TIAA-CREF Funds Summary Prospectus

TIAA-CREF Real Estate Securities Fund

AUGUST 1, 2020

Class:	Institutional	Advisor	Premier	Retirement	Retail
Ticker:	TIREX	TIRHX	TRRPX	TRRSX	TCREX

Before you invest, you may want to review the Fund’s prospectus, which contains more information about the Fund and its risks. You can find the Fund’s prospectus, reports to shareholders and other information about the Fund online at www.tiaa.org/tcf_pro. You can also get this information at no cost by calling 800-223-1200 or by sending an e-mail request to disclosure@tiaa.org. The Fund’s prospectus and Statement of Additional Information (“SAI”), each dated August 1, 2020, as subsequently supplemented, and the sections of the Fund’s shareholder report dated March 31, 2020 from “Summary Portfolio of Investments” through “Notes to Financial Statements,” are incorporated into this Summary Prospectus by reference and may be obtained free of charge at the website, phone number or e-mail address noted above.

Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the annual and semiannual shareholder reports of the Fund and of the other investment portfolios (collectively with the Fund, the “Funds”) of the TIAA-CREF Funds (the “Trust”) will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, they will be made available on Teachers Insurance and Annuity Association of America’s (“TIAA”) website, TIAA.org, and you will be notified by mail each time a report is posted and provided with a website link to access the report.

If you have already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Funds electronically anytime by either updating your account settings at TIAA.org/eDelivery, if you invest in the Funds directly or hold your Fund shares through a TIAA-affiliated financial intermediary, account or retirement plan (each, a “TIAA Account”), or by contacting your financial intermediary (such as a broker-dealer or bank) through which you hold Fund shares.

If you invest directly with the Funds or through a TIAA Account, you may elect to continue to receive all future shareholder reports in paper free of charge by updating your account settings at TIAA.org/eDelivery or by calling 800-842-2252 during regular business hours. If you invest through another financial intermediary, you can contact your financial intermediary to request that you continue receiving paper copies of your

TIAA-CREF Real Estate Securities Fund ■Summary Prospectus     1

shareholder reports. Your election to receive reports in paper will apply to all funds held through your financial intermediary or, if you are a direct investor or invest through a TIAA Account, to all funds held with the Funds and any other investment companies within the same group of related investment companies.

Investment objective

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

Fees and expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. In addition to the fees and expenses described below, investors may be required to pay a commission to a broker-dealer or other financial intermediary on purchases and sales of Institutional Class or Advisor Class shares of the Fund.

SHAREHOLDER FEES (fees paid directly from your investment)

	Institutional Class	Advisor Class	Premier Class	Retirement Class	Retail Class
Maximum sales charge imposed on purchases (percentage of offering price)	0%	0%	0%	0%	0%
Maximum deferred sales charge	0%	0%	0%	0%	0%
Maximum sales charge imposed on reinvested dividends and other distributions	0%	0%	0%	0%	0%
Redemption or exchange fee	0%	0%	0%	0%	0%
Account maintenance fee (annual fee on accounts under $2,000)	0%	0%	0%	0%	$15.00

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

		Institutional Class	Advisor Class	Premier Class	Retirement Class	Retail Class
Management fees		0.47%	0.47%	0.47%	0.47%	0.47%
Distribution (Rule 12b-1) fees		—	—	0.15%	—	0.25%
Other expenses		0.03%	0.15%	0.03%	0.28%	0.07%
Total annual Fund operating expenses		0.50%	0.62%	0.65%	0.75%	0.79%
Waivers and expense reimbursements1		—	—	—	—	—
Total annual Fund operating expenses after
	fee waiver and/or expense reimbursement	0.50%	0.62%	0.65%	0.75%	0.79%

1 Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Teachers Advisors, LLC, 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) 0.57% of average daily net assets for Institutional Class shares; (ii) 0.72% of average daily net assets for Advisor Class shares; (iii) 0.72% of average daily net assets for Premier Class shares; (iv) 0.82% of average daily net assets for Retirement Class shares; and (v) 0.96% of average daily net assets for Retail Class shares of the Fund. These expense reimbursement arrangements will continue through at least July 31, 2021, unless changed with 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 the same. The example assumes that the Fund’s fee waiver and/or expense reimbursement arrangements will each remain in place for the duration noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

	Institutional Class		Advisor Class		Premier Class		Retirement Class		Retail Class
1 year	$	51	$	63	$	66	$	77	$	81
3 years	$	160	$	199	$	208	$	240	$	252
5 years	$	280	$	346	$	362	$	417	$	439
10 years	$	628	$	774	$	810	$	930	$	978

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.

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During the fiscal year ended March 31, 2020, the Fund’s portfolio turnover rate was 39% of the average value of its portfolio.

Principal investment strategies

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

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

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

Principal investment risks

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

·Real Estate Investing Risk—As a result of the Fund’s investment objective, the Fund is subject to all of the risks associated with the ownership of real estate. These risks include, among others, declines in the value of real estate, negative changes in the climate for real estate, risks related to general and local economic conditions, decreases in property revenues,

4     Summary Prospectus■TIAA-CREF Real Estate Securities Fund

increases in prevailing interest rates, property taxes and operating expenses, changes in zoning laws and costs resulting from the cleanup of environmental problems.

