Mutual
Funds Summary Prospectus

Nuveen Lifecycle Index 2045 Fund

(formerly TIAA-CREF Lifecycle Index 2045 Fund)

OCTOBER 1, 2024

Class:	Class I	Premier	Class R6	Retirement
Ticker:	TLMHX	TLMPX	TLXIX	TLMRX

This summary prospectus is designed to provide investors with key Fund information in a clear and concise format. Before you invest, you may want to review the Fund’s complete prospectus, which contains more information about the Fund and its risks. You can find the Fund’s prospectus, reports to shareholders and other information about the Fund online at www.nuveen.com/prospectus. You can also get this information at no cost by calling 800-257-8787 or by sending an e-mail request to mutualfunds@nuveen.com. If you purchase shares of the Fund through a broker-dealer or other financial intermediary (such as a bank), the prospectus, reports to shareholders and other information will also be available from your financial intermediary. The Fund’s prospectus and statement of additional information, both dated October 1, 2024, are incorporated by reference into this summary prospectus and may be obtained, free of charge, at the website, phone number or e-mail address noted above.

Investment objective

The Fund seeks high total return over time through a combination of capital appreciation and 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.

The tables and examples below do not reflect any commissions that shareholders may be required to pay directly to their financial intermediaries when buying or selling Class I shares.

Nuveen Lifecycle Index 2045 Fund ■Summary Prospectus     1

SHAREHOLDER FEES (fees paid directly from your investment)

	Class I	Premier Class	Class R6	Retirement Class
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	0%	0%	0%	0%
Maximum deferred sales charge (load)	0%	0%	0%	0%
Maximum sales charge (load) imposed on reinvested dividends and other distributions	0%	0%	0%	0%
Redemption or exchange fee	0%	0%	0%	0%
Maximum account fee	0%	0%	0%	0%

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

		Class I	Premier Class	Class R6	Retirement Class
Management fees1,2		0.15%	0.15%	0.15%	0.15%
Distribution (Rule 12b-1) fees		—	0.15%	—	—
Other expenses1,2		0.12%	0.02%	0.02%	0.27%
Total annual Fund operating expenses		0.27%	0.32%	0.17%	0.42%
Waivers and expense reimbursements3,4		(0.07)%	(0.07)%	(0.07)%	(0.07)%
Total annual Fund operating expenses after fee   waiver and/or expense reimbursement		0.20%	0.25%	0.10%	0.35%
1	Restated to reflect estimate for the current fiscal year.
2	Portions of the Management fees and Other expenses are based on expenses originally incurred by Class W shares of the Underlying Funds (as defined below) of the Trust, which have been incurred directly by the Fund pursuant to certain contractual arrangements intended to reallocate directly to the Fund certain fees and expenses that had been paid by the Underlying Funds of the Trust. For additional information, please see the “Management of the Funds” section of this Prospectus.
3	Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Teachers Advisors, LLC (“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, extraordinary expenses and any expenses originally attributable to Class W shares of the Underlying Funds of the Trust that were incurred directly by the Fund) that exceed: (i) 0.193% of average daily net assets for Class I shares; (ii) 0.193% of average daily net assets for Premier Class shares; (iii) 0.043% of average daily net assets for Class R6 shares; and (iv) 0.293% of average daily net assets for Retirement Class shares of the Fund. These expense reimbursement arrangements will continue through at least September 30, 2025, unless changed with approval of the Board of Trustees.
4	Advisors has contractually agreed to waive 0.057% of the Fund’s Management fee. This waiver will remain in effect through at least September 30, 2025, unless changed with the approval of the Board of Trustees.

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

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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:

	Class I		Premier Class		Class R6		Retirement Class
1 year	$	20	$	26	$	10	$	36
3 years	$	80	$	96	$	48	$	128
5 years	$	145	$	173	$	89	$	228
10 years	$	336	$	399	$	210	$	523

Portfolio turnover

The Fund pays transaction costs, such as commissions, 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 May 31, 2024, the Fund’s portfolio turnover rate was 8% of the average value of its portfolio.

Principal investment strategies

The Fund is a “fund of funds” that invests in Class W shares of other Nuveen mutual funds and potentially in other investment pools or investment products, including other funds advised by the Fund’s investment adviser, Teachers Advisors, LLC (“Advisors”), or its affiliates (collectively, the “Underlying Funds”). In general, the Fund is designed for investors who have an approximate target retirement year in mind, and the Fund’s investments are adjusted from more aggressive to more conservative over time as the Fund’s target retirement year approaches and for approximately 30 years afterwards. The Fund invests in Underlying Funds according to an asset allocation strategy designed for investors retiring in, or planning to retire within a few years of, 2045 and who may begin taking systematic withdrawals upon retirement. The Fund has a policy of investing at least 80% of its assets (net assets, plus the amount of any borrowings for investment purposes) in Underlying Funds that are managed to seek investment returns that track particular market indices.

