate the matter. Each portfolio management team is responsible for determining whether there is a need to escalate based on the facts and circumstances of the proxy vote. Options available to the portfolio management team may include: directly contacting the company’s senior management; utilizing MAM’s Sustainability Team to engage with the company on the team’s behalf; and/or reducing the team’s holdings in the company or divesting from the position in its entirety.

Conflicts of Interest

As a matter of policy, the Committee and any other officers, directors, employees and affiliated persons of MAM may not be influenced by outside sources who have interests which conflict with the interests of MAM’s clients when voting proxies for such clients. However, in order to ensure that MAM votes proxies in the best interests of the client, MAM has established various systems described below to properly deal with a material conflict of interest.

Most of the proxies which MAM receives on behalf of its clients are voted in accordance with the Guidelines. As stated above, these Procedures (including the Guidelines) are reviewed and approved by the Committee annually and at other necessary times. The custom Guidelines are then utilized by Proxy Advisor going forward to provide recommendations on how to vote client proxies. The Committee approves the Guidelines only after it has determined that the Guidelines are designed to help MAM vote proxies in a manner consistent with the goal of voting in the best interests of its clients. Since the Guidelines are pre-determined by the Committee, application of the Guidelines by MAM’s portfolio management teams when voting proxies after reviewing the proxy and research provided by Proxy Advisor should in most instances adequately address any potential conflicts of interest. If MAM becomes aware of a conflict of interest in an upcoming proxy vote, the proxy vote will generally be referred to the Committee or the Committee’s delegates for review. If the portfolio management team for such proxy intends to vote in accordance with Proxy Advisor’s recommendation pursuant to our Guidelines, then no further action is needed to be taken by the Committee. If the MAM portfolio management team is considering voting a proxy contrary to Proxy Advisor’s research recommendation under the Guidelines, the Committee or its delegates will assess the proposed vote to determine if it is reasonable. The Committee or its delegates will also assess whether any business or other material relationships between MAM and a portfolio company (unrelated to the ownership of the portfolio company’s securities) could have influenced an inconsistent vote on that company’s proxy. If the Committee or its delegates determines that the proposed proxy vote is unreasonable or unduly influenced by a conflict, the portfolio management team will be required to vote the proxy in accordance with Proxy Advisor’s research recommendation or abstain from voting. Except as permitted by law, MAM will not vote in relation to related party securities on proposals in which MAM has an interest other than as an investor. Generally, MAM will abstain from voting on proposals related to Macquarie Group Limited (“MGL”) or on entities controlled by MGL.

In connection with its advisory business, MAM may also act as an investment adviser to a “fund of funds” in which a fund (“MAM Fund”) may invest in underlying funds affiliated with MAM (“Underlying Affiliated Fund”) as part of its investment strategy. If an Underlying Affiliated Fund has a shareholder meeting, MAM will typically seek to vote the MAM Fund’s interests in the Underlying Affiliated Fund in the same proportion as the proxy votes cast by all of the other shareholders of the Underlying Affiliated Fund. This is known as “echo voting” and is designed to avoid potential conflicts of interest.

Oversight of Proxy Advisory Firm

The Committee and appropriate MAM personnel are responsible for overseeing Proxy Advisor’s proxy voting activities for MAM’s clients. MAM will conduct periodic due diligence of Proxy Advisor that will include: (i) Proxy Advisor’s conflict of interest procedures and any other pertinent procedures or representations from Proxy Advisor in an attempt to ensure that Proxy Advisor will make research recommendations for voting proxies in an impartial manner and in the best interests of MAM’s clients; (ii) the adequacy and quality of Proxy Advisor’s staffing, personnel, and technology; (iii) the methodologies, guidelines, sources and factors underlying Proxy Advisor’s voting recommendations; (iv) whether Proxy Advisor has an effective process for seeking timely input from issuers, its clients and other third parties and how that input is incorporated into Proxy Advisor’s methodologies, guidelines and proxy voting recommendations; (v) how Proxy Advisor ensures that it has complete, accurate and up-to-date information about each proxy voting matter and updates its research accordingly; (vi) reviewing whether Proxy Advisor has undergone any recent, material organizational or business changes; and (vii) a review of Proxy Advisor’s general compliance with the terms of its agreement with MAM.

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Availability of Proxy Voting Information and Recordkeeping

Clients of MAM will be directed to their client service representative to obtain information from MAM on how their securities were voted. At the beginning of a new relationship with a client, MAM will typically provide clients with a concise summary of MAM’s proxy voting process and will inform clients that they can obtain a copy of the complete Procedures upon request. Existing clients will also be provided with the above information as agreed with the client.

Where required by applicable law, MAM will also retain records regarding proxy voting on behalf of clients. MAM will typically keep records of the following items: (i) the Procedures; (ii) proxy statements received regarding client securities (via hard copies held by Proxy Advisor or electronic filings from the company’s respective regulatory filing system); (iii) records of votes cast on behalf of MAM’s clients (via Proxy Advisor); (iv) records of a client’s written request for information on how MAM voted proxies for the client, and any MAM written response to an oral or written client request for information on how MAM voted proxies for the client; and (v) any documents prepared by MAM that were material to making a decision as to how to vote or that memorialized the basis for that decision.

Proxy Voting Guidelines

The Proxy Voting Guidelines summarize MAM’s positions on various issues and give a general indication as to how MAM will vote proxies on each issue. The Proxy Voting Committee has reviewed the Guidelines and determined that voting proxies pursuant to the Guidelines should be in the best interests of the client and should align with the goal of maximizing the value of the client’s investments.

For certain clients, MAM may also need to take into account additional factors outside of the Guidelines that will influence how MAM analyzes and votes proxies. For example, proxy votes made by MAM for a client with specialized investment objectives and strategies may take into account additional research and factors that may lead a portfolio management team to vote a proxy in a different manner. In these situations, MAM may also develop one-off proxy voting guidelines for such client. In addition, the location of a portfolio company may also necessitate MAM having to review additional research and factors in order to account for local laws and standards when voting proxies.

Moreover, the list of Guidelines may not include all potential voting issues. To the extent that the Guidelines do not cover potential voting issues, MAM will vote on such issues in a manner that MAM believes promotes the best interests of the client.

Although MAM will usually vote proxies in accordance with these Guidelines, each MAM portfolio management team reserves the right to vote certain issues counter to the Guidelines if, after a review of the matter, the team believes that a client’s best interests would be served by such a vote. In all cases, the MAM portfolio management team responsible for voting proxies on behalf of a client will have the final decision on how to vote proxies, subject to these Procedures.

To the extent that management of a portfolio company or another company shareholder would like to engage with MAM on a particular proxy statement, the company or shareholder should reach out to the MAM portfolio management team who holds the applicable company security on behalf of its clients. MAM will consider any additional information provided by the company or shareholder regarding an upcoming proxy and analyze such information along with prior research provided by Proxy Advisor before coming to a decision on how to vote an applicable proxy.

Dodge & Cox

PROXY VOTING POLICIES AND PROCEDURES

Revised March 7, 2024

The following Proxy Voting Policies and Procedures (“Policies and Procedures”) have been adopted by Dodge & Cox, a California corporation (“Dodge & Cox”), an investment adviser registered with the U.S. Securities and Exchange Commission (“SEC”) under the Investment Advisers Act of 1940, as amended (“Advisers Act”). Dodge & Cox’s clients include Dodge & Cox Funds (the “Trust”), an investment company registered with the SEC under the Investment Company Act of 1940, as amended (“1940 Act”), consisting of seven series (Dodge & Cox Stock Fund, Dodge & Cox Global Stock Fund, Dodge & Cox International Stock Fund, Dodge & Cox Balanced Fund, Dodge & Cox Income Fund, Dodge & Cox Global Bond Fund, and Dodge & Cox Emerging Markets Stock Fund collectively, the “Funds”), Dodge & Cox Worldwide Funds plc, a UCITS umbrella fund registered in Ireland and consisting of four sub-funds (Dodge & Cox Worldwide Funds plc – Global Stock Fund, Dodge & Cox Worldwide Funds plc – U.S. Stock Fund, Dodge & Cox

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Worldwide Funds plc – Global Bond Fund, and Dodge & Cox Worldwide Funds plc – Emerging Markets Stock Fund), as well as individuals, corporations and pension plans subject to the Employee Retirement Income Security Act of 1974 (“ERISA”).

These Policies and Procedures are adopted to ensure compliance by Dodge & Cox with Rule 206(4)-6 under the Advisers Act, Rule 30b1-4 and Form N-1A under the 1940 Act, and other applicable fiduciary obligations under rules and regulations of the SEC and interpretations of its staff. Dodge & Cox follows these Policies and Procedures for each of its clients as required under the Advisers Act and other applicable laws, unless expressly directed by a client in writing to refrain from voting that client’s proxies (or as otherwise agreed with Dodge & Cox). To the extent issues are not covered by the Policies and Procedures, Dodge & Cox will vote proxies in its absolute discretion after taking into consideration the best interests of its clients (i.e., the common interest that all clients share in seeing the value of a common investment increase over time. Clients may have differing political or social interests, but their best economic interest is generally uniform.).