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

·Market Risk—The risk that market prices of portfolio investments held by the 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. From time to time, the Fund may invest a significant portion of its assets in companies in one or more related sectors or industries, which would make the Fund more vulnerable to adverse developments affecting such sectors or industries.

·Foreign Investment Risk—Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, currency, market or economic developments 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.

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

·Industry/Sector Concentration Risk—The risk that focusing on investment in specific industries or sectors makes a fund more vulnerable to developments particularly affecting those industries or sectors than a more broadly diversified fund would be.

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

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

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

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

Past performance

The following chart and table help illustrate some of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year. The bar chart shows the annual total returns of the Institutional 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 Institutional Class may vary from the other share classes. Below the bar chart are the best and worst returns of the Institutional 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 Institutional, Advisor, Premier, Retirement and Retail classes over the applicable one-year, five-year, ten-year and since-inception periods ended December 31, 2019, and how those returns compare to those of the Fund’s benchmark index. After-tax performance is shown only for Institutional Class shares, and after-tax returns for the other classes of shares will vary from the after-tax returns presented for Institutional Class shares.

The returns shown below reflect previous agreements by Advisors to waive, reimburse and/or compensate the Fund for certain fees, expenses and/or costs. Without these reductions and/or compensation, the returns of the Fund would have been lower. Past performance of the Fund (before and after taxes) is not necessarily an indication of how it will perform in the future. The benchmark index listed below is unmanaged, and you cannot invest directly in an index. The returns for the 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.tiaa.org. For information on the effect of compensation paid to the Fund on performance, see the Financial highlights for the Fund in the non-summary portion of the Prospectus.

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ANNUAL TOTAL RETURNS FOR THE INSTITUTIONAL CLASS SHARES (%)^†

Real Estate Securities Fund

^†The year-to-date return as of the most recent calendar quarter, which ended on June 30, 2020, was -8.89%.

Best quarter: 17.29%, for the quarter ended March 31, 2019. Worst quarter: -15.63%, for the quarter ended September 30, 2011.

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AVERAGE ANNUAL TOTAL RETURNS

For the Periods Ended December 31, 2019

		Inception date	One year		Five years		Ten years
Institutional Class		10/1/2002
	Return before taxes		31.09	%	9.06	%	12.92	%
	Return after taxes on distributions		29.35	%	7.37	%	11.57	%
	Return after taxes on distributions and sale of
	Fund shares		19.81	%	6.64	%	10.27	%
Advisor Class		12/4/2015
	Return before taxes		30.85	%	8.95	%*	12.87	%*
Premier Class		9/30/2009
	Return before taxes		30.88	%	8.89	%	12.74	%
Retirement Class		10/1/2002
	Return before taxes		30.78	%	8.78	%	12.63	%
Retail Class		10/1/2002
	Return before taxes		30.78	%	8.72	%	12.57	%
FTSE Nareit All Equity REITs Index
(reflects no deductions for fees, expenses or taxes)			28.66	%	8.43	%	12.59	%
Current performance of the Fund’s shares may be higher or lower than that shown above.
*	The performance shown for the Advisor Class that is prior to its inception date is based on performance of the Institutional Class. The performance for these periods has not been restated to reflect the actual expenses of the Advisor Class. If these actual expenses had been reflected, the performance of the Advisor Class shown for these periods would have been different because the Advisor Class has different expenses than the Institutional Class.
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.

Portfolio management

Investment Adviser. The Fund’s investment adviser is Teachers Advisors, LLC.

Portfolio Managers. The following persons are primarily responsible for the management of the Fund on a day-to-day basis:

Name:	David Copp	Brendan Lee
Title:	Managing Director	Managing Director
Experience on Fund:	since 2005	since 2006

Purchase and sale of Fund shares

Institutional Class shares are available for purchase directly from the Fund by certain eligible investors (which include employee benefit plans and financial intermediaries). Advisor Class shares are available for purchase through certain

8     Summary Prospectus■TIAA-CREF Real Estate Securities Fund

financial intermediaries, employee benefit plans and insurance company separate accounts. Premier Class and Retirement Class shares are generally available for purchase through employee benefit plans, other types of savings plans or accounts and certain financial intermediaries. Retail Class shares are available for purchase through certain financial intermediaries or by contacting the Fund directly at 800-223-1200 or www.tiaa.org.

·The minimum initial investment is $2 million and the minimum subsequent investment is $1,000 for Institutional Class shares, unless an investor purchases shares by or through financial intermediaries that have entered into an appropriate agreement with the Fund or its affiliates. Employee benefit plans, fee-based managed account programs (“wrap accounts”), state sponsored 529 college savings plans, collective trust funds, investment companies or other pooled investment vehicles, thrifts and bank and trust companies that have entered into agreements to offer Institutional Class shares held in omnibus accounts on the books of the Fund are exempt from initial and subsequent investment minimums.

·There are no minimum initial or subsequent investment requirements for Advisor Class, Premier Class or Retirement Class shares.

·The minimum initial investment for Retail Class shares is $2,000 per Fund account for Traditional IRA, Roth IRA and Coverdell accounts and $2,500 for all other account types. Subsequent investments for all account types must be at least $100.

Redeeming or Exchanging Shares. You can redeem (sell) or exchange your 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”). Exchanges may be made for shares of the same share class of other funds offered by the Trust. If your shares are held through a third party, please contact that entity for applicable redemption or exchange requirements.

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 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

TIAA-CREF Real Estate Securities Fund ■Summary Prospectus     9

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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