SIMT ENHANCED INCOME FUND (Third Prospectus Summary) | SIMT ENHANCED INCOME FUND

ENHANCED INCOME FUND

Investment Goal

Capital appreciation and income.

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 ENHANCED INCOME FUND Class G
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 ENHANCED INCOME FUND Class G
Management Fees	0.40%
Distribution (12b-1) Fees	0.25%
Other Expenses	0.65%
Total Annual Fund Operating Expenses	1.30%

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 ENHANCED INCOME FUND Class G	132	412	713	1,568

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 174%
of the average value of its portfolio.

Principal Investment Strategies

The Enhanced Income Fund invests primarily in a diversified portfolio of
investment grade and non-investment grade fixed-income securities, including:
(i) securities issued or guaranteed by the U.S. Government and its agencies and
instrumentalities and obligations of U.S. and foreign commercial banks, such as
certificates of deposit, time deposits, bankers' acceptances and bank notes;
(ii) obligations of foreign governments; (iii) U.S. and foreign corporate debt
securities, including commercial paper, and fully-collateralized repurchase
agreements with counterparties deemed credit-worthy by the Fund's Sub-Advisers;
and (iv) securitized issues such as mortgage-backed securities, asset-backed
securities, commercial mortgage-backed securities and collateralized debt
obligations. These securities may be fixed-, variable- or floating-rate
obligations and will be rated CCC- or higher at the time of purchase by at least
one rating agency. There are no restrictions on the maturity of any individual
securities or on the Fund's average portfolio maturity, although the average
portfolio duration of the Fund will typically vary between zero and two years.

The Fund uses a multi-manager approach under the general supervision of SIMC,
which allocates the Fund's assets among multiple Sub-Advisers that use different
investment strategies designed to produce a total return that exceeds the total
return of the 3-Month London Interbank Offered Rate (LIBOR).

The Fund also invests a portion of its assets in bank loans, which are,
generally, non-investment grade (junk bond) floating rate instruments. The Fund
may invest in bank loans in the form of participations in the loans
(participations) and assignments of all or a portion of the loans from third
parties (assignments). The Fund may also invest in other financial instruments
or use other investment techniques to seek to obtain market exposure to the
securities in which the Fund primarily invests.

The Fund may also invest in futures contracts and swap agreements (also called
"swaps") for speculative or hedging purposes. Futures contracts and swaps are
used to synthetically obtain exposure to securities or baskets of securities and
to manage the Fund's interest rate duration and yield curve exposure. These
derivatives are also used to mitigate the Fund's overall level of risk and/or
the Fund's risk to particular types of securities, currencies or market
segments. Interest rate swaps are further used to manage the Fund's yield spread
sensitivity. When the Fund seeks to take an active long or short position with
respect to the likelihood of an event of default of a security or basket of
securities, the Fund may use credit default swaps. The Fund may buy credit
default swaps in an attempt to manage credit risk where the Fund has credit
exposure to an issuer, and the Fund may sell credit default swaps to more
efficiently gain credit exposure to such security or basket of securities.

Principal Risks

Asset-Backed Securities Risk - Payment of principal and interest on asset-backed
securities is dependent largely on the cash flows generated by the assets
backing the securities, and asset-backed securities may not have the benefit of
any security interest in the related assets.

Bank Loans Risk - With respect to bank loans, the Fund will assume the credit
risk of both the borrower and the lender that is selling the participation in
the loan. The Fund may also have difficulty disposing of bank loans because, in
certain cases, the market for such instruments is not highly liquid.
  
Below Investment Grade Securities Risk - Fixed income securities rated below
investment grade (junk bonds) involve greater risks of default or downgrade and
are more volatile than investment grade securities because the prospect for
repayment of principal and interest of many of these securities is speculative.

Corporate Fixed Income Securities Risk - Corporate fixed income securities
respond to economic developments, especially changes in interest rates, as well
as perceptions of the creditworthiness and business prospects of individual
issuers.

Credit Risk - The risk that the issuer of a security or the counterparty to a
contract will default or otherwise become unable to honor a financial
obligation.

