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cik0001084380:iMoneyNetMoneyFundAveragesAllGovernment317Member 2016-01-01 2025-12-31 iso4217:USD pure TIAA-CREF Funds 2026-08-01 Nuveen Bond Index Fund Investment objective The Fund seeks total return that corresponds with the total return of a broad U.S. investment-grade bond market index. Fees and expenses The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries. SHAREHOLDER FEES (fees paid directly from your investment) 0.0375 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15.00 0 0 0 0 0 ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment) 0.0006 0.0006 0.0006 0.0006 0.0006 0.0006 0.0025 0 0.0015 0 0 0 0.0009 0.0011 0.0001 0.0001 0.0026 0.0001 0.0040 0.0017 0.0022 0.0007 0.0032 0.0007 0 0 0 0 0 -0.0007 0.0040 0.0017 0.0022 0.0007 0.0032 0.0000 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 durations noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 414 17 23 7 33 0 499 55 71 23 103 0 591 96 124 40 180 0 861 217 280 90 406 0 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 and may result in higher taxes when Fund shares are held in a taxable account. 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 March 31, 2026, the Fund’s portfolio turnover rate was 28% of the average value of its portfolio. 0.28 Principal investment strategies Under normal circumstances, the Fund invests at least 80% of its assets in bonds within its benchmark and portfolio tracking index, the Bloomberg U.S. Aggregate Bond Index (the “Index”). The Fund uses a sampling technique to create a portfolio that closely matches the overall investment characteristics of the Index (for example, duration, sector diversification and credit quality) without investing in all of the securities in its index. At times the Fund may purchase securities not held in the Index, but which Nuveen Asset Management, LLC (“Nuveen Asset Management”), the Fund’s sub-adviser, believes have similar investment characteristics to securities held in its index. Generally, the Fund intends to invest in a wide spectrum of public, investment-grade, taxable debt securities denominated in U.S. dollars including government securities, as well as mortgage-backed, commercial mortgage-backed and asset-backed securities. The Fund’s investments in mortgage-backed securities may include pass-through securities sold by private, governmental and government-related organizations and U.S. Government-sponsored enterprises (“GSEs”), to the extent that such instruments are held by the Index. The Fund may also invest in securities having a variable or floating interest rate. The Fund generally will invest in foreign securities denominated in U.S. dollars only to the extent they are included or eligible to be included in the Index. For purposes of the 80% investment policy, the term “assets” means net assets, plus the amount of any borrowings for investment purposes.The securities purchased by the Fund will mainly be high-quality instruments rated in the top four credit categories by a nationally recognized statistical rating organization (“NRSRO”) or deemed to be of the same quality by Nuveen Asset Management using its own credit quality analysis. The Fund may continue to hold instruments that were rated as high-quality when purchased, but which subsequently are downgraded to below-investment-grade status or have their ratings withdrawn by one or more rating agencies.Because the return of the Index is not reduced by investment and other operating expenses, the Fund’s ability to match the Index is negatively affected by the costs of buying and selling securities, as well as other fees and expenses. The use of the Index by the Fund is not a fundamental policy of the Fund and may be changed without shareholder approval.The Fund is classified as a diversified investment company, as defined under the Investment Company Act of 1940, as amended (the “1940 Act”). However, the Fund may become non-diversified under the 1940 Act without the approval of Fund shareholders solely as a result of a change in relative market capitalization or index weighting of one or more constituents of its benchmark index, the Bloomberg U.S. Aggregate Bond Index, which the Fund seeks to track. Under normal circumstances, the Fund invests at least 80% of its assets in bonds within its benchmark and portfolio tracking index, the Bloomberg U.S. Aggregate Bond Index (the “Index”). The Fund uses a sampling technique to create a portfolio that closely matches the overall investment characteristics of the Index (for example, duration, sector diversification and credit quality) without investing in all of the securities in its index. At times the Fund may purchase securities not held in the Index, but which Nuveen Asset Management, LLC (“Nuveen Asset Management”), the Fund’s sub-adviser, believes have similar investment characteristics to securities held in its index. Generally, the Fund intends to invest in a wide spectrum of public, investment-grade, taxable debt securities denominated in U.S. dollars including government securities, as well as mortgage-backed, commercial mortgage-backed and asset-backed securities. The Fund’s investments in mortgage-backed securities may include pass-through securities sold by private, governmental and government-related organizations and U.S. Government-sponsored enterprises (“GSEs”), to the extent that such instruments are held by the Index. <a href="" id="x8x2"></a>Principal investment risksYou 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: You could lose money over short or long periods by investing in this Fund. · Interest Rate Risk (a type of Market Risk)—The risk that changes in interest rates can adversely affect the value or liquidity of, and income generated by, fixed-income investments. This risk is heightened to the extent the Fund invests in longer duration fixed-income investments and during periods when prevailing interest rates are changing. There is a risk that interest rates across the financial system may change, possibly significantly and/or rapidly. In general, changing interest rates, including rates that fall below zero, or a lack of market participants may lead to decreased liquidity and increased volatility in the fixed-income or debt markets, making it more difficult for the Fund to sell fixed-income investments. When interest rates change, the values of longer duration fixed-income securities usually change more than the values of shorter duration fixed-income securities. Conversely, fixed-income securities with shorter durations or maturities will be less volatile but may provide lower returns than fixed-income securities with longer durations or maturities. Other factors that may affect the value of debt securities include, but are not limited to, economic, political, public health, and other crises and responses by governments and companies to such crises. · Prepayment Risk—The risk that, during periods of falling interest rates, borrowers may pay off their mortgage loans sooner than expected, forcing the Fund to reinvest the unanticipated proceeds at lower interest rates and resulting in a decline in income. · Extension Risk—The risk that, during periods of rising interest rates, borrowers may pay off their mortgage loans later than expected, preventing the Fund from reinvesting principal proceeds at higher interest rates and resulting in less income than potentially available. · 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. · Credit Risk (a type of Issuer Risk)—The risk that the issuer of fixed-income investments may not be able or willing, or may be perceived (whether by market participants, rating agencies, pricing services or otherwise) as not able or willing, to meet interest or principal payments when the payments become due. Actual or perceived changes in economic, social, public health, financial or political conditions in general or that affect a particular type of investment, issuer, guarantor or counterparty can reduce the ability of the party to meet its obligations, which can affect the credit quality, liquidity and/or value of an investment. · Credit Spread Risk—The risk that credit spreads (i.e., the difference in yield between securities that is due to differences in each security’s respective credit quality) may increase when market participants believe that bonds generally have a greater risk of default, which could result in a decline in the market values of the Fund’s debt securities. · Income Volatility Risk—The risk that the level of current income from a portfolio of fixed-income investments may decline in certain interest rate environments. · Market Volatility, Liquidity and Valuation Risk (types of Market Risk)—The risk that volatile or dramatic reductions in trading activity make it difficult for the Fund to properly value its investments and that the Fund may not be able to purchase or sell an investment at an attractive price, if at all. · Index Risk—The risk that the Fund’s performance may not correspond to its benchmark index for any period of time and may underperform such index or the overall financial market. Additionally, to the extent that the Fund’s investments vary from the composition of its benchmark index, the Fund’s performance could potentially vary from the index’s performance to a greater extent than if the Fund merely attempted to replicate the index. · Fixed-Income Foreign Investment Risk—Investment in fixed-income securities or financial instruments of foreign issuers involves increased risks due to adverse issuer, political, regulatory, currency, market or economic developments as well as armed conflicts. These developments may impact the ability of a foreign debt issuer to make timely and ultimate payments on its debt obligations to the Fund or impair the Fund’s ability to enforce its rights against the foreign debt issuer. These risks are heightened in emerging or developing markets. Foreign investments may also have lower overall 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. · U.S. Government Securities Risk—Securities issued by the U.S. Government or one of its agencies or instrumentalities may receive varying levels of support from the U.S. Government, which could affect the Fund’s ability to recover should they default. To the extent the Fund invests significantly in securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities, any market movements, regulatory changes or changes in political or economic conditions that affect the securities of the U.S. Government or its agencies or instrumentalities in which the Fund invests may have a significant impact on the Fund’s performance. · 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. · Downgrade Risk—The risk that securities are subsequently downgraded should Nuveen Asset Management and/or rating agencies believe the issuer’s business outlook or creditworthiness has deteriorated. · Call Risk—The risk that, during periods of falling interest rates, an issuer may call (or repay) a fixed-income security prior to maturity, resulting in a decline in the Fund’s income. · Floating and Variable Rate Securities Risk—Floating and variable rate securities provide for a periodic adjustment in the interest rate paid on the securities. The rate adjustment intervals may be regular and range from daily up to annually, or may be based on an event, such as a change in the prime rate. Floating and variable rate securities may be subject to greater liquidity risk than other debt securities, meaning that there may be limitations on the Fund’s ability to sell the securities at any given time. Such securities also may lose value. · Non-Diversification Risk—While the Fund is considered to be a diversified investment company under the 1940 Act, the Fund may become non-diversified under the 1940 Act without Fund shareholder approval when necessary to continue to track its benchmark index. Non-diversified status means that the Fund can invest a greater percentage of its assets in the securities of a single issuer than a diversified fund. Investing in a non-diversified fund involves greater risk than investing in a diversified fund because a loss in value of a particular investment may have a greater effect on the fund’s return since that investment may represent a larger portion of the fund’s total portfolio assets. 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 Class R6 of the Fund, before taxes, in each full calendar year for the last ten years. Because the expenses vary across share classes, the performance of Class R6 may vary from the other share classes. Below the bar chart are the best and worst returns of Class R6 for a calendar quarter during the full calendar-year periods covered by the bar chart. The performance table following the bar chart shows the Fund’s average annual total returns for Class A, Class I, Premier Class, Class R6, Retirement Class and Class W over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2025, and how those returns compare to those of the Fund’s broad-based securities market and benchmark index. For periods prior to August 1, 2026, Teachers Advisors, LLC (“Advisors”) served as investment adviser to the Fund. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares.The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. The broad-based securities market and benchmark index listed below is unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market and benchmark index reflect no deduction for fees, expenses or taxes. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. 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. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. www.nuveen.com/performance ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)† Nuveen Bond Index Fund † The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 0.74%. The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 2026-06-30 0.0074 Best quarter: 6.64%, for the quarter ended December 31, 2023. Worst quarter: -5.89%, for the quarter ended March 31, 2022. Best quarter 0.0664 2023-12-31 Worst quarter -0.0589 2022-03-31 AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † 2018-09-28 2018-09-28 0.0711 -0.0045 0.0189 0.0548 -0.0162 0.0075 0.0418 -0.0084 0.0096 0.0701 -0.0057 0.0178 0.0695 -0.0060 0.0174 0.0684 -0.0072 0.0162 0.0284 -0.0152 0.0117 0.0718 -0.0039 0.0213 Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes) 0.0730 -0.0036 0.0201 0.0214 Current performance of the Fund’s shares may be higher or lower than that shown above. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. 800-842-2252 Nuveen Core Bond Fund Investment objective The Fund seeks total return, primarily through current income. Fees and expenses The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries. SHAREHOLDER FEES (fees paid directly from your investment) 0.0375 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15.00 0 0 0 0 0 ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment) 0.0027 0.0027 0.0027 0.0027 0.0027 0.0027 0.0025 0 0.0015 0 0 0 0.0008 0.0016 0.0001 0.0001 0.0026 0.0001 0.0060 0.0043 0.0043 0.0028 0.0053 0.0028 0 0 0 0 0 -0.0028 0.0060 0.0043 0.0043 0.0028 0.0053 0.0000 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 durations noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 434 44 44 29 54 0 560 138 138 90 170 0 697 241 241 157 296 0 1097 542 542 356 665 0 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 and may result in higher taxes when Fund shares are held in a taxable account. 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 March 31, 2026, the Fund’s portfolio turnover rate was 113% of the average value of its portfolio. 1.13 Principal investment strategies Under normal circumstances, the Fund invests at least 80% of its assets in bonds. For these purposes, bonds include fixed-income securities of all types. The Fund primarily invests in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, U.S. Government securities, corporate bonds, mortgage-backed and other asset-backed securities, convertible and preferred securities, senior loans and loan participations and assignments and notes. The Fund may also invest in other fixed-income securities, including those of non-investment-grade quality (usually called “high-yield” or “junk bonds”). Securities of non-investment-grade quality are speculative in nature. The Fund does not rely exclusively on rating agencies when making investment decisions. Instead, the Fund’s sub-adviser, Nuveen Asset Management, LLC (“Nuveen Asset Management”), performs its own credit analysis, paying particular attention to economic trends and other market events. The Fund may also invest in securities having a variable or floating interest rate. Individual securities or sectors may be overweighted or underweighted relative to the Fund’s benchmark index, the Bloomberg U.S. Aggregate Bond Index, when Nuveen Asset Management believes that such overweight or underweight may cause the Fund to outperform the index. For purposes of the 80% investment policy, the term “assets” means net assets, plus the amount of any borrowings for investment purposes.The Fund may invest in fixed-income securities of any duration. As of May 31, 2026, the duration of the Fund’s benchmark index, the Bloomberg U.S. Aggregate Bond Index, was 5.85 years.The Fund’s investments in mortgage-backed securities can include pass-through securities sold by private, governmental and government-related organizations and collateralized mortgage obligations (“CMOs”). Mortgage pass-through securities are created when mortgages are pooled together and interests in the pool are sold to investors. The cash flow from the underlying mortgages is “passed through” to investors in periodic principal and interest payments. CMOs are obligations that are fully collateralized directly or indirectly by a pool of mortgages from which payments of principal and interest are dedicated to the payment of principal and interest on the CMO.The Fund may use an investment strategy called “mortgage rolls” (also referred to as “dollar rolls”), in which the Fund sells securities for delivery in the current month and simultaneously contracts with a counterparty to repurchase similar (same type, coupon and maturity) but not identical securities on a specified future date. The Fund loses the right to receive principal and interest paid on the securities sold. However, the Fund would benefit to the extent of any price received for the securities sold and the lower forward price for the future purchase (often referred to as the “drop”) plus the interest earned on the short-term investment awaiting the settlement date of the forward purchase. If such benefits exceed the income and gain or loss due to mortgage repayments that would have been realized on the securities sold as part of the mortgage roll, the use of this technique will enhance the investment performance of the Fund compared with what such performance would have been without the use of mortgage rolls. Realizing benefits from the use of mortgage rolls depends upon the ability of Nuveen Asset Management to correctly predict mortgage prepayments and interest rates.The Fund may also engage in relative value trading, a strategy in which the Fund reallocates assets across different sectors and maturities. Relative value trading is designed to enhance the Fund’s returns but increases the Fund’s portfolio turnover rate.The Fund may purchase and sell futures, options, swaps, forwards and other fixed-income derivative instruments to carry out the Fund’s investment strategies. The Fund may also invest in foreign securities, including emerging markets fixed-income securities and non-dollar-denominated instruments. Under most circumstances, the Fund’s investments in fixed-income securities of foreign issuers constitute less than 25% of the Fund’s assets. Under normal circumstances, the Fund invests at least 80% of its assets in bonds. For these purposes, bonds include fixed-income securities of all types. The Fund primarily invests in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, U.S. Government securities, corporate bonds, mortgage-backed and other asset-backed securities, convertible and preferred securities, senior loans and loan participations and assignments and notes. The Fund may also invest in other fixed-income securities, including those of non-investment-grade quality (usually called “high-yield” or “junk bonds”). Securities of non-investment-grade quality are speculative in nature. The Fund does not rely exclusively on rating agencies when making investment decisions. Instead, the Fund’s sub-adviser, Nuveen Asset Management, LLC (“Nuveen Asset Management”), performs its own credit analysis, paying particular attention to economic trends and other market events. <a href="" id="x21x2"></a>Principal investment risksYou 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: You could lose money over short or long periods by investing in this Fund. · Interest Rate Risk (a type of Market Risk)—The risk that changes in interest rates can adversely affect the value or liquidity of, and income generated by, fixed-income investments. This risk is heightened to the extent the Fund invests in longer duration fixed-income investments and during periods when prevailing interest rates are changing. There is a risk that interest rates across the financial system may change, possibly significantly and/or rapidly. In general, changing interest rates, including rates that fall below zero, or a lack of market participants may lead to decreased liquidity and increased volatility in the fixed-income or debt markets, making it more difficult for the Fund to sell fixed-income investments. When interest rates change, the values of longer duration fixed-income securities usually change more than the values of shorter duration fixed-income securities. Conversely, fixed-income securities with shorter durations or maturities will be less volatile but may provide lower returns than fixed-income securities with longer durations or maturities. Other factors that may affect the value of debt securities include, but are not limited to, economic, political, public health, and other crises and responses by governments and companies to such crises. · Prepayment Risk—The risk that, during periods of falling interest rates, borrowers may pay off their mortgage loans sooner than expected, forcing the Fund to reinvest the unanticipated proceeds at lower interest rates and resulting in a decline in income. · Extension Risk—The risk that, during periods of rising interest rates, borrowers may pay off their mortgage loans later than expected, preventing the Fund from reinvesting principal proceeds at higher interest rates and resulting in less income than potentially available. · 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. · Credit Risk (a type of Issuer Risk)—The risk that the issuer of fixed-income investments may not be able or willing, or may be perceived (whether by market participants, rating agencies, pricing services or otherwise) as not able or willing, to meet interest or principal payments when the payments become due. Actual or perceived changes in economic, social, public health, financial or political conditions in general or that affect a particular type of investment, issuer, guarantor or counterparty can reduce the ability of the party to meet its obligations, which can affect the credit quality, liquidity and/or value of an investment. · Credit Spread Risk—The risk that credit spreads (i.e., the difference in yield between securities that is due to differences in each security’s respective credit quality) may increase when market participants believe that bonds generally have a greater risk of default, which could result in a decline in the market values of the Fund’s debt securities. · Income Volatility Risk—The risk that the level of current income from a portfolio of fixed-income investments may decline in certain interest rate environments. · Market Volatility, Liquidity and Valuation Risk (types of Market Risk)—The risk that volatile or dramatic reductions in trading activity make it difficult for the Fund to properly value its investments and that the Fund may not be able to purchase or sell an investment at an attractive price, if at all. · Fixed-Income Foreign Investment Risk—Investment in fixed-income securities or financial instruments of foreign issuers involves increased risks due to adverse issuer, political, regulatory, currency, market or economic developments as well as armed conflicts. These developments may impact the ability of a foreign debt issuer to make timely and ultimate payments on its debt obligations to the Fund or impair the Fund’s ability to enforce its rights against the foreign debt issuer. These risks are heightened in emerging or developing markets. Foreign investments may also have lower overall 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. · 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 investment objectives and/or strategies and may not produce the desired results or expected returns. · Call Risk—The risk that, during periods of falling interest rates, an issuer may call (or repay) a fixed-income security prior to maturity, resulting in a decline in the Fund’s income. · Mortgage Roll Risk—The risk that Nuveen Asset Management will not correctly predict mortgage prepayments and interest rates, which will diminish the Fund’s performance. · Downgrade Risk—The risk that securities are subsequently downgraded should Nuveen Asset Management and/or rating agencies believe the issuer’s business outlook or creditworthiness has deteriorated. · Non-Investment-Grade Securities Risk—Issuers of non-investment-grade securities, which are usually called “high-yield” or “junk bonds,” are typically speculative in nature, in weaker financial health and such securities can be harder to value and sell and their prices can be more volatile than more highly rated securities. While these securities generally have higher rates of interest, they also involve greater risk of default than do securities of a higher-quality rating. In times of unusual or adverse market, economic or political conditions, these securities may experience higher than normal default rates. · 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. · Senior Loan Risk—Many senior loans present credit risk comparable to high-yield securities. The liquidation of the collateral backing a senior loan may not satisfy the borrower’s obligation to the Fund in the event of non-payment of scheduled interest or principal. Senior loans also expose the Fund to call risk and illiquid investments risk. The secondary market for senior loans can be limited. Trades can be infrequent and the