Advisors currently expects to allocate approximately 86.00% of the Fund’s assets to equity Underlying Funds and 14.00% of its assets to fixed-income Underlying Funds. These allocations represent targets for equity and fixed-income asset classes. Target allocations will change over time and actual allocations may vary up to ten percentage points from the targets. The target allocations along the investment glidepath, illustrated in the chart below, gradually become more conservative, moving to target allocations of approximately 50.00% equity/50.00% fixed-income in the Fund’s target retirement year of 2045 and reaching the Fund’s final target allocation of approximately 20.00%

Nuveen Lifecycle Index 2045 Fund ■Summary Prospectus     3

equity/80.00% fixed-income in 2075. Within the equity and fixed-income asset classes, Advisors allocates the Fund’s investments to particular market sectors (U.S. equity, international equity, fixed-income, short-term fixed-income and inflation-protected assets) represented by various Underlying Funds. These market sector allocations may vary by up to 10% from the Fund’s target market sector allocations. The Fund’s current target market sector allocations for June 30, 2025, which will change over time, are approximately as follows: U.S. Equity: 55.90%; International Equity: 30.10%; Fixed-Income: 14.00%; Short-Term Fixed-Income: 0.00%; and Inflation-Protected Assets: 0.00%. The asset class and market sector names used herein are intended to reflect the primary type of investment of the Underlying Funds within each of these categories.

The Fund’s target market sector allocations to Underlying Funds may include the Nuveen Equity Index Fund (U.S. Equity); Nuveen Emerging Markets Equity Index Fund and Nuveen International Equity Index Fund (International Equity); Nuveen Bond Index Fund (Fixed-Income); Nuveen Short Term Bond Index Fund (Short-Term Fixed-Income); and Nuveen Inflation Linked Bond Fund (Inflation-Protected Assets).

As a result of its investments in the Underlying Funds, the Fund’s returns will reflect investments in a mix of domestic and foreign equities of companies of various sizes and market capitalizations and a variety of domestic and foreign fixed-income instruments of private and governmental issuers of varying maturities and credit qualities.

Additional or replacement Underlying Funds for each market sector, as well as additional or replacement market sectors, may be included when making future allocations if Advisors believes that such Underlying Funds and/or market sectors are appropriate in light of the Fund’s desired levels of risk and potential return at the particular time. The Fund’s portfolio management team may also add a new market sector if it believes that will help to achieve the Fund’s investment objective. The relative allocations among Underlying Funds within a market sector may be changed at any time without notice to shareholders. If 10% or more of the Fund’s assets are expected to be invested in any Underlying Fund or market sector not listed above, shareholders will receive prior notice of such change.

As part of the Fund’s ability to invest in other investment pools or investment products noted above, the Fund may invest in exchange-traded funds (“ETFs”) and exchange-traded notes (“ETNs”) to gain exposure to various market sectors or securities in order to effect its asset allocation strategy. Additionally, the Fund may use ETFs or ETNs for cash management, hedging or defensive purposes. ETFs or ETNs will be subject to the risks associated with the types of securities or sectors that they track, while ETNs, which are structured as fixed-income obligations, will also be subject to the general risks of fixed-income securities, including credit risk.

The Fund’s asset class allocations, market sector allocations within each asset class, and Underlying Fund allocations within each market sector, as of

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June 30, 2024, are listed in the chart below. These allocations will change over time. Underlying Fund allocations in particular may change from year to year.

Asset Class	Allocation	Market Sector	Allocation	Underlying Funds	Allocation
Equity	86.90%	U.S. Equity	56.79%	Nuveen Equity Index	56.79%
		International Equity	30.11%	Nuveen International Equity Index	20.67%
				Nuveen Emerging Markets Equity Index	9.44%
Fixed-Income	13.10%	Fixed-Income	13.10%	Nuveen Bond Index	13.10%

Total 100.00% 100.00% 100.00%

The following chart shows how the investment glidepath for the Fund is expected to gradually move the Fund’s target allocations over time between the different target market sector allocations. The actual market sector allocations of the Fund may differ from this chart. The Fund seeks to achieve its final target market sector allocations approximately 30 years following the target date.

The Fund is designed to accommodate investors who invest in a fund up to their target retirement date, and plan to make gradual systematic withdrawals in retirement. In addition, investors should note that the Fund will continue to have a significant level of equity exposure up to, through and after its target retirement date, and this exposure could cause significant fluctuations in the value of the Fund depending on the performance of the equity markets generally.