GENERAL POLICY

Dodge & Cox maintains a policy of voting proxies in a way which, in Dodge & Cox’s opinion, best serves the interest of its clients in their capacity as shareholders of a company. Dodge & Cox believes that this is consistent with SEC and U.S. Department of Labor guidelines, which state that an investment manager’s primary responsibility as a fiduciary is to vote in the best interest of its clients. As an investment manager, Dodge & Cox is primarily concerned with maximizing the value of its clients’ investment portfolios. Dodge & Cox typically votes in support of company management, but votes against proposals that Dodge & Cox believes would negatively impact the long-term value of its clients’ shares of a company.

When we evaluate how to vote proxies, we consider many factors, including financially material environmental, social, and governance (ESG) factors. We view ESG factors as financially material when they are likely to affect the long term value of a company. Financially material ESG factors can differ for each company. In our analysis, we seek to understand how a company makes decisions, balances the interests of its stakeholders, and manages key risks. In doing so, we pay particular attention to governance structure and practices, as well as risks and opportunities associated with environmental and social factors, when applicable. In general, we believe governance factors have the potential to be financially material for every company, whereas financial materiality for environmental and social factors can vary by company, industry, and region.

In those instances in which Dodge & Cox has been given full discretion with regard to proxies, Dodge & Cox votes based on the principle of maximizing shareholder value, as described above.

PROXY DECISION-MAKING PROCESS

All proxies are reviewed by Dodge & Cox’s designated Proxy Officer or delegate. Proxies are also reviewed by a Global Industry Analyst when deemed appropriate by the Proxy Officer or delegate. A delegate may include a third party vendor hired to implement the Dodge & Cox Proxy Voting Policy. The Proxy Officer or delegate votes the proxies according to these guidelines and consults the Proxy Policy Committee (which generally consists of the Proxy Officer, Global Industry Analysts, a subset of the firm’s investment committees, and members of the Legal and Compliance Departments) when necessary. When an issue is not clearly covered by these guidelines, and when deemed appropriate by the Proxy Officer or delegate, the proposal may be referred to one or more members of the Proxy Policy Committee for review, who then decide on an appropriate vote or may recommend further review by the relevant investment committee.

Dodge & Cox has retained the services of an outside proxy administrator to administer proxy voting and reporting for Dodge & Cox’s clients. Dodge & Cox votes each proxy while the proxy administrator ensures that the decisions are implemented for each client. Additionally, Dodge & Cox has retained the services of two outside proxy research firms to provide Dodge & Cox with research relating to proxy issues and to make proxy voting recommendations. The Proxy Officer or delegate is responsible for: (i) voting the proxies of clients subject to these Policies and Procedures; (ii) overseeing the outside proxy administrator; (iii) implementing these Policies and Procedures; (iv) consulting with Global Industry Analysts when deemed appropriate for the relevant portfolio security (and the Proxy Policy Committee if necessary); and (v) maintaining proxy voting records.

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LIMITATIONS RELATING TO PROXY VOTING

While Dodge & Cox uses reasonable efforts to vote proxies, in certain circumstances it may be impractical or impossible to do so. For example, when a client has loaned securities to a third party, such securities are not readily available for proxy voting and Dodge & Cox will not recall those securities to vote them absent exceptional circumstances. Securities lending programs may also prevent voting for clients who have lent securities in certain markets where split voting (different vote recommendations for one meeting for the same beneficial owner) is not allowed. Dodge & Cox may also be prohibited from voting certain shares or may be required to vote certain shares in proportion to other shareholders under applicable state, federal, or non-U.S. regulatory requirements, company governance provisions, or for other reasons.

Corporate governance standards, disclosure requirements, and voting mechanics vary greatly among non-U.S. markets in which the Dodge & Cox invests on behalf of its clients. Dodge & Cox will cast votes in a manner believed to be consistent with these Policies and Procedures, while taking into account differing practices by market. Some non-U.S. markets require that securities be “blocked” or registered to vote at a company’s meeting. Absent an issue of compelling importance, Dodge & Cox will generally not subject the Dodge & Cox clients to the loss of liquidity imposed by these requirements. Additionally, Dodge & Cox may not be able to vote proxies in connection with certain holdings of non-U.S. securities if Dodge & Cox does not receive information about the meeting in time to vote the proxies or does not meet the requirements necessary to vote the securities. The costs of voting (e.g., custodian fees, vote agency fees, information gathering) in non-U.S. markets may be substantially higher than for U.S. holdings. As such, Dodge & Cox may limit its voting of non-U.S. holdings in instances where the issues presented are unlikely to have a material impact on shareholder value.

PROXY VOTING GUIDELINES

PLEASE NOTE: The examples below are provided to give a general indication as to how Dodge & Cox will vote proxies on certain issues. These examples do not address all potential voting issues or the intricacies that may surround individual proxy votes, and actual proxy votes may differ from the guidelines presented here. Dodge & Cox will typically vote against proposals that do not include enough information to allow a reasonable evaluation of the proposal’s merits. Governance practices and market standards not outlined below may be taken into consideration as well. It is also important to note that the proxy voting policies described herein may at times be inconsistent with our investment decisions.

I. Routine Business

Dodge & Cox considers the reputation, experience, and competence of a company's management and board when it researches and evaluates the merits of investing in a particular security. Dodge & Cox will typically vote in accordance with management on the items below and other routine issues when adequate information on the proposal is provided. When in the view of Dodge & Cox, adequate information is not provided, Dodge & Cox will generally choose to abstain or vote against such proposals. Dodge & Cox will typically vote against shareholder proposals that require a company to pay a dividend, as the decision to return excess cash is best made by a company’s management.

A. Approval of Auditors (unless a change is not satisfactorily explained) and Compensation in Line with Prevailing Practice.

B. Change Date and Place of Annual Meeting (if not associated with a takeover).

C. Change in Company Name.

D. Approval of Financial Statements.

E. Payment or Distribution of Dividends.

F. Other Business (domestic companies).

G. Other Business (non-U.S. companies).

Dodge & Cox will typically vote against other business proposals in non-U.S. markets, as it is usually difficult to determine whether the items raised under other business would be beneficial to shareholders.

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H. Amend Bylaws / Articles of Association to Bring in Line with Changes in Local Laws & Regulations.

Dodge & Cox will generally support the amending of an issuer’s bylaws / articles of association to bring them in line with local laws and regulations, however, Dodge & Cox will vote against proposals that Dodge & Cox believes would negatively impact the long-term value of its clients’ shares of a company.

I. Related Party Transactions.

Dodge & Cox will review related party transactions on a case-by-case basis.

II. Capitalization / Reorganization

A. Issuance of Securities to Meet Ongoing Corporate Needs.

B. Approve Stock Split.

C. Share Repurchase Authorization.

D. Cancel Treasury Shares (in connection with a Share Repurchase Program).

E. Issuance of Blank Check Preferred.

Dodge & Cox supports management’s ability to raise capital to meet ongoing business needs. However, the ability to issue large blocks of securities for any purpose without shareholder approval can be detrimental to shareholder value. A company can issue and place large blocks of stock in "friendly" hands to thwart or deter an unwanted takeover. Dodge & Cox typically supports provisions where a company expressly states that the securities would not be used as a takeover defense or carry special voting rights.

F. Reincorporation.

Dodge & Cox generally supports management's decision to reincorporate in another location for reasons other than to prevent takeover attempts.

III. Compensation

A. Compensation, Stock Option, Employee Stock Purchase Plans, and Savings Plans that are Generally in Line with Prevailing Practice.

Dodge & Cox typically supports measures that enable companies to attract and retain key employees and directors. Dodge & Cox reviews each compensation plan to evaluate whether the plan overly dilutes shareholder value. Dodge & Cox uses two independent proxy research firms that provide research on proxy issues as a source to help determine the dilutive effects of each plan. Dodge & Cox favors plans that reward long-term performance and align management and shareholders’ interests.

B. Golden Parachutes / Severance Agreements.

Provisions for “golden parachutes” and severance agreements are evaluated on a case-by-case basis using internal standards. Dodge & Cox generally supports golden parachutes when it believes that they will enable the company to attract and retain key executives. Dodge & Cox will generally vote against severance agreements that provide excessive payouts or provisions such as excise tax gross-ups or the accelerated vesting of equity awards upon a broad definition of “change-in-control” (e.g., “single-trigger”).

C. Claw-Back of Incentive Compensation.

Dodge & Cox typically votes against shareholder claw-back proposals where the company has an existing claw-back policy. Proposals will be reviewed on a case-by-case basis where the company has not previously adopted a claw-back

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policy. In evaluating claw-back shareholder proposals, Dodge & Cox will consider whether the company has a history of financial restatements, material financial problems, and any other factors deemed relevant.

D. Advisory Votes on Compensation.

Dodge & Cox typically supports management’s discretion to set compensation for executive officers and will generally vote in favor of the compensation practices of the companies in which it invests so long as Dodge & Cox believes that the plans align management and shareholders’ interests. Dodge & Cox may vote against compensation practices of companies where those practices are believed to cause a material misalignment of pay and performance. Dodge & Cox prefers clear key performance indicators (KPI’s) with limited discretion included in compensation targets and expects elements of a company’s compensation program to be disclosed in a transparent and timely manner. When deemed material, Dodge & Cox may support the inclusion of ESG factors in compensation plans.

E. Frequency of Advisory Votes on Compensation.

Dodge & Cox will typically vote to have the advisory vote on compensation appear on a company’s proxy annually.