values for senior loans may experience volatility. In some cases, negotiations for the sale or settlement of senior loans may require weeks to complete, which may impair the Fund’s ability to raise cash to satisfy redemptions, pay dividends, pay expenses or to take advantage of other investment opportunities in a timely manner. If an issuer of a senior loan prepays or redeems the loan prior to maturity, the Fund will have to reinvest the proceeds in other senior loans or instruments that may pay lower interest rates. · Emerging Markets Risk—The risks of foreign investment often increases in countries with emerging markets or those economically tied to emerging market countries. For example, these countries may have more unstable governments than developed countries, and their economies may be based on only a few industries. Emerging market countries may also have less stringent regulation of accounting, auditing, financial reporting and recordkeeping requirements. As a result, there could be less information available about issuers in emerging market countries, which could negatively affect Nuveen Asset Management’s ability to evaluate local companies or their potential impact on the Fund’s performance. Because their financial markets may be very small, share prices of financial instruments in emerging market countries may be volatile and difficult to determine. Financial instruments of issuers in these countries may have lower overall liquidity than those of issuers in more developed countries and may be more vulnerable to market manipulation. In addition, foreign investors such as the Fund are subject to a variety of special restrictions in many emerging market countries. Moreover, legal remedies for investors in emerging markets may be more limited, and U.S. authorities may have less ability to enforce certain regulatory or legal obligations or otherwise bring actions against bad actors in emerging market countries. The risks outlined above are often more pronounced in “frontier markets” in which the Fund may invest. Frontier markets are those emerging markets that are considered to be among the smallest, least mature and least liquid. These factors may make investing in frontier market countries significantly riskier than investing in other countries. · U.S. Government Securities Risk—Securities issued by the U.S. Government or one of its agencies or instrumentalities may receive varying levels of support from the U.S. Government, which could affect the Fund’s ability to recover should they default. To the extent the Fund invests significantly in securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities, any market movements, regulatory changes or changes in political or economic conditions that affect the securities of the U.S. Government or its agencies or instrumentalities in which the Fund invests may have a significant impact on the Fund’s performance. · Floating and Variable Rate Securities Risk—Floating and variable rate securities provide for a periodic adjustment in the interest rate paid on the securities. The rate adjustment intervals may be regular and range from daily up to annually, or may be based on an event, such as a change in the prime rate. Floating and variable rate securities may be subject to greater liquidity risk than other debt securities, meaning that there may be limitations on the Fund’s ability to sell the securities at any given time. Such securities also may lose value. · Portfolio Turnover Risk—Depending on market and other conditions, the Fund may experience high portfolio turnover, which may result in greater transactional expenses, such as brokerage commissions, bid-ask spreads, or dealer mark-ups, and capital gains (which could increase taxes and, consequently, reduce returns). · Derivatives Risk—The risks associated with investing in derivatives, including futures, options, swaps, forwards, and other fixed-income derivative instruments, and other similar instruments (referred to collectively as “derivatives”) may be different and greater than the risks associated with directly investing in the underlying securities and other instruments, and include leverage risk, market risk, counterparty risk, liquidity risk, operational risk and legal risk. The Fund may use more complex derivatives that might be particularly susceptible to liquidity, credit and counterparty risk. When investing in derivatives, the Fund may lose more than the principal amount invested. Derivatives used for hedging or risk management may not operate as intended, may expose the Fund to other risks, and may be insufficient to protect the Fund from the risks they were intended to hedge. 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 Class R6 of the Fund, before taxes, in each full calendar year for the last ten years. Because the expenses vary across share classes, the performance of Class R6 may vary from the other share classes. Below the bar chart are the best and worst returns of Class R6 for a calendar quarter during the full calendar-year periods covered by the bar chart. The performance table following the bar chart shows the Fund’s average annual total returns for Class A, Class I, Premier Class, Class R6, Retirement Class and Class W over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2025, and how those returns compare to those of the Fund’s broad-based securities market and benchmark index. For periods prior to August 1, 2026, Teachers Advisors, LLC (“Advisors”) served as investment adviser to the Fund. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares.The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. The broad-based securities market and benchmark index listed below is unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market and benchmark index reflect no deduction for fees, expenses or taxes. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. 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. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. www.nuveen.com/performance ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)† Nuveen Core Bond Fund † The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 1.05%. The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 2026-06-30 0.0105 Best quarter: 6.74%, for the quarter ended December 31, 2023. Worst quarter: -5.89%, for the quarter ended March 31, 2022. Best quarter 0.0674 2023-12-31 Worst quarter -0.0589 2022-03-31 AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † 2018-09-28 2018-09-28 0.0736 0.0014 0.0257 0.0546 -0.0129 0.0113 0.0432 -0.0051 0.0136 0.0731 0.0001 0.0246 0.0719 -0.0003 0.0240 0.0704 -0.0012 0.0230 0.0294 -0.0093 0.0186 0.0765 0.0041 0.0286 Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes) 0.0730 -0.0036 0.0201 0.0214 Current performance of the Fund’s shares may be higher or lower than that shown above. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. 800-842-2252 Nuveen Core and Impact Bond Fund Investment objective The Fund seeks total return, primarily through current income, while giving special consideration to certain environmental, social and governance (“ESG”) criteria. Fees and expenses The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries. SHAREHOLDER FEES (fees paid directly from your investment) 0.0375 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15.00 0 0 0 0 ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment) 0.0033 0.0033 0.0033 0.0033 0.0033 0.0025 0 0.0015 0 0 0.0009 0.0008 0.0002 0.0002 0.0027 0.0067 0.0041 0.0050 0.0035 0.0060 0 0 0 0 0 0.0067 0.0041 0.0050 0.0035 0.0060 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 durations noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 441 42 51 36 61 581 132 160 113 192 734 230 280 197 335 1178 518 628 443 750 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 and may result in higher taxes when Fund shares are held in a taxable account. 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 March 31, 2026, the Fund’s portfolio turnover rate was 143% of the average value of its portfolio. 1.43 Principal investment strategies Under normal circumstances, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in a combination of core bonds and impact bonds. For these purposes, bonds include fixed-income securities of all types; core bonds are U.S. dollar-denominated fixed-income securities that are rated BBB- (or its equivalent) or better by at least one nationally recognized statistical rating organization (“NRSRO”) or, if unrated by any NRSRO, judged to be of comparable quality by the Fund’s sub-adviser, Nuveen Asset Management, LLC (“Nuveen Asset Management”); and impact bonds are fixed-income securities that meet the requirements of the Impact framework as described below. The Fund primarily invests in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, U.S. Government securities, corporate bonds, taxable municipal securities and mortgage-backed or other asset-backed securities. The Fund may also invest in other fixed-income securities, including those of non-investment-grade quality (usually called “high-yield” or “junk bonds”). Securities of non-investment-grade quality are speculative in nature. The Fund may also invest in securities having a variable or floating interest rate. The Fund may invest in fixed-income securities of any duration. As of May 31, 2026, the duration of the Fund’s benchmark index, the Bloomberg U.S. Aggregate Bond Index, was 5.85 years.The Fund is actively managed and does not rely exclusively on rating agencies when making investment decisions. Instead, Nuveen Asset Management performs its own credit analysis, paying particular attention to economic trends and other market events. Subject to the ESG criteria and Teachers Insurance and Annuity Association of America (“TIAA”)’s proprietary Impact framework described below, individual securities or sectors may be overweighted or underweighted relative to the Fund’s benchmark index, when Nuveen Asset Management believes that the Fund can boost returns above that of the index. When selecting investments for the Fund, Nuveen Asset Management considers certain ESG criteria or Impact framework. The Fund’s Impact framework, described in more detail below, provides direct exposure to issuers or projects that Nuveen Asset Management believes have the potential to have social or environmental benefits. The ESG criteria are generally implemented based on data provided by independent research vendor(s). In those cases where independent ESG criteria are not available for certain types of securities or for certain issuers, these securities may nonetheless be eligible for the Fund should they meet certain internal ESG criteria. The corporate issuer evaluation process favors companies with leadership in ESG performance relative to their peers. Typically, environmental assessment categories include climate change, natural resource use, waste management and environmental opportunities. Social evaluation categories include human capital, product safety and social opportunities. Governance assessment categories include corporate governance, business ethics and government & public policy. How well companies adhere to international norms and principles and involvement in major ESG controversies (examples of which may relate to the environment, customers, human rights & community, labor rights & supply chain, and governance) are other considerations.The ESG evaluation process with respect to corporate issuers is conducted on an industry-specific basis and involves the identification of key performance indicators, which are given more or less relative weight compared to the broader range of potential assessment categories. When ESG concerns exist, the evaluation process gives careful consideration to how companies address the risks and opportunities they face in the context of their sector or industry and relative to their peers. The Fund will not generally invest in companies significantly involved in certain business activities including, but not limited to, the production of alcohol, tobacco, military weapons, firearms, nuclear power, thermal coal, and gambling products and services. The ESG evaluation process with respect to government issuers favors issuers with leadership in ESG performance relative to all peers. Typically, environmental assessment categories include the issuer’s ability to protect, harness, and supplement its natural resources, and to manage environmental vulnerabilities and externalities. Social assessment categories include the issuer’s ability to develop a healthy, productive, and stable workforce and knowledge capital, and to create a supportive economic environment. Governance assessment categories include the issuer’s institutional capacity to support long-term stability and well-functioning financial, judicial, and political systems, and capacity to address environmental and social risks. The government ESG evaluation process is conducted on a global basis and reflects how an issuer’s exposure to and management of ESG risk factors may affect the long-term sustainability of its economy. While Nuveen Asset Management may invest in issuers that meet these criteria, it is not required to invest in every issuer that meets these criteria. In addition, concerns with respect to one ESG assessment category may not automatically eliminate an issuer from being considered an eligible Fund investment. The ESG criteria and the Impact framework the Fund takes into consideration are both non-fundamental investment policies and may be changed without the approval of the Fund’s shareholders.The Fund is not restricted from investing in any securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities. Nuveen Asset Management considers investments in these securities to be consistent with the Fund’s ESG criteria. The Fund also invests in certain asset-backed securities, mortgage-backed securities and other securities that represent interests in assets such as pools of mortgage loans, automobile loans or credit card receivables. These securities are typically issued by legal entities established specifically to hold assets and to issue debt obligations backed by those assets. Asset-backed or mortgage-backed securities are normally created or “sponsored” by banks or other institutions or by certain U.S. Government-sponsored enterprises (“GSEs”) such as the Federal National Mortgage Association (“Fannie Mae”) and the Federal Home Loan Mortgage Corporation (“Freddie Mac”). Nuveen Asset Management does not take into consideration whether the sponsor of an asset-backed security in which the Fund invests meets the ESG criteria or the Fund’s Impact framework. That is because asset-backed securities represent interests in pools of loans, and not of the ongoing business enterprise of the sponsor. It is therefore possible that the Fund could invest in an asset-backed or mortgage-backed security sponsored by a bank or other financial institution in which the Fund could not invest directly. The Fund’s investments in mortgage-backed securities can include pass-through securities sold by private, governmental and government-related organizations and collateralized mortgage obligations (“CMOs”). Mortgage pass-through securities are created when mortgages are pooled together and interests in the pool are sold to investors. The cash flow from the underlying mortgages is “passed through” to investors in periodic principal and interest payments. CMOs are obligations that are fully collateralized directly or indirectly by a pool of mortgages from which payments of principal and interest are dedicated to the payment of principal and interest on the CMO.Additionally, Nuveen Asset Management invests a portion of the Fund’s assets in fixed-income instruments taking into consideration the Impact framework as implemented by the Fund’s portfolio management team. As of March 31, 2026, these investments were 41.1% of the portfolio. These investments provide direct exposure to issuers and/or individual projects that Nuveen Asset Management, through its proprietary analysis, believes have the potential to have social or environmental benefits. Within this exposure to impact investments, the Fund seeks opportunities to invest in publicly traded fixed-income securities that finance initiatives in areas including affordable housing, community and economic development, renewable energy and climate change, and natural resources. These investments will be selected based on the same financial criteria used by Nuveen Asset Management in selecting the Fund’s other fixed-income investments. The portion of the Fund invested in accordance with the Impact framework is not additionally subject to ESG criteria. Nuveen Asset Management engages with certain issuers of investments deemed by Nuveen Asset Management to represent impact securities to communicate preferences and encourage alignment with industry best practices regarding use of proceeds, issuance frameworks, impact reporting, labels, and other impact investing topics.Investing on the basis of ESG criteria and according to the Fund’s Impact framework is qualitative and subjective by nature. There can be no assurance that every Fund investment will meet ESG criteria or the Impact framework, or will do so at all times, or that the ESG criteria and the Impact framework or any judgment exercised by Nuveen Asset Management will reflect the beliefs or values of any particular investor.The Fund may also use a trading technique called “mortgage rolls” or “dollar rolls” in which the Fund “rolls over” an investment in a mortgage-backed security before its settlement date in exchange for a similar security with a later settlement date. The Fund may also engage in relative value trading, a strategy in which the Fund reallocates assets across different sectors and maturities. Relative value trading is designed to enhance the Fund’s returns but increases the Fund’s portfolio turnover rate.The Fund may purchase and sell futures, options, swaps, forwards and other fixed-income derivative instruments to carry out the Fund’s investment strategies. The Fund may also invest in foreign securities, including emerging markets fixed-income securities and non-dollar-denominated instruments. Under most circumstances, the Fund’s investments in fixed-income securities of foreign issuers constitute less than 40% of the Fund’s assets.The Fund may also seek exposure to Regulation S fixed-income securities through investment in a Cayman Islands exempted company that is wholly owned and controlled by the Fund (the “Regulation S Subsidiary”). A Cayman Islands exempted company is a corporate entity established under the laws of the Cayman Islands for the purpose of conducting business mainly outside the Cayman Islands. Regulation S fixed-income securities are debt securities of U.S. and non-U.S. issuers that are issued through private placement offerings without registration with the Securities and Exchange Commission (“SEC”) pursuant to Regulation S under the Securities Act of 1933. These may include sovereign or quasi-sovereign bonds, corporate bonds and structured notes issued pursuant to Regulation S. The Regulation S Subsidiary is advised by Nuveen Asset Management and has the same investment objective as the Fund, except that the Regulation S Subsidiary may invest without limitation in Regulation S securities. The Fund may also seek exposure to certain bonds or fixed-income securities that are sold subject to selling restrictions under the Tax Equity and Fiscal Responsibility Act of 1982 (“TEFRA”), which generally restricts the purchase of such bonds to non-U.S. persons (as defined for applicable U.S. federal income tax purposes) (“TEFRA Bonds”) through investment of up to 25% of its total assets in a separate Cayman Islands exempted company that is wholly owned and controlled by the Fund (the “TEFRA Bond Subsidiary”). These may include sovereign or quasi-sovereign bonds, corporate bonds and structured notes issued pursuant to TEFRA. The TEFRA Bond Subsidiary is advised by Nuveen Asset Management and has the same investment objective as the Fund, except that the TEFRA Bond Subsidiary may invest without limitation in TEFRA Bonds. Under normal circumstances, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in a combination of core bonds and impact bonds. For these purposes, bonds include fixed-income securities of all types; core bonds are U.S. dollar-denominated fixed-income securities that are rated BBB- (or its equivalent) or better by at least one nationally recognized statistical rating organization (“NRSRO”) or, if unrated by any NRSRO, judged to be of comparable quality by the Fund’s sub-adviser, Nuveen Asset Management, LLC (“Nuveen Asset Management”); and impact bonds are fixed-income securities that meet the requirements of the Impact framework as described below. The Fund primarily invests in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, U.S. Government securities, corporate bonds, taxable municipal securities and mortgage-backed or other asset-backed securities. The Fund may also invest in other fixed-income securities, including those of non-investment-grade quality (usually called “high-yield” or “junk bonds”). Securities of non-investment-grade quality are speculative in nature. <a href="" id="x34x2"></a>Principal investment risksYou 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: You could lose money over short or long periods by investing in this Fund. · ESG Criteria and Impact Risk—The risk that because the Fund’s ESG criteria and/or proprietary Impact framework exclude securities of certain issuers for nonfinancial reasons, the Fund may forgo some market opportunities available to funds that do not use these criteria. · Interest Rate Risk (a type of Market Risk)—The risk that changes in interest rates can adversely affect the value or liquidity of, and income generated by, fixed-income investments. This risk is heightened to the extent the Fund invests in longer duration fixed-income investments and during periods when prevailing interest rates are changing. There is a risk that interest rates across the financial system may change, possibly significantly and/or rapidly. In general, changing interest rates, including rates that fall below zero, or a lack of market participants may lead to decreased liquidity and increased volatility in the fixed-income or debt markets, making it more difficult for the Fund to sell fixed-income investments. When interest rates change, the values of longer duration fixed-income securities usually change more than the values of shorter duration fixed-income securities. Conversely, fixed-income securities with shorter durations or maturities will be less volatile but may provide lower returns than fixed-income securities with longer durations or maturities. Other factors that may affect the value of debt securities include, but are not limited to, economic, political, public health, and other crises and responses by governments and companies to such crises. · Prepayment Risk—The risk that, during periods of falling interest rates, borrowers may pay off their mortgage loans sooner than expected, forcing the Fund to reinvest the unanticipated proceeds at lower interest rates and resulting in a decline in income. · Extension Risk—The risk that, during periods of rising interest rates, borrowers may pay off their mortgage loans later than expected, preventing the Fund from reinvesting principal proceeds at higher interest rates and resulting in less income than potentially available. · 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. · Credit Risk (a type of Issuer Risk)—The risk that the issuer of fixed-income investments may not be able or willing, or may be perceived (whether by market participants, rating agencies, pricing services or otherwise) as not able or willing, to meet interest or principal payments when the payments become due. Actual or perceived changes in economic, social, public health, financial or political conditions in general or that affect a particular type of investment, issuer, guarantor or counterparty can reduce the ability of the party to meet its obligations, which can affect the credit quality, liquidity and/or value of an investment. · Credit Spread Risk—The risk that credit spreads (i.e., the difference in yield between securities that is due to differences in each security’s respective credit quality) may increase when market participants believe that bonds generally have a greater risk of default, which could result in a decline in the market values of the Fund’s debt securities. · Income Volatility Risk—The risk that the level of current income from a portfolio of fixed-income investments may decline in certain interest rate environments. · Market Volatility, Liquidity and Valuation Risk (types of Market Risk)—The risk that volatile or dramatic reductions in trading activity make it difficult for the Fund to properly value its investments and that the Fund may not be able to purchase or sell an investment at an attractive price, if at all. · Fixed-Income Foreign Investment Risk—Investment in fixed-income securities or financial instruments of foreign issuers involves increased risks due to adverse issuer, political, regulatory, currency, market or economic developments as well as armed conflicts. These developments may impact the ability of a foreign debt issuer to make timely and ultimate payments on its debt obligations to the Fund or impair the Fund’s ability to enforce its rights against the foreign debt issuer. These risks are heightened in emerging or developing markets. Foreign investments may also have lower overall 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. · 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 investment objectives and/or strategies and may not produce the desired results or expected returns. · Call Risk—The risk that, during periods of falling interest rates, an issuer may call (or repay) a fixed-income security prior to maturity, resulting in a decline in the Fund’s income. · Mortgage Roll Risk—The risk that Nuveen Asset Management will not correctly predict mortgage prepayments and interest rates, which will diminish the Fund’s performance. · Downgrade Risk—The risk that securities are subsequently downgraded should Nuveen Asset Management and/or rating agencies believe the issuer’s business outlook or creditworthiness has deteriorated. · Regulation S Securities Risk—The risk that Regulation S securities may be less liquid than publicly traded securities. Regulation S securities may not be subject to the disclosure and other investor protection requirements that would be applicable to publicly traded securities. As a result, Regulation S securities may involve