After the Fund reaches its final target allocation, the Board of Trustees may authorize the merger of the Fund into another Lifecycle Index Fund which has also reached its final target allocation or other similar fund designed to maintain a relatively stable asset allocation reflecting the resting point on the glidepath described in the chart above. Fund shareholders will receive prior notice of any such merger.

Principal investment risks

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

Nuveen Lifecycle Index 2045 Fund ■Summary Prospectus     5

·Asset Allocation Risk—The risk that the Fund may not achieve its target allocations. In addition, there is the risk that the asset allocations may not achieve the desired risk-return characteristic or that the selection of Underlying Funds and the allocations among them will result in the Fund underperforming other similar funds or cause an investor to lose money.

·Index Risk—The risk that an Underlying 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 an Underlying Fund’s investments vary from the composition of its benchmark index, the Underlying Fund’s performance could potentially vary from the index’s performance to a greater extent than if the Underlying Fund merely attempted to replicate the index.

·Underlying Funds Risks—The Fund is exposed to the risks of the Underlying Funds in which it invests in direct proportion to the amount of assets the Fund allocates to each Underlying Fund.

·Equity Underlying Funds Risks—The risks of investing in equity Underlying Funds include risks specific to their investment strategies, as well as risks related to the equity markets in general, such as:

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

·issuer 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;

·foreign investment risk—Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, currency, market or economic developments as well as armed conflicts and can result in greater price volatility and perform differently from financial instruments of U.S. issuers. This risk may be heightened in emerging or developing markets. Foreign investments may also have lower liquidity and be more difficult to value than investments in U.S. issuers. To the extent a Fund invests a significant portion of its assets in the securities of companies in a single country or region, it may be more susceptible to adverse economic, market, political or regulatory events or conditions affecting that country or

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region. 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 a Fund’s investments. Economic sanctions and other similar governmental actions or developments could, among other things, effectively restrict or eliminate a Fund’s ability to purchase or sell certain foreign securities or groups of foreign securities, and/or thus may make a 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; and

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

·Fixed-Income Underlying Funds Risks—The risks of investing in fixed-income Underlying Funds include risks specific to their investment strategies, as well as risks related to the fixed-income markets in general, such as:

·interest rate 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 a 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

Nuveen Lifecycle Index 2045 Fund ■Summary Prospectus     7

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 a 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 a Fund from reinvesting principal proceeds at higher interest rates and resulting in less income than potentially available;

·issuer 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—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;

·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 a 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 a Fund to properly value its investments and that a Fund may not be able to purchase or sell an investment at an attractive price, if at all; and

·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 a Fund’s income.

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·Emerging Markets Underlying Funds Risk—The risk of foreign investment often increases in countries with emerging markets or otherwise 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, which would affect a Fund’s ability to evaluate potential portfolio companies. As a result, there could be less information available about issuers in emerging market countries, which could negatively affect Advisors’ ability to evaluate local companies or their potential impact on a Fund’s performance. Because the financial markets of emerging market countries 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. 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 bring actions against bad actors in emerging market countries.

·Illiquid Investments Underlying Funds 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.

·Currency Underlying Funds Risk—The risk that foreign (non-U.S.) currencies may decline in value relative to the U.S. dollar and adversely affect the value of a Fund’s investments in foreign currencies, securities denominated in foreign currencies or derivative instruments that provide exposure to foreign currencies.

·Active Management Risk—The risk that the strategy, investment selection or trading execution of Advisors could cause the Fund or an Underlying Fund to underperform its benchmark index or mutual funds with similar investment objectives and may not produce expected returns.

·Fund of Funds Risk—The ability of the Fund to achieve its investment objective will depend in part upon the ability of the Underlying Funds to achieve their investment objectives. There can be no guarantee that any Underlying Fund will achieve its investment objective.

There can be no assurances that the Fund will achieve its investment objective. You should not consider the Fund to be a complete investment program. Please see the non-summary portion of the Prospectus for more detailed information about the risks described above, including the risks of the Underlying Funds.

Nuveen Lifecycle Index 2045 Fund ■Summary Prospectus     9

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 the Retirement Class 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 the Retirement Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Retirement Class 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 the Retirement, Class I, Premier and Class R6 classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2023, and how those returns compare to those of a broad-based securities market index and a composite index based on the Fund’s target allocations. In accordance with new regulatory requirements, the Fund has selected the Russell 3000^®Index and the Bloomberg U.S. Aggregate Bond Index, which represent broad measures of market performance, and are generally representative of the market sectors or types of investments in which the Fund invests across the equity and fixed-income asset classes. After-tax performance is shown only for the Retirement Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for the Retirement Class shares.