F. Limit Services of Compensation Consultant.

Dodge & Cox will typically vote against shareholder proposals that seek to limit the services of compensation consultants to strictly performing compensation-related consulting. Such a proposal limits the issuer’s ability to retain consulting services that it believes would be necessary or beneficial to the firm.

IV. Governance Related

A. Election of Directors in Uncontested Elections.

Dodge & Cox considers the reputation, experience, and competence of a company’s management and board when it researches and evaluates the merits of investing in a particular security. Dodge & Cox typically votes in accordance with management’s recommendation in uncontested elections of directors. However, Dodge & Cox will typically vote against the election of a director if insufficient information is provided on the proposed director, and may consider voting against a proposed director if Dodge & Cox has other governance concerns such as corruption or risk oversight failure. Dodge & Cox also expects directors to attend at least 75% of scheduled board and applicable committee meetings and will typically vote against their re-election if they fail to meet these thresholds of meeting attendance absent extenuating circumstances.

B. Election of Directors in Contested Elections

When evaluating the director nominees in a contested election, Dodge & Cox takes a case-by-case approach, taking into account, among other things, the qualifications of director nominees and the long-term financial performance of the company.

C. Indemnification and Exculpation of Officers and Directors in Line with Prevailing Practice.

When reviewing U.S. indemnification and exculpation proposals, Dodge & Cox will consider prevailing practice. When reviewing non-U.S. indemnification and exculpation proposals, Dodge & Cox will consider using Delaware law as a benchmark for evaluating appropriate levels of indemnification and exculpation for officers and directors.

D. Board Structure.

There is no optimal size or composition of inside and outside directors that fits every company. Dodge & Cox considers the composition, reputation, and experience of a company’s board in the process of reviewing the merits of investing in a particular company’s shares. Dodge & Cox prefers that the number of directors cannot be altered without shareholder approval; allowing management to increase or decrease the size of the board can be used as an anti-takeover defense. Dodge & Cox also prefers that companies have a majority of independent directors as defined by the rules of the exchange where the company is listed, and for companies to have compensation, audit and nominating committees composed entirely of independent directors. Dodge & Cox may vote against a director who is not independent and sits as a member of the compensation, audit, or nominating committee. Dodge & Cox will also take into consideration local market standards of governance best practices when voting on director nominees. Dodge & Cox will typically vote in

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favor of the establishment of a nominating committee for the board of directors and other board committees we believe will improve governance.

E. Independent Chairman (Separate Chairman / Chief Executive Officer).

Dodge & Cox considers the reputation, experience, and competence of a company’s management and board when it researches and evaluates the merits of investing in a particular security. Directors and management of companies are generally in the best position to determine an efficient, functional structure for the board of directors and splitting the positions of Chairman and Chief Executive Officer may not be in the best interests of the company or its shareholders. When the positions of Chairman and Chief Executive Officer are combined, Dodge & Cox prefers that the company has a lead independent director. Dodge & Cox typically will vote in accordance with company management on the above issue.

F. Directors’ Term in Office / Length of Service / Mandatory Retirement Age.

Dodge & Cox will typically support the board’s discretion to set board tenure and limits. Dodge & Cox believes that shareholder imposed restrictions on a director’s tenure, such as a mandatory retirement age or length of service limits, could harm shareholder interests by forcing experienced and knowledgeable directors off the board and will generally vote against any such restrictions.

G. Succession Plans.

Dodge & Cox will generally support non-binding shareholder proposals that encourage companies to adopt a succession plan for senior management, if the company does not currently have a succession plan in place.

H. Shareholders’ Ability to Remove and Approve Directors.

Dodge & Cox believes that fair and democratic access to the board is an important factor in increasing the accountability of the board of directors to shareholders. Thus, Dodge & Cox would generally support proposals whereby nominations of directors by a shareholder would be included in the proxy statement and ballot. Dodge & Cox would vote against proposals restricting the shareholders’ ability to remove a director, as it could serve to entrench management. Dodge & Cox does not support proposals giving continuing directors the right to fill vacant board seats without shareholder approval.

I. Majority of Votes to Elect Directors.

Dodge & Cox will generally support shareholder proposals to require a majority vote standard for the election of directors provided it does not conflict with the law where the company is incorporated. When there are no members of the nomination and governance committee up for election, Dodge & Cox may choose to vote against the most tenured board member up for re-election.

J. Classified Boards / Annual Elections.

Dodge & Cox does not support classified boards because this makes a change in board control more difficult to effect, and hence may reduce the accountability of the board to shareholders. We support proposals that enable annual director elections and proposals to declassify a board. Dodge & Cox may vote against directors of a board’s nomination and governance committee where a classified board is in place without proper sunset provisions or structure rationale.

K. Cumulative Voting.

Dodge & Cox will typically vote against proposals to establish cumulative voting, as cumulative voting does not align voting interest with economic interest in a company. Nevertheless, Dodge & Cox may utilize cumulative voting where this practice is already in place. Where the practice of cumulative voting is already in place, Dodge & Cox may distribute its support among directors based on criteria disclosed within this Proxy Voting Policy.

L. Directors and Named Executive Officers (NEOs) Required to Own Specified Amount of Company Stock.

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Dodge & Cox typically does not support proposals requiring directors to own a specific amount of a company’s shares, as it could prove onerous to qualified individuals who could otherwise contribute significantly to the company. Nevertheless, Dodge & Cox does believe that director and NEO stock ownership can align their interests with those of shareholders.

M. Include Shareholders’ Nominations of Directors in Proxy.

Dodge & Cox generally supports including shareholders’ nominations of directors in the proxy statement and ballot as it serves to increase the accountability of the Board to shareholders. Dodge & Cox will generally consider the proposed requirements for minimum length and percentage of ownership, as well as other governance provisions at the company, when determining how to vote on proxy access proposals. Dodge & Cox will generally support proxy access proposals that include an ownership level and holding period of at least three percent for three years. Dodge & Cox will evaluate proposals with lower ownership thresholds and / or shorter holding periods on a case-by-case basis. Dodge & Cox believes that fair and democratic access to the board is an important part of increasing accountability.

N. Retirement Benefits for Non-Employee Directors.

Dodge & Cox typically does not support shareholder proposals that seek to eliminate retirement benefits for non-employee directors. Dodge & Cox believes such proposals could hinder companies from attracting and retaining qualified board members.

O. Director Compensation.

Dodge & Cox typically does not support shareholder proposals that seek to pay directors partially or solely in stock. Dodge & Cox believes that the Compensation Committee or full board is best qualified to design compensation packages that will attract, motivate, and retain capable directors.

V. Anti-Takeover / Business Combinations

Generally, Dodge & Cox does not support provisions that Dodge & Cox believes negatively impact the value of the shares by deterring an unwanted tender or takeover offer. Toward that end, Dodge & Cox generally supports the right of shareholders to vote on issues pertaining to business combinations, restructurings, and changes in capitalization. Dodge & Cox does, however, support those policies that grant management time in which to respond to an unsolicited offer and that discourage two-tier offers.

A. Opt-Out of State Law Business Combination Provisions.

Dodge & Cox generally supports shareholder proposals to "opt-out" of certain state laws designed to deter unwanted takeovers. The corporation can continue to receive the many benefits of incorporation in a particular state, while the "opt-out" removes anti-takeover provisions that may detract from shareholder value.

B. Fair Price.

While Dodge & Cox would support a Fair Price provision concerned only with preventing two-tier offers, many Fair Price provisions also give the Board sole discretion in determining the "fair price" of its securities. This determination can be overridden only by a supermajority vote of the shareholders. Dodge & Cox believes that this is in conflict with Dodge & Cox’s policy of preserving shareholder value.

C. Shareholder Rights Proposals / Poison Pills.

Generally, Dodge & Cox supports management’s decision to implement shareholders rights programs so long as they are put to a shareholder ratification vote within 12 months of adoption or have a two to three year sunset provision, as they do not seem to deter or prevent takeovers, but instead provide the board time to pursue alternatives often resulting in better value for shareholders. Dodge & Cox may vote against a shareholder rights program if local law provides safeguards that allow a company to adequately assess a takeover offer. Dodge & Cox generally supports shareholder proposals requesting that the company submit existing or future shareholders rights programs to a shareholder vote (although it may vote against a proposal when a company has adopted a meaningful alternative to the shareholder

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proposal). When considering proposals to ratify shareholder rights programs, Dodge & Cox will generally consider the following criteria, among other factors:

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20% trigger or higher “flip-in” or “flip-over”;

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Two- to three-year sunset provision;

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No “dead-hand”, “slow-hand”, “no-hand” or similar features that limit the ability of a future board to redeem the pill;

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Shareholder redemption feature - if the board refuses to redeem the pill 90 days after an offer is announced, ten percent of the shares may call a special meeting or seek a written consent to vote on rescinding the pill.

D. Greenmail.

Dodge & Cox does not support the payment of "greenmail," the situation in which a potential bidder is paid a premium as a condition of not pursuing a takeover of or restructuring of the company, since one shareholder profits at the expense of the others.

E. Mergers, Acquisitions, and Spin-offs.

Dodge & Cox considers each proposal concerning a merger, acquisition or spin-off on a case-by- case basis. Dodge & Cox will generally support these types of corporate restructurings where it believes that they would maximize long-term shareholder value. When Dodge & Cox is in favor of a merger, acquisition or spin-off, Dodge & Cox will typically support a proposal to adjourn the meeting when votes for a merger or acquisition are insufficient, as this gives management additional opportunities to present shareholders with information about its proposals.