a high degree of business and financial risk and may result in losses. · Risks of Investments in the Fund’s TEFRA Bond Subsidiary—The Fund may seek exposure to TEFRA Bonds through investment of up to 25% of its total assets in the TEFRA Bond Subsidiary. Under the applicable U.S. Treasury regulations, income from the TEFRA Bond Subsidiary will only be considered qualifying income under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”), if certain conditions are met. The tax treatment of the investments in the TEFRA Bond Subsidiary could affect the character, timing and/or amount of the Fund’s taxable income or any gains and distributions made by the Fund. · Risks of Investments in the Fund’s Wholly Owned Subsidiaries—Neither the Regulation S Subsidiary nor the TEFRA Bond Subsidiary (together with the Regulation S Subsidiary, the “Subsidiaries”) is registered under the Investment Company Act of 1940 (the “1940 Act”), and the Subsidiaries are not subject to its investor protections (except as otherwise noted in the Prospectus). As an investor in the Subsidiaries, the Fund does not have all of the protections offered to investors by the 1940 Act. However, the Subsidiaries are wholly owned and controlled by the Fund and managed by Nuveen Asset Management. · Non-Investment-Grade Securities Risk—Issuers of non-investment-grade securities, which are usually called “high-yield” or “junk bonds,” are typically speculative in nature, in weaker financial health and such securities can be harder to value and sell and their prices can be more volatile than more highly rated securities. While these securities generally have higher rates of interest, they also involve greater risk of default than do securities of a higher-quality rating. In times of unusual or adverse market, economic or political conditions, these securities may experience higher than normal default rates. · 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. · Emerging Markets Risk—The risks of foreign investment often increases in countries with emerging markets or those economically tied to emerging market countries. For example, these countries may have more unstable governments than developed countries, and their economies may be based on only a few industries. Emerging market countries may also have less stringent regulation of accounting, auditing, financial reporting and recordkeeping requirements. As a result, there could be less information available about issuers in emerging market countries, which could negatively affect Nuveen Asset Management’s ability to evaluate local companies or their potential impact on a Fund’s performance. Because their financial markets may be very small, share prices of financial instruments in emerging market countries may be volatile and difficult to determine. Financial instruments of issuers in these countries may have lower overall liquidity than those of issuers in more developed countries and may be more vulnerable to market manipulation. In addition, foreign investors such as a Fund are subject to a variety of special restrictions in many emerging market countries. Moreover, legal remedies for investors in emerging markets may be more limited, and U.S. authorities may have less ability to enforce certain regulatory or legal obligations or otherwise bring actions against bad actors in emerging market countries. The risks outlined above are often more pronounced in “frontier markets” in which the Fund may invest. Frontier markets are those emerging markets that are considered to be among the smallest, least mature and least liquid. These factors may make investing in frontier market countries significantly riskier than investing in other countries. · U.S. Government Securities Risk—Securities issued by the U.S. Government or one of its agencies or instrumentalities may receive varying levels of support from the U.S. Government, which could affect the Fund’s ability to recover should they default. To the extent the Fund invests significantly in securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities, any market movements, regulatory changes or changes in political or economic conditions that affect the securities of the U.S. Government or its agencies or instrumentalities in which the Fund invests may have a significant impact on the Fund’s performance. · Derivatives Risk—The risks associated with investing in derivatives, including futures, options, swaps, forwards, and other fixed-income derivative instruments, and other similar instruments (referred to collectively as “derivatives”) may be different and greater than the risks associated with directly investing in the underlying securities and other instruments, and include leverage risk, market risk, counterparty risk, liquidity risk, operational risk and legal risk. The Fund may use more complex derivatives that might be particularly susceptible to liquidity, credit and counterparty risk. When investing in derivatives, the Fund may lose more than the principal amount invested. Derivatives used for hedging or risk management may not operate as intended, may expose the Fund to other risks, and may be insufficient to protect the Fund from the risks they were intended to hedge. · Portfolio Turnover Risk—Depending on market and other conditions, the Fund may experience high portfolio turnover, which may result in greater transactional expenses, such as brokerage commissions, bid-ask spreads, or dealer mark-ups, and capital gains (which could increase taxes and, consequently, reduce returns). · Floating and Variable Rate Securities Risk—Floating and variable rate securities provide for a periodic adjustment in the interest rate paid on the securities. The rate adjustment intervals may be regular and range from daily up to annually, or may be based on an event, such as a change in the prime rate. Floating and variable rate securities may be subject to greater liquidity risk than other debt securities, meaning that there may be limitations on the Fund’s ability to sell the securities at any given time. Such securities also may lose value. 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 Class R6 of the Fund, before taxes, in each full calendar year since inception of Class R6. Because the expenses vary across share classes, the performance of Class R6 may vary from the other share classes. Below the bar chart are the best and worst returns of Class R6 for a calendar quarter during the full calendar-year periods covered by the bar chart. The performance table following the bar chart shows the Fund’s average annual total returns for Class A, Class I, Premier Class, Class R6 and Retirement Class over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2025, and how those returns compare to those of the Fund’s broad-based securities market and benchmark index. For periods prior to August 1, 2026, Teachers Advisors, LLC (“Advisors”) served as investment adviser to the Fund. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares.The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. The broad-based securities market and benchmark index listed below is unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market and benchmark index reflect no deduction for fees, expenses or taxes. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. 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. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. www.nuveen.com/performance ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)† Nuveen Core and Impact Bond Fund † The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 1.04%. The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 2026-06-30 0.0104 Best quarter: 6.51%, for the quarter ended December 31, 2023. Worst quarter: -5.99%, for the quarter ended March 31, 2022. Best quarter 0.0651 2023-12-31 Worst quarter -0.0599 2022-03-31 AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † 0.0750 -0.0010 0.0232 0.0562 -0.0147 0.0094 0.0441 -0.0067 0.0119 0.0756 -0.0015 0.0225 0.0745 -0.0026 0.0216 0.0735 -0.0033 0.0206 0.0324 -0.0113 0.0165 Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes) 0.0730 -0.0036 0.0201 Current performance of the Fund’s shares may be higher or lower than that shown above. After-tax returns are shown for only one class, and after-tax returns for other classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. 800-842-2252 Nuveen Core Plus Bond Fund Investment objective The Fund seeks total return, primarily through current income. Fees and expenses The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries. SHAREHOLDER FEES (fees paid directly from your investment) 0.0375 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15.00 0 0 0 0 0 ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment) 0.0028 0.0028 0.0028 0.0028 0.0028 0.0028 0.0025 0 0.0015 0 0 0 0.0010 0.0009 0.0002 0.0002 0.0027 0.0002 0.0063 0.0037 0.0045 0.0030 0.0055 0.0030 0 -0.0001 0 -0.0001 -0.0001 -0.0030 0.0063 0.0036 0.0045 0.0029 0.0054 0.0000 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 durations noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 437 37 46 30 55 0 569 118 144 95 175 0 713 207 252 168 306 0 1132 467 567 380 688 0 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 and may result in higher taxes when Fund shares are held in a taxable account. 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 March 31, 2026, the Fund’s portfolio turnover rate was 121% of the average value of its portfolio. 1.21 Principal investment strategies Under normal circumstances, the Fund invests at least 80% of its assets in bonds. For these purposes, bonds include fixed-income securities of all types. The Fund’s portfolio is divided into two segments. The first segment, which makes up at least 70% of the Fund’s assets, is invested primarily in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, corporate bonds, U.S. Treasury and agency securities and mortgage-backed and asset-backed securities. The securities within the Fund’s first segment are mainly high-quality instruments rated in the top four credit categories by a nationally recognized statistical rating organization (“NRSRO”) or deemed to be of the same quality by Nuveen Asset Management, LLC (“Nuveen Asset Management”), the Fund’s sub-adviser, using its own credit analysis. The second segment, which will not exceed 30% of the Fund’s assets, is invested in fixed-income securities and bonds with special features in an effort to improve the Fund’s total return. Potential investments in this segment include, but are not limited to, non-investment-grade securities (those securities rated in the fifth or lower rating categories), emerging market fixed-income securities, convertible and preferred securities, senior loans and loan participations and assignments and notes. Non-investment-grade securities are usually called “high yield” or “junk bonds” and are speculative in nature. For purposes of the 80% investment policy, the term “assets” means net assets, plus the amount of any borrowings for investment purposes.The Fund’s investments may include securities having a variable or floating interest rate. The Fund may invest in fixed-income securities of any duration. As of May 31, 2026, the duration of the Fund’s benchmark index, the Bloomberg U.S. Aggregate Bond Index, was 5.85 years.The Fund’s investments in mortgage-backed securities can include pass-through securities sold by private, governmental and government-related organizations and collateralized mortgage obligations (“CMOs”). Mortgage pass-through securities are created when mortgages are pooled together and interests in the pool are sold to investors. The cash flow from the underlying mortgages is “passed through” to investors in periodic principal and interest payments. CMOs are obligations that are fully collateralized directly or indirectly by a pool of mortgages from which payments of principal and interest are dedicated to the payment of principal and interest on the CMO. The Fund may use an investment strategy called “mortgage rolls” (also referred to as “dollar rolls”), in which the Fund sells securities for delivery in the current month and simultaneously contracts with a counterparty to repurchase similar (same type, coupon and maturity) but not identical securities on a specified future date. The Fund loses the right to receive principal and interest paid on the securities sold. However, the Fund would benefit to the extent of any price received for the securities sold and the lower forward price for the future purchase (often referred to as the “drop”) plus the interest earned on the short-term investment awaiting the settlement date of the forward purchase. If such benefits exceed the income and gain or loss due to mortgage repayments that would have been realized on the securities sold as part of the mortgage roll, the use of this technique will enhance the investment performance of the Fund compared with what such performance would have been without the use of mortgage rolls. Realizing benefits from the use of mortgage rolls depends upon the ability of Nuveen Asset Management to predict correctly mortgage prepayments and interest rates.The Fund can make foreign investments, including investments in emerging market countries and non-dollar-denominated instruments, but the Fund does not expect such investments to exceed 25% of its assets under most circumstances.The Fund may also engage in relative value trading, a strategy in which the Fund reallocates assets across different sectors and maturities. Relative value trading is designed to enhance the Fund’s returns but increases the Fund’s portfolio turnover rate.The Fund may purchase and sell futures, options, swaps, forwards and other fixed-income derivative instruments to carry out the Fund’s investment strategies. Under normal circumstances, the Fund invests at least 80% of its assets in bonds. For these purposes, bonds include fixed-income securities of all types. The Fund’s portfolio is divided into two segments. The first segment, which makes up at least 70% of the Fund’s assets, is invested primarily in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, corporate bonds, U.S. Treasury and agency securities and mortgage-backed and asset-backed securities. The securities within the Fund’s first segment are mainly high-quality instruments rated in the top four credit categories by a nationally recognized statistical rating organization (“NRSRO”) or deemed to be of the same quality by Nuveen Asset Management, LLC (“Nuveen Asset Management”), the Fund’s sub-adviser, using its own credit analysis. The second segment, which will not exceed 30% of the Fund’s assets, is invested in fixed-income securities and bonds with special features in an effort to improve the Fund’s total return. Potential investments in this segment include, but are not limited to, non-investment-grade securities (those securities rated in the fifth or lower rating categories), emerging market fixed-income securities, convertible and preferred securities, senior loans and loan participations and assignments and notes. Non-investment-grade securities are usually called “high yield” or “junk bonds” and are speculative in nature. For purposes of the 80% investment policy, the term “assets” means net assets, plus the amount of any borrowings for investment purposes. <a href="" id="x47x2"></a>Principal investment risksYou 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: You could lose money over short or long periods by investing in this Fund. · Interest Rate Risk (a type of Market Risk)—The risk that changes in interest rates can adversely affect the value or liquidity of, and income generated by, fixed-income investments. This risk is heightened to the extent the Fund invests in longer duration fixed-income investments and during periods when prevailing interest rates are changing. There is a risk that interest rates across the financial system may change, possibly significantly and/or rapidly. In general, changing interest rates, including rates that fall below zero, or a lack of market participants may lead to decreased liquidity and increased volatility in the fixed-income or debt markets, making it more difficult for the Fund to sell fixed-income investments. When interest rates change, the values of longer duration fixed-income securities usually change more than the values of shorter duration fixed-income securities. Conversely, fixed-income securities with shorter durations or maturities will be less volatile but may provide lower returns than fixed-income securities with longer durations or maturities. Other factors that may affect the value of debt securities include, but are not limited to, economic, political, public health, and other crises and responses by governments and companies to such crises. · Prepayment Risk—The risk that, during periods of falling interest rates, borrowers may pay off their mortgage loans sooner than expected, forcing the Fund to reinvest the unanticipated proceeds at lower interest rates and resulting in a decline in income. · Extension Risk—The risk that, during periods of rising interest rates, borrowers may pay off their mortgage loans later than expected, preventing the Fund from reinvesting principal proceeds at higher interest rates and resulting in less income than potentially available. · 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. · Credit Risk (a type of Issuer Risk)—The risk that the issuer of fixed-income investments may not be able or willing, or may be perceived (whether by market participants, rating agencies, pricing services or otherwise) as not able or willing, to meet interest or principal payments when the payments become due. Actual or perceived changes in economic, social, public health, financial or political conditions in general or that affect a particular type of investment, issuer, guarantor or counterparty can reduce the ability of the party to meet its obligations, which can affect the credit quality, liquidity and/or value of an investment. · Credit Spread Risk—The risk that credit spreads (i.e., the difference in yield between securities that is due to differences in each security’s respective credit quality) may increase when market participants believe that bonds generally have a greater risk of default, which could result in a decline in the market values of the Fund’s debt securities. · Income Volatility Risk—The risk that the level of current income from a portfolio of fixed-income investments may decline in certain interest rate environments. · Market Volatility, Liquidity and Valuation Risk (types of Market Risk)—The risk that volatile or dramatic reductions in trading activity make it difficult for the Fund to properly value its investments and that the Fund may not be able to purchase or sell an investment at an attractive price, if at all. · Fixed-Income Foreign Investment Risk—Investment in fixed-income securities or financial instruments of foreign issuers involves increased risks due to adverse issuer, political, regulatory, currency, market or economic developments as well as armed conflicts. These developments may impact the ability of a foreign debt issuer to make timely and ultimate payments on its debt obligations to the Fund or impair the Fund’s ability to enforce its rights against the foreign debt issuer. These risks are heightened in emerging or developing markets. Foreign investments may also have lower overall 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. · 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 investment objectives and/or strategies and may not produce the desired results or expected returns. · Call Risk—The risk that, during periods of falling interest rates, an issuer may call (or repay) a fixed-income security prior to maturity, resulting in a decline in the Fund’s income. · Mortgage Roll Risk—The risk that Nuveen Asset Management will not correctly predict mortgage prepayments and interest rates, which will diminish the Fund’s performance. · Downgrade Risk—The risk that securities are subsequently downgraded should Nuveen Asset Management and/or rating agencies believe the issuer’s business outlook or creditworthiness has deteriorated. · Non-Investment-Grade Securities Risk—Issuers of non-investment-grade securities, which are usually called “high-yield” or “junk bonds,” are typically speculative in nature, in weaker financial health and such securities can be harder to value and sell and their prices can be more volatile than more highly rated securities. While these securities generally have higher rates of interest, they also involve greater risk of default than do securities of a higher-quality rating. In times of unusual or adverse market, economic or political conditions, these securities may experience higher than normal default rates. · 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. · Emerging Markets Risk—The risks of foreign investment often increases in countries with emerging markets or those economically tied to emerging market countries. For example, these countries may have more unstable governments than developed countries, and their economies may be based on only a few industries. Emerging market countries may also have less stringent regulation of accounting, auditing, financial reporting and recordkeeping requirements. As a result, there could be less information available about issuers in emerging market countries, which could negatively affect Nuveen Asset Management’s ability to evaluate local companies or their potential impact on the Fund’s performance. Because their financial markets may be very small, share prices of financial instruments in emerging market countries may be volatile and difficult to determine. Financial instruments of issuers in these countries may have lower overall liquidity than those of issuers in more developed countries and may be more vulnerable to market manipulation. In addition, foreign investors such as the Fund are subject to a variety of special restrictions in many emerging market countries. Moreover, legal remedies for investors in emerging markets may be more limited, and U.S. authorities may have less ability to enforce certain regulatory or legal obligations or otherwise bring actions against bad actors in emerging market countries. · Senior Loan Risk—Many senior loans present credit risk comparable to high-yield securities. The liquidation of the collateral backing a senior loan may not satisfy the borrower’s obligation to the Fund in the event of non-payment of scheduled interest or principal. Senior loans also expose the Fund to call risk and illiquid investments risk. The secondary market for senior loans can be limited. Trades can be infrequent and the values for senior loans may experience volatility. In some cases, negotiations for the sale or settlement of senior loans may require weeks to complete, which may impair the Fund’s ability to raise cash to satisfy redemptions, pay dividends, pay expenses or to take advantage of other investment opportunities in a timely manner. If an issuer of a senior loan prepays or redeems the loan prior to maturity, the Fund will have to reinvest the proceeds in other senior loans or instruments that may pay lower interest rates. · U.S. Government Securities Risk—Securities issued by the U.S. Government or one of its agencies or instrumentalities may receive varying levels of support from the U.S. Government, which could affect the Fund’s ability to recover should they default. To the extent the Fund invests significantly in securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities, any market movements, regulatory changes or changes in political or economic conditions that affect the securities of the U.S. Government or its agencies or instrumentalities in which the Fund invests may have a significant impact on the Fund’s performance. · Portfolio Turnover Risk—Depending on market and other conditions, the Fund may experience high portfolio turnover, which may result in greater transactional expenses, such as brokerage commissions, bid-ask spreads, or dealer mark-ups, and capital gains (which could increase taxes and, consequently, reduce returns). · Derivatives Risk—The risks associated with investing in derivatives, including futures, options, swaps, forwards, and other fixed-income derivative instruments, and other similar instruments (referred to collectively as “derivatives”) may be different and greater than the risks associated with directly investing in the underlying securities and other instruments, and include leverage risk, market risk, counterparty risk, liquidity risk, operational risk and legal risk. The Fund may use more complex derivatives that might be particularly susceptible to liquidity, credit and counterparty risk. When investing in derivatives, the Fund may lose more than the principal amount invested. Derivatives used for hedging or risk management may not operate as intended, may expose the Fund to other risks, and may be insufficient to protect the Fund from the risks they were intended to hedge. · Floating and Variable Rate Securities Risk—Floating and variable rate securities provide for a periodic adjustment in the interest rate paid on the securities. The rate adjustment intervals may be regular and range from daily up to annually, or may be based on an event, such as a change in the prime rate. Floating and variable rate securities may be subject to greater liquidity risk than other debt securities, meaning that there may be limitations on the Fund’s ability to sell the securities at any given time. Such securities also may lose value. 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 Class R6 of the Fund, before taxes, in each full calendar year for the last ten years. Because the expenses vary across share classes, the performance of Class R6 may vary from the other share classes. Below the bar chart are the best and worst returns of Class R6 for a calendar quarter during the full calendar-year periods covered by the bar chart. The performance table following the bar chart shows the Fund’s average annual total returns for Class A, Class I, Premier Class, Class R6, Retirement Class and Class W over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2025, and how those returns compare to those of the Fund’s broad-based securities market and benchmark index. For periods prior to August 1, 2026, Teachers Advisors, LLC (“Advisors”) served as investment adviser to the Fund. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares. The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. The broad-based securities market and benchmark index listed below is unmanaged, and you cannot invest directly in an index. The returns for the broad-based securities market and benchmark index reflect no deduction for fees, expenses or taxes. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. 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. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. www.nuveen.com/performance ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)† Nuveen Core Plus Bond Fund † The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 1.19%. The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 2026-06-30 0.0119 Best quarter: 6.78%, for the quarter ended December 31, 2023. Worst quarter: -6.25%, for the quarter ended June 30, 2022. Best quarter 0.0678 2023-12-31 Worst quarter -0.0625 2022-06-30 AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † 2018-09-28 2018-09-28 0.0734 0.0047 0.0284 0.0536 -0.0116 0.0129 0.0431 -0.0033 0.0151 0.0721 0.0038 0.0276 0.0718 0.0029 0.0268 0.0707 0.0022 0.0259 0.0296 -0.0062 0.0212 0.0766 0.0076 0.0310 Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes) 0.0730 -0.0036 0.0201 0.0214 Current performance of the Fund’s shares may be higher or lower than that shown above. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. 800-842-2252 Nuveen 5–15 Year Laddered Tax Exempt Bond Fund Investment objective The Fund seeks current income that is exempt from regular federal income tax. Fees and expenses The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries. SHAREHOLDER FEES (fees paid directly from your investment) 0.0300 0 0 0 0 0 0 0 0 0 0 0 15.00 0 0 ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment) 0.0025 0.0025 0.0025 0.0025 0 0 0.0013 0.0020 0.0009 0.0063 0.0045 0.0034 -0.0004 -0.0004 -0.0004 0.0059 0.0041 0.0030 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 durations noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 358 42 31 492 140 105 637 248 187 1059 563 427 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 and may result in higher taxes when Fund shares are held in a taxable account. 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 March 31, 2026, the Fund’s portfolio turnover rate was 14% of the average value of its portfolio. 0.14 Principal investment strategies Under normal circumstances, the Fund invests at least 80% of its assets in tax-exempt bonds, a type of municipal security, the interest on which, in the opinion of the issuer’s bond counsel at the time of issuance, is exempt from federal income tax, including federal alternative minimum tax (“AMT”). The Fund will generally invest in tax-exempt bonds that have a final maturity of between five and fifteen years. In pursuing its investment objective, the Fund seeks to weight investment in tax-exempt bonds such that at the time of investment in a particular bond at least 5% and not more than 15% of the Fund’s net assets (calculated based on the face (par) value of each tax-exempt bond) is invested in tax-exempt bonds with a final maturity in each year within the five- to fifteen-year maturity range. When a municipal security has a final maturity of less than five years, the Fund normally intends to sell that security within a year and reinvest the proceeds in securities with maturities in the five- to fifteen-year range. The Fund’s portfolio is “laddered” by investing in municipal obligations with different final maturities so that some obligations age out of the five- to fifteen-year maturity range during each year. The Fund may invest up to 20% of its assets in securities rated below investment-grade, or unrated securities of comparable quality, which are usually called “high-yield” or “junk bonds.” Securities of non-investment-grade quality are speculative in nature.The Fund may also invest in other municipal securities including bonds, notes, commercial paper and other instruments (including participation interests in such securities) issued by or on behalf of the states, territories and possessions of the United States (including the District of Columbia) and their political subdivisions, agencies and instrumentalities, the interest on which, in the opinion of bond counsel for the issuers at the time of issuance, is exempt from regular federal income tax (i.e., excludable from gross income for individuals for federal income tax purposes but not necessarily exempt from AMT). Some of these securities may also be exempt from certain state and local income taxes. The Fund generally defines final maturity as (i) the stated final maturity of a bond, whether or not callable; (ii) the first call date of an existing pre-refunded bond; (iii) the earliest put date of a put bond; or (iv) the monthly re-set date of a municipal floating-rate bond or obligation. All municipal obligations maturing within a calendar year will be defined as having the same final maturity. For purposes of the 80% investment policy, the term “assets” means net assets, plus the amount of any borrowings for investment purposes.Municipal securities are often issued to raise funds for various public purposes, including the construction of a wide range of public facilities such as bridges, highways, housing, hospitals, mass transportation facilities, schools, streets and public utilities such as water and sewer works.The Fund does not have a specific target for its average portfolio duration. As of May 31, 2026, the duration of the Fund’s benchmark index, the Bloomberg 10-Year Municipal Bond Index, was 5.86 years. The Fund may invest up to 20% of its assets in private activity bonds. Private activity bonds are tax-exempt bonds whose proceeds are used to finance private, for-profit organizations. The interest on these securities (including the Fund’s distribution of that interest) may be a preference item for purposes of the AMT. The AMT is a special tax system that ensures that individuals and certain corporations pay at least some federal taxes. Income from securities that are a preference item is included in the computation of the AMT.The Fund can also invest in other municipal securities, including certificates of participation, municipal leases, municipal obligation components and municipal custody receipts. In addition, the Fund can invest in municipal bonds secured by mortgages on single-family homes and multi-family projects. The Fund’s investments in these securities are subject to prepayment and extension risk. All of the Fund’s assets are dollar-denominated securities.The Fund may purchase and sell futures, options, swaps, forwards and other fixed-income derivative instruments to carry out the Fund’s investment strategies. The Fund pursues superior returns using historical yield spread and credit analysis to identify and invest in undervalued market sectors and individual securities. The Fund usually sells investments that Nuveen Asset Management, LLC (“Nuveen Asset Management”), the Fund’s sub-adviser, believes to be overvalued on a relative basis. Under normal circumstances, the Fund invests at least 80% of its assets in tax-exempt bonds, a type of municipal security, the interest on which, in the opinion of the issuer’s bond counsel at the time of issuance, is exempt from federal income tax, including federal alternative minimum tax (“AMT”). The Fund will generally invest in tax-exempt bonds that have a final maturity of between five and fifteen years. In pursuing its investment objective, the Fund seeks to weight investment in tax-exempt bonds such that at the time of investment in a particular bond at least 5% and not more than 15% of the Fund’s net assets (calculated based on the face (par) value of each tax-exempt bond) is invested in tax-exempt bonds with a final maturity in each year within the five- to fifteen-year maturity range. When a municipal security has a final maturity of less than five years, the Fund normally intends to sell that security within a year and reinvest the proceeds in securities with maturities in the five- to fifteen-year range. The Fund’s portfolio is “laddered” by investing in municipal obligations with different final maturities so that some obligations age out of the five- to fifteen-year maturity range during each year. The Fund may invest up to 20% of its assets in securities rated below investment-grade, or unrated securities of comparable quality, which are usually called “high-yield” or “junk bonds.” Securities of non-investment-grade quality are speculative in nature. <a href="" id="x60x2"></a>Principal investment risksYou 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: You could lose money over short or long periods by investing in this Fund. · Interest Rate Risk (a type of Market Risk)—The risk that changes in interest rates can adversely affect the value or liquidity of, and income generated by, fixed-income investments. This risk is heightened to the extent the Fund invests in longer duration fixed-income investments and during periods when prevailing interest rates are changing. There is a risk that interest rates across the financial system may change, possibly significantly and/or rapidly. In general, changing interest rates, including rates that fall below zero, or a lack of market participants may lead to decreased liquidity and increased volatility in the fixed-income or debt markets, making it more difficult for the Fund to sell fixed-income investments. When interest rates change, the values of longer duration fixed-income securities usually change more than the values of shorter duration fixed-income securities. Conversely, fixed-income securities with shorter durations or maturities will be less volatile but may provide lower returns than fixed-income securities with longer durations or maturities. Other factors that may affect the value of debt securities include, but are not limited to, economic, political, public health, and other crises and responses by governments and companies to such crises. · 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. · Credit Risk (a type of Issuer Risk)—The risk that the issuer of fixed-income investments may not be able or willing, or may be perceived (whether by market participants, rating agencies, pricing services or otherwise) as not able or willing, to meet interest or principal payments when the payments become due. Actual or perceived changes in economic, social, public health, financial or political conditions in general or that affect a particular type of investment, issuer, guarantor or counterparty can reduce the ability of the party to meet its obligations, which can affect the credit quality, liquidity and/or value of an investment. · Credit Spread Risk—The risk that credit spreads (i.e., the difference in yield between securities that is due to differences in each security’s respective credit quality) may increase when market participants believe that bonds generally have a greater risk of default, which could result in a decline in the market values of the Fund’s debt securities. · State and Municipal Investment Risk—Because the Fund invests significantly in tax-exempt bonds and other municipal securities, events affecting states and municipalities may adversely affect the Fund’s investments and its performance. These events may include severe financial difficulties and continued budget deficits, economic or political policy changes, tax base erosion, state constitutional limits on tax increases, and changes in the credit ratings assigned to state and municipal issuers of debt instruments. · Market Volatility, Liquidity and Valuation Risk (types of Market Risk)—The risk that volatile or dramatic reductions in trading activity make it difficult for the Fund to properly value its investments and that the Fund may not be able to purchase or sell an investment at an attractive price, if at all. · Income Volatility Risk—The risk that the level of current income from a portfolio of fixed-income investments may decline in certain interest rate environments. · 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. · 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 investment objectives and/or strategies and may not produce the desired results or expected returns. · Call Risk—The risk that, during periods of falling interest rates, an issuer may call (or repay) a fixed-income security prior to maturity, resulting in a decline in the Fund’s income. · Non-Investment-Grade Securities Risk—Issuers of non-investment-grade securities, which are usually called “high-yield” or “junk bonds,” are typically speculative in nature, in weaker financial health and such securities can be harder to value and sell and their prices can be more volatile than more highly rated securities. While these securities generally have higher rates of interest, they also involve greater risk of default than do securities of a higher-quality rating. In times of unusual or adverse market, economic or political conditions, these securities may experience higher than normal default rates. · Downgrade Risk—The risk that securities are subsequently downgraded should Nuveen Asset Management and/or rating agencies believe the issuer’s business outlook or creditworthiness has deteriorated. · Tax Risk—Income from tax-exempt municipal obligations could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or the non-compliant conduct of a bond issuer. · Derivatives Risk—The risks associated with investing in derivatives, including futures, options, swaps, forwards, and other fixed-income derivative instruments, and other similar instruments (referred to collectively as “derivatives”) may be different and greater than the risks associated with directly investing in the underlying securities and other instruments, and include leverage risk, market risk, counterparty risk, liquidity risk, operational risk and legal risk. The Fund may use more complex derivatives that might be particularly susceptible to liquidity, credit and counterparty risk. When investing in derivatives, the Fund may lose more than the principal amount invested. Derivatives used for hedging or risk management may not operate as intended, may expose the Fund to other risks, and may be insufficient to protect the Fund from the risks they were intended to hedge. 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 Class R6 of the Fund, before taxes, in each full calendar year for the last ten years. Because the expenses vary across share classes, the performance of Class R6 may vary from the other share classes. Below the bar chart are the best and worst returns of Class R6 for a calendar quarter during the full calendar-year periods covered by the bar chart. The performance table following the bar chart shows the Fund’s average annual total returns for Class A, Class I and Class R6 over the applicable one-year, five-year, ten-year and since-inception periods 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. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares.As of August 1, 2018, certain changes were made to the Fund’s investment strategy. As a result, the Fund’s performance may differ from the performance information shown below for the period prior to August 1, 2018 as the Fund did not employ a laddering approach during this period. The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) 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-based securities market index and benchmark index reflect no deduction for fees, expenses or taxes. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. 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. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. www.nuveen.com/performance ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)† Nuveen 5–15 Year Laddered Tax Exempt Bond Fund † The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 1.36%. The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 2026-06-30 0.0136 Best quarter: 6.94%, for the quarter ended December 31, 2023. Worst quarter: -6.78%, for the quarter ended March 31, 2022. Best quarter 0.0694 2023-12-31 Worst quarter -0.0678 2022-03-31 AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † 0.0475 0.0063 0.0208 0.0472 0.0057 0.0197 0.0416 0.0105 0.0214 0.0465 0.0053 0.0199 0.0121 -0.0028 0.0147 Bloomberg Municipal Bond Index (reflects no deductions for fees, expenses or taxes) 0.0425 0.0080 0.0234 Bloomberg 10-Year Municipal Bond Index 0.0592 0.0105 0.0254 Current performance of the Fund’s shares may be higher or lower than that shown above. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. 800-842-2252 Nuveen Green Bond Fund Investment objective The Fund seeks total return, primarily through current income, while giving special consideration to certain environmental criteria. Fees and expenses The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries. SHAREHOLDER FEES (fees paid directly from your investment) 0.0375 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15.00 0 0 0 0 ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment) 0.0040 0.0040 0.0040 0.0040 0.0040 0.0025 0 0.0015 0 0 0.0023 0.0023 0.0015 0.0015 0.0040 0.0088 0.0063 0.0070 0.0055 0.0080 -0.0012 -0.0012 -0.0013 -0.0013 -0.0013 0.0076 0.0051 0.0057 0.0042 0.0067 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 durations noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 450 52 58 43 68 634 190 211 163 242 833 339 377 294 431 1408 775 858 677 978 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 and may result in higher taxes when Fund shares are held in a taxable account. 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 March 31, 2026, the Fund’s portfolio turnover rate was 31% of the average value of its portfolio. 0.31 Principal investment strategies Under normal circumstances, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in green bonds. For these purposes, green bonds include fixed-income securities of all types that qualify as “green” investments as described below. The Fund primarily invests in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, U.S. Government securities, corporate bonds, taxable municipal securities and mortgage-backed or other asset-backed securities. Generally, the Fund intends to invest in bonds issued by both domestic and foreign issuers; including foreign issuers from emerging market countries. While the Fund’s investments will generally be denominated in U.S. dollars, the Fund may also invest in non-dollar-denominated instruments. The Fund may also invest in securities issued by U.S. Government-sponsored enterprises (“GSEs”) such as the Federal National Mortgage Association (“Fannie Mae”) and the Federal Home Loan Mortgage Corporation (“Freddie Mac”). The Fund may also invest in other fixed-income securities, including those of non-investment-grade quality or unrated securities of comparable quality (usually called “high-yield” or “junk bonds”). Securities of non-investment-grade quality are speculative in nature. The Fund may also invest in securities having a variable or floating interest rate. The Fund may invest in fixed-income securities of any maturity or duration. As of May 31, 2026, the duration of the Fund’s benchmark index, the Bloomberg MSCI U.S. Green Bond Index, was 4.95 years.The Fund seeks to invest the substantial majority of its assets in “green” investments. “Green” investments include, but are not limited to, securities of companies that develop or provide products or services that seek to provide environmental solutions and/or support efforts to reduce their own environmental footprint; investments that support environmental projects; structured securities that are collateralized by assets supporting environmental themes; and securities that, in the opinion of the Fund’s sub-adviser, Nuveen Asset Management, LLC (“Nuveen Asset Management”), have no more than a negligible direct negative environmental impact, which may include securities issued by the U.S. government or its agencies, and GSEs. Nuveen’s proprietary Impact framework that the Fund takes into consideration is a non-fundamental investment policy. Such framework may be changed without the approval of the Fund’s shareholders. Nuveen Asset Management seeks to invest the Fund’s assets in fixed-income instruments according to the Impact framework as implemented by the Fund’s portfolio management team. The Fund’s overall design and investment strategy centers on rigorous and independent research analysis to help identify bonds with both favorable yields and compelling relative value, and the potential for positive environmental impact as it relates to each respective issuer’s and/or individual project’s use of proceeds. These investments provide access to the following environmental themes: (1) renewable energy and climate change (including renewable energy projects, smart grid and other projects designed to make generation and transmission systems more efficient, and other projects which seek to reduce greenhouse gas emissions); and (2) natural resources (including land conservation, sustainable forestry and agriculture, remediation and redevelopment of polluted or contaminated sites, sustainable waste management projects, water infrastructure and other sustainable building projects). Nuveen Asset Management engages with certain issuers of investments deemed by Nuveen Asset Management to represent impact securities to communicate impact reporting preferences and encourage alignment with industry best practices regarding responsible investment.Investing on the basis of the Fund’s Impact framework is qualitative and subjective by nature. There can be no assurance that every Fund investment will meet the Impact framework, or will do so at all times, or that the Impact framework or any judgment exercised by Nuveen Asset Management will reflect the beliefs or values of any particular investor.The Fund is actively managed and does not rely exclusively on rating agencies when making investment decisions. Instead, Nuveen Asset Management performs its own credit analysis, paying particular attention to economic trends and other market events. Subject to the Impact framework described above, individual securities or sectors may be overweighted or underweighted relative to the Fund’s benchmark index when Nuveen Asset Management believes that the Fund can boost returns above that of the index. The Fund is not restricted from investing in any securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities. Nuveen Asset Management considers investments in these securities to be consistent with the Fund’s Impact framework. The Fund also invests in certain asset-backed securities, mortgage-backed securities and other securities that represent interests in assets such as, but not limited to, pools of mortgage loans, automobile loans or credit card receivables. These securities are typically issued by legal entities established specifically to hold assets and to issue debt obligations backed by those assets. Asset-backed or mortgage-backed securities are normally created or “sponsored” by banks or other institutions or by certain government-sponsored enterprises such as Fannie Mae or Freddie Mac. Nuveen Asset Management does not take into consideration whether the sponsor of an asset-backed security in which the Fund invests meets the Impact framework. That is because asset-backed securities represent interests in pools of loans, and not of the ongoing business enterprise of the sponsor. It is therefore possible that the Fund could invest in an asset-backed or mortgage-backed security sponsored by a bank or other financial institution in which the Fund could not invest directly. The Fund’s investments in mortgage-backed securities can include pass-through securities sold by private, governmental and government-related organizations and collateralized mortgage obligations (“CMOs”). Mortgage pass-through securities are created when mortgages are pooled together and interests in the pool are sold to investors. The cash flow from the underlying mortgages is “passed through” to investors in periodic principal and interest payments. CMOs are obligations that are fully collateralized directly or indirectly by a pool of mortgages from which payments of principal and interest are dedicated to the payment of principal and interest on the CMO.The Fund may also engage in relative value trading, a strategy in which the Fund reallocates assets across different sectors and maturities. Relative value trading is designed to enhance the Fund’s returns but increases the Fund’s portfolio turnover rate.The Fund may purchase and sell futures, options, swaps, forwards and other fixed-income derivative instruments to carry out the Fund’s investment strategies. The Fund may also invest in credit default swaps or index credit default swaps primarily to hedge or manage risks associated with assets held by the Fund or to facilitate the implementation of portfolio strategies for the Fund. The Fund may also seek exposure to Regulation S fixed-income securities through investment in a Cayman Islands exempted company that is wholly owned and controlled by the Fund (the “Subsidiary”). A Cayman Islands exempted company is a corporate entity established under the laws of the Cayman Islands for the purpose of conducting business mainly outside the Cayman Islands. Regulation S fixed-income securities are debt securities of U.S. and non-U.S. issuers that are issued through private placement offerings without registration with the Securities and Exchange Commission (“SEC”) pursuant to Regulation S under the Securities Act of 1933. These may include sovereign or quasi-sovereign bonds, corporate bonds and structured notes issued pursuant to Regulation S. The Subsidiary is advised by Nuveen Asset Management and has the same investment objective as the Fund, except that the Subsidiary may invest without limitation in Regulation S securities. Under normal circumstances, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in green bonds. For these purposes, green bonds include fixed-income securities of all types that qualify as “green” investments as described below. The Fund primarily invests in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, U.S. Government securities, corporate bonds, taxable municipal securities and mortgage-backed or other asset-backed securities. Generally, the Fund intends to invest in bonds issued by both domestic and foreign issuers; including foreign issuers from emerging market countries. While the Fund’s investments will generally be denominated in U.S. dollars, the Fund may also invest in non-dollar-denominated instruments. The Fund may also invest in securities issued by U.S. Government-sponsored enterprises (“GSEs”) such as the Federal National Mortgage Association (“Fannie Mae”) and the Federal Home Loan Mortgage Corporation (“Freddie Mac”). The Fund may also invest in other fixed-income securities, including those of non-investment-grade