Investment Strategy

Jan. 28, 2026

LARGE CAP FUND - Class F Prospectus | SIMT Large Cap Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Large Cap Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of large companies. For purposes of this Fund, a large company is a company with a market capitalization in the range of companies in the Russell 1000 Index (between $1.0 billion and $4.5 trillion as of December 31, 2025) at the time of purchase. The market capitalization range and the composition of the Russell 1000 Index are subject to change. The Fund will invest

primarily in common stocks, preferred stocks, warrants, American Depositary Receipts (ADRs), real estate investment trusts (REITs) and exchange-traded funds (ETFs). The Fund may also, to a lesser extent, invest in common and preferred stocks of small and medium capitalization companies. The Fund may invest up to 20% of its assets in foreign securities.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies and strategies to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

LARGE CAP VALUE FUND - Class F Prospectus | SIMT LARGE CAP VALUE FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Large Cap Value Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of large companies. The Fund will primarily seek to purchase securities believed to be attractively valued in relation to various measures, which may include earnings, capital structure or return on invested capital. For purposes of this Fund, a large company is a company with a market capitalization in the range of companies in the Russell 1000 Value Index

(between $1.0 billion and $3.8 trillion as of December 31, 2025) at the time of purchase. The market capitalization range and the composition of the Russell 1000 Value Index are subject to change. The Fund will invest primarily in common stocks, preferred stocks, warrants, American Depositary Receipts (ADRs), real estate investment trusts (REITs) and exchange-traded funds (ETFs). The Fund may also, to a lesser extent, invest in common and preferred stocks of small and medium capitalization companies. The Fund may invest up to 20% of its assets in foreign securities.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies and strategies to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

LARGE CAP GROWTH FUND - Class F Prospectus | SIMT LARGE CAP GROWTH FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Large 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 large companies. The Fund will primarily seek to purchase securities believed to have attractive growth and appreciation potential. For purposes of this Fund, a large company is a company with a market capitalization in the range of companies in the Russell 1000 Growth Index (between $1.0 billion and $4.5 trillion as of December 31, 2025) at the time of

purchase. The market capitalization range and the composition of the Russell 1000 Growth Index are subject to change. The Fund will invest primarily in common stocks, preferred stocks, warrants, American Depositary Receipts (ADRs), real estate investment trusts (REITs) and exchange-traded funds (ETFs), as well as forward contracts and swaps for hedging and speculative purposes. The Fund may also, to a lesser extent, invest in common and preferred stocks of small and medium capitalization companies. The Fund may invest up to 20% of its assets in foreign securities.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies and strategies to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Sub-Adviser(s) may implement a long/short equity investment strategy by investing in securities, including through forwards and swaps on individual securities or baskets of securities, believed to offer capital appreciation opportunities while also attempting to take advantage of an anticipated decline in the price of a company. A long/short equity investment strategy takes (i) long positions with respect to investments that are believed to be undervalued relative to their potential and likely to increase in price, and (ii) short positions with respect to investments that are believed to have significant risk of decreasing in price. The Sub-Adviser(s) seek returns from strong security selection on both the long and short sides. These long and short positions may be completely unrelated.

The Fund implements the investment recommendations of SIMC and certain of the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each such Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the applicable Sub-Advisers and SIMC, with the weighting of each such Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

LARGE CAP INDEX FUND - Class F Prospectus | SIMT Large Cap Index Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Fund is managed using a passive investment approach designed to track, before fees and expenses, the performance of the Russell 1000 Index (the Index). Under normal circumstances, the Fund will invest substantially all of its assets (at least 80% of its net assets, plus the amount of any borrowings for investment purposes) in securities (mostly common stocks) of companies that are included in the Index. The Index

measures the performance of the large-cap segment of the U.S. equity universe and includes approximately 1000 of the largest securities based on their market capitalization. As of December 31, 2025, the market capitalization of the companies included in the Index ranged from $1.0 billion to $4.5 trillion. The market capitalization range and the composition of the Index are subject to change. The Fund may become "non-diversified," as defined in the Investment Company Act of 1940, as amended (the 1940 Act), as a result of a change in relative market capitalization or index weighting of one or more constituents of the Index.