F. Material Amendments to Bylaws.

Dodge & Cox expects shareholders to be given the opportunity to vote on all material bylaw amendments. We recognize that some bylaw amendments are non- material and it may be overly burdensome and not in the best interest of shareholders to require that these types of amendments be approved by shareholders. Dodge & Cox generally opposes proposals giving the board of directors exclusive authority to amend the bylaws of the company without seeking shareholder consent.

VI. Shareholder Rights

A. Confidential Voting.

Since there exists the possibility that certain shareholders may be subject to undue pressure to vote in favor of management, Dodge & Cox believes that the voting process is better served by confidentiality.

B. Right to Call Meetings.

Dodge & Cox generally supports proposals that give shareholders the ability to call special meetings and vote on issues outside of the company’s annual meeting. Limiting the forum in which shareholders are able to vote on proposals could adversely affect shareholder value. Dodge & Cox will generally support shareholder proposals that seek to allow stockholders owning 10 percent or more of the outstanding shares of the company’s common stock to call a special meeting and will consider proposals with thresholds lower than 10 percent on a case-by-case basis.

C. Shareholder Action by Written Consent.

Dodge & Cox typically supports the right of shareholders to take action by written consent because it facilitates broader corporate governance, but will generally consider the minimum consent threshold as well as other governance rights shareholders may have at the company when determining how to vote.

D. Supermajority.

Dodge & Cox does not support supermajority voting provisions with respect to corporate governance issues. By vesting a minority with veto power over shareholder decisions, a supermajority provision could deter tender offers and hence adversely affect shareholder value.

E. Omission of "Irrelevant" Proxy Issues.

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Dodge & Cox has made it a policy not to get involved in determining what is appropriate for a company to include or exclude in its proxy statements, as there are very specific rules laid out by the SEC governing this issue. Dodge & Cox considers the proxy process to be a very important part of corporate governance, and would consider any effort to limit this shareholder forum as an effort to reduce the accountability of management. Dodge & Cox defers to the SEC rules on this matter.

F. One Share, One Vote.

Dodge & Cox is generally opposed to dual-class capitalization structures that provide disparate voting rights to different groups of shareholders with similar economic investments. As such, all things equal, Dodge & Cox will generally oppose the creation of separate classes with different voting rights. However, for an existing dual class structure, Dodge & Cox may consider management’s record with respect to management, governance, and whether a reasonable sunset provision is in place and will review proposals to eliminate a dual class structure on a case-by-case basis.

G. Electronic Communications to Shareholders.

Dodge & Cox will typically support proposals that allow companies to provide electronic communications/notices to shareholders in lieu of paper notices, provided that the company complies with local laws for disseminating information to shareholders.

H. Hybrid and Virtual-Only Meetings.

Dodge & Cox will typically support proposals allowing for the convening of hybrid shareholder meetings (meaning those that include both an in-person and “virtual” meetings). Dodge & Cox is generally opposed to virtual only shareholder meetings. Virtual-only meetings may hinder meaningful exchanges between management and shareholders, enable management to avoid uncomfortable questions, and increase the likelihood of marginalizing certain shareholders. Dodge & Cox typically supports virtual-only meetings in situations where it may be unsafe for a large group to gather.

I. Exclusive Venue.

Dodge & Cox typically supports management’s discretion to select a specific jurisdiction as the exclusive venue for shareholder lawsuits.

VII. Social / Environmental

Dodge & Cox believes management is generally in the best position to make decisions regarding a company’s strategy and business operations, including those relating to financially material environmental and social factors. We view environmental and social factors as financially material when they are likely to affect the long-term value of a company. To the extent not addressed, elsewhere in these Policies and Procedures, Dodge & Cox will review management and shareholder proposals regarding social and environmental issues on a case-by-case basis and will consider supporting proposals that address financially material issues that it believes will protect and/or enhance the long-term value of the company. Financially material ESG factors can differ for each company. In general, we believe governance factors have the potential to be financially material for every company, whereas financial materiality for environmental and social factors can vary by company, industry, and region.

To read more about Dodge & Cox’s approach to environmental, social and governance (“ESG”) integration, please see Dodge & Cox’s ESG Policy.

A. Oversight of ESG.

As stewards of our clients’ capital, our job is to assess how the companies we invest in, manage their businesses. Dodge & Cox recognizes that societal and regulatory expectations around how companies manage ESG risks continue to evolve. Therefore, Dodge & Cox expects management and the board to regularly evaluate ESG risks and opportunities to identify those that could have a financially material impact on their business. When an ESG factor has been identified as financially material, by the company, we expect clear reporting and oversight function by management and the board.

B. Disclosure of Material Metrics.

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Dodge & Cox expects companies to disclose financially material ESG risks and opportunities. Dodge & Cox may consider supporting shareholder proposals requesting information or data that enables us to better assess the financial materiality of ESG risks to the company relating to social and environmental issues, such as climate change, energy transition, and human capital. When reviewing shareholder proposals requesting additional ESG disclosure, Dodge & Cox will typically vote against proposals that we deem overly prescriptive. Additionally, Dodge & Cox will review current company disclosures to determine whether the shareholder proposal is additive or unnecessary.

C. Climate Change and Energy Transition.

Dodge & Cox recognizes that many companies will face increasing risks related to climate change and the transition to a lower carbon economy (“the energy transition”) in the coming decades, in particular for companies that emit high levels of greenhouse gases. These risks may include transition risks, such as risks related to policy and legal changes, technology substitutions, changing consumer preferences, and reputational implications, as well as physical risks, such as sea level rise, wildfires, and more extreme weather events. As with any transition, there will also be opportunities for companies, such as the development of new technology. When Dodge & Cox deems that a company has financially material climate-related risks or opportunities, we will expect that company to have a climate strategy and will typically vote in favor of well-developed and meaningful management climate-related proposals.

Dodge & Cox may consider voting in favor of climate-related shareholder proposals that focus on disclosure of data and information. We will typically vote against shareholder climate-related proposals that dictate a company’s strategy rather than leaving the strategy up to management and the board. Dodge & Cox may take sector, location, and company strategy into consideration when deciding on how to vote on these types of shareholder proposals.

D. Diversity, Equity, and Inclusion (DEI).

Dodge & Cox recognizes that diversity, equity, and inclusiveness in the workplace can contribute to a company’s long-term value. When evaluating a company’s board, management team, and workforce, we may look at diversity of background, relevant experience, and personal characteristics. As such, Dodge & Cox may consider supporting shareholder proposals that request information and data on DEI metrics such as Equal Employment Opportunity (EEO-1) reports, disclosure of board skills, and disclosure of board diversity. We believe management is in the best position to determine board and company composition and will typically vote against shareholder proposals that mandate specific board and employee characteristics.

VIII. Mutual Fund Proxies

A. Election of Trustees / Directors.

Dodge & Cox will typically vote in support of proposed nominees in uncontested elections.

B. Investment Advisory Agreement.

Dodge & Cox votes on investment advisory agreements on a case-by-case basis.

C. Fundamental Investment Restrictions.

Dodge & Cox votes on amendments to a fund’s fundamental investment restrictions on a case-by- case basis.

D. Distribution Agreements.

Dodge & Cox votes on distribution agreements on a case-by-case basis.

CONFLICTS OF INTEREST

Dodge & Cox is sensitive to conflicts of interest that may arise in the proxy decision-making process. For example, conflicts of interest may arise when: (i) proxy votes regarding non-routine matters are solicited by an issuer who has an institutional separate account relationship with Dodge & Cox; (ii) a proponent of a proxy proposal has a significant business relationship with Dodge & Cox (e.g., an employee group for which Dodge & Cox manages money); (iii) Dodge & Cox has business relationships with participants in proxy contests, corporate directors or director candidates; (iv) a Dodge & Cox employee has a personal interest in the outcome of a particular matter before shareholders (e.g., a Dodge & Cox executive has a relative who serves as a director of a company); or (v) a member of

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the Dodge & Cox Funds Board of Trustees is a director of a public company held by the Funds. Dodge & Cox is committed to resolving all such and similar conflicts in its clients’ best interests. Dodge & Cox has developed these Policies and Procedures to serve the best interests of its clients and will generally vote pursuant to these Policies and Procedures when conflicts of interest arise. When there are proxy voting proposals that give rise to material conflicts of interest and such proposals are not addressed by these Policies and Procedures, the Proxy Officer or delegate may escalate the issue to the Proxy Policy Committee who will consult Dodge & Cox’s Chief Compliance Officer (CCO), and senior management. The Proxy Policy Committee, CCO, and senior management may consult with an independent consultant or counsel to resolve material conflicts of interest. Possible resolutions of such conflicts may include: (i) voting in accordance with the guidance of an independent consultant or counsel; (ii) erecting information barriers around the person or persons making voting decisions; (iii) designating a person or committee to vote that has no knowledge of any relationship between Dodge & Cox and the issuer, its officers or directors, director candidates, or proxy proponents; (iv) voting in proportion to other shareholders; or (v) voting in other ways that are consistent with Dodge & Cox’s obligation to vote in its clients’ best interests. When Dodge & Cox-managed separate accounts, funds or other collective investment vehicles are shareholders of Dodge & Cox Funds, Dodge & Cox will, where possible, vote client proxies relating to the Dodge & Cox Funds by voting the shares in the same proportion as the votes of other shareholders in the relevant Funds (so called “echo voting”).