quality or unrated securities of comparable quality (usually called “high-yield” or “junk bonds”). Securities of non-investment-grade quality are speculative in nature. <a href="" id="x73x2"></a>Principal investment risksYou 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: You could lose money over short or long periods by investing in this Fund. · Green Investment Risk—The risk that because the Fund’s proprietary Impact framework may exclude securities of certain issuers for nonfinancial reasons, the Fund may forgo some market opportunities available to funds that do not use these criteria. In addition, because the Fund seeks to invest primarily in green investments, the value of Fund shares may be affected by events that adversely affect such investments, such as a decrease in governmental or other support for environmental initiatives, and may fluctuate more than that of a fund that does not invest primarily in green investments. · Interest Rate Risk (a type of Market Risk)—The risk that changes in interest rates can adversely affect the value or liquidity of, and income generated by, fixed-income investments. This risk is heightened to the extent the Fund invests in longer duration fixed-income investments and during periods when prevailing interest rates are changing. There is a risk that interest rates across the financial system may change, possibly significantly and/or rapidly. In general, changing interest rates, including rates that fall below zero, or a lack of market participants may lead to decreased liquidity and increased volatility in the fixed-income or debt markets, making it more difficult for the Fund to sell fixed-income investments. When interest rates change, the values of longer duration fixed-income securities usually change more than the values of shorter duration fixed-income securities. Conversely, fixed-income securities with shorter durations or maturities will be less volatile but may provide lower returns than fixed-income securities with longer durations or maturities. Other factors that may affect the value of debt securities include, but are not limited to, economic, political, public health, and other crises and responses by governments and companies to such crises. · Prepayment Risk—The risk that, during periods of falling interest rates, borrowers may pay off their mortgage loans sooner than expected, forcing the Fund to reinvest the unanticipated proceeds at lower interest rates and resulting in a decline in income. · Extension Risk—The risk that, during periods of rising interest rates, borrowers may pay off their mortgage loans later than expected, preventing the Fund from reinvesting principal proceeds at higher interest rates and resulting in less income than potentially available. · 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. · Credit Risk (a type of Issuer Risk)—The risk that the issuer of fixed-income investments may not be able or willing, or may be perceived (whether by market participants, rating agencies, pricing services or otherwise) as not able or willing, to meet interest or principal payments when the payments become due. Actual or perceived changes in economic, social, public health, financial or political conditions in general or that affect a particular type of investment, issuer, guarantor or counterparty can reduce the ability of the party to meet its obligations, which can affect the credit quality, liquidity and/or value of an investment. · Credit Spread Risk—The risk that credit spreads (i.e., the difference in yield between securities that is due to differences in each security’s respective credit quality) may increase when market participants believe that bonds generally have a greater risk of default, which could result in a decline in the market values of the Fund’s debt securities. · Income Volatility Risk—The risk that the level of current income from a portfolio of fixed-income investments may decline in certain interest rate environments. · Market Volatility, Liquidity and Valuation Risk (types of Market Risk)—The risk that volatile or dramatic reductions in trading activity make it difficult for the Fund to properly value its investments and that the Fund may not be able to purchase or sell an investment at an attractive price, if at all. · Fixed-Income Foreign Investment Risk—Investment in fixed-income securities or financial instruments of foreign issuers involves increased risks due to adverse issuer, political, regulatory, currency, market or economic developments as well as armed conflicts. These developments may impact the ability of a foreign debt issuer to make timely and ultimate payments on its debt obligations to the Fund or impair the Fund’s ability to enforce its rights against the foreign debt issuer. These risks are heightened in emerging or developing markets. Foreign investments may also have lower overall 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. · Emerging Markets Risk—The risks of foreign investment often increases in countries with emerging markets or those economically tied to emerging market countries. For example, these countries may have more unstable governments than developed countries, and their economies may be based on only a few industries. Emerging market countries may also have less stringent regulation of accounting, auditing, financial reporting and recordkeeping requirements. As a result, there could be less information available about issuers in emerging market countries, which could negatively affect Nuveen Asset Management’s ability to evaluate local companies or their potential impact on the Fund’s performance. Because their financial markets may be very small, share prices of financial instruments in emerging market countries may be volatile and difficult to determine. Financial instruments of issuers in these countries may have lower overall liquidity than those of issuers in more developed countries and may be more vulnerable to market manipulation. In addition, foreign investors such as the Fund are subject to a variety of special restrictions in many emerging market countries. Moreover, legal remedies for investors in emerging markets may be more limited, and U.S. authorities may have less ability to enforce certain regulatory or legal obligations or otherwise bring actions against bad actors in emerging market countries. · 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 investment objectives and/or strategies and may not produce the desired results or expected returns. · U.S. Government Securities Risk—Securities issued by the U.S. Government or one of its agencies or instrumentalities may receive varying levels of support from the U.S. Government, which could affect the Fund’s ability to recover should they default. To the extent the Fund invests significantly in securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities, any market movements, regulatory changes or changes in political or economic conditions that affect the securities of the U.S. Government or its agencies or instrumentalities in which the Fund invests may have a significant impact on the Fund’s performance. · 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. · Downgrade Risk—The risk that securities are subsequently downgraded should Nuveen Asset Management and/or rating agencies believe the issuer’s business outlook or creditworthiness has deteriorated. · Call Risk—The risk that, during periods of falling interest rates, an issuer may call (or repay) a fixed-income security prior to maturity, resulting in a decline in the Fund’s income. · Regulation S Securities Risk—The risk that Regulation S securities may be less liquid than publicly traded securities. Regulation S securities may not be subject to the disclosure and other investor protection requirements that would be applicable to publicly traded securities. As a result, Regulation S securities may involve a high degree of business and financial risk and may result in losses. · Risks of Investments in the Fund’s Wholly Owned Subsidiary—The Subsidiary is not registered under the Investment Company Act of 1940 (the “1940 Act”), and the Subsidiary is not subject to its investor protections (except as otherwise noted in the Prospectus). As an investor in the Subsidiary, the Fund does not have all of the protections offered to investors by the 1940 Act. However, the Subsidiary is wholly owned and controlled by the Fund and managed by Nuveen Asset Management. · Non-Investment-Grade Securities Risk—Issuers of non-investment-grade securities, which are usually called “high-yield” or “junk bonds,” are typically speculative in nature, in weaker financial health and such securities can be harder to value and sell and their prices can be more volatile than more highly rated securities. While these securities generally have higher rates of interest, they also involve greater risk of default than do securities of a higher-quality rating. In times of unusual or adverse market, economic or political conditions, these securities may experience higher than normal default rates. · Floating and Variable Rate Securities Risk—Floating and variable rate securities provide for a periodic adjustment in the interest rate paid on the securities. The rate adjustment intervals may be regular and range from daily up to annually, or may be based on an event, such as a change in the prime rate. Floating and variable rate securities may be subject to greater liquidity risk than other debt securities, meaning that there may be limitations on the Fund’s ability to sell the securities at any given time. Such securities also may lose value. · Derivatives Risk—The risks associated with investing in derivatives, including futures, options, swaps, forwards, and other fixed-income derivative instruments, and other similar instruments (referred to collectively as “derivatives”) may be different and greater than the risks associated with directly investing in the underlying securities and other instruments, and include leverage risk, market risk, counterparty risk, liquidity risk, operational risk and legal risk. The Fund may use more complex derivatives that might be particularly susceptible to liquidity, credit and counterparty risk. When investing in derivatives, the Fund may lose more than the principal amount invested. Derivatives used for hedging or risk management may not operate as intended, may expose the Fund to other risks, and may be insufficient to protect the Fund from the risks they were intended to hedge. 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 Class R6 of the Fund, before taxes, in each full calendar year since inception of Class R6. Because the expenses vary across share classes, the performance of Class R6 may vary from the other share classes. Below the bar chart are the best and worst returns of Class R6 for a calendar quarter during the full calendar-year periods covered by the bar chart. The performance table following the bar chart shows the Fund’s average annual total returns for Class A, Class I, Premier Class, Class R6 and Retirement Class over the applicable one-year, five-year, ten-year and since-inception periods 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. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares.The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) 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-based securities market index and benchmark index reflect no deduction for fees, expenses or taxes. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. 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. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. www.nuveen.com/performance ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)† Nuveen Green Bond Fund † The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 1.01%. The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 2026-06-30 0.0101 Best quarter: 7.39%, for the quarter ended June 30, 2020. Worst quarter: -5.75%, for the quarter ended March 31, 2022. Best quarter 0.0739 2020-06-30 Worst quarter -0.0575 2022-03-31 AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † 2018-11-16 2018-11-16 2018-11-16 2018-11-16 2018-11-16 2018-11-16 2018-11-16 2018-11-16 2018-11-16 0.0674 0.0025 0.0277 0.0488 -0.0124 0.0121 0.0397 -0.0045 0.0148 0.0666 0.0016 0.0270 0.0658 0.0011 0.0263 0.0648 0.0005 0.0258 0.0239 -0.0083 0.0192 Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes) 0.0730 -0.0036 0.0224 Bloomberg MSCI U.S. Green Bond Index 0.0740 0.0036 0.0296 Current performance of the Fund’s shares may be higher or lower than that shown above. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. 800-842-2252 Nuveen High Yield Fund Investment objective The Fund seeks total return primarily through high current income and, when consistent with its primary objective, capital appreciation. Fees and expenses The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries. SHAREHOLDER FEES (fees paid directly from your investment) 0.0475 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15.00 0 0 0 0 0 ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment) 0.0034 0.0034 0.0034 0.0034 0.0034 0.0034 0.0025 0 0.0015 0 0 0 0.0009 0.0016 0.0002 0.0002 0.0027 0.0002 0.0068 0.0050 0.0051 0.0036 0.0061 0.0036 0 0 0 0 0 -0.0036 0.0068 0.0050 0.0051 0.0036 0.0061 0.0000 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 durations noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 541 51 52 37 62 0 682 160 164 116 195 0 836 280 285 202 340 0 1281 628 640 456 762 0 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 and may result in higher taxes when Fund shares are held in a taxable account. 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 March 31, 2026, the Fund’s portfolio turnover rate was 48% of the average value of its portfolio. 0.48 Principal investment strategies The Fund invests primarily in lower-rated, higher-yielding fixed-income securities, such as domestic and foreign corporate bonds, debentures, senior loans, loan participations and assignments and notes, as well as convertible and preferred securities. Under normal circumstances, the Fund invests at least 80% of its assets in debt and other fixed-income securities rated lower than investment-grade (and their unrated equivalents) or other high-yielding debt securities. These are often called “junk bonds” and are speculative in nature. Most of these will be securities rated in the fifth or lower categories by a nationally recognized statistical rating organization (“NRSRO”). The Fund may also invest in securities having a variable or floating interest rate. For purposes of the 80% investment policy, the term “assets” means net assets, plus the amount of any borrowings for investment purposes.The Fund may invest up to 20% of its assets in the following types of instruments: payment-in-kind or deferred-interest obligations, defaulted securities, asset-backed securities, securities rated lower than B- or its equivalent by at least two rating agencies and securities having limited liquidity.The Fund can make foreign investments, but the Fund does not expect such investments to exceed 20% of its assets under most circumstances. The Fund can also invest in U.S. Treasury and agency securities or other short-term instruments when other suitable investment opportunities are not available, or when Nuveen Asset Management, LLC (“Nuveen Asset Management”), the Fund’s sub-adviser, would like to build the Fund’s liquidity.Over long periods of time, a broadly diversified portfolio of lower-rated, higher-yielding securities is designed to, net of capital losses, provide a higher net return than a similarly diversified portfolio of higher-rated, lower-yielding securities of similar duration. Nuveen Asset Management attempts to minimize the risks of investing in lower-rated securities by:· Doing its own credit analysis (independent of the rating agencies). The Fund buys securities of issuers with a balance of operational and financial risks that Nuveen Asset Management believes make it likely that such issuers will be able to meet their financial obligations;· Constructing a portfolio of securities diversified by industry, maturity, duration and credit quality; and· Buying or selling particular securities to seek to take advantage of anticipated changes and trends in the economy and financial markets.Nuveen Asset Management’s judgment of the value of any particular security is a function of its experience with lower-rated securities, evaluation of general economic and securities market conditions and the financial condition of the security’s issuer. Under some market conditions, the Fund may sacrifice potential yield in order to adopt a defensive posture designed to preserve capital.The Fund may purchase and sell futures, options, swaps, forwards and other fixed-income derivative instruments to carry out the Fund’s investment strategies. The benchmark index for the Fund is the ICE BofA BB-B U.S. Cash Pay High Yield Constrained Index. Under normal circumstances, the Fund invests at least 80% of its assets in debt and other fixed-income securities rated lower than investment-grade (and their unrated equivalents) or other high-yielding debt securities. These are often called “junk bonds” and are speculative in nature. Most of these will be securities rated in the fifth or lower categories by a nationally recognized statistical rating organization (“NRSRO”). <a href="" id="x86x2"></a>Principal investment risksYou 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: You could lose money over short or long periods by investing in this Fund. · 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. · Credit Risk (a type of Issuer Risk)—The risk that the issuer of fixed-income investments may not be able or willing, or may be perceived (whether by market participants, rating agencies, pricing services or otherwise) as not able or willing, to meet interest or principal payments when the payments become due. Actual or perceived changes in economic, social, public health, financial or political conditions in general or that affect a particular type of investment, issuer, guarantor or counterparty can reduce the ability of the party to meet its obligations, which can affect the credit quality, liquidity and/or value of an investment. · Non-Investment-Grade Securities Risk—Issuers of non-investment-grade securities, which are usually called “high-yield” or “junk bonds,” are typically speculative in nature, in weaker financial health and such securities can be harder to value and sell and their prices can be more volatile than more highly rated securities. While these securities generally have higher rates of interest, they also involve greater risk of default than do securities of a higher-quality rating. In times of unusual or adverse market, economic or political conditions, these securities may experience higher than normal default rates. · Interest Rate Risk (a type of Market Risk)—The risk that changes in interest rates can adversely affect the value or liquidity of, and income generated by, fixed-income investments. This risk is heightened to the extent the Fund invests in longer duration fixed-income investments and during periods when prevailing interest rates are changing. There is a risk that interest rates across the financial system may change, possibly significantly and/or rapidly. In general, changing interest rates, including rates that fall below zero, or a lack of market participants may lead to decreased liquidity and increased volatility in the fixed-income or debt markets, making it more difficult for the Fund to sell fixed-income investments. When interest rates change, the values of longer duration fixed-income securities usually change more than the values of shorter duration fixed-income securities. Conversely, fixed-income securities with shorter durations or maturities will be less volatile but may provide lower returns than fixed-income securities with longer durations or maturities. Other factors that may affect the value of debt securities include, but are not limited to, economic, political, public health, and other crises and responses by governments and companies to such crises. · Call Risk—The risk that, during periods of falling interest rates, an issuer may call (or repay) a fixed-income security prior to maturity, resulting in a decline in the Fund’s income. · Market Volatility, Liquidity and Valuation Risk (types of Market Risk)—The risk that volatile or dramatic reductions in trading activity make it difficult for the Fund to properly value its investments and that the Fund may not be able to purchase or sell an investment at an attractive price, if at all. · Income Volatility Risk—The risk that the level of current income from a portfolio of fixed-income investments may decline in certain interest rate environments. · Fixed-Income Foreign Investment Risk—Investment in fixed-income securities or financial instruments of foreign issuers involves increased risks due to adverse issuer, political, regulatory, currency, market or economic developments as well as armed conflicts. These developments may impact the ability of a foreign debt issuer to make timely and ultimate payments on its debt obligations to the Fund or impair the Fund’s ability to enforce its rights against the foreign debt issuer. These risks are heightened in emerging or developing markets. Foreign investments may also have lower overall 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. · 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 investment objectives and/or strategies and may not produce the desired results or expected returns. · 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. · Senior Loan Risk—Many senior loans present credit risk comparable to high-yield securities. The liquidation of the collateral backing a senior loan may not satisfy the borrower’s obligation to the Fund in the event of non-payment of scheduled interest or principal. Senior loans also expose the Fund to call risk and illiquid investments risk. The secondary market for senior loans can be limited. Trades can be infrequent and the values for senior loans may experience volatility. In some cases, negotiations for the sale or settlement of senior loans may require weeks to complete, which may impair the Fund’s ability to raise cash to satisfy redemptions, pay dividends, pay expenses or to take advantage of other investment opportunities in a timely manner. If an issuer of a senior loan prepays or redeems the loan prior to maturity, the Fund will have to reinvest the proceeds in other senior loans or instruments that may pay lower interest rates. · Floating and Variable Rate Securities Risk—Floating and variable rate securities provide for a periodic adjustment in the interest rate paid on the securities. The rate adjustment intervals may be regular and range from daily up to annually, or may be based on an event, such as a change in the prime rate. Floating and variable rate securities may be subject to greater liquidity risk than other debt securities, meaning that there may be limitations on the Fund’s ability to sell the securities at any given time. Such securities also may lose value. · Derivatives Risk—The risks associated with investing in derivatives, including futures, options, swaps, forwards, and other fixed-income derivative instruments, and other similar instruments (referred to collectively as “derivatives”) may be different and greater than the risks associated with directly investing in the underlying securities and other instruments, and include leverage risk, market risk, counterparty risk, liquidity risk, operational risk and legal risk. The Fund may use more complex derivatives that might be particularly susceptible to liquidity, credit and counterparty risk. When investing in derivatives, the Fund may lose more than the principal amount invested. Derivatives used for hedging or risk management may not operate as intended, may expose the Fund to other risks, and may be insufficient to protect the Fund from the risks they were intended to hedge. · Downgrade Risk—The risk that securities are subsequently downgraded should Nuveen Asset Management and/or rating agencies believe the issuer’s business outlook or creditworthiness has deteriorated. 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 Class R6 of the Fund, before taxes, in each full calendar year for the last ten years. Because the expenses vary across share classes, the performance of Class R6 may vary from the other share classes. Below the bar chart are the best and worst returns of Class R6 for a calendar quarter during the full calendar-year periods covered by the bar chart. The performance table following the bar chart shows the Fund’s average annual total returns for Class A, Class I, Premier Class, Class R6, Retirement Class and Class W over the applicable one-year, five-year, ten-year and since-inception periods 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. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares. The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) 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-based securities market index and benchmark index reflect no deduction for fees, expenses or taxes. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. 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. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. www.nuveen.com/performance ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)† Nuveen High Yield Fund † The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 2.72%. The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 2026-06-30 0.0272 Best quarter: 8.59%, for the quarter ended June 30, 2020. Worst quarter: -14.27%, for the quarter ended March 31, 2020. Best quarter 0.0859 2020-06-30 Worst quarter -0.1427 2020-03-31 AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † 2018-09-28 2018-09-28 2018-09-28 0.0839 0.0454 0.0592 0.0552 0.0206 0.0344 0.0490 0.0236 0.0345 0.0821 0.0441 0.0579 0.0822 0.0441 0.0578 0.0800 0.0428 0.0565 0.0289 0.0324 0.0510 0.0878 0.0491 0.0516 Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes) 0.0730 -0.0036 0.0201 0.0214 ICE BofA BB-B U.S. Cash Pay High Yield Constrained Index 0.0869 0.0409 0.0604 0.0513 Current performance of the Fund’s shares may be higher or lower than that shown above. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. 