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Class F Prospectus | SIMT S&P 500 Index Fund

S&P 500 INDEX FUND

Investment Goal

Investment results that correspond to the aggregate price and dividend performance of the securities in the S&P 500 Index.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy, hold, and sell Fund shares. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in this table and examples below.

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

Annual Fund Operating Expenses	Class F Prospectus SIMT S&P 500 Index Fund Class F
Management Fees	0.03%
Distribution (12b-1) Fees	none
Other Expenses	0.51%
Total Annual Fund Operating Expenses	0.54%

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 redeem or hold all of 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 remain the same.

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example	1 Year	3 Years	5 Years	10 Years
Class F Prospectus | SIMT S&P 500 Index Fund | Class F | USD ($)	55	173	302	677

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 5% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests substantially all of its assets (at least 80%) in securities listed in the Standard & Poor's 500 Composite Stock Price Index (S&P 500 Index), which is composed of approximately 500 leading U.S. publicly traded companies from a broad range of industries (mostly common stocks). The Fund's investment results are expected to correspond to the aggregate price and dividend performance of the S&P 500 Index before the

fees and expenses of the Fund. The Fund generally gives the same weight to a given stock as the S&P 500 Index does.

In seeking to replicate the performance of the S&P 500 Index, the Fund may also invest in futures contracts, American Depositary Receipts (ADRs), real estate investment trusts (REITs) and exchange-traded funds (ETFs). The Fund may also invest a portion of its assets in securities of companies located in developed foreign countries and securities of small capitalization companies. The Fund's ability to replicate the performance of the S&P 500 Index will depend to some extent on the size and timing of cash flows into and out of the Fund, as well as on the level of the Fund's expenses. The Fund may use futures contracts to obtain exposure to the equity market during high volume periods of investment into the Fund. The Fund's sub-adviser (the Sub-Adviser) selects the Fund's securities under the general supervision of the Fund's adviser, SEI Investments Management Corporation (SIMC or the Adviser), but the Sub-Adviser makes no attempt to "manage" the Fund in the traditional sense (i.e., by using economic, market or financial analyses). Instead, the Sub-Adviser purchases a basket of securities that includes most of the companies in the S&P 500 Index. However, the Sub-Adviser may sell an investment if the merit of the investment has been substantially impaired by extraordinary events or adverse financial conditions.

Principal Risks

Performance Information

The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing how the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception, compare with those of a broad measure of market performance. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. For current performance information, please call 1-800-DIAL-SEI.

Best Quarter: 20.47% (06/30/2020)
Worst Quarter: -19.67% (03/31/2020)

Average Annual Total Returns (for the periods ended December 31, 2023)

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. Your actual after-tax returns will depend on your tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

Average Annual Returns - Class F Prospectus - SIMT S&P 500 Index Fund	Label	Average Annual Returns, 1 Year	[1]	Average Annual Returns, 5 Years	[1]	Average Annual Returns, 10 Years	[1]	Average Annual Returns, Since Inception	[1]	Average Annual Returns, Inception Date	[1]
Class F	Return Before Taxes	25.98%		15.41%		11.69%		9.06%		Feb. 28, 1996
After Taxes on Distributions | Class F	Return After Taxes on Distributions	24.64%		13.64%		10.21%		8.17%
After Taxes on Distributions and Sale of Fund Shares | Class F	Return After Taxes on Distributions and Sale of Fund Shares	16.29%		12.18%		9.31%		7.66%
S&P 500 Index Return (reflects no deduction for fees, expenses or taxes)	S&P 500 Index Return (reflects no deduction for fees, expenses or taxes)	26.29%		15.69%		12.03%		9.46%		Feb. 28, 1996

[1] The Fund is the successor to SEI Index Funds' S&P 500 Index Fund (the Predecessor Fund). The Fund commenced operations on September 17, 2007. Accordingly, for periods prior to September 17, 2007, performance information is based on the performance of the Predecessor Fund's Class A Shares.