PROXY VOTING RECORDKEEPING

Dodge & Cox maintains records of the following items: (i) these Policies and Procedures; (ii) proxy statements or proxy meeting information received regarding client securities (unless such statements are available on the SEC’s Electronic Data Gathering, Analysis, and Retrieval (EDGAR) system); (iii) records of votes Dodge & Cox cast on behalf of clients, which may be maintained by a third party service provider if the service provider undertakes to provide copies of those records promptly upon request; (iv) records of written requests for proxy voting information and Dodge & Cox’s responses to such requests (whether a client’s request was oral or in writing); and (v) any documents prepared by Dodge & Cox that were material to making a decision on how to vote or that memorialized the basis for the decision. Additionally, Dodge & Cox will maintain any documentation related to an identified material conflict of interest.

Dodge & Cox or its agent will maintain these records in an easily accessible place for at least six years from the end of the fiscal year during which the last entry was made on such record. For the first two years, Dodge & Cox or its agent will store such records at its principal office.

REVIEW OF POLICIES AND PROCEDURES

These Policies and Procedures will be subject to periodic review as deemed appropriate by Dodge & Cox.

HOW TO OBTAIN DODGE & COX FUNDS PROXY VOTING RECORD

Information regarding how Dodge & Cox, on behalf of the Dodge & Cox Funds, voted proxies relating to the Dodge & Cox Funds’ portfolio securities for the 12 months ending June 30 is available on the Dodge & Cox Funds website at dodgeandcox.com and on the SEC’s website at www.sec.gov.

Federated Hermes, Inc.

Effective 12/11/2023
Proxy Voting Policies and Procedures

Business Unit/Division: Investment Management

Purpose of this Procedure

To describe the proxy voting policies, practices and procedures of the Federated advisory companies in order to comply with Rule 206(4)-6 under the Investment Adviser’s Act of 1940 (the “Adviser’s Act”).

Governing Policy

Federated Equity Management Company of Pennsylvania, Federated Investment Management Company, Federated Global Investment Management Company, Federated Investment Counseling, Federated Investors (UK) LLP, Federated MDTA LLC, Passport Research, Ltd., and Federated Advisory Services Company (each an “Adviser” and collectively, the “Advisers”) have adopted the following proxy voting policies and procedures (the “Policies and Procedures”) in compliance with Rule 206(4)-6 under the Adviser’s Act. These Policies and Procedures shall also apply to any

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investment company registered under the Investment Company Act of 1940 (the “1940 Act”) for which an Adviser serves as an “investment adviser” (as defined in Section 2(a)(20) of the 1940 Act), provided that the Board of Directors or Trustees of such investment company has delegated to the Adviser authority to vote the investment company’s proxies, subject to the Board’s oversight and receipt of regular reports.

General Policy

Unless otherwise directed by a client or the Board of Directors or Trustees of an investment company, (referred to collectively as “Client” or “Clients”), it is the policy of the Advisers to cast proxy votes at shareholder meetings (“Company Meetings) on behalf of the Advisers’ Clients. As investment advisers with a fiduciary duty to its Clients, the Advisers will cast proxy votes in favor of management proposals and shareholder proposals that the Advisers anticipate will enhance the long-term value of the securities being voted in a manner that is consistent with the Client’s investment objectives. Generally, this will mean voting for proposals that the Advisers believe will (a) improve the management of a company, (b) increase the rights or preferences of the voted securities or (c) increase the chance that a premium offer would be made for the company. This approach to voting proxy proposals will be referred to hereafter as the General Policy. Nothing in the General Policy shall be deemed to limit the securities that the Advisers may purchase or hold on behalf of Clients. The Advisers generally vote consistently on the same matter when securities of an issuer are held by multiple Client portfolios. However, the Advisers may vote differently if a particular Client’s investment objectives differ from those of other Clients or if a Client explicitly instructs the Advisers to vote differently.

Application to Specific Proposals

The following examples illustrate how the General Policy may apply to the most common management proposals and shareholder proposals. However, whether the Advisers support or oppose a proposal will always depend on a thorough understanding of the Client’s investment objectives and the specific circumstances described in the proxy statement.

Corporate Governance

Generally, the Advisers will vote proxies:

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In favor of directors nominated in an uncontested election, but against any director who:

➢

had not attended at least 75% of the board meetings during the previous year;

➢

serves as the company’s chief financial officer, unless the company is headquartered in the UK or Ireland where this is market practice;

➢

has become over boarded (more than five boards for retired executives and more than two boards for CEO’s);

➢

is the chair of the nominating or governance committee when the roles of chairman of the board and CEO are combined and there is no lead independent director;

➢

served on the compensation committee during a period in which compensation appears excessive relative to performance and peers; or

➢

served on a board that did not implement a shareholder proposal that Federated supported and where such proposal also received more than 50% shareholder support.

•

In favor of a full slate of directors, where the directors are elected as a group and not individually, unless more than half of the nominees are not independent.

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In favor of shareholder proposals to declassify the board of directors.

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In favor of shareholder proposals to require a majority voting standard in the election of directors.

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In favor of shareholder proposals to separate the roles of chairman of the board and CEO.

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In favor of a proposal to require a company’s audit committee to be composed entirely of independent directors.

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In favor of proposals to allow shareholders owning at least 3% of the outstanding common stock for at least three years to nominate candidates for election to the board of directors (“Proxy Access”).

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In favor of proposals to grant shareholders the right to call a special meeting if owners of at least 10% of the outstanding stock agree.

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Against proposals to allow shareholders to act by written consent.

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On a case-by-case basis for proposals to adopt or amend shareholder rights plans (also known as “poison pills”).

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In favor of shareholder proposals to eliminate supermajority requirements in company bylaws.

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Shareholder Proposals on Environmental and Social Issues

Generally, the Advisers will vote every shareholder proposal of an environmental or social nature on a case-by-case basis. The quality of these shareholder proposals varies widely across markets. Similarly, company disclosures of their business practices related to environmental and social risks are not always adequate for investors to make risk assessments. Thus, the Advisers place great importance on company-specific analyses to determine how to vote. Above all, the Advisers will vote in a manner that would enhance the long-term value of the investment within the framework of the Client’s investment objectives.

Our general approach to analyzing these proposals calls for considering the literal meaning of the written proposal, the financial materiality of the proposal’s objective, and the practices followed by industry peers. This analysis utilizes research reports from our proxy advisors, company filings, as well as reports published by the company and other outside organizations.

With respect to specific categories of proposals:

Environmental. The Advisers will generally support proposals calling for enhanced reporting on the company’s business practices, including policies, strategic initiatives, and oversight mechanisms, related to environmental risks. To reach a final voting decision, the Advisers will take into consideration:

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The company’s current level of publicly available disclosure;

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Whether the company has formally committed to implementation of a reporting program based on frameworks such as the SASB materiality standards or the TCFD recommendations;

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Whether the company’s current level of disclosure is comparable to that of industry peers; and

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Whether there are significant controversies or litigation associated with the company’s environmental performance.

Social. The Advisers will generally support resolutions in the social category when they call for measures to enhance disclosure that would enable investors to make better risk assessments of the company’s social issues, such as their human capital management practices. The Advisers will generally oppose proposals calling for a change in the company’s product line or methods of distribution.

Political Activities. The Advisers will generally support enhanced disclosure of policies, practices, and oversight of corporate political activity when the current level of disclosure falls short of disclosure provided by industry peers. The Advisers will oppose proposals prohibiting the company’s participation in any part of the political process, such as making political contributions and joining trade associations.

Capital Structure

Generally, the Advisers will vote proxies for U.S. issuers:

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On a case-by-case basis for proposals to authorize the issuance of new shares if not connected to an M&A transaction and the potential dilution is more than 10%.

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Against proposals to create multiple-class voting structures where one class has superior voting rights to the other classes.

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In favor of proposals to authorize reverse stock splits unless the amount of authorized shares is not also reduced proportionately.

•

Generally, the Advisers will vote proxies for non-U.S. issuers:

•

In favor of proposals to authorize issuance of shares with and without pre-emptive rights unless the size of the authorities would threaten to unreasonably dilute existing shareholders.

Executive Compensation

Votes on executive compensation come in many forms, including advisory votes on U.S. executive compensation plans (“Say On Pay”), advisory and binding votes on the design or implementation of non-U.S. executive remuneration plans, and votes to approve new equity plans or amendments to existing plans. Generally, the Advisers will support compensation arrangements that are aligned with the Client's long-term investment objectives.

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With respect to specific categories of proposals:

Say On Pay. The Advisers will generally vote in favor of these proposals unless the plan has failed to align executive compensation with corporate performance, or the design of the plan is likely to lead to misalignment in the future. The Advisers support the principle of an annual shareholder vote on executive pay and will generally vote accordingly on proposals which set the frequency of the Say On Pay vote.

Executive Remuneration Policy. In some markets, shareholders are provided a vote on the remuneration policy, which sets out the structural elements of a company’s executive compensation plan on a forward-looking basis. The Advisers will generally support these proposals unless:

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The design of the remuneration policy fails to appropriately link executive compensation with corporate performance;

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Total compensation appears excessive relative to the company’s industry peer group, with local market dynamics also taken into account; or

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There is insufficient disclosure to enable an informed judgment, particularly as it relates to the disclosure of the maximum amounts of compensation that may be awarded.

