Summary Prospectus by Investment Company (Form 497K)

      

Before you invest, you may want to review the fund's prospectus, which contains more information about the fund and its risks. You may find the fund's prospectus and other information about the fund online at:

www.statestreet.com/im

You also may get this information at no cost by calling (800) 647-7327 or by sending an e-mail request to [email protected]. The fund's current prospectus and statement of additional information are incorporated by reference into this summary prospectus.

Investment Objective

State Street S&P 500 Index Fund (the "Fund") seeks to replicate as closely as possible, before expenses, the performance of the S&P 500® Index.

Fees and Expenses of the Fund

The tables below describe the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund ("Fund Shares"). You may pay other fees, such as brokerage commissions and other fees to financial intermediaries which are not reflected in the tables and examples below.

Shareholder Fees (fees paid directly from your investment) 

Maximum Sales Charge (Load) Imposed On Purchases (as a percentage of offering price)	None
Maximum Deferred Sales Charge (Load) (as a percentage of the net asset value)	None

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 

Management Fees	0.030%
Distribution and Shareholder Service (12b-1) Fees1	0.061%
Other Expenses	0.081%
Total Annual Fund Operating Expenses	0.172%
Less Fee Waivers and/or Expense Reimbursements2	(0.015%)
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements	0.157%

Example

This Example is intended to help you compare the cost of investing in 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 sell or hold all of your Fund 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 remain the same. The calculation of costs for the one-year period takes into

      

account the effect of any current contractual fee waivers and/or reimbursements; and the calculation of costs for the remaining periods takes such fee waivers and/or reimbursements into account only for the first year of each such period. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 

1 year	3 years	5 years	10 years
$16	$54	$95	$218

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 most recent fiscal year, the Fund's portfolio turnover rate was 2% of the average value of its portfolio.

Principal Investment Strategies

The Fund uses an index tracking management strategy designed to track the performance of the S&P 500® Index ("S&P 500" or "Index"). The Index is a well-known stock market index that includes common stocks of 500 companies from a number of sectors and that measures the performance of the large-cap sector of the U.S. equities market. As of October 31, 2025, a significant portion of the Fund comprised companies in the information technology sector, although this may change from time to time.

The Fund is not managed according to traditional methods of "active" investment management, which involve the buying and selling of securities based upon economic, financial and market analysis and investment judgment. Instead, the Fund, using an "indexing" investment approach, attempts to replicate, before expenses, the performance of the S&P 500.

Under normal market conditions, the Fund will not invest less than 80% of its total assets in stocks in the Index. The notional value of the Fund's investments in derivatives or other synthetic instruments that provide exposure comparable, in the judgment of the Adviser, to the foregoing types of investments may be counted toward satisfaction of this 80% policy. The Fund attempts to replicate the investment performance of the S&P 500 and generally intends to invest in all stocks comprising the S&P 500 in approximate proportion to their weightings in the Index. However, it may not be possible or practicable to purchase all stocks of the S&P 500 in those weightings. When it is not possible or practicable to purchase all stocks of the S&P 500 in those weightings, the Fund may purchase a sample of the stocks listed in the S&P 500 in proportions expected by the Adviser to match generally the performance of the Index as a whole. In addition, from time to time stocks are added to or removed from the Index. The Fund may sell securities that are represented in the Index, or purchase securities that are not yet represented in the Index, in anticipation of their removal from or addition to the Index. Shareholders will receive sixty (60) days' notice prior to a change in the 80% investment policy.

In addition to common stocks in the S&P 500, the Fund may at times purchase or sell futures contracts on the Index, or options on those futures, in lieu of investing directly in the stocks making up the Index. The Fund might do so, for example, in order to increase its investment exposure pending investment of cash in the stocks comprising the Index. Alternatively, the Fund might use futures or options on futures to reduce its investment exposure in situations where it intends to sell a portion of the stocks in its portfolio but the sale has not yet been completed. The Fund may also enter into other derivatives transactions, including the use of options or swap transactions, to assist in attempting to replicate the performance of the Index. The Fund may also, to the extent permitted by applicable law, invest in shares of mutual funds (including those advised by the Adviser) whose investment objectives and policies are similar to those of the Fund.

Principal Risks

The Fund is subject to the following principal risks. You could lose money by investing in the Fund. Certain risks relating to instruments and strategies used in the management of the Fund are placed first. The significance of any specific risk to an investment in the Fund will vary over time, depending on the composition of the Fund's portfolio, market conditions,

      

and other factors. You should read all of the risk information presented below carefully, because any one or more of these risks may result in losses to the Fund. An investment in the Fund is subject to investment risks, including possible loss of principal, is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation ("FDIC") or any other government agency. The Fund may not achieve its investment objective. The Fund is not intended to be a complete investment program, but rather is intended for investment as part of a diversified investment portfolio. Investors should consult their own advisers as to the role of the Fund in their overall investment programs.

