Nuveen Life Real Estate Securities Select Fund

MAY 1, 2026, AS SUPPLEMENTED AUGUST 1, 2026

Ticker: TLRSX

This summary prospectus is designed to provide investors with key Fund information in a clear and concise format. Before you invest, you may want to review the Fund’s complete prospectus, which contains more information about the Fund and its risks. You can find the Fund’s prospectus, reports to shareholders and other information about the Fund online at www.tiaa.org/prospectus. You can also get this information at no cost by calling 800-223-1200 or by sending an email request to disclosure@tiaa.org. The Fund’s prospectus and statement of additional information, both dated May 1, 2026, are incorporated by reference into this summary prospectus and may be obtained, free of charge, at the website, phone number or e-mail address noted above.

Investment objective

The Fund seeks to obtain a favorable long-term total return through both capital appreciation and current income, by investing primarily in equity securities of companies principally engaged in or related to the real estate industry.

Fees and expenses

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. The expenses shown do not reflect any separate account fees or expenses deducted under the variable annuity contracts or variable life insurance policies using the Fund as an underlying investment option.

SHAREHOLDER FEES (fees paid directly from your investment)

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ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)

Example

This example is intended to help you compare the cost of investing in shares of the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses, before fee waivers and/or expense reimbursements, remain the same. The example assumes that the Fund’s fee waiver and/or expense reimbursement arrangements will each remain in place for the duration noted in the table above. The example does not reflect the fees and expenses of any variable annuity contract or variable life insurance policy and the costs in the example would be higher if it did. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio turnover

The Fund pays transaction costs, such as commissions, as applicable, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the fiscal year ended December 31, 2025, the Fund’s portfolio turnover rate was 29% of the average value of its portfolio.

Principal investment strategies

Under normal circumstances, the Fund invests at least 80% of its assets in the securities of companies that are principally engaged in or related to the real estate industry (“real estate securities”), including those that own significant real

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estate assets, such as real estate investment trusts (“REITs”). The Fund will invest primarily in equity securities of such companies. The Fund is actively managed using a research-oriented process with a focus on cash flows, asset values and Nuveen Asset Management, LLC’s (“Nuveen Asset Management”) belief in management’s ability to increase shareholder value. The Fund does not invest directly in real estate. The Fund concentrates its investments in the real estate industry. From time to time, the Fund may also invest in debt securities of companies principally engaged in or related to the real estate industry. For purposes of the 80% investment policy, the term “assets” means net assets, plus the amount of any borrowings for investment purposes.

An issuer is principally “engaged in” or principally “related to” the real estate industry if at least 50% of its assets, gross income or net profits are attributable to ownership, construction, management or sale of residential, commercial or industrial real estate, or to products or services related to the real estate industry. The Fund typically invests in securities issued by equity REITs (which directly own real estate), mortgage REITs (which make short-term construction or real estate development loans or invest in long-term mortgages or mortgage pools), real estate brokers and developers, homebuilders, companies that manage real estate and companies that own substantial amounts of real estate. Businesses related to the real estate industry include manufacturers and distributors of building supplies and financial institutions that make or service mortgage loans.

The Fund also may invest up to 15% of its assets in real estate securities of foreign issuers and up to 20% of its assets in equity (including preferred stock) and debt securities of issuers that are not engaged in or related to the real estate industry. The benchmark index for the Fund is the FTSE Nareit All Equity REITs Index.

Principal investment risks

You could lose money over short or long periods by investing in this Fund. An investment in the Fund, due to the nature of the Fund’s portfolio holdings, typically is subject to the following principal investment risks:

· Real Estate Investing Risk—As a result of the Fund’s investment objective, the Fund is subject to all of the risks associated with the ownership of real estate. These risks include, among others, declines in the value of real estate, negative changes in the climate for real estate, risks related to general and local economic conditions, decreases in property revenues, changes in prevailing interest rates, property taxes and operating expenses, changes in zoning laws and costs resulting from the cleanup of environmental problems.

· Active Management Risk—The risk that Nuveen Asset Management’s strategy, investment selection or trading execution may cause the Fund to underperform relative to the benchmark index or mutual funds with similar

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investment objectives and/or strategies and may not produce the desired results or expected returns.

· Market Risk—The risk that market prices of portfolio investments held by the Fund may fluctuate rapidly or unpredictably due to a variety of factors, including responses to government actions or interventions, or changing economic, political or market conditions. Market risk may affect a single issuer, industry or sector of the economy, or it may affect the market as a whole. Such conditions may add significantly to the risk of volatility in the net asset value (“NAV”) of the Fund’s shares and adversely affect the Fund and its investments. From time to time, the Fund may invest a significant portion of its assets in companies in one or more related sectors or industries, which would make the Fund more vulnerable to adverse developments affecting such sectors or industries.