A vote against the remuneration policy, which in most markets is not an annual voting item, would not necessarily result in votes against the Say On Pay resolution at subsequent shareholder meetings.

Equity Plans. The Advisers will generally vote in favor of equity plan proposals unless they:

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Result in unreasonable dilution to existing shareholders;

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Permit replacement of “underwater” options with new options on more favorable terms for the recipient; or

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Omit the criteria for determining the granting or vesting of awards.

M&A Activity

The Advisers will vote proxies relating to mergers, acquisitions, and sales of assets based upon the Advisers’ analysis of the proposed business strategy, the transaction price, and the expected impact on the total return for Clients.

Contested Elections

The Advisers will vote proxies relating to contested elections of directors based upon the Advisers’ analysis of the opposing slates and their proposed business strategy and the expected impact on the total return for Clients.

Cost/Benefit Analysis

Notwithstanding the foregoing policies and practices, the Advisers shall not vote any proxy if it is determined that the consequences or costs of voting outweigh the potential benefit to Clients. For example, if a foreign market requires shareholders voting proxies to retain the voted shares until the meeting date (thereby rendering the shares illiquid), the Advisers will not vote proxies for such shares. In addition, the Advisers shall not be obligated to incur any expense to send a representative to a shareholder meeting or to translate proxy materials into English.

When Federated Does Not Perform Qualitative Research

The Advisers may employ an investment strategy for certain funds or accounts that does not make use of qualitative research. For example, the MDT and the Federated index funds utilize quantitative strategies. Further, Federated may engage a sub-adviser that utilizes a quantitative strategy to manage certain funds or accounts. In all of these cases (“Non-Qualitative Accounts”), Federated may not have the kind of research to make decisions about how to vote proxies for them. Therefore, the Advisers will vote the proxies of these Non-Qualitative Accounts as follows:

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In accordance with the Standard Voting Instructions (defined below);

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If the Advisers are casting votes for the same proxy on behalf of a regular qualitative account and a Non-Qualitative Account, the Non-Qualitative Account would vote in the same manner as the regular qualitative account;

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If neither of the first two conditions apply, as the proxy voting service is recommending (see below for discussion of Proxy Advisors’ conflicts of interest); and

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If none of the previous conditions apply, as recommended by the Proxy Voting Committee.

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Securities Lending Recall

The Advisers do not have the right to vote on securities while they are on loan. The Advisers will take all reasonable steps to recall shares prior to the record date when the meeting raises issues which the Advisers believe materially affect shareholder value, provided that the Advisers consider that the benefits of voting on the securities are greater than the associated costs, including the opportunity cost of the lost revenue that would otherwise be generated by the loan. However, there can be no assurance that the Advisers will have sufficient notice of such matters to be able to terminate the loan in time to vote thereon.

When Issuers Submit Rebuttals to Glass Lewis Voting Recommendations

The Advisers will take into account feedback from issuers on the voting recommendations of Glass Lewis if the feedback is provided at least five days before the voting cut-off date. In certain circumstances, primarily those where the Advisers’ voting policy is absolute and without exception, issuer feedback will not be part of the voting decision. For example, it is the Advisers’ policy to always support a shareholder proposal to separate the roles of chairman of the board and CEO. Thus, any comments from the issuer opposing this proposal would not be considered.

Background / Overview

Under Rule 206(4)-6 of the Adviser’s Act, every investment adviser (as defined in Section 2(a)(20) of the 1940 Act) must “adopt and implement written policies and procedures that are reasonably designed to ensure that [investment advisers] vote client securities in the best interests of clients”. In addition, under Rule 30b1-4 of the 1940 Act, each registered investment management company must, no later than August 30th of each year, file a proxy voting record on Form N-PX for the most recent twelve-month period ending June 30th (See the section below entitled “Form N-PX Filing”). These Policies and Procedures are designed to ensure that the Advisers meet the requirements of these rules.

The Advisers have established a Proxy Voting Committee (the “Committee”) consisting of the following permanent voting members (unless noted otherwise):

Chief Investment Officer for Global Equity

President of the Advisers
Chief Risk Officer (non-voting)
Director of Proxy Voting (non-voting)

The permanent members may then appoint other members, both voting and non-voting, to the Committee as they deem necessary. The Committee will notify Clients upon written request of the identity of any members appointed to the Committee as well as changes made to the Committee membership.

The Committee will adopt such practices as it deems appropriate to regulate its meetings and the means of directing votes, including directions authorized by voice or electronic messages.

Employment of Proxy Voting Services

The Advisers have hired a proxy voting service to perform various proxy voting related administrative services such as ballot reconciliation, vote processing, and recordkeeping functions. Currently, this service is provided by Glass Lewis & Co. LLC. The Committee has supplied the proxy voting service with general instructions (the “Standard Voting Instructions”) that represent decisions made by the Committee in order to vote common proxy proposals. As the Committee believes that a shareholder vote is equivalent to an investment decision, the Committee retains the right to modify the Standard Voting Instructions at any time or to vote contrary to them at any time in order to cast proxy votes in a manner that is consistent with the General Policy. The proxy voting service may vote any proxy as directed in the Standard Voting Instructions without further direction from the Committee. The Advisers have executed and delivered to the proxy voting service a limited power of attorney to cast ballots on behalf of the Advisers’ Clients.

However, if the Standard Voting Instructions require case-by-case treatment for a proposal, the Proxy Voting Operations Team (the “PVOT”) will work with the investment professionals and the proxy voting service to develop a voting recommendation for the Committee. This process is described in more detail below.

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The Proxy Voting Management Group

The Committee has created the Proxy Voting Management Group (“PVMG”) to assist it in carrying out the day-to-day operations related to proxy voting. The PVMG consists of the following permanent members:

•

Head of the Responsible Investing Office

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Director of Proxy Voting

•

Chief Compliance Officer

The PVMG also consists of other members who are appointed from time to time by the Head of the Responsible Investing Office.

The day-to-day operations related to proxy voting is carried out by the PVOT and overseen by the PVMG. This work includes, but is not limited to:

•

interacting with the proxy voting service on the Committee’s behalf;

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soliciting voting recommendations from the Advisers’ investment professionals, as necessary, on case-by-case items;

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bringing voting recommendations to the Committee for case-by-case items and for voting contrary to the Standard Voting Instructions;

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engaging with portfolio companies with the intent of learning about, influencing, or exchanging perspectives on corporate governance, environmental, or social issues affecting their businesses;

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filing any required proxy voting reports with government regulators;

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providing proxy voting reports to Clients as they are requested from time to time;

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keeping the Committee informed of any issues related to proxy voting;

•

voting ballot questions of a technical, procedural, or administrative nature; and

•

voting as directed by the Committee.

Procedure Steps

Ballot Reconciliation

Federated’s Business Information Systems Department (“BISD”) will send to Glass Lewis on a daily basis a list of all voting securities held in portfolios managed by the Advisers. Glass Lewis shall use this list of voting securities to determine whether all ballots have been received. If Glass Lewis has not received all required ballots, they will contact the Advisers and assist in obtaining the missing ballots from the custodians.

Automated Voting and Vote Processing

Glass Lewis provides the following services related to voting and vote processing:

Automated voting on any proposals for which they have received Standard Voting Instructions from the Advisers.

An on-line proxy voting platform which allows the PVOT to manually cast votes on case-by-case items (see below).

Transmission of votes to voting tabulation firms and related recordkeeping.

Reporting of voting activity for use by the Committee, Clients, and the PVOT.

Case-By-Case Voting

The Standard Voting Instructions require certain proposals to be voted as “case-by-case” items. This means Glass Lewis will not automatically cast a vote but indicate to the PVOT that the proposal should be voted manually. For each case-by-case item, the PVOT will seek a voting recommendation from an investment professional who has performed qualitative research on the company. The PVOT will then present the voting recommendation to the Committee for their approval. The Committee may send the voting recommendation back to the PVOT and the investment professional for reconsideration and a new voting recommendation. Once approval is received, the PVOT will vote the item on the Glass Lewis system.

B-198

If the proposal is for any of the following questions, the PVOT will formulate a voting recommendation and notify the investment professional who has performed qualitative research on the company that, absent any objections, Federated is planning to cast a vote in accordance with that recommendation:

M&A transactions;

Questions concerning raising capital through issuance of securities;

Questions concerning divestitures and spin-offs;

Elimination of dual class common stock; or

Approval of fixed versus variable compensation ratios.

If the investment professional has no objections, the PVOT will execute the vote on the Glass Lewis system without consulting the Committee. The votes will be reported to the Committee on a quarterly basis.

If the proposal is for a highly technical, procedural, or administrative question, the Director of Proxy Voting will research the issue, determine the vote, and direct the PVOT to vote the item on the Glass Lewis system without consulting the Committee. The votes will be reported to the Committee on a quarterly basis.

When Federated Does Not Perform Qualitative Research

When a proxy proposal requires a case-by-case vote for a security held solely by a Non-Qualitative Account, the PVOT shall vote the shares, with the exception of the circumstance described below, as recommended by the proxy voting service. (See below for discussion of Proxy Advisors’ conflicts of interest.) If the case-by-case vote concerns a shareholder proposal on an environmental or social topic, the PVOT shall formulate a voting recommendation for approval by the Committee. The PVOT will retain copies of all documentation related to the vote as required in the paragraph of these Policies and Procedures entitled “Recordkeeping and Reporting.”