The returns shown below reflect previous agreements by Advisors to waive or reimburse the Fund and certain Underlying Funds 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 indices listed below are unmanaged, and you cannot invest directly in an index. The returns for the indices 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.

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ANNUAL TOTAL RETURNS FOR RETIREMENT CLASS SHARES (%)^†

Nuveen Lifecycle Index 2045 Fund

^†The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2024, was 9.13%.

Best quarter: 18.55%, for the quarter ended June 30, 2020. Worst quarter: -19.36%, for the quarter ended March 31, 2020.

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AVERAGE ANNUAL TOTAL RETURNS

For the Periods Ended December 31, 2023

		Inception date	One year		Five years		Ten years
Retirement Class		9/30/2009
	Return before taxes		19.76	%	11.00	%	8.09	%
	Return after taxes on distributions		19.16	%	10.41	%	7.50	%
	Return after taxes on distributions and sale of
	Fund shares		12.00	%	8.64	%	6.41	%
Class R6		9/30/2009
	Return before taxes		20.07	%	11.29	%	8.36	%
Class I		12/4/2015
	Return before taxes		19.90	%	11.17	%	8.23	%#
Premier Class		9/30/2009
	Return before taxes		19.87	%	11.12	%	8.20	%
Russell 3000® Index
(reflects no deductions for fees, expenses or taxes)			25.96	%	15.16	%	11.48	%
Bloomberg U.S. Aggregate Bond Index
(reflects no deductions for fees, expenses or taxes)			5.53	%	1.10	%	1.81	%
S&P Target Date 2045 Index
(reflects no deductions for fees, expenses or taxes)			19.14	%	10.68	%	7.76	%
Lifecycle Index 2045 Fund Composite Index‡
(reflects no deductions for fees, expenses or taxes)			20.16	%	11.39	%	8.45	%
Current performance of the Fund’s shares may be higher or lower than that shown above.
#	The performance shown for Class I that is prior to its inception date is based on performance of the Fund’s Retirement Class. The performance for these periods has not been restated to reflect the lower expenses of Class I.
‡	As of the close of business on December 31, 2023, the Lifecycle Index 2045 Fund Composite Index consisted of: 56.7% Russell 3000® Index; 30.5% MSCI EAFE + Emerging Markets Index; and 12.8% Bloomberg U.S. Aggregate Bond Index. The Fund’s composite benchmark, the components that make up a composite benchmark and the method of calculating a composite benchmark’s performance may vary over time.
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.

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Portfolio management

Investment Adviser. Teachers Advisors, LLC.

Portfolio Managers.

Name:	John Cunniff, CFA	Steve Sedmak, CFA
Title:	Managing Director	Managing Director
Experience on Fund:	since 2009	since 2018

Purchase and sale of Fund shares

You may purchase, redeem or exchange shares of the Fund on any day that the New York Stock Exchange (“NYSE”) or its affiliated exchanges, NYSE Arca Equities or NYSE American, are open for trading (each such day a “Business Day”) directly from the Fund (for certain share classes) or through a financial advisor, employee benefit plan or other financial intermediary. The Fund’s initial and subsequent investment minimums generally are as follows, although certain financial intermediaries may impose their own investment minimums and the Fund may reduce or waive the minimums in some cases:

	Eligibility and Minimum Initial Investment	Minimum Additional Investment
Class I	Available only through fee-based programs and certain retirement plans, and to other limited categories of investors as described in the Prospectus. $100,000 for all accounts except: ·$250 for clients of financial intermediaries and family offices that have accounts holding Class I shares with an aggregate value of at least $100,000 (or that are expected to reach this level). ·No minimum for eligible retirement plans and certain other categories of eligible investors as described in the Prospectus.	No minimum.
Premier Class, Retirement Class	Available only through certain employee benefit plans, other types of savings plans or accounts and certain financial intermediaries as described in the Prospectus. No minimum.	No minimum.
Class R6	Available only to certain eligible investors as described in the Prospectus and through fee-based programs. $1 million for all accounts except: ·$1,000 for clients of financial intermediaries who charge such clients an ongoing fee for advisory, investment, consulting or related services.	No minimum.

Tax information

The Fund intends to make distributions to shareholders that may be taxed as ordinary income or capital gains. Distributions made to tax-exempt shareholders or shareholders who hold Fund shares in a tax-deferred account are generally

Nuveen Lifecycle Index 2045 Fund ■Summary Prospectus     13

not subject to income tax in the current year, but redemptions made from tax-deferred accounts may be subject to income tax.

Payments to broker-dealers and other financial intermediary compensation

If you purchase shares of the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and/or its related companies may pay the financial intermediary for providing investor services. The Fund’s related companies may also pay the financial intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other financial intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

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