800-842-2252 Nuveen Short Duration and Impact Bond Fund Investment objective The Fund seeks current income while giving special consideration to certain environmental, social and governance (“ESG”) criteria. Fees and expenses The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries. SHAREHOLDER FEES (fees paid directly from your investment) 0.0250 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15.00 0 0 0 0 ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment) 0.0030 0.0030 0.0030 0.0030 0.0030 0.0025 0 0.0015 0 0 0.0021 0.0018 0.0015 0.0014 0.0039 0.0076 0.0048 0.0060 0.0044 0.0069 -0.0010 -0.0010 -0.0011 -0.0010 -0.0010 0.0066 0.0038 0.0049 0.0034 0.0059 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 durations noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 316 39 50 35 60 477 144 181 131 211 652 259 324 236 374 1160 594 740 545 849 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 and may result in higher taxes when Fund shares are held in a taxable account. 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 March 31, 2026, the Fund’s portfolio turnover rate was 305% of the average value of its portfolio. 3.05 Principal investment strategies Under normal circumstances, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in a combination of short duration bonds and impact bonds. For these purposes, bonds include fixed-income securities of any type; short duration bonds are a portfolio of fixed-income securities the average duration of which is no more than three years; and impact bonds are fixed-income securities that meet the requirements of the Impact framework as described below. The Fund primarily invests in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, U.S. Government securities, corporate bonds and mortgage-backed and other asset-backed securities. The Fund may also invest in other fixed-income securities, including those of non-investment-grade quality (usually called “high-yield” or “junk bonds”). Securities of non-investment-grade quality are speculative in nature. The Fund may also invest in securities having a variable or floating interest rate. Although the Fund may invest in fixed-income securities of any duration, the duration of the Fund’s portfolio typically ranges between one and three years. As of May 31, 2026, the duration of the Fund’s benchmark index, the Bloomberg U.S. 1–3 Year Government/Credit Bond Index, was 1.79 years. The term “duration” is defined in the Glossary section in the non-summary portion of the Prospectus. The Fund is actively managed and does not rely exclusively on rating agencies when making investment decisions. Instead, the Fund’s sub-adviser, Nuveen Asset Management, LLC (“Nuveen Asset Management”) performs its own credit analysis, paying particular attention to economic trends and other market events. Subject to the ESG criteria and Teachers Insurance and Annuity Association of America (“TIAA”)’s proprietary Impact framework described below, individual securities or sectors may be overweighted or underweighted relative to the Fund’s benchmark index, when Nuveen Asset Management believes that the Fund can boost returns above that of the index. When selecting investments for the Fund, Nuveen Asset Management considers certain ESG criteria or Impact framework. The Fund’s Impact framework, described in more detail below, provides direct exposure to issuers or projects that Nuveen Asset Management believes have the potential to have social or environmental benefits. The ESG criteria are generally implemented based on data provided by independent research vendor(s). In those limited cases where independent ESG criteria are not available for certain types of securities or for certain issuers, these securities may nonetheless be eligible for the Fund should they meet certain internal ESG criteria. The corporate issuer evaluation process favors companies with leadership in ESG performance relative to their peers. Typically, environmental assessment categories include climate change, natural resource use, waste management and environmental opportunities. Social evaluation categories include human capital, product safety and social opportunities. Governance assessment categories include corporate governance, business ethics and government & public policy. How well companies adhere to international norms and principles and involvement in major ESG controversies (examples of which may relate to the environment, customers, human rights & community, labor rights & supply chain, and governance) are other considerations.The ESG evaluation process with respect to corporate issuers is conducted on an industry-specific basis and involves the identification of key performance indicators, which are given more or less relative weight compared to the broader range of potential assessment categories. When ESG concerns exist, the evaluation process gives careful consideration to how companies address the risks and opportunities they face in the context of their sector or industry and relative to their peers. The Fund will not generally invest in companies significantly involved in certain business activities including, but not limited to, the production of alcohol, tobacco, military weapons, firearms, nuclear power, thermal coal, and gambling products and services.The ESG evaluation process with respect to government issuers favors issuers with leadership in ESG performance relative to all peers. Typically, environmental assessment categories include the issuer’s ability to protect, harness, and supplement its natural resources, and to manage environmental vulnerabilities and externalities. Social assessment categories include the issuer’s ability to develop a healthy, productive, and stable workforce and knowledge capital, and to create a supportive economic environment. Governance assessment categories include the issuer’s institutional capacity to support long-term stability and well-functioning financial, judicial, and political systems, and capacity to address environmental and social risks. The government ESG evaluation process is conducted on a global basis and reflects how an issuer’s exposure to and management of ESG risk factors may affect the long-term sustainability of its economy. While Nuveen Asset Management may invest in issuers that meet these criteria, it is not required to invest in every issuer that meets these criteria. In addition, concerns with respect to one ESG assessment category may not automatically eliminate an issuer from being considered an eligible Fund investment. The ESG criteria and the Impact framework the Fund takes into consideration are both non-fundamental investment policies and may be changed without the approval of the Fund’s shareholders.The Fund is not restricted from investing in any securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities. Nuveen Asset Management considers investments in these securities to be consistent with the Fund’s ESG criteria. The Fund also invests in certain asset-backed securities, mortgage-backed securities and other securities that represent interests in assets such as pools of mortgage loans, automobile loans or credit card receivables. These securities are typically issued by legal entities established specifically to hold assets and to issue debt obligations backed by those assets. Asset-backed or mortgage-backed securities are normally created or “sponsored” by banks or other institutions or by certain U.S. Government-sponsored enterprises (“GSEs”) such as the Federal National Mortgage Association (“Fannie Mae”) and the Federal Home Loan Mortgage Corporation (“Freddie Mac”). Nuveen Asset Management does not take into consideration whether the sponsor of an asset-backed security in which the Fund invests meets the ESG criteria or the Fund’s Impact framework. That is because asset-backed securities represent interests in pools of loans, and not of the ongoing business enterprise of the sponsor. It is therefore possible that the Fund could invest in an asset-backed or mortgage-backed security sponsored by a bank or other financial institution in which the Fund could not invest directly. The Fund’s investments in mortgage-backed securities can include pass-through securities sold by private, governmental and government-related organizations and collateralized mortgage obligations (“CMOs”). Mortgage pass-through securities are created when mortgages are pooled together and interests in the pool are sold to investors. The cash flow from the underlying mortgages is “passed through” to investors in periodic principal and interest payments. CMOs are obligations that are fully collateralized directly or indirectly by a pool of mortgages from which payments of principal and interest are dedicated to the payment of principal and interest on the CMO.Additionally, Nuveen Asset Management invests a portion of the Fund’s assets in fixed-income instruments taking into consideration the Impact framework as implemented by the Fund’s portfolio management team. These investments provide direct exposure to issuers and/or individual projects that Nuveen Asset Management, through its proprietary analysis, believes have the potential to have social or environmental benefits. Within this exposure to impact investments, the Fund seeks opportunities to invest in publicly traded fixed-income securities that finance initiatives in areas including affordable housing, community and economic development, renewable energy and climate change, and natural resources. These investments will be selected based on the same financial criteria used by Nuveen Asset Management in selecting the Fund’s other fixed-income investments. The portion of the Fund invested in accordance with the Impact framework is not additionally subject to ESG criteria. Nuveen Asset Management engages with certain issuers of investments deemed by Nuveen Asset Management to represent impact securities to communicate impact reporting preferences and encourage alignment with industry best practices regarding responsible investment.Investing on the basis of ESG criteria and according to the Fund’s Impact framework are qualitative and subjective by nature. There can be no assurance that every Fund investment will meet ESG criteria or Impact framework, or will do so at all times, or that the ESG criteria and the Impact framework or any judgment exercised by Nuveen Asset Management will reflect the beliefs or values of any particular investor.The Fund may also engage in relative value trading, a strategy in which the Fund reallocates assets across different sectors and maturities. Relative value trading is designed to enhance the Fund’s returns but increases the Fund’s portfolio turnover rate.The Fund may purchase and sell futures, options, swaps, forwards and other fixed-income derivative instruments to carry out the Fund’s investment strategies. The Fund may also invest in credit default swaps or index credit default swaps primarily to hedge or manage risks associated with assets held by the Fund or to facilitate the implementation of portfolio strategies for the Fund. The Fund may also invest in foreign securities, including emerging markets fixed-income securities and non-dollar-denominated instruments. Under most circumstances, the Fund’s investments in fixed-income securities of foreign issuers constitute less than 40% of the Fund’s assets. Under normal circumstances, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in a combination of short duration bonds and impact bonds. For these purposes, bonds include fixed-income securities of any type; short duration bonds are a portfolio of fixed-income securities the average duration of which is no more than three years; and impact bonds are fixed-income securities that meet the requirements of the Impact framework as described below. The Fund primarily invests in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, U.S. Government securities, corporate bonds and mortgage-backed and other asset-backed securities. The Fund may also invest in other fixed-income securities, including those of non-investment-grade quality (usually called “high-yield” or “junk bonds”). Securities of non-investment-grade quality are speculative in nature. <a href="" id="x99x2"></a>Principal investment risksYou 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: You could lose money over short or long periods by investing in this Fund. · ESG Criteria and Impact Risk—The risk that because the Fund’s ESG criteria and/or proprietary Impact framework exclude securities of certain issuers for nonfinancial reasons, the Fund may forgo some market opportunities available to funds that do not use these criteria. · Interest Rate Risk (a type of Market Risk)—The risk that changes in interest rates can adversely affect the value or liquidity of, and income generated by, fixed-income investments. This risk is heightened to the extent the Fund invests in longer duration fixed-income investments and during periods when prevailing interest rates are changing. There is a risk that interest rates across the financial system may change, possibly significantly and/or rapidly. In general, changing interest rates, including rates that fall below zero, or a lack of market participants may lead to decreased liquidity and increased volatility in the fixed-income or debt markets, making it more difficult for the Fund to sell fixed-income investments. When interest rates change, the values of longer duration fixed-income securities usually change more than the values of shorter duration fixed-income securities. Conversely, fixed-income securities with shorter durations or maturities will be less volatile but may provide lower returns than fixed-income securities with longer durations or maturities. Other factors that may affect the value of debt securities include, but are not limited to, economic, political, public health, and other crises and responses by governments and companies to such crises. · Prepayment Risk—The risk that, during periods of falling interest rates, borrowers may pay off their mortgage loans sooner than expected, forcing the Fund to reinvest the unanticipated proceeds at lower interest rates and resulting in a decline in income. · Extension Risk—The risk that, during periods of rising interest rates, borrowers may pay off their mortgage loans later than expected, preventing the Fund from reinvesting principal proceeds at higher interest rates and resulting in less income than potentially available. · 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. · Credit Risk (a type of Issuer Risk)—The risk that the issuer of fixed-income investments may not be able or willing, or may be perceived (whether by market participants, rating agencies, pricing services or otherwise) as not able or willing, to meet interest or principal payments when the payments become due. Actual or perceived changes in economic, social, public health, financial or political conditions in general or that affect a particular type of investment, issuer, guarantor or counterparty can reduce the ability of the party to meet its obligations, which can affect the credit quality, liquidity and/or value of an investment. · Credit Spread Risk—The risk that credit spreads (i.e., the difference in yield between securities that is due to differences in each security’s respective credit quality) may increase when market participants believe that bonds generally have a greater risk of default, which could result in a decline in the market values of the Fund’s debt securities. · Income Volatility Risk—The risk that the level of current income from a portfolio of fixed-income investments may decline in certain interest rate environments. · Market Volatility, Liquidity and Valuation Risk (types of Market Risk)—The risk that volatile or dramatic reductions in trading activity make it difficult for the Fund to properly value its investments and that the Fund may not be able to purchase or sell an investment at an attractive price, if at all. · Fixed-Income Foreign Investment Risk—Investment in fixed-income securities or financial instruments of foreign issuers involves increased risks due to adverse issuer, political, regulatory, currency, market or economic developments as well as armed conflicts. These developments may impact the ability of a foreign debt issuer to make timely and ultimate payments on its debt obligations to the Fund or impair the Fund’s ability to enforce its rights against the foreign debt issuer. These risks are heightened in emerging or developing markets. Foreign investments may also have lower overall 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. · 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 investment objectives and/or strategies and may not produce the desired results or expected returns. · Call Risk—The risk that, during periods of falling interest rates, an issuer may call (or repay) a fixed-income security prior to maturity, resulting in a decline in the Fund’s income. · Downgrade Risk—The risk that securities are subsequently downgraded should Nuveen Asset Management and/or rating agencies believe the issuer’s business outlook or creditworthiness has deteriorated. · Non-Investment-Grade Securities Risk—Issuers of non-investment-grade securities, which are usually called “high-yield” or “junk bonds,” are typically speculative in nature, in weaker financial health and such securities can be harder to value and sell and their prices can be more volatile than more highly rated securities. While these securities generally have higher rates of interest, they also involve greater risk of default than do securities of a higher-quality rating. In times of unusual or adverse market, economic or political conditions, these securities may experience higher than normal default rates. · 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. · Emerging Markets Risk—The risks of foreign investment often increases in countries with emerging markets or those economically tied to emerging market countries. For example, these countries may have more unstable governments than developed countries, and their economies may be based on only a few industries. Emerging market countries may also have less stringent regulation of accounting, auditing, financial reporting and recordkeeping requirements. As a result, there could be less information available about issuers in emerging market countries, which could negatively affect Nuveen Asset Management’s ability to evaluate local companies or their potential impact on a Fund’s performance. Because their financial markets may be very small, share prices of financial instruments in emerging market countries may be volatile and difficult to determine. Financial instruments of issuers in these countries may have lower overall liquidity than those of issuers in more developed countries and may be more vulnerable to market manipulation. In addition, foreign investors such as a Fund are subject to a variety of special restrictions in many emerging market countries. Moreover, legal remedies for investors in emerging markets may be more limited, and U.S. authorities may have less ability to enforce certain regulatory or legal obligations or otherwise bring actions against bad actors in emerging market countries. The risks outlined above are often more pronounced in “frontier markets” in which the Fund may invest. Frontier markets are those emerging markets that are considered to be among the smallest, least mature and least liquid. These factors may make investing in frontier market countries significantly riskier than investing in other countries. · U.S. Government Securities Risk—Securities issued by the U.S. Government or one of its agencies or instrumentalities may receive varying levels of support from the U.S. Government, which could affect the Fund’s ability to recover should they default. To the extent the Fund invests significantly in securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities, any market movements, regulatory changes or changes in political or economic conditions that affect the securities of the U.S. Government or its agencies or instrumentalities in which the Fund invests may have a significant impact on the Fund’s performance. · Floating and Variable Rate Securities Risk—Floating and variable rate securities provide for a periodic adjustment in the interest rate paid on the securities. The rate adjustment intervals may be regular and range from daily up to annually, or may be based on an event, such as a change in the prime rate. Floating and variable rate securities may be subject to greater liquidity risk than other debt securities, meaning that there may be limitations on the Fund’s ability to sell the securities at any given time. Such securities also may lose value. · Derivatives Risk—The risks associated with investing in derivatives, including futures, options, swaps, forwards, and other fixed-income derivative instruments, and other similar instruments (referred to collectively as “derivatives”) may be different and greater than the risks associated with directly investing in the underlying securities and other instruments, and include leverage risk, market risk, counterparty risk, liquidity risk, operational risk and legal risk. The Fund may use more complex derivatives that might be particularly susceptible to liquidity, credit and counterparty risk. When investing in derivatives, the Fund may lose more than the principal amount invested. Derivatives used for hedging or risk management may not operate as intended, may expose the Fund to other risks, and may be insufficient to protect the Fund from the risks they were intended to hedge. · Portfolio Turnover Risk—Depending on market and other conditions, the Fund may experience high portfolio turnover, which may result in greater transactional expenses, such as brokerage commissions, bid-ask spreads, or dealer mark-ups, and capital gains (which could increase taxes and, consequently, reduce returns). 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 Class R6 of the Fund, before taxes, in each full calendar year since inception of Class R6. Because the expenses vary across share classes, the performance of Class R6 may vary from the other share classes. Below the bar chart are the best and worst returns of Class R6 for a calendar quarter during the full calendar-year periods covered by the bar chart. The performance table following the bar chart shows the Fund’s average annual total returns for Class A, Class I, Premier Class, Class R6 and Retirement Class over the applicable one-year, five-year, ten-year and since-inception periods 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. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares.The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) 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-based securities market index and benchmark index reflect no deduction for fees, expenses or taxes. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. 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. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. www.nuveen.com/performance ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)† Nuveen Short Duration and Impact Bond Fund † The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 1.09%. The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 2026-06-30 0.0109 Best quarter: 4.56%, for the quarter ended June 30, 2020. Worst quarter: -2.48%, for the quarter ended March 31, 2022. Best quarter 0.0456 2020-06-30 Worst quarter -0.0248 2022-03-31 AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † 2018-11-16 2018-11-16 2018-11-16 2018-11-16 2018-11-16 2018-11-16 2018-11-16 2018-11-16 2018-11-16 0.0591 0.0248 0.0313 0.0403 0.0104 0.0171 0.0347 0.0127 0.0179 0.0588 0.0244 0.0310 0.0575 0.0232 0.0298 0.0566 0.0223 0.0288 0.0287 0.0169 0.0247 Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes) 0.0730 -0.0036 0.0224 Bloomberg U.S. 1-3 Year Government/Credit Bond Index 0.0535 0.0197 0.0254 Current performance of the Fund’s shares may be higher or lower than that shown above. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. 800-842-2252 Nuveen Short Term Bond Fund Investment objective The Fund seeks current income. Fees and expenses The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries. SHAREHOLDER FEES (fees paid directly from your investment) 0.0250 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15.00 0 0 0 0 0 ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment) 0.0024 0.0024 0.0024 0.0024 0.0024 0.0024 0.0025 0 0.0015 0 0 0 0.0010 0.0005 0.0002 0.0002 0.0027 0.0002 0.0059 0.0029 0.0041 0.0026 0.0051 0.0026 0 0 0 0 0 -0.0026 0.0059 0.0029 0.0041 0.0026 0.0051 0.0000 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 durations noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 309 30 42 27 52 0 434 93 132 84 164 0 571 163 230 146 285 0 969 368 518 331 640 0 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 and may result in higher taxes when Fund shares are held in a taxable account. 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 March 31, 2026, the Fund’s portfolio turnover rate was 189% of the average value of its portfolio. 