· Foreign Investment Risk—Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, currency, market or economic developments as well as armed conflicts and can result in greater price volatility and perform differently from financial instruments of U.S. issuers. This risk may be heightened in emerging or developing markets. Foreign investments may also have lower liquidity and be more difficult to value than investments in U.S. issuers. Foreign investments may also be subject to risk of loss because of more or less foreign government regulation, less public information, less stringent investor protections and less stringent accounting, corporate governance, financial reporting and disclosure standards. Changes in the value of foreign currencies may make the return on an investment increase or decrease, unrelated to the quality or performance of the investment itself. The imposition of sanctions, exchange controls (including repatriation restrictions), confiscations, trade restrictions (including tariffs) and other restrictions by the United States or other governments may also negatively impact the Fund’s investments. Economic sanctions and other similar governmental actions or developments could, among other things, effectively restrict or eliminate the Fund’s ability to purchase or sell certain foreign securities or groups of foreign securities, and/or thus may make the Fund’s investments in such securities less liquid (or illiquid) or more difficult to value. The type and severity of sanctions and other measures that may be imposed could vary broadly in scope, and their impact is impossible to predict.

· Issuer Risk (often called Financial Risk)—The risk that an issuer’s earnings prospects, credit rating and overall financial position will deteriorate, causing a decline in the value of the issuer’s financial instruments over short or extended periods of time.

· Industry/Sector Concentration Risk—The risk that focusing on investment in specific industries or sectors makes a fund more vulnerable to

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developments particularly affecting those industries or sectors than a more broadly diversified fund would be.

· Large-Cap Risk—The risk that large-capitalization companies are more mature and may grow more slowly than the economy as a whole and tend to go in and out of favor based on market and economic conditions.

· Mid-Cap Risk—The risk that the stocks of mid-capitalization companies often experience greater price volatility, lower trading volume and lower overall liquidity than the stocks of larger, more established companies.

· Small-Cap Risk—The risk that the stocks of small-capitalization companies often experience greater price volatility than large- or mid-sized companies because small-cap companies are often newer or less established than larger companies and are likely to have more limited resources, products and markets. Securities of small-cap companies often have lower overall liquidity than securities of larger companies as a result of there being a smaller market for their securities, which can have an adverse effect on the pricing of these securities and on the ability to sell these securities when Nuveen Asset Management deems it appropriate.

· Illiquid Investments Risk—The risk that illiquid investments may be difficult to sell for the value at which they are carried, if at all, or at any price within the desired time frame.

Please see the non-summary portion of the Prospectus for more detailed information about the risks described above.

Past performance

The following chart and table help illustrate some of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year. The bar chart shows the annual total returns of shares of the Fund during the preceding ten-year period. Below the bar chart are the best and worst returns for a calendar quarter during the same period. The performance table following the bar chart shows the Fund’s average annual total returns over the one-year, five-year, ten-year and since-inception periods (where applicable) ended December 31, 2025, and how those returns compare to those of the Fund’s broad-based securities market index and benchmark index. For periods prior to August 1, 2026, Teachers Advisors, LLC (“Advisors”) served as investment adviser to the Fund. Returns do not reflect fees and expenses of any variable annuity or variable life insurance contract and would be lower if they did.

The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive, reimburse and/or compensate the Fund for certain fees, expenses and/or costs. Without these reductions and/or compensation, the returns of the Fund would have been lower. Past performance of the Fund is not necessarily an indication of how it will perform in the future. The broad-based securities market index and benchmark index listed below are unmanaged, and you cannot invest directly in an index. The returns for the broad-

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based securities market index and benchmark index reflect no deduction for fees, expenses or taxes.

For current performance information of the Fund, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787.

ANNUAL TOTAL RETURNS (%)

Nuveen Life Real Estate Securities Select Fund

Best quarter: 17.38%, for the quarter ended March 31, 2019. Worst quarter: -19.81%, for the quarter ended March 31, 2020.

AVERAGE ANNUAL TOTAL RETURNS

For the Periods Ended December 31, 2025 ^†

Portfolio management

Investment Adviser. Nuveen Fund Advisors, LLC.

Sub-Adviser. Nuveen Asset Management, LLC.

Portfolio Managers.

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Purchase and sale of Fund shares

Please contact the insurance company that issued your variable annuity or life insurance contract for more information on the purchase and sale of Fund shares.

Tax information

Because the only shareholders of the Fund are the insurance companies offering the contracts, no discussion is included here about the federal income tax consequences at the shareholder level. The federal income tax consequences for purchases of a variable annuity or life insurance contract are described in the prospectus for such contracts.

Payments to insurance companies and broker-dealers and other financial intermediary compensation

The Fund is only available as an underlying investment for the contracts. The Fund and its distributor (and their related companies) may make payments to the sponsoring insurance company (or its affiliates) and to broker-dealers and other financial intermediaries for distribution and/or other services. These payments may be a factor that the insurance company considers in including the Fund as an underlying investment option in the variable contract. Payments to broker-dealers and other financial intermediaries may create a conflict of interest by influencing the broker-dealer or other financial intermediary to recommend a variable product and the Fund over another investment. Ask your financial adviser or visit the website of the insurance company or the financial intermediary for more information. The disclosure document for your variable contract may contain additional information about these payments.

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MPM-LFRES-0826P