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, military conflicts, acts of terrorism, trade policy changes or disputes, the threat or actual imposition of tariffs, natural disasters, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments.

Equity Investing Risk: The market prices of equity securities owned by the Fund may go up or down, sometimes rapidly or unpredictably. The value of a security may decline for a number of reasons that may directly relate to the issuer and also may decline due to general industry or market conditions that are not specifically related to a particular company. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time.

Indexing Strategy/Index Tracking Risk: The Fund is managed with an indexing investment strategy, attempting to track the performance of an unmanaged index of securities, regardless of the current or projected performance of the Index or of the actual securities comprising the Index. This differs from an actively-managed fund, which typically seeks to outperform a benchmark index. As a result, the Fund's performance may be less favorable than that of a portfolio managed using an active investment strategy. The structure and composition of the Index will affect the performance, volatility, and risk of the Index and, consequently, the performance, volatility, and risk of the Fund. While the Adviser seeks to track the performance of the Index (i.e., achieve a high degree of correlation with the Index), the Fund's return may not match the return of the Index. The Fund incurs a number of operating expenses not applicable to the Index, and may incur costs in buying and selling securities. In addition, the Fund may not be fully invested at times, generally as a result of cash flows into or out of the Fund or reserves of cash held by the Fund to meet redemptions. The Adviser may attempt to replicate the Index return by investing in fewer than all of the securities in the Index, or in some securities not included in the Index, potentially increasing the risk of divergence between the Fund's return and that of the Index.

Counterparty Risk: The Fund will be subject to credit risk with respect to the counterparties with which the Fund enters into derivatives contracts, repurchase agreements, reverse repurchase agreements, and other transactions. If a counterparty fails to meet its contractual obligations, the Fund may be unable to terminate or realize any gain on the investment or transaction, or to recover collateral posted to the counterparty, resulting in a loss to the Fund. If the Fund holds collateral posted by its counterparty, it may be delayed or prevented from realizing on the collateral in the event of a bankruptcy or insolvency proceeding relating to the counterparty.

Derivatives Risk: Derivative transactions can create investment leverage and may have significant volatility. It is possible that a derivative transaction will result in a much greater loss than the principal amount invested, that changes in the value of a derivative transaction may not correlate perfectly with the underlying asset, and that the Fund may not be able to close out a derivative transaction at a favorable time or price. The counterparty to a derivatives contract may be unable or unwilling to make timely settlement payments, return the Fund's margin, or otherwise honor its obligations. A derivatives transaction may not behave in the manner anticipated by the Adviser or may not have the effect on the Fund anticipated by the Adviser.

      

Large-Capitalization Securities Risk: Returns on investments in securities of large companies could trail the returns on investments in securities of smaller and mid-sized companies. Larger companies may be unable to respond as quickly as smaller and mid-sized companies to competitive challenges or to changes in business, product, financial, or other market conditions. Larger companies may not be able to maintain growth at the high rates that may be achieved by well-managed smaller and mid-sized companies.

Risk of Investment in Other Pools: If the Fund invests in another pooled investment vehicle (e.g., a mutual fund or exchange-traded fund), it is exposed to the risk that the other pool will not perform as expected and is exposed indirectly to all of the risks applicable to an investment in such other pool. The investment policies of the other pool may not be the same as those of the Fund; as a result, an investment in the other pool may be subject to additional or different risks than those to which the Fund is typically subject. The Fund bears its proportionate share of the fees and expenses of any pool in which it invests. The Adviser or an affiliate may serve as investment adviser to a pool in which the Fund may invest, leading to potential conflicts of interest. It is possible that other clients of the Adviser or its affiliates will purchase or sell interests in a pool sponsored or managed by the Adviser or its affiliates at prices and at times more favorable than those at which the Fund does so.

Information Technology Sector Risk: Market or economic factors impacting information technology companies could have a major effect on the value of the Fund's investments. The value of stocks of information technology companies is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from foreign competitors with lower production costs. Like other technology companies, information technology companies may have limited product lines, markets, financial resources or personnel. Stocks of technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.

Unconstrained Sector Risk: The Fund may invest a substantial portion of its assets within one or more economic sectors or industries, which may change from time to time. Greater investment focus on one or more sectors or industries increases the potential for volatility and the risk that events negatively affecting such sectors or industries could reduce returns, potentially causing the value of the Fund's Shares to decrease, perhaps significantly.

