SIMT SMALL CAP GROWTH FUND (Third Prospectus Summary) | SIMT SMALL CAP GROWTH FUND

SMALL CAP GROWTH 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 SMALL CAP GROWTH FUND Class G
Redemption Fee (applies to a redemption, or series of redemptions, from a single identifiable source that, in the aggregate, exceeds $25 million within any thirty (30) day period)	1.00%

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

Annual Fund Operating Expenses	SIMT SMALL CAP GROWTH FUND Class G
Management Fees	0.65%
Distribution (12b-1) Fees	0.25%
Other Expenses	0.64%
Total Annual Fund Operating Expenses	1.54%

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, 1 Year	Expense Example, With Redemption, 3 Years	Expense Example, With Redemption, 5 Years	Expense Example, With Redemption, 10 Years
SIMT SMALL CAP GROWTH FUND Class G	157	486	839	1,834

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 125%
of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Small Cap Growth Fund will invest at least 80%
of its net assets (plus the amount of any borrowings for investment purposes) in
equity securities of small 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 2000 Index (between $16 million and $3.70
billion as of December 31, 2011) or the S&P SmallCap 600 Index (between $37
million and $3.66 billion as of December 31, 2011), each as determined at the
time of purchase. The market capitalization range and the composition of the
Russell 2000 Index and the S&P SmallCap 600 Index are subject to change. The
Fund's investments in equity securities may include common and preferred stocks
and, to a lesser extent, REITs and securities of large capitalization companies.

The Fund uses a multi-manager approach, relying upon a number of Sub-Advisers to
manage portions of the Fund's portfolio under the general supervision of SIMC.
In managing its portion of the Fund's assets, each Sub-Adviser selects stocks it
believes have attractive growth and appreciation potential in light of such
characteristics as revenue and earnings growth, expectations from sell-side
analysts and relative valuation, among other considerations.

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 small capitalization securities 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 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.

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

Performance Information

As of January 31, 2012, Class G Shares of the Fund had not commenced operations
and did not have a performance 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. Since Class G
Shares are invested in the same portfolio of securities, return for Class G
Shares will be substantially similar to those of Class A Shares, shown here, and
will differ only to the extent that Class G Shares have higher expenses. 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   Worst Quarter  
   27.43%         -29.67%     
  06/30/03       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 SMALL CAP GROWTH 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 G	Class A Return Before Taxes	(2.55%)	(2.31%)	1.50%	8.00%	Apr. 20, 1992
Class G After Taxes on Distributions	Class A Return After Taxes on Distributions	(2.55%)	(2.61%)	1.35%	6.47%	Apr. 20, 1992
Class G After Taxes on Distributions and Sales	Class A Return After Taxes on Distributions and Sale of Fund Shares	(1.66%)	(1.97%)	1.28%	6.34%	Apr. 20, 1992
Russell 2000 Growth Index Return	Russell 2000 Growth Index Return (reflects no deduction for fees, expenses or taxes)	(2.91%)	2.09%	4.48%	6.10%	Apr. 20, 1992	[1]

[1] Index returns are shown from April 30, 1992.