Jan. 28, 2026

SIMT MID CAP FUND | MID-CAP FUND - Class I Prospectus

Investment Goal

Long-term capital appreciation.

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)

(expenses that you pay each year as a percentage of the value of your investment)	Class I Shares
Management Fees		0.40	%
Distribution (12b-1) Fees		None
Other Expenses		0.84	%
Total Annual Fund Operating Expenses		1.24	%

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:

	1 Year		3 Years		5 Years		10 Years
Mid-Cap Fund — Class I Shares	$	126	$	393	$	681	$	1,500

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 62% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Mid-Cap Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of medium-sized companies. For purposes of this Fund, a medium-sized company is a company with a market capitalization in the range of companies in the Russell Midcap Index (between approximately $1.0 billion and $101.6 billion as of December 31, 2025) at the time of purchase. The market capitalization range and the composition of the Russell Midcap Index are

subject to change. The Fund's investments in equity securities may include common and preferred stocks, warrants and, to a lesser extent, securities of small capitalization companies, real estate investment trusts (REITs), exchange-traded funds (ETFs) and securities of large capitalization companies.

The Fund uses a multi-manager approach, relying on a number of sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser). In managing the Fund's assets, the Sub-Advisers select stocks of companies that have low price-earnings and price-book ratios, but that also have high sustainable growth levels and the probability of high positive earnings revisions.

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: 24.27% (06/30/2020)
Worst Quarter: -30.53% (03/31/2020)

Best Quarter: 24.27% (06/30/2020)
Worst Quarter: -30.53% (03/31/2020)

Average Annual Total Returns (for the periods ended December 31, 2025)

This table compares the Fund's average annual total returns to those of a broad-based securities market index and an additional index with characteristics relevant to the Fund's investment strategy.

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. In some cases, the Fund's return after taxes may exceed the Fund's return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period.

Mid-Cap Fund*	1 Year			5 Years			10 Years			Since Inception (2/16/1993)
Return Before Taxes		9.78	%		9.62	%		9.71	%		9.57	%
Return After Taxes on Distributions		5.01	%		7.03	%		7.68	%		7.80	%
Return After Taxes on Distributions and Sale of Fund Shares		9.12	%		7.14	%		7.39	%		7.61	%
S&P 500 Index Return (reflects no deduction for fees, expenses or taxes)		17.88	%		14.42	%		14.82	%		10.84	%
Russell Midcap Index Return (reflects no deduction for fees, expenses or taxes)		10.60	%		8.67	%		11.01	%		10.91	%

* The Fund's Class I Shares commenced operations on October 1, 2007. Therefore, the Fund's average annual total returns for the periods prior to that time are based on the average annual total returns of the Class F Shares, adjusted for the higher expenses of the Class I Shares.