Performance

The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods ended December 31, 2024 compared with those of the Index. The Fund's past performance does not necessarily indicate how the Fund will perform in the future. Current performance information for the Fund is available toll free by calling (800) 647-7327 or by visiting our website at www.statestreet.com/im.

Annual Total Returns (years ended 12/31)

  

	Returns	Quarter/Year
Highest Quarterly Return	20.58%	Q2 2020
Lowest Quarterly Return	-19.44%	Q1 2020
Year-to-Date	14.67%	9/30/2025

      

Average Annual Total Returns (for periods ended 12/31/24) 

	One Year	Five Years	Ten Years
Class N
Return Before Taxes	24.82 %	14.43 %	12.96 %
Return After Taxes on Distributions	22.27 %	11.39 %	10.51 %
Return After Taxes on Distributions and Sale of Fund Shares	16.54 %	10.92 %	10.02 %
S&P 500 Index (reflects no deduction for fees, expenses or taxes)	25.02 %	14.53 %	13.10 %

The returns for certain periods would have been lower without the effect of a contractual fee waiver and/or reimbursement.

Fund returns after taxes on distributions and sale of Fund Shares may be higher than returns before taxes and/or returns after taxes on distributions for certain periods because they reflect the tax benefit an investor may receive as a result of the capital losses that would have been incurred on the sale of Fund Shares.

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. After-tax returns depend on an investor's tax situation and may differ from those shown above, and after-tax returns are not relevant to investors who hold their shares through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts ("IRAs").

Investment Adviser

SSGA FM serves as the investment adviser to the Fund.

Karl Schneider, Amy Scofield and Emiliano Rabinovich serve as portfolio managers of the Fund. They have served on the Fund since 2004, 2012 and 2022, respectively.

Karl Schneider, CAIA, is a Managing Director of the Adviser and Co-Head of the Systematic Equity Team in the Americas. He joined the Adviser in 1997.

Amy Scofield is a Vice President of the Adviser and a Portfolio Manager in the Systematic Equity Team. She joined the Adviser in 2010.

Emiliano Rabinovich, CFA, is a Managing Director of the Adviser and Co-Head of the Systematic Equity Team in the Americas. He joined the Adviser in 2006.

Purchase and Sale of Fund Shares

Purchase Minimums

The Fund's initial and subsequent investment minimums generally are as follows, although the Fund may reduce or waive the minimums in some cases. 

To establish an account
All accounts (other than individual retirements accounts (IRAs))	$10,000
Individual retirement accounts (IRAs)	$250
To add to an existing account (all accounts)	$100

  You may purchase or redeem Fund Shares on any day the Fund is open for business.

      

Shareholder accounts held through brokers, banks and other financial intermediaries that maintain one or more accounts with the Fund (including fee-based wrap accounts, individual retirement accounts (IRAs) or retirement plan accounts) will not be subject to the initial or subsequent minimum investment amount requirement.

Written Requests and Wire Transfers. You may purchase or redeem Fund Shares by written request or wire transfer.

Written requests should be sent to:

By Mail:

SSGA Funds
P.O. Box 219737
Kansas City, MO 64121-9737

By Overnight/Registered, Express, Certified Mail:

SSGA Funds
801 Pennsylvania Avenue, Suite 219737
Kansas City, MO 64105-1307

For wire transfer instructions, please call (800) 647-7327 between 8 a.m. and 6 p.m. Eastern time. Redemptions by telephone are permitted only if you previously have been authorized for these transactions.

By Intermediary:

If you wish to purchase or redeem Fund Shares through a broker, bank or other financial intermediary ("Financial Intermediary"), please contact that Financial Intermediary directly. Your Financial Intermediary may have different or additional requirements for opening an account and/or for the processing of purchase and redemption orders, or may be closed at times when the Fund is open. Financial Intermediaries may contact SS&C GIDS, Inc. at (877) 332-6207 or via email at [email protected] with questions.

Tax Information

The Fund's distributions are expected to be taxed as ordinary income, qualified dividend income and/or capital gains, unless you are investing through a tax-advantaged arrangement, such as a 401(k) plan or IRA. Any withdrawals made from such tax-advantaged arrangement may be taxable to you.

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase Fund Shares through a broker-dealer or other Financial Intermediary (such as a bank), the Fund, the Adviser or its affiliates may pay the Financial Intermediary for certain activities related to the Fund, including educational training programs, conferences, the development of technology platforms and reporting systems, or other services related to the sale or promotion of the Fund. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your Financial Intermediary's website for more information.