Small and Micro Cap Processing

The Standard Voting Instructions stipulate that certain proxy issues for smaller companies are voted differently than for larger companies. For example, US small and micro cap companies, defined as those not in the Russell 1000 universe, have different thresholds in the Standard Voting Instructions for proposals related to reporting on social and environmental matters.

Voting Shares of Mutual Funds and Exchange Traded Funds

When a Federated Fund or a Sub-Advised Mutual Fund Client Owns an Unaffiliated Mutual Fund or ETF

Rule 12d1-4 allows funds to invest in other registered investment companies in excess of the limits contained in Section 12(d)(1)(a) of the 1940 Act provided that the Acquiring and Acquired Funds both comply with certain requirements, including specific voting requirements for the Acquiring Fund. (See the Investing in Other Registered Investment Companies Procedure (“RIC Investing Policy”) for additional detail.) Under Rule 12d1-4, when voting a proxy for an Acquired Fund, the Acquiring Fund and its advisory group must mirror vote if overall ownership levels exceed certain thresholds. This mirror voting requirement does not apply if both the Acquiring and Acquired Fund are part of the same group of investment companies or the sub-adviser to the Acquiring Fund (or any person controlling, controlled by, or under common control with such sub-adviser) also acts as the adviser to the Acquired Fund. In limited circumstances, an Acquiring Fund and its advisory group may be required to use pass-through voting (seeking voting instructions from the Acquiring Fund’s own shareholders) if all the shareholders of the Acquired Fund are required by Rule 12d1-4 to mirror vote. Section 12(d)(1)(F) also provides an exemption which permits investments in excess of the limits in Section 12(d)(1)(a) provided that the certain requirements, including specific voting requirements, are satisfied. For purposes of Section 12(d)(1)(F). any fund relying on this exemption must vote proxies for shares of other registered investment companies by proxy or otherwise in the same proportion as the vote of all other holders, as described in Section 12(d)(1)(E).

Rule 12d1-4 requires mirror voting when an Acquiring Fund, and its advisory group, own more than 25% of the outstanding voting securities of an Acquired Fund as a result of a decrease in the outstanding voting securities of the Acquired Fund. If the Acquired Fund is a closed-end management investment company or a business development

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Focused Appreciation Portfolio (sub-advised by Loomis, Sayles & Company, L.P.)	•Institutional Shareholder Services, Inc., as proxy voting administrator •BBH Infomediary in connection with monthly liquidity risk management position reporting •FactSet Research Systems, Inc. and Bloomberg, in connection with conducting portfolio analytics •Global Trading Analytics and Virtu Americas LLC, in connection with trading cost analysis •Financial Recovery Technologies, in connection with class actions •ICE Data Services, in connection with performing functions related to the liquidity classifications of investments •Gresham Technologies plc, in connection with middle- office services

Large Cap Blend Portfolio Mid Cap Growth Stock Portfolio (sub-advised by J.P. Morgan Investment Management, Inc.)	•Institutional Shareholder Services, Inc., as proxy service provider •Bloomberg, in connection with market data, financial information ownership data and corporate ESG disclosure •Factset, in connection with market data, financial information ownership data and corporate ESG disclosure •CTM, in connection with electronic trade confirmation •GES International (Sustainalytics), in connection with proxy voting research, recommendations and voting management •Glass Lewis & Co., in connection with proxy voting research, recommendations and voting management •IDC ICE, in connection with corporate action processing •FIX XSP, in connection with corporate action processing •Financial Recovery Technology, in connection with the collection and filing of class action litigation claims •J.P. Morgan Chase Bank NA, in connection with fund accounting and middle-office functionss

Large Company Value Portfolio Mid Cap Value Portfolio Inflation Managed Portfolio (sub-advised by American Century Investment Management, Inc.)	•Institutional Shareholder Services, Inc., as proxy service provider •BBH Infomediary in connection with monthly liquidity risk management position reporting •FactSet Research Systems, Inc., in connection with conducting attribution analyses on the Portfolios •Gresham Technologies plc, an outsourced provider of middle office services •BlackRock Financial Management, Inc, in connection with fixed income analytical services •Bloomberg Finance L.P., in connection with fixed income trade order management and compliance •CloudMargin: in connection with collateral management •FIS XSPrisa (XSP) SaaS, in connection with corporate action services, such as collecting corporate action data and processing the elections •FX Connect, LLC: in connection with FX Derivatives reconciliation with counterparty at the point of execution •Omgeo, LLC: in connection with trade affirmations •TriOptima AB: in connection with derivatives reconciliation with counterparty •State Street Global Services: in connection with SWIFT messaging enrichment for daily trade communication to Custodian and Accounting provider.

Domestic Equity Portfolio (sub-advised by Delaware Investments Fund Advisers)	•FactSet Research Systems, Inc., in connection with conducting attribution analyses on the Portfolios •BBH Infomediary in connection with monthly liquidity risk management position reporting •The Bank of New York Mellon, in connection with fund accounting and middle-office functions

Growth Stock Portfolio Equity Income Portfolio Short-Term Bond Portfolio (sub-advised by T. Rowe Price Associates, Inc.)	•Institutional Shareholder Services, Inc., as proxy service provider •BBH Infomediary in connection with monthly liquidity risk management position reporting •The Bank of New York Mellon, in connection with fund accounting and middle-office functions •Bloomberg L.P. and FactSet Research Systems, Inc., for analytics, risk, performance attribution and reporting •MSCI, Inc., for portfolio liquidity analysis
Small Cap Value Portfolio (sub-advised by T. Rowe Price Investment Management, Inc.)	•Institutional Shareholder Services, Inc., as proxy service provider •BBH Infomediary in connection with monthly liquidity risk management position reporting •The Bank of New York Mellon, in connection with fund accounting and middle-office functions •Bloomberg L.P. and FactSet Research Systems, Inc., for analytics, risk, performance attribution and reporting •MSCI, Inc., for portfolio liquidity analysis

Small Cap Growth Stock Portfolio Large Cap Core Stock Portfolio (sub-advised by Wellington Management Company LLP)	•Accenture, Brown Brothers Harriman & Co., Markit WSO Corporation, and State Street Bank and Trust Company, in connection with certain operational functions performed for the sub-adviser •FactSet Research Systems, Inc., MSCI, Inc, in connection with analytical services provided to the sub- adviser •Glass, Lewis & Co., as proxy service provider •Dynamo Software, a technology platform to support private placement transactions

International Growth Portfolio (sub-advised by FIAM LLC)	•Institutional Shareholder Services, Inc., as a proxy voting administrator •BBH Infomediary in connection with holdings reconciliation •MSCI LiquidityMetrics in connection with the Liquidity Risk Management Program

Research International Core Portfolio (sub-advised by Massachusetts Financial Services Company (MFS))	•Institutional Shareholder Services, Inc., as proxy service provider •BBH Infomediary in connection with monthly liquidity risk management position reporting and as SWIFT messaging service provider •FactSet Research Systems, Inc., in connection with conducting attribution analyses on the Portfolios •Bloomberg L.P., and MSCI BARRA, Inc., in connection with conducting attribution analyses on the Portfolios •OMGEO, LLC, in connection with software programs utilized by the Portfolios •Commcise in connection with consulting services •Virtu ITG LLC in connection with performing trade cost analysis •Charles River Development as systems vendor •Fiserv (software system used for account reconciliation purposes) •Eagle Investment Systems (software system for portfolio accounting purposes) •ICE Data Services to assist in the processing of Corporate Action records •Confluence Technologies Inc. in connection with regulatory monitoring services

International Equity Portfolio (sub-advised by Dodge & Cox)	•Institutional Shareholder Services, Inc. (ISS), as proxy voting and class actions administrator •ICE Data Services in connection with liquidity risk management position reporting •FactSet Research Systems, Inc. and Vermilion Reporting Suite, in connection with attribution analyses; client reporting application and managed services •Cognizant Technology Solutions US Corporation, in connection with monitoring data integrity between systems, developing and supporting applications, staff augmentation for certain investment operations functions •Bloomberg Finance L.P. – Bloomberg PORT, in connection with attribution analyses •Acuity Knowledge Partners, in connection with compliance – staff augmentation •Brown Brothers Harriman and Co (BBH), in connection with OMGEO/SWIFT trade messages; inbound custodian SWIFT holdings •Eagle Investment Systems, in connection with software system for portfolio accounting purposes •Gresham Technologies plc., in connection with data sent from State Street to Gresham to reconcile accounts •IHS Markit Ltd., in connection with processing of corporate actions •Seismic Software, Inc., in connection with client reporting •State Street Investment Manager Solutions, in connection with managing post-execution functions for derivatives and collateral management •Kessler, Topaz, Meltzer, Check LLP (KTMC), a class action administrator •Microsoft Azure tenant, stores data in an encrypted format for consumption by other D&C third parties

Emerging Markets Equity Portfolio (sub-advised by abrdn Investments Limited)	•BBH Infomediary in connection with monthly liquidity risk management position reporting •Citibank N.A. London, in connection with trade processing, recordkeeping, reporting and other related middle-office services

Long-Term U.S. Government Bond Portfolio Multi-Sector Bond Portfolio (sub-advised by Pacific Investment Management Company LLC (PIMCO))	•State Street Investment Management Solutions, LLC as an outsourced provider of middle office services •BBH Infomediary in connection with monthly liquidity risk management position reporting