Currency Risk - As a result of the Fund's investments in securities denominated
in, and/or receiving revenues in, foreign currencies, the Fund will be subject
to currency risk. Currency risk is the risk that foreign currencies will decline
in value relative to the U.S. dollar or, in the case of hedging positions, that
the U.S. dollar will decline in value relative to the currency hedged. In either
event, the dollar value of an investment in the Fund would be adversely
affected.

Derivatives Risk - The Fund's use of futures contracts and swaps is subject to
market risk, leverage risk, correlation risk and liquidity risk. Leverage risk
and liquidity risk are described below. Market risk is the risk that the market
value of an investment may move up and down, sometimes rapidly and
unpredictably. Correlation risk is the risk that changes in the value of the
derivative may not correlate perfectly with the underlying asset, rate or index.
The Fund's use of swap agreements is also subject to credit risk and valuation
risk. Valuation risk is the risk that the derivative may be difficult to value
and/or valued incorrectly. Credit risk is described above. Each of these risks
could cause the Fund to lose more than the principal amount invested in a
derivative instrument.

Extension Risk - The risk that rising interest rates may extend the duration of
a fixed income security, typically reducing the security's value.

Fixed Income Market Risk - The prices of the Fund's fixed income securities
respond to economic developments, particularly interest rate changes, as well as
to perceptions about the creditworthiness of individual issuers, including
governments and their agencies. In the case of foreign securities, price
fluctuations will reflect international economic and political events, as well
as changes in currency valuations relative to the U.S. dollar.

Foreign Investment/Emerging Markets 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. These additional risks may be heightened with respect to
emerging market countries since political turmoil and rapid changes in economic
conditions are more likely to occur in these countries.

Interest Rate Risk - The risk that the value of fixed income securities,
including U.S. Government securities, will fall due to rising interest rates.

Investment Style Risk - The risk that short-duration fixed income securities may
underperform other segments of the fixed income markets or the fixed income
markets as a whole.
  
Leverage Risk - The use of leverage can amplify the effects of market volatility
on the Fund's share price and may also cause the Fund to liquidate portfolio
positions when it would not be advantageous to do so in order to satisfy its
obligations.

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.

Mortgage-Backed Securities Risk - Mortgage-backed securities are affected by,
among other things, interest rate changes and the possibility of prepayment of
the underlying mortgage loans. Mortgage-backed securities are also subject to
the risk that underlying borrowers will be unable to meet their obligations.

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.

Prepayment Risk - The risk that, with declining interest rates, fixed income
securities with stated interest rates may have the principal paid earlier than
expected, requiring the Fund to invest the proceeds at generally lower interest
rates.

U.S. Government Securities Risk - Although U.S. Government securities are
considered to be among the safest investments, they are not guaranteed against
price movements due to changing interest rates. Obligations issued by some U.S.
Government agencies are backed by the U.S. Treasury, while others are backed
solely by the ability of the agency to borrow from the U.S. Treasury or by the
agency's own resources.

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 each calendar year since inception and by showing how the
Fund's average annual returns for 1 and 5 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   
   6.93%       -19.59%   
  06/30/09     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 ENHANCED INCOME FUND	Average Annual Returns, Label	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, Since Inception	Average Annual Returns, Inception Date
Class G	Class A Return Before Taxes	0.25%	(2.73%)	(1.99%)	Jul. 27, 2006
Class G After Taxes on Distributions	Class A Return After Taxes on Distributions	(0.59%)	(3.93%)	(3.24%)	Jul. 27, 2006
Class G After Taxes on Distributions and Sales	Class A Return After Taxes on Distributions and Sale of Fund Shares	0.16%	(2.96%)	(2.36%)	Jul. 27, 2006
BofA Merrill Lynch 3-Month LIBOR Constant Maturity Index Return	BofA Merrill Lynch 3-Month LIBOR Constant Maturity Index Return (reflects no deduction for fees, expenses or taxes)	0.27%	2.19%	2.45%	Jul. 27, 2006	[1]

[1] Index returns are shown from July 31, 2006.