SIMT MID CAP FUND (First Prospectus Summary) | SIMT MID CAP FUND

MID-CAP FUND

Investment Goal

Long-term capital appreciation.

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 MID CAP FUND Class A
Redemption Fee (applies to a redemption, or series of redemptions, from a single identifiable source that, in the aggregate, exceeds $10 million within any thirty (30) day period)	0.75%

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

Annual Fund Operating Expenses		SIMT MID CAP FUND Class A
Management Fees		0.40%
Distribution (12b-1) Fees		none
Other Expenses		0.67%
Total Annual Fund Operating Expenses	[1]	1.07%

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, 1 Year	Expense Example, With Redemption, 3 Years	Expense Example, With Redemption, 5 Years	Expense Example, With Redemption, 10 Years
SIMT MID CAP FUND Class A	109	340	590	1,306

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 151%
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, including ETFs. The Fund will invest
primarily in common stocks of U.S. companies with market capitalizations in the
range of companies in the Russell Midcap Index (between approximately $117
million and $20.47 billion as of December 31, 2011) 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, securities of small capitalization companies and,
to a lesser extent, REITs and securities of large capitalization companies.

The Fund utilizes multiple Sub-Advisers to manage the Fund's portfolio under the
general supervision of SIMC. 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.

Principal Risks

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.

Investment Style Risk - The risk that securities of medium capitalization
companies 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.

Portfolio Turnover Risk - Due to its investment strategy, the Fund may buy and
sell securities frequently. This may result in higher transaction costs and
additional capital gains tax liabilities.

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 and Medium Capitalization Companies Risk - The smaller and medium
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 and medium capitalization companies may have limited product
lines, markets and financial resources and may depend upon a relatively small
management group. Therefore, small and medium capitalization stocks may be more
volatile than those of larger companies. Small and medium capitalization stocks
may be traded over-the-counter or listed on an exchange.

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

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,
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.

Best Quarter: 19.52% (09/30/09)
Worst Quarter: -25.61% (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 MID CAP 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	(4.77%)	(1.26%)	6.23%	8.70%	Feb. 16, 1993
Class A After Taxes on Distributions	Class A Return After Taxes on Distributions	(4.84%)	(1.79%)	5.26%	7.20%	Feb. 16, 1993
Class A After Taxes on Distributions and Sales	Class A Return After Taxes on Distributions and Sale of Fund Shares	(3.00%)	(1.19%)	5.14%	7.04%	Feb. 16, 1993
Russell Midcap Index Return	Russell Midcap Index Return (reflects no deduction for fees, expenses or taxes)	(1.55%)	1.41%	6.99%	9.90%	Feb. 16, 1993	[1]

[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] Index returns are shown from February 28, 1993.