SIMT S&P 500 Index Fund (First Prospectus Summary) | 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 and hold
Fund shares.

SHAREHOLDER FEES (fees paid directly from your investment)

Shareholder Fees	SIMT S&P 500 Index Fund Class A
Redemption Fee (applies to a redemption, or series of redemptions, from a single identifiable source that, in the aggregate, exceeds $50 million within any thirty (30) day period)	0.15%

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

Annual Fund Operating Expenses		SIMT S&P 500 Index Fund Class A
Management Fees		0.03%
Distribution (12b-1) Fees		none
Other Expenses		0.51%
Total Annual Fund Operating Expenses	[1]	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 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 (USD $)	Expense Example, With Redemption, No Expense Reimbursement, 1 Year	Expense Example, With Redemption, No Expense Reimbursement, 3 Years	Expense Example, With Redemption, No Expense Reimbursement, 5 Years	Expense Example, With Redemption, No Expense Reimbursement, 10 Years
SIMT S&P 500 Index Fund Class A	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 61%
of the average value of its portfolio.

Principal Investment Strategies

The S&P 500 Index Fund invests substantially all of its assets in securities
listed in the 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 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 ETFs, ADRs and real estate investment trusts (REITs). The Fund may
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 Sub-Adviser selects the Fund's
securities under the general supervision of SIMC, 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

Depositary Receipts Risk - Depositary receipts, such as ADRs, are certificates
evidencing ownership of shares of a foreign issuer that are issued by depositary
banks and generally trade on an established market. Depositary receipts are
subject to many of the risks associated with investing directly in foreign
securities, including, among other things, political, social and economic
developments abroad, currency movements and different legal, regulatory and tax
environments.

Equity Market Risk - The risk that stock prices will fall over short or extended
periods of time.

Exchange-Traded Funds (ETFs) Risk - The risks of owning shares of an ETF
generally reflect the risks of owning the underlying securities the ETF is
designed to track, although lack of liquidity in an ETF could result in its
value being more volatile than the underlying portfolio securities.

Foreign Investment Risk - The risk that non-U.S. securities may be subject to
additional risks due to, among other things, political, social and economic
developments abroad, currency movements and different legal, regulatory and tax
environments.

Investment Style Risk - The risk that the Fund's investment approach, which
attempts to replicate the performance of the S&P 500 Index, may underperform
other segments of the equity markets or the equity markets as a whole.

Liquidity Risk - The risk that certain securities may be difficult or impossible
to sell at the time and the price that the Fund would like. The Fund may have to
lower the price, sell other securities instead or forego an investment
opportunity, any of which could have a negative effect on Fund management or
performance.

REITs Risk - REITs are trusts that invest primarily in commercial real estate or
real estate-related loans. The Fund's investments in REITs will be subject to
the risks associated with the direct ownership of real estate. Risks commonly
associated with the direct ownership of real estate include fluctuations in the
value of underlying properties, defaults by borrowers or tenants, changes in
interest rates and risks related to general or local economic conditions. Some
REITs may have limited diversification and may be subject to risks inherent in
financing a limited number of properties.

Small Capitalization Risk - Smaller capitalization companies in which the Fund
invests may be more vulnerable to adverse business or economic events than
larger, more established companies. In particular, small capitalization
companies may have limited product lines, markets and financial resources and
may depend upon a relatively small management group. Therefore, small
capitalization stocks may be more volatile than those of larger companies. Small
capitalization stocks may be traded over-the-counter or listed on an exchange.

Tracking Error Risk - The risk that the Fund's performance may vary
substantially from the performance of the benchmark index it tracks as a result
of cash flows, Fund expenses, imperfect correlation between the Fund's and
benchmark's investments and other factors.

Loss of money is a risk of investing in the Fund.

Performance Information

The S&P 500 Index Fund is the successor to SEI Index Funds' S&P 500 Index Fund
(the Former S&P 500 Index Fund) and the Former S&P 500 Index Fund's performance
and financial history.

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,
compared 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.

The Fund commenced operations on September 17, 2007. The performance information
prior to September 17, 2007 is based on the performance of the Former S&P 500
Index Fund.

Best Quarter: 15.90% (06/30/09)
Worst Quarter: -22.20% (12/31/08)

Average Annual Total Returns (for the periods ended December 31, 2011)

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 Total Returns SIMT S&P 500 Index Fund	Average Annual Returns, Label		Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Since Inception	Average Annual Returns, Inception Date
Class A	Class A Return Before Taxes	[1]	1.77%	(0.60%)	2.53%	5.79%	Feb. 28, 1996
Class A After Taxes on Distributions	Class A Return After Taxes on Distributions	[1]	1.50%	(1.10%)	2.06%	5.22%	Feb. 28, 1996
Class A After Taxes on Distributions and Sales	Class A Return After Taxes on Distributions and Sale of Fund Shares	[1]	1.47%	(0.57%)	2.10%	4.92%	Feb. 28, 1996
S&P 500 Index Return	S&P 500 Index Return (reflects no deduction for fees, expenses or taxes)		2.11%	(0.25%)	2.92%	6.25%	Feb. 28, 1996	[2]

[1] Because the Fund incurred AFFE during the most recent fiscal year, the operating expenses in this fee table will not correlate to the expense ratio in the Fund's financial statements (or the "Financial Highlights" section in the prospectus) because the financial statements include only the direct operating expenses incurred by the Fund, not the indirect costs of investing in other investment companies.

[1] The Fund commenced operations on September 17, 2007. The performance information prior to September 17, 2007 is based on the performance of the Former S&P 500 Index Fund.

[2] Index returns are shown from February 29, 1996.