Select Bond Portfolio (sub-advised by Allspring Global Investments, LLC.)	•Bloomberg L.P., in connection with fixed income trading system, trade management, pre- and post- compliance, analytics, and liquidity modeling and bucketing •Clearwater Analytics, in connection with portfolio and client reporting •DTCC, in connection with handling trade confirmations and settlement instruction •Institutional Shareholder Services, Inc, as proxy service provider •Brown Brothers Harriman & Co. (BBH), in connection with standardizing trade data, executed trade communication, corporate actions management, and liquidity risk management position reporting •Factset Research Systems, Inc., in connection with conducting analysis on the Portfolio •State Street, in connection with collateral management services •Wells Fargo Technology, in connection with Information technology infrastructure support and administration of centrally managed information technology controls •FIS Employee Compliance Manager (ECM) (fka Protegent PTA) supports compliance with conflict testing of employee personal securities transactions

High Yield Bond Portfolio (sub-advised by Federated Investment Management Company)	•Bloomberg L.P., in connection with trading systems, analytics & modeling •Charles River Development in connection with compliance monitoring and equity trading •FISGlobal, for corporate action notifications •Eagle Investment Systems, LLC, portfolio accounting •Glass, Lewis & Co., as proxy service provider •Gresham Technologies plc, a partner/provider of solutions and services tailored for reconciliation, data collection and aggregation •FactSet Research Systems Inc., for analytics and modeling •Sustainalytics U.S. Inc., for ESG data and research, and portfolio analytics •MSCI ESG Research LLC, for ESG data and research, and portfolio analytics •ACA Technology Surveillance, Inc., for portfolio and trade compliance oversight and surveillance functions •The Bank of New York Mellon, in connection with fund accounting and middle-office functions •Brown Brothers Harriman & Co., in connection with certain operational functions

Index 400 Stock Portfolio Index 600 Stock Portfolio (sub-advised by Northern Trust Investments, Inc.)	•Institutional Shareholder Services, Inc., as proxy service provider •BBH Infomediary in connection with monthly liquidity risk management position reporting •Aladdin (BlackRock Solutions) as a portfolio management tool and for corporate action elections in the portfolios •Gresham Technologies plc, to communicate portfolio holdings from custodians to Aladdin for reconciliation purposes

Exhibit	Description	Filed Herewith/Incorporated Herein By Reference To
(a)1(a)	Articles of Incorporation of Northwestern Mutual Series Fund, Inc. filed with the State of Maryland on December 22, 1983	EX-99.B1 to Form N-1A Post- Effective Amendment No. 13 for Northwestern Mutual Series Fund, Inc. filed on April 26, 1996
(a)1(b)	Articles of Amendment of Northwestern Mutual Series Fund, Inc. filed with the State of Maryland on May 3, 1993	EX-99.B1(a) to Form N-1A Post- Effective Amendment No. 13 for Northwestern Mutual Series Fund, Inc. filed on April 26, 1996
(a)1(c)	Resolutions to Amend the Articles of Incorporation of Northwestern Mutual Series Fund, Inc. adopted by the Directors on February 4, 1999 and filed with the State of Maryland on February 11, 1999	Exhibit A(1) to Form N-1A Post- Effective Amendment No. 16 for Northwestern Mutual Series Fund, Inc. filed on February 25, 1999
(a)1(d)	Resolutions to Amend the Articles of Incorporation of Northwestern Mutual Series Fund, Inc. adopted by the Directors on May 3, 2001 and filed with the State of Maryland on May 4, 2001	Exhibit A(1) to Form N-1A Post- Effective Amendment No. 20 for Northwestern Mutual Series Fund, Inc. filed on May 17, 2001
(a)1(e)	Resolutions to Amend the Articles of Incorporation of Northwestern Mutual Series Fund, Inc. adopted by the Directors on November 7, 2002 and filed with the State of Maryland on January 31, 2003	Exhibit A(1) to Form N-1A Post- Effective Amendment No. 23 for Northwestern Mutual Series Fund, Inc. filed on February 14, 2003
(a)1(f)	Resolutions to Amend the Articles of Incorporation of Northwestern Mutual Series Fund, Inc. adopted by the Directors on February 6, 2003 and filed with the State of Maryland on February 7, 2003	Exhibit A(2) to Form N-1A Post- Effective Amendment No. 23 for Northwestern Mutual Series Fund, Inc. filed on February 14, 2003
(a)1(g)	Resolutions to Amend the Articles of Incorporation of Northwestern Mutual Series Fund, Inc. adopted by the Directors on August 3, 2006 and filed with the State of Maryland on February 2, 2007	Exhibit (a)1(g) to Form N-1A Post- Effective Amendment No. 29 for Northwestern Mutual Series Fund, Inc. filed on February 23, 2007
(a)1(h)	Resolutions to Amend the Articles of Incorporation of Northwestern Mutual Series Fund, Inc. adopted by the Directors on February 21, 2007 and filed with the State of Maryland on February 22, 2007	Exhibit (a)1(h) to Form N-1A Post- Effective Amendment No. 30 for Northwestern Mutual Series Fund, Inc. filed on February 23, 2007
(a)1(i)	Articles of Amendment of Northwestern Mutual Series Fund, Inc. filed with the State of Maryland on April 25, 2007	Exhibit (a)1(i) to Form N-1A Post- Effective Amendment No. 31 for Northwestern Mutual Series Fund, Inc. filed on April 27, 2007
(a)1(j)	Articles of Amendment of Northwestern Mutual Series Fund, Inc. filed with the State of Maryland on April 7, 2008	Exhibit (a)1(j) to Form N-1A Post- Effective Amendment No. 34 for Northwestern Mutual Series Fund, Inc. filed on April 23, 2008
(a)1(k)	Articles Supplementary of Northwestern Mutual Series Fund, Inc. filed with the State of Maryland on December 22, 2010	Exhibit (a)1(k) to Form N-1A Post- Effective Amendment No. 40 for Northwestern Mutual Series Fund, Inc. filed on February 11, 2011

Legal Entity Name	Domestic Jurisdiction	Owner(s)	Owner %
Operating Subsidiaries
Mason Street Advisors LLC(2)	Delaware	The Northwestern Mutual Life Insurance Company	100.00
Northwestern Long Term Care Insurance Company(2)	Wisconsin	The Northwestern Mutual Life Insurance Company	100.00
Northwestern Mutual Investment Management Company LLC(2)	Delaware	The Northwestern Mutual Life Insurance Company	100.00
Northwestern Mutual Investment Services LLC(2)	Wisconsin	The Northwestern Mutual Life Insurance Company	100.00
Northwestern Mutual Wealth Management Company(2)	Wisconsin	The Northwestern Mutual Life Insurance Company	100.00
All Other Subsidiaries

Sub-Adviser	SEC Number
American Century Investment Management, Inc.	801-8174
Massachusetts Financial Services Company	801-17352
T. Rowe Price Associates, Inc.	801-856
T. Rowe Price Investment Management, Inc.	801-121434
Pacific Investment Management Company LLC	801-48187
Dodge & Cox	801-1895
J.P. Morgan Investment Management, Inc.	801-21011
Delaware Investments Fund Advisers, a Series of Macquarie Investment Management Business Trust	801-32108
Wellington Management Company LLP	801-15908
Allspring Global Investments, LLC	801-21122
Federated Investment Management Company	801-34612
BlackRock Advisors, LLC	801-47710
Loomis, Sayles & Company, L.P.	801-170

Sub-Adviser	SEC Number
FIAM LLC	801-63658
abrdn Investments Limited	801-75074
Northern Trust Investments, Inc.	801-33358

NORTHWESTERN MUTUAL SERIES FUND, INC.
(Registrant)
By:	/s/ Paul A. Mikelson
	Paul A. Mikelson, President

Signature	Title
/s/ Paul A. Mikelson	President and Principal Executive Officer	April 25, 2025
Paul A. Mikelson
/s/ Phil J. Rinzel	Vice President, Chief Financial Officer and Treasurer	April 25, 2025
Phil J. Rinzel
/s/ Linda L. Wisniewski	Controller and Chief Accounting Officer	April 25, 2025
Linda L. Wisniewski

/s/ CHRISTY L. BROWN*	Director	April 25, 2025
Christy L. Brown
/s/ WILLIAM J. GERBER*	Director	April 25, 2025
William J. Gerber
/s/ GAIL L. HANSON*	Director	April 25, 2025
Gail L. Hanson
/s/ DAVID RIBBENS*	Director	April 25, 2025
David Ribbens
/s/ DONALD M. ULLMANN*	Director	April 25, 2025
Donald M. Ullmann
/s/ ELIZABETH A. LEVY-NAVARRO*	Director	April 25, 2025
Elizabeth A. Levy-Navarro
/s/ ROSANNE L. KROPP*	Director	April 25, 2025
Rosanne L. Kropp

*By	/s/ Paul A. Mikelson
	Paul A. Mikelson, Attorney in Fact, pursuant to the Power of Attorney filed with post-effective Amendment No. 90 to the Registrant’s Registration Statement and incorporated by reference herein.

Exhibit No.	Exhibit
(i)	Opinion and Consent of Counsel
(j)	Consent of Independent Registered Public Accounting Firm