1.89 Principal investment strategies Under normal circumstances, the Fund invests at least 80% of its assets in U.S. Treasury and agency securities and investment-grade fixed-income investments with an average maturity or average lives of less than 5 years. The Fund primarily invests in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, U.S. Government securities, corporate bonds and mortgage-backed and other asset-backed securities. The Fund may also invest in other fixed-income securities, including those of non-investment-grade quality (usually called “high-yield” or “junk bonds”). Securities of non-investment-grade quality are speculative in nature. The Fund may also invest in securities having a variable or floating interest rate. The Fund may overweight or underweight individual securities or sectors as compared to their weight in the Fund’s benchmark index for a variety of reasons, such as when the Fund’s sub-adviser, Nuveen Asset Management, LLC (“Nuveen Asset Management”), chooses sectors or issuers that it believes offer the potential for superior returns. For purposes of the 80% investment policy, the term “assets” means net assets, plus the amount of any borrowings for investment purposes.As of May 31, 2026, the duration of the Fund’s benchmark index, the Bloomberg U.S. 1–3 Year Government/Credit Bond Index, was 1.79 years. Although the Fund may invest in fixed-income securities of any maturity, the duration of the Fund’s portfolio typically ranges between one and three years. The Fund also has a policy of maintaining a dollar weighted average maturity of portfolio holdings of no more than three years.The Fund can make foreign investments, including investments in emerging market countries and non-dollar-denominated instruments, but the Fund does not expect such investments to exceed 25% of its assets under most circumstances.The Fund may purchase and sell futures, options, swaps, forwards and other fixed-income derivative instruments to carry out the Fund’s investment strategies. In particular, the Fund may purchase and sell interest rate futures to attempt to manage duration and/or certain risks. Under normal circumstances, the Fund invests at least 80% of its assets in U.S. Treasury and agency securities and investment-grade fixed-income investments with an average maturity or average lives of less than 5 years. The Fund primarily invests in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, U.S. Government securities, corporate bonds and mortgage-backed and other asset-backed securities. The Fund may also invest in other fixed-income securities, including those of non-investment-grade quality (usually called “high-yield” or “junk bonds”). Securities of non-investment-grade quality are speculative in nature. <a href="" id="x112x2"></a>Principal investment risksYou 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: You could lose money over short or long periods by investing in this Fund. · Interest Rate Risk (a type of Market Risk)—The risk that changes in interest rates can adversely affect the value or liquidity of, and income generated by, fixed-income investments. This risk is heightened to the extent the Fund invests in longer duration fixed-income investments and during periods when prevailing interest rates are changing. There is a risk that interest rates across the financial system may change, possibly significantly and/or rapidly. In general, changing interest rates, including rates that fall below zero, or a lack of market participants may lead to decreased liquidity and increased volatility in the fixed-income or debt markets, making it more difficult for the Fund to sell fixed-income investments. When interest rates change, the values of longer duration fixed-income securities usually change more than the values of shorter duration fixed-income securities. Conversely, fixed-income securities with shorter durations or maturities will be less volatile but may provide lower returns than fixed-income securities with longer durations or maturities. Other factors that may affect the value of debt securities include, but are not limited to, economic, political, public health, and other crises and responses by governments and companies to such crises. · 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. · Credit Risk (a type of Issuer Risk)—The risk that the issuer of fixed-income investments may not be able or willing, or may be perceived (whether by market participants, rating agencies, pricing services or otherwise) as not able or willing, to meet interest or principal payments when the payments become due. Actual or perceived changes in economic, social, public health, financial or political conditions in general or that affect a particular type of investment, issuer, guarantor or counterparty can reduce the ability of the party to meet its obligations, which can affect the credit quality, liquidity and/or value of an investment. · Credit Spread Risk—The risk that credit spreads (i.e., the difference in yield between securities that is due to differences in each security’s respective credit quality) may increase when market participants believe that bonds generally have a greater risk of default, which could result in a decline in the market values of the Fund’s debt securities. · Income Volatility Risk—The risk that the level of current income from a portfolio of fixed-income investments may decline in certain interest rate environments. · Market Volatility, Liquidity and Valuation Risk (types of Market Risk)—The risk that volatile or dramatic reductions in trading activity make it difficult for the Fund to properly value its investments and that the Fund may not be able to purchase or sell an investment at an attractive price, if at all. · Fixed-Income Foreign Investment Risk—Investment in fixed-income securities or financial instruments of foreign issuers involves increased risks due to adverse issuer, political, regulatory, currency, market or economic developments as well as armed conflicts. These developments may impact the ability of a foreign debt issuer to make timely and ultimate payments on its debt obligations to the Fund or impair the Fund’s ability to enforce its rights against the foreign debt issuer. These risks are heightened in emerging or developing markets. Foreign investments may also have lower overall 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. · 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 investment objectives and/or strategies and may not produce the desired results or expected returns. · Call Risk—The risk that, during periods of falling interest rates, an issuer may call (or repay) a fixed-income security prior to maturity, resulting in a decline in the Fund’s income. · Extension Risk—The risk that, during periods of rising interest rates, borrowers may pay off their mortgage loans later than expected, preventing the Fund from reinvesting principal proceeds at higher interest rates and resulting in less income than potentially available. · Prepayment Risk—The risk that, during periods of falling interest rates, borrowers may pay off their mortgage loans sooner than expected, forcing the Fund to reinvest the unanticipated proceeds at lower interest rates and resulting in a decline in income. · Downgrade Risk—The risk that securities are subsequently downgraded should Nuveen Asset Management and/or rating agencies believe the issuer’s business outlook or creditworthiness has deteriorated. · Non-Investment-Grade Securities Risk—Issuers of non-investment-grade securities, which are usually called “high-yield” or “junk bonds,” are typically speculative in nature, in weaker financial health and such securities can be harder to value and sell and their prices can be more volatile than more highly rated securities. While these securities generally have higher rates of interest, they also involve greater risk of default than do securities of a higher-quality rating. In times of unusual or adverse market, economic or political conditions, these securities may experience higher than normal default rates. · 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. · Emerging Markets Risk—The risks of foreign investment often increases in countries with emerging markets or those economically tied to emerging market countries. For example, these countries may have more unstable governments than developed countries, and their economies may be based on only a few industries. Emerging market countries may also have less stringent regulation of accounting, auditing, financial reporting and recordkeeping requirements. As a result, there could be less information available about issuers in emerging market countries, which could negatively affect Nuveen Asset Management’s ability to evaluate local companies or their potential impact on a Fund’s performance. Because their financial markets may be very small, share prices of financial instruments in emerging market countries may be volatile and difficult to determine. Financial instruments of issuers in these countries may have lower overall liquidity than those of issuers in more developed countries and may be more vulnerable to market manipulation. In addition, foreign investors such as a Fund are subject to a variety of special restrictions in many emerging market countries. Moreover, legal remedies for investors in emerging markets may be more limited, and U.S. authorities may have less ability to enforce certain regulatory or legal obligations or otherwise bring actions against bad actors in emerging market countries. The risks outlined above are often more pronounced in “frontier markets” in which the Fund may invest. Frontier markets are those emerging markets that are considered to be among the smallest, least mature and least liquid. These factors may make investing in frontier market countries significantly riskier than investing in other countries. · U.S. Government Securities Risk—Securities issued by the U.S. Government or one of its agencies or instrumentalities may receive varying levels of support from the U.S. Government, which could affect the Fund’s ability to recover should they default. To the extent the Fund invests significantly in securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities, any market movements, regulatory changes or changes in political or economic conditions that affect the securities of the U.S. Government or its agencies or instrumentalities in which the Fund invests may have a significant impact on the Fund’s performance. · Floating and Variable Rate Securities Risk—Floating and variable rate securities provide for a periodic adjustment in the interest rate paid on the securities. The rate adjustment intervals may be regular and range from daily up to annually, or may be based on an event, such as a change in the prime rate. Floating and variable rate securities may be subject to greater liquidity risk than other debt securities, meaning that there may be limitations on the Fund’s ability to sell the securities at any given time. Such securities also may lose value. · Derivatives Risk—The risks associated with investing in derivatives, including futures, options, swaps, forwards, and other fixed-income derivative instruments, and other similar instruments (referred to collectively as “derivatives”) may be different and greater than the risks associated with directly investing in the underlying securities and other instruments, and include leverage risk, market risk, counterparty risk, liquidity risk, operational risk and legal risk. The Fund may use more complex derivatives that might be particularly susceptible to liquidity, credit and counterparty risk. When investing in derivatives, the Fund may lose more than the principal amount invested. Derivatives used for hedging or risk management may not operate as intended, may expose the Fund to other risks, and may be insufficient to protect the Fund from the risks they were intended to hedge. · Portfolio Turnover Risk—Depending on market and other conditions, the Fund may experience high portfolio turnover, which may result in greater transactional expenses, such as brokerage commissions, bid-ask spreads, or dealer mark-ups, and capital gains (which could increase taxes and, consequently, reduce returns). 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 Class R6 of the Fund, before taxes, in each full calendar year for the last ten years. Because the expenses vary across share classes, the performance of Class R6 may vary from the other share classes. Below the bar chart are the best and worst returns of Class R6 for a calendar quarter during the full calendar-year periods covered by the bar chart. The performance table following the bar chart shows the Fund’s average annual total returns for Class A, Class I, Premier Class, Class R6, Retirement Class and Class W over the applicable one-year, five-year, ten-year and since-inception periods 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. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares.The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) 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-based securities market index and benchmark index reflect no deduction for fees, expenses or taxes. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. 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. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. www.nuveen.com/performance ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)† Nuveen Short Term Bond Fund † The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 1.15%. The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 2026-06-30 0.0115 Best quarter: 2.92%, for the quarter ended September 30, 2024. Worst quarter: -2.00%, for the quarter ended March 31, 2022. Best quarter 0.0292 2024-09-30 Worst quarter -0.0200 2022-03-31 AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † 2018-09-28 2018-09-28 2018-09-28 0.0590 0.0272 0.0268 0.0403 0.0137 0.0154 0.0346 0.0149 0.0156 0.0586 0.0264 0.0260 0.0574 0.0255 0.0252 0.0564 0.0247 0.0243 0.0290 0.0187 0.0210 0.0607 0.0297 0.0331 Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes) 0.0730 -0.0036 0.0201 0.0214 Bloomberg U.S. 1-3 Year Government/Credit Bond Index 0.0535 0.0197 0.0209 0.0253 Current performance of the Fund’s shares may be higher or lower than that shown above. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. 800-842-2252 Nuveen Short Term Bond Index Fund Investment objective The Fund seeks total return that corresponds with the total return of a short-term U.S. investment-grade bond market index. Fees and expenses The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or other Nuveen mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “How You Can Buy and Sell Shares” on page 173 of the Fund’s Prospectus and “Purchase and Redemption of Fund Shares” on page 106 of the Fund’s Statement of Additional Information. In addition, more information about sales charge discounts and waivers for purchases of shares through specific financial intermediaries is set forth in the appendix to the Fund’s Prospectus entitled “Variations in Sales Charge Reductions and Waivers Available Through Certain Intermediaries. SHAREHOLDER FEES (fees paid directly from your investment) 0.0250 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15.00 0 0 0 0 0 ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment) 0.0005 0.0005 0.0005 0.0005 0.0005 0.0005 0.0025 0 0.0015 0 0 0 0.0009 0.0014 0.0004 0.0002 0.0027 0.0002 0.0039 0.0019 0.0024 0.0007 0.0032 0.0007 0 0 0 0 0 -0.0007 0.0039 0.0019 0.0024 0.0007 0.0032 0.0000 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 durations noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 289 19 25 7 33 0 372 61 77 23 103 0 463 107 135 40 180 0 730 243 306 90 406 0 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 and may result in higher taxes when Fund shares are held in a taxable account. 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 March 31, 2026, the Fund’s portfolio turnover rate was 63% of the average value of its portfolio. 0.63 Principal investment strategies Under normal circumstances, the Fund invests at least 80% of its assets in bonds within its benchmark and portfolio tracking index, the Bloomberg U.S. 1–3 Year Government/Credit Bond Index (the “Index”). The Fund uses a sampling technique to create a portfolio that closely matches the overall investment characteristics of the Index (for example, duration, sector diversification and credit quality) without investing in all of the securities in the Index. At times the Fund may purchase securities not held in the Index, but which Nuveen Asset Management, LLC (“Nuveen Asset Management”), the Fund’s sub-adviser, believes have similar investment characteristics to securities held in its index. Generally, the Fund intends to invest in a wide spectrum of public, investment-grade, taxable debt securities denominated in U.S. dollars including United States treasury debt, government-related debt, and corporate issues. The Fund has a policy of maintaining a dollar weighted average maturity of no more than three years. For purposes of the 80% investment policy, the term “assets” means net assets, plus the amount of any borrowings for investment purposes.The securities purchased by the Fund will mainly be high-quality instruments rated in the top four credit categories by a nationally recognized statistical rating organization (“NRSRO”) or deemed to be of the same quality by Nuveen Asset Management using its own credit quality analysis. The Fund may continue to hold instruments that were rated as high-quality when purchased, but which subsequently are downgraded to below-investment-grade status or have their ratings withdrawn by one or more rating agencies.Because the return of the Index is not reduced by investment and other operating expenses, the Fund’s ability to match the Index is negatively affected by the costs of buying and selling securities, as well as other fees and expenses. The use of this index by the Fund is not a fundamental policy of the Fund and may be changed without shareholder approval.The Fund may also invest in foreign securities, including emerging markets fixed-income securities and non-dollar-denominated instruments. Under most circumstances, the Fund’s investments in fixed-income securities of foreign issuers constitute less than 20% of the Fund’s assets.The Fund is classified as a diversified investment company, as defined under the Investment Company Act of 1940, as amended (the “1940 Act”). However, the Fund may become non-diversified under the 1940 Act without the approval of Fund shareholders solely as a result of a change in relative market capitalization or index weighting of one or more constituents of its benchmark index, the Bloomberg U.S. 1–3 Year Government/Credit Bond Index, which the Fund seeks to track. Under normal circumstances, the Fund invests at least 80% of its assets in bonds within its benchmark and portfolio tracking index, the Bloomberg U.S. 1–3 Year Government/Credit Bond Index (the “Index”). The Fund uses a sampling technique to create a portfolio that closely matches the overall investment characteristics of the Index (for example, duration, sector diversification and credit quality) without investing in all of the securities in the Index. At times the Fund may purchase securities not held in the Index, but which Nuveen Asset Management, LLC (“Nuveen Asset Management”), the Fund’s sub-adviser, believes have similar investment characteristics to securities held in its index. Generally, the Fund intends to invest in a wide spectrum of public, investment-grade, taxable debt securities denominated in U.S. dollars including United States treasury debt, government-related debt, and corporate issues. The Fund has a policy of maintaining a dollar weighted average maturity of no more than three years. For purposes of the 80% investment policy, the term “assets” means net assets, plus the amount of any borrowings for investment purposes. <a href="" id="x125x2"></a>Principal investment risksYou 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: You could lose money over short or long periods by investing in this Fund. · Income Volatility Risk—The risk that the level of current income from a portfolio of fixed-income investments may decline in certain interest rate environments. · Credit Risk (a type of Issuer Risk)—The risk that the issuer of fixed-income investments may not be able or willing, or may be perceived (whether by market participants, rating agencies, pricing services or otherwise) as not able or willing, to meet interest or principal payments when the payments become due. Actual or perceived changes in economic, social, public health, financial or political conditions in general or that affect a particular type of investment, issuer, guarantor or counterparty can reduce the ability of the party to meet its obligations, which can affect the credit quality, liquidity and/or value of an investment. · Credit Spread Risk—The risk that credit spreads (i.e., the difference in yield between securities that is due to differences in each security’s respective credit quality) may increase when market participants believe that bonds generally have a greater risk of default, which could result in a decline in the market values of the Fund’s debt securities. · Call Risk—The risk that, during periods of falling interest rates, an issuer may call (or repay) a fixed-income security prior to maturity, resulting in a decline in the Fund’s income. · Market Volatility, Liquidity and Valuation Risk (types of Market Risk)—The risk that volatile or dramatic reductions in trading activity make it difficult for the Fund to properly value its investments and that the Fund may not be able to purchase or sell an investment at an attractive price, if at all. · Interest Rate Risk (a type of Market Risk)—The risk that changes in interest rates can adversely affect the value or liquidity of, and income generated by, fixed-income investments. This risk is heightened to the extent the Fund invests in longer duration fixed-income investments and during periods when prevailing interest rates are changing. There is a risk that interest rates across the financial system may change, possibly significantly and/or rapidly. In general, changing interest rates, including rates that fall below zero, or a lack of market participants may lead to decreased liquidity and increased volatility in the fixed-income or debt markets, making it more difficult for the Fund to sell fixed-income investments. When interest rates change, the values of longer duration fixed-income securities usually change more than the values of shorter duration fixed-income securities. Conversely, fixed-income securities with shorter durations or maturities will be less volatile but may provide lower returns than fixed-income securities with longer durations or maturities. Other factors that may affect the value of debt securities include, but are not limited to, economic, political, public health, and other crises and responses by governments and companies to such crises. · 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. · U.S. Government Securities Risk—Securities issued by the U.S. Government or one of its agencies or instrumentalities may receive varying levels of support from the U.S. Government, which could affect the Fund’s ability to recover should they default. To the extent the Fund invests significantly in securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities, any market movements, regulatory changes or changes in political or economic conditions that affect the securities of the U.S. Government or its agencies or instrumentalities in which the Fund invests may have a significant impact on the Fund’s performance. · 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. · Downgrade Risk—The risk that securities are subsequently downgraded should Nuveen Asset Management and/or rating agencies believe the issuer’s business outlook or creditworthiness has deteriorated. · Index Risk—The risk that the Fund’s performance may not correspond to its benchmark index for any period of time and may underperform such index or the overall financial market. Additionally, to the extent that the Fund’s investments vary from the composition of its benchmark index, the Fund’s performance could potentially vary from the index’s performance to a greater extent than if the Fund merely attempted to replicate the index. · Fixed-Income Foreign Investment Risk—Investment in fixed-income securities or financial instruments of foreign issuers involves increased risks due to adverse issuer, political, regulatory, currency, market or economic developments as well as armed conflicts. These developments may impact the ability of a foreign debt issuer to make timely and ultimate payments on its debt obligations to the Fund or impair the Fund’s ability to enforce its rights against the foreign debt issuer. These risks are heightened in emerging or developing markets. Foreign investments may also have lower overall 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. · Emerging Markets Risk—The risks of foreign investment often increases in countries with emerging markets or those economically tied to emerging market countries. For example, these countries may have more unstable governments than developed countries, and their economies may be based on only a few industries. Emerging market countries may also have less stringent regulation of accounting, auditing, financial reporting and recordkeeping requirements. As a result, there could be less information available about issuers in emerging market countries, which could negatively affect Nuveen Asset Management’s ability to evaluate local companies or their potential impact on a Fund’s performance. Because their financial markets may be very small, share prices of financial instruments in emerging market countries may be volatile and difficult to determine. Financial instruments of issuers in these countries may have lower overall liquidity than those of issuers in more developed countries and may be more vulnerable to market manipulation. In addition, foreign investors such as a Fund are subject to a variety of special restrictions in many emerging market countries. Moreover, legal remedies for investors in emerging markets may be more limited, and U.S. authorities may have less ability to enforce certain regulatory or legal obligations or otherwise bring actions against bad actors in emerging market countries. The risks outlined above are often more pronounced in “frontier markets” in which the Fund may invest. Frontier markets are those emerging markets that are considered to be among the smallest, least mature and least liquid. These factors may make investing in frontier market countries significantly riskier than investing in other countries. · Non-Diversification Risk—While the Fund is considered to be a diversified investment company under the 1940 Act, the Fund may become non-diversified under the 1940 Act without Fund shareholder approval when necessary to continue to track its benchmark index. Non-diversified status means that the Fund can invest a greater percentage of its assets in the securities of a single issuer than a diversified fund. Investing in a non-diversified fund involves greater risk than investing in a diversified fund because a loss in value of a particular investment may have a greater effect on the fund’s return since that investment may represent a larger portion of the fund’s total portfolio assets. 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 Class R6 of the Fund, before taxes, in each full calendar year since inception of Class R6. Because the expenses vary across share classes, the performance of Class R6 may vary from the other share classes. Below the bar chart are the best and worst returns of Class R6 for a calendar quarter during the full calendar-year periods covered by the bar chart. The performance table following the bar chart shows the Fund’s average annual total returns for Class A, Class I, Premier Class, Class R6, Retirement Class and Class W over the applicable one-year, five-year, ten-year and since-inception periods 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. After-tax performance is shown only for Class R6 shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Class R6 shares. The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) 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-based securities market index and benchmark index reflect no deduction for fees, expenses or taxes. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. 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. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. www.nuveen.com/performance ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)† Nuveen Short Term Bond Index Fund † The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 0.72%. The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 2026-06-30 0.0072 Best quarter: 3.01%, for the quarter ended September 30, 2024. Worst quarter: -2.47%, for the quarter ended March 31, 2022. Best quarter 0.0301 2024-09-30 Worst quarter -0.0247 2022-03-31 AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † 2018-09-28 2018-09-28 2018-09-28 0.0530 0.0193 0.0199 0.0350 0.0079 0.0107 0.0311 0.0098 0.0113 0.0516 0.0178 0.0187 0.0512 0.0176 0.0182 0.0503 0.0167 0.0174 0.0229 0.0106 0.0139 0.0536 0.0201 0.0256 Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes) 0.0730 -0.0036 0.0201 0.0214 Bloomberg U.S. 1-3 Year Government/Credit Bond Index 0.0535 0.0197 0.0209 0.0253 Current performance of the Fund’s shares may be higher or lower than that shown above. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect during the periods shown and do not reflect the impact of state and local taxes. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(a), 401(k) or 403(b) plans or Individual Retirement Accounts (IRAs). After-tax returns are shown for only one class, and after-tax returns for other classes will vary. 800-842-2252 Nuveen Money Market Fund Investment objective The Fund seeks current income consistent with maintaining liquidity and preserving capital. Fees and expenses The following tables describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, when buying or selling shares of the Fund, which are not reflected in the tables and examples below. SHAREHOLDER FEES (fees paid directly from your investment) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15.00 0 0 0 0 0 ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment) 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0025 0 0.0015 0 0 0 0.0010 0.0005 0.0002 0.0002 0.0027 0.0002 0.0045 0.0015 0.0027 0.0012 0.0037 0.0012 0 0 0 0 0 -0.0012 0.0045 0.0015 0.0027 0.0012 0.0037 0.0000 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 durations noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 46 15 28 12 38 0 144 48 87 39 119 0 252 85 152 68 208 0 567 192 343 154 468 0 Principal investment strategies The Fund is a “government money market fund,” as defined in the applicable rules governing money market funds, and as such invests at least 99.5% of its total assets in cash, U.S. Government securities and/or repurchase agreements that are collateralized fully by cash or U.S. Government securities. These investments include (1) securities issued by, or whose principal and interest are guaranteed by, the U.S. Government or one of its agencies or instrumentalities and (2) repurchase agreements involving securities issued or guaranteed by the U.S. Government or one of its agencies or instrumentalities. Short-term, U.S. Government securities generally pay interest that is among the lowest for income-paying securities. Because of this, the yield on the Fund will likely be lower than the yields on funds that invest in longer-term or lower-quality securities. The Fund’s investments may include securities having a variable or floating interest rate.Generally, the Fund seeks to maintain a share value of $1.00 per share. The Fund’s investments will be made in accordance with the applicable rules governing the quality, maturity and diversification of securities and other instruments held by money market funds. The Fund maintains a dollar-weighted average maturity of 60 days or less and a dollar-weighted average life to maturity of 120 days or less, and invests in debt obligations with a remaining maturity of 397 days or less.Nuveen Asset Management, LLC (“Nuveen Asset Management”), the Fund’s sub-adviser, limits the Fund’s investments to U.S. Government securities or securities that present minimal credit risks to the Fund and are of eligible quality.A government money market fund is not required to impose liquidity fees, and the Fund does not currently intend to impose such fees. However, the Fund’s Board of Trustees of the Trust (“Board of Trustees”) could elect to subject the Fund to such fees in the future.The above list of investments is not exclusive and the Fund may make other investments consistent with its investment objective and policies. <a href="" id="x137x2"></a>Principal investment risksYou could lose money by investing in this Fund. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. An investment in the Fund is not a bank account and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The Fund’s sponsor is not required to reimburse the Fund for losses, and you should not expect that the sponsor will provide financial support to the Fund at any time, including during periods of market stress. An investment in the Fund, due to the nature of the Fund’s portfolio holdings, typically is subject to the following principal investment risks: You could lose money by investing in this Fund. · Current Income Risk—The risk that the income the Fund receives may fall as a result of a decline in interest rates. In a low or negative interest rate environment, the Fund may not be able to achieve a positive or zero yield or maintain a stable net asset value (“NAV”) of $1.00 per share. · 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. · Credit Risk (a type of Issuer Risk)—The risk that the issuer of fixed-income investments may not be able or willing, or may be perceived (whether by market participants, rating agencies, pricing services or otherwise) as not able or willing, to meet interest or principal payments when the payments become due. Actual or perceived changes in economic, social, public health, financial or political conditions in general or that affect a particular type of investment, issuer, guarantor or counterparty can reduce the ability of the party to meet its obligations, which can affect the credit quality, liquidity and/or value of an investment. · Market Volatility, Liquidity and Valuation Risk (types of Market Risk)—The risk that volatile or dramatic reductions in trading activity make it difficult for the Fund to properly value its investments and that the Fund may not be able to purchase or sell an investment at an attractive price, if at all. · Income Volatility Risk—The risk that the level of current income from a portfolio of fixed-income investments may decline in certain interest rate environments. · Interest Rate Risk (a type of Market Risk)—The risk that changes in interest rates can adversely affect the value or liquidity of, and income generated by, fixed-income investments. This risk is heightened to the extent the Fund invests in longer duration fixed-income investments and during periods when prevailing interest rates are changing. There is a risk that interest rates across the financial system may change, possibly significantly and/or rapidly. In general, changing interest rates, including rates that fall below zero, or a lack of market participants may lead to decreased liquidity and increased volatility in the fixed-income or debt markets, making it more difficult for the Fund to sell fixed-income investments. When interest rates change, the values of longer duration fixed-income securities usually change more than the values of shorter duration fixed-income securities. Conversely, fixed-income securities with shorter durations or maturities will be less volatile but may provide lower returns than fixed-income securities with longer durations or maturities. Other factors that may affect the value of debt securities include, but are not limited to, economic, political, public health, and other crises and responses by governments and companies to such crises. · U.S. Government Securities Risk—Securities issued by the U.S. Government or one of its agencies or instrumentalities may receive varying levels of support from the U.S. Government, which could affect the Fund’s ability to recover should they default. To the extent the Fund invests significantly in securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities, any market movements, regulatory changes or changes in political or economic conditions that affect the securities of the U.S. Government or its agencies or instrumentalities in which the Fund invests may have a significant impact on the Fund’s performance. · Floating and Variable Rate Securities Risk—Floating and variable rate securities provide for a periodic adjustment in the interest rate paid on the securities. The rate adjustment intervals may be regular and range from daily up to annually, or may be based on an event, such as a change in the prime rate. Floating and variable rate securities may be subject to greater liquidity risk than other debt securities, meaning that there may be limitations on the Fund’s ability to sell the securities at any given time. Such securities also may lose value. · 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 peer group average or mutual funds with similar investment objectives and/or strategies and may not produce the desired results or expected returns. 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 Class R6 of the Fund in each full calendar year for the last ten years. Because the expenses vary across share classes, the performance of Class R6 may vary from the other share classes. Below the bar chart are the best and worst returns of Class R6 for a calendar quarter during the full calendar-year periods covered by the bar chart. The performance table following the bar chart shows the Fund’s average annual total returns for Class A, Class I, Premier Class, Class R6 and Retirement Class over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2025, and how those returns compare to those of the Fund’s peer group average. For periods prior to August 1, 2026, Teachers Advisors, LLC (“Advisors”) served as investment adviser to the Fund. The returns shown below reflect previous agreements by Advisors, the Fund’s prior investment adviser, to waive or reimburse the Fund for certain fees and expenses. Without these waivers and reimbursements, the returns of the Fund would have been lower. As of October 14, 2016, certain changes were made to the Fund’s investment strategies. Performance information prior to this date reflects the Fund’s investment strategies before this date. As a result, the Fund’s performance after October 14, 2016 may differ materially from the performance information shown below for the period prior to October 14, 2016. Past performance of the Fund is not necessarily an indication of how it will perform in the future. The peer group average listed below is unmanaged, and you cannot invest directly in the peer group average. For current performance information of each share class, including performance to the most recent month-end, please visit www.nuveen.com/performance or call 800-257-8787. 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. Past performance of the Fund is not necessarily an indication of how it will perform in the future. www.nuveen.com/performance ANNUAL TOTAL RETURNS FOR CLASS R6 SHARES (%)† Nuveen Money Market Fund † The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 1.80%. The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2026, was 2026-06-30 0.0180 Best quarter: 1.33%, for the quarter ended December 31, 2023. Worst quarter: 0.00%, for the quarter ended March 31, 2021. Best quarter 0.0133 2023-12-31 Worst quarter 0.0000 2021-03-31 AVERAGE ANNUAL TOTAL RETURNS For the Periods Ended December 31, 2025 † 0.0424 0.0317 0.0211 0.0418 0.0314 0.0209 0.0409 0.0307 0.0199 0.0398 0.0301 0.0194 0.0390 0.0292 0.0184 iMoneyNet Money Fund Averages™—All Government 0.0396 0.0298 0.0189 Current performance of the Fund’s shares may be higher or lower than that shown above. 800-842-2252 485BPOS 2026-03-31 0001084380 false 2026-07-21 2026-08-01 N-1A ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData row dei_DocumentInformationDocumentAxis compact cik0001084380_S000026500Summary1Member row dei_LegalEntityAxis compact cik0001084380_S000026500Member ~ ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData row dei_DocumentInformationDocumentAxis compact cik0001084380_S000026500Summary1Member row dei_LegalEntityAxis compact cik0001084380_S000026500Member ~ ~ http://xbrl.sec.gov/rr/role/ExpenseExample row dei_DocumentInformationDocumentAxis compact 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cik0001084380_S000050278Summary10Member row dei_LegalEntityAxis compact cik0001084380_S000050278Member ~ ~ http://xbrl.sec.gov/rr/role/ExpenseExample row dei_DocumentInformationDocumentAxis compact cik0001084380_S000050278Summary10Member row dei_LegalEntityAxis compact cik0001084380_S000050278Member ~ ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * row dei_DocumentInformationDocumentAxis compact cik0001084380_S000050278Summary10Member row dei_LegalEntityAxis compact cik0001084380_S000050278Member row oef_ClassAxis compact * row oef_PerformanceMeasureAxis compact * ~ ~ http://xbrl.sec.gov/rr/role/ShareholderFeesData row dei_DocumentInformationDocumentAxis compact cik0001084380_S000005374Summary11Member row dei_LegalEntityAxis compact cik0001084380_S000005374Member ~ ~ http://xbrl.sec.gov/rr/role/OperatingExpensesData row dei_DocumentInformationDocumentAxis compact cik0001084380_S000005374Summary11Member row dei_LegalEntityAxis compact cik0001084380_S000005374Member ~ ~ http://xbrl.sec.gov/rr/role/ExpenseExample row dei_DocumentInformationDocumentAxis compact cik0001084380_S000005374Summary11Member row dei_LegalEntityAxis compact cik0001084380_S000005374Member ~ ~ http://xbrl.sec.gov/rr/role/PerformanceTableData column period compact * row dei_DocumentInformationDocumentAxis compact cik0001084380_S000005374Summary11Member row dei_LegalEntityAxis compact cik0001084380_S000005374Member row oef_ClassAxis compact * row oef_PerformanceMeasureAxis compact * ~ 0.0238 0.0342 -0.0002 0.0838 0.0749 -0.0181 -0.1324 0.0564 0.0143 0.0711 0.0421 0.0447 -0.0038 0.0935 0.0787 -0.0096 -0.1324 0.0634 0.0266 0.0736 0.0319 0.0451 0.0033 0.0873 0.0745 -0.0103 -0.1401 0.0604 0.0256 0.075 0.0466 0.0481 -0.0025 0.0947 0.0798 -0.0033 -0.1332 0.0703 0.0311 0.0734 -0.008 0.0491 0.0164 0.0784 0.0433 0.0131 -0.0905 0.0608 0.0078 0.0475 0.0892 0.0859 -0.006 -0.1298 0.0644 0.0306 0.0674 0.1645 0.0565 -0.0266 0.1621 0.0223 0.0479 -0.0983 0.1302 0.0789 0.0839 0.0506 0.0461 0.0022 -0.0379 0.0521 0.0521 0.0591 0.0207 0.0188 0.0146 0.0425 0.0357 0.0018 -0.0289 0.0541 0.0531 0.059 0.0098 0.0069 0.0149 0.0389 0.0328 -0.0057 -0.0378 0.0462 0.0439 0.053 0.0029 0.0075 0.0172 0.0211 0.0044 0 0.0148 0.0505 0.0519 0.0424 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 Restated to reflect estimate for the current fiscal year. July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2028 July 31, 2028 July 31, 2028 July 31, 2028 July 31, 2028 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2028 July 31, 2028 July 31, 2028 July 31, 2028 July 31, 2028 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 July 31, 2027 Estimate is for the current fiscal year. ~ http://TIAA.com/20260331/role/RRRiskTable3 ~ ~ http://TIAA.com/20260331/role/RRRiskTable5 ~ ~ http://TIAA.com/20260331/role/RRRiskTable7 ~ ~ http://TIAA.com/20260331/role/RRRiskTable9 ~ ~ http://TIAA.com/20260331/role/RRRiskTable11 ~ ~ http://TIAA.com/20260331/role/RRRiskTable13 ~ ~ http://TIAA.com/20260331/role/RRRiskTable15 ~ ~ http://TIAA.com/20260331/role/RRRiskTable17 ~ ~ http://TIAA.com/20260331/role/RRRiskTable19 ~ ~ http://TIAA.com/20260331/role/RRRiskTable21 ~ ~ http://TIAA.com/20260331/role/RRRiskTable23 ~ Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.44% of average daily net assets for Class A shares; (ii) 0.24% of average daily net assets for Class I shares; (iii) 0.24% of average daily net assets for Premier Class shares; (iv) 0.09% of average daily net assets for Class R6 shares; (v) 0.34% of average daily net assets for Retirement Class shares; and (vi) 0.09% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2027, unless changed with approval of the Board of Trustees. Nuveen Fund Advisors has contractually agreed to waive and/or reimburse Class W’s Management fees and Other expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses, Trustee expenses and extraordinary expenses) in their entirety. Nuveen Fund Advisors expects these waiver and/or reimbursement arrangements to remain in effect indefinitely, unless changed or terminated with approval of the Board of Trustees. The Class A average annual total returns have been restated to reflect a maximum up-front sales charge of 3.75% applicable to the purchase of Class A shares, which was effective as of May 6, 2024. Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.70% of average daily net assets for Class A shares; (ii) 0.50% of average daily net assets for Class I shares; (iii) 0.50% of average daily net assets for Premier Class shares; (iv) 0.35% of average daily net assets for Class R6 shares; (v) 0.60% of average daily net assets for Retirement Class shares; and (vi) 0.35% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2027, unless changed with approval of the Board of Trustees. Nuveen Fund Advisors has contractually agreed to waive and/or reimburse Class W’s Management fees and Other expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses, Trustee expenses and extraordinary expenses) in their entirety. Nuveen Fund Advisors expects these waiver and/or reimbursement arrangements to remain in effect indefinitely, unless changed or terminated with approval of the Board of Trustees. The Class A average annual total returns have been restated to reflect a maximum up-front sales charge of 3.75% applicable to the purchase of Class A shares, which was effective as of May 6, 2024. Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.75% of average daily net assets for Class A shares; (ii) 0.55% of average daily net assets for Class I shares; (iii) 0.55% of average daily net assets for Premier Class shares; (iv) 0.40% of average daily net assets for Class R6 shares; and (v) 0.65% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2027, unless changed with approval of the Board of Trustees. The Class A average annual total returns have been restated to reflect a maximum up-front sales charge of 3.75% applicable to the purchase of Class A shares, which was effective as of May 6, 2024. Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.70% of average daily net assets for Class A shares; (ii) 0.50% of average daily net assets for Class I shares; (iii) 0.50% of average daily net assets for Premier Class shares; (iv) 0.35% of average daily net assets for Class R6 shares; (v) 0.60% of average daily net assets for Retirement Class shares; and (vi) 0.35% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2027, unless changed with approval of the Board of Trustees. Nuveen Fund Advisors has contractually agreed to waive and/or reimburse Class W’s Management fees and Other expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses, Trustee expenses and extraordinary expenses) in their entirety. Nuveen Fund Advisors expects these waiver and/or reimbursement arrangements to remain in effect indefinitely, unless changed or terminated with approval of the Board of Trustees. The Class A average annual total returns have been restated to reflect a maximum up-front sales charge of 3.75% applicable to the purchase of Class A shares, which was effective as of May 6, 2024. Restated to reflect estimate for the current fiscal year. Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.65% of average daily net assets for Class A shares; (ii) 0.45% of average daily net assets for Class I shares; and (iii) 0.30% of average daily net assets for Class R6 shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2027, unless changed with approval of the Board of Trustees. The Class A average annual total returns have been restated to reflect a maximum up-front sales charge of 3.00% applicable to the purchase of Class A shares, which was effective as of May 6, 2024. Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.80% of average daily net assets for Class A shares; (ii) 0.60% of average daily net assets for Class I shares; (iii) 0.60% of average daily net assets for Premier Class shares; (iv) 0.45% of average daily net assets for Class R6 shares; and (v) 0.70% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2028, unless changed with approval of the Board of Trustees. Nuveen Fund Advisors, LLC has also agreed to waive fees and/or reimburse expenses to reduce the maximum Total annual operating expenses detailed above for each class of the Fund by 0.03%. This waiver and/or reimbursement arrangement may be terminated or modified prior to July 31, 2028 only with approval of the Board of Trustees. The Class A average annual total returns have been restated to reflect a maximum up-front sales charge of 3.75% applicable to the purchase of Class A shares, which was effective as of May 6, 2024. Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.75% of average daily net assets for Class A shares; (ii) 0.55% of average daily net assets for Class I shares; (iii) 0.55% of average daily net assets for Premier Class shares; (iv) 0.40% of average daily net assets for Class R6 shares; (v) 0.65% of average daily net assets for Retirement Class shares; and (vi) 0.40% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2027, unless changed with approval of the Board of Trustees. Nuveen Fund Advisors has contractually agreed to waive and/or reimburse Class W’s Management fees and Other expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses, Trustee expenses and extraordinary expenses) in their entirety. Nuveen Fund Advisors expects these waiver and/or reimbursement arrangements to remain in effect indefinitely, unless changed or terminated with approval of the Board of Trustees. The Class A average annual total returns have been restated to reflect a maximum up-front sales charge of 4.75% applicable to the purchase of Class A shares, which was effective as of May 6, 2024. Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.70% of average daily net assets for Class A shares; (ii) 0.50% of average daily net assets for Class I shares; (iii) 0.50% of average daily net assets for Premier Class shares; (iv) 0.35% of average daily net assets for Class R6 shares; and (v) 0.60% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2028, unless changed with approval of the Board of Trustees. Nuveen Fund Advisors, LLC has also agreed to waive fees and/or reimburse expenses to reduce the maximum Total annual operating expenses detailed above for each class of the Fund by 0.01%. This waiver and/or reimbursement arrangement may be terminated or modified prior to July 31, 2028 only with approval of the Board of Trustees. The Class A average annual total returns have been restated to reflect a maximum up-front sales charge of 2.50% applicable to the purchase of Class A shares, which was effective as of May 6, 2024. Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.65% of average daily net assets for Class A shares; (ii) 0.45% of average daily net assets for Class I shares; (iii) 0.45% of average daily net assets for Premier Class shares; (iv) 0.30% of average daily net assets for Class R6 shares; (v) 0.55% of average daily net assets for Retirement Class shares; and (vi) 0.30% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2027, unless changed with approval of the Board of Trustees. Nuveen Fund Advisors has contractually agreed to waive and/or reimburse Class W’s Management fees and Other expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses, Trustee expenses and extraordinary expenses) in their entirety. Nuveen Fund Advisors expects these waiver and/or reimbursement arrangements to remain in effect indefinitely, unless changed or terminated with approval of the Board of Trustees. The Class A average annual total returns have been restated to reflect a maximum up-front sales charge of 2.50% applicable to the purchase of Class A shares, which was effective as of May 6, 2024. Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.45% of average daily net assets for Class A shares; (ii) 0.25% of average daily net assets for Class I shares; (iii) 0.25% of average daily net assets for Premier Class shares; (iv) 0.10% of average daily net assets for Class R6 shares; (v) 0.35% of average daily net assets for Retirement Class shares; and (vi) 0.10% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2027, unless changed with approval of the Board of Trustees. Nuveen Fund Advisors has contractually agreed to waive and/or reimburse Class W’s Management fees and Other expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses, Trustee expenses and extraordinary expenses) in their entirety. Nuveen Fund Advisors expects these waiver and/or reimbursement arrangements to remain in effect indefinitely, unless changed or terminated with approval of the Board of Trustees. The Class A average annual total returns have been restated to reflect a maximum up-front sales charge of 2.50% applicable to the purchase of Class A shares, which was effective as of May 6, 2024. Estimate is for the current fiscal year. Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Nuveen Fund Advisors, LLC (“Nuveen Fund Advisors”), has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.50% of average daily net assets for Class A shares; (ii) 0.30% of average daily net assets for Class I shares; (iii) 0.30% of average daily net assets for Premier Class shares; (iv) 0.15% of average daily net assets for Class R6 shares; (v) 0.40% of average daily net assets for Retirement Class shares; and (vi) 0.15% of average daily net assets for Class W shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2027, unless changed with approval of the Board of Trustees. Nuveen Fund Advisors has contractually agreed to waive and/or reimburse Class W’s Management fees and Other expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses, Trustee expenses and extraordinary expenses) in their entirety. Nuveen Fund Advisors expects these waiver and/or reimbursement arrangements to remain in effect indefinitely, unless changed or terminated with approval of the Board of Trustees. Part or all of the Rule 12b-1 distribution fee of Class A and Premier Classes and the service fee of the Retirement Class were being voluntarily waived in order to keep the yield of these classes at a minimum of zero.