The Fund's sub-adviser (the Sub-Adviser) selects the Fund's securities under the general supervision of SEI Investments Management Corporation (SIMC or the Adviser). The Sub-Adviser's passive investment strategy seeks to track, before fees and expenses, the return of the index, and therefore differs from an "active" investment strategy where an investment manager buys and sells securities based on its own economic, market or financial analyses. The Sub-Adviser generally will attempt to invest in securities composing the Index in approximately the same proportions as they are represented in the Index (i.e., among other reasons, the Fund could experience high volumes of cash flows or a particular security could be difficult to obtain). In some cases, it may not be possible or practicable to purchase all of the securities composing the Index or to hold them in the same weightings as they are represented in the Index. In those circumstances, the Sub-Adviser may purchase a sampling of stocks in the Index in proportions expected to replicate generally the performance of the Index as a whole and may also use futures contracts to obtain exposure to the equity markets or to a particular security.

The Sub-Adviser may sell securities that are represented in the Index or purchase securities that are not represented in the Index, prior to or after their removal or addition to the Index.

The Fund's investment performance will depend on the Fund's tracking of the Index and the performance of the Index. The Fund's ability to replicate the performance of the 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. Due to these differences, the Fund's performance generally will not be identical to that of the Index.

TAX-MANAGED LARGE CAP FUND - Class F Prospectus | SIMT TAX-MANAGED LARGE CAP FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Tax-Managed Large Cap Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of large companies. For purposes of this Fund, a large company is a company with a market capitalization in the range of companies in the Russell 1000 Index (between $1.0 billion and $4.5 trillion as of December 31, 2025) at the time of purchase. The market capitalization range and the composition of the Russell 1000 Index are subject to change. The

Fund will invest primarily in common stocks, preferred stocks, warrants, American Depositary Receipts (ADRs), real estate investment trusts (REITs) and exchange-traded funds (ETFs). The Fund may also, to a lesser extent, invest in common and preferred stocks of small and medium capitalization companies. The Fund may invest up to 20% of its assets in foreign securities.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies and strategies to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models, primarily for the purpose of efficient tax management of the Fund's securities transactions. The overlay manager seeks to manage the impact of taxes by, among other things, selling stocks with the highest tax cost first, opportunistically harvesting losses and deferring recognition of taxable gains, where possible. SIMC may also direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

S&P 500 INDEX FUND - Class F Prospectus | SIMT S&P 500 Index Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Fund invests substantially all of its assets (at least 80%) in securities listed in the Standard & Poor's 500 Composite Stock Price Index (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's investment results are expected to correspond to the aggregate price and dividend performance of the S&P 500 Index before the

fees and expenses of the Fund. The Fund generally gives the same weight to a given stock as the S&P 500 Index does. The Fund may become "non-diversified," as defined in the Investment Company Act of 1940, as amended (the 1940 Act), as a result of a change in relative market capitalization or index weighting of one or more constituents of the S&P 500 Index.

In seeking to replicate the performance of the S&P 500 Index, the Fund may also invest in futures contracts, American Depositary Receipts (ADRs), real estate investment trusts (REITs) and exchange-traded funds (ETFs). The Fund may also invest a portion of its assets in securities of companies located in developed foreign countries and securities of small and medium 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 Fund may use futures contracts to obtain exposure to the equity market during high volume periods of investment into the Fund. The Fund's sub-adviser (the Sub-Adviser) selects the Fund's securities under the general supervision of the Fund's adviser, SEI Investments Management Corporation (SIMC or the Adviser), 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.

SMALL CAP FUND - Class F Prospectus | SIMT Small Cap Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Small Cap Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities (both common and preferred stocks) of small companies, including exchange-traded funds (ETFs) based on small capitalization indexes and securities of real estate investment trusts (REITs). For purposes of this Fund, a small company is a company with a market

capitalization in the range of companies in the Russell 2000 Index (between $1.3 million and $31.3 billion as of December 31, 2025), as determined at the time of purchase. The market capitalization range and the composition of the Russell 2000 Index are subject to change. The Fund may also invest in warrants and, to a lesser extent, in securities of large capitalization companies. Due to its investment strategy, the Fund may buy and sell securities and other instruments frequently.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and certain of its Sub-Advisers through the use of an overlay manager appointed by SIMC. Each applicable Sub-Adviser and SIMC provide a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for its portion of the Fund that represents the aggregation of the model portfolios of the applicable Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

SMALL CAP VALUE FUND - Class F Prospectus | SIMT SMALL CAP VALUE FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Small Cap Value 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. The Fund will primarily seek to purchase securities believed to be attractively valued in relation to various measures, which may include earnings, capital structure or return on invested capital. For purposes of this Fund, a small

company is a company with a market capitalization in the range of companies in the Russell 2000 Index (between $1.3 million and $31.3 billion as of December 31, 2025), as determined at the time of purchase. The market capitalization range and the composition of the Russell 2000 Index are subject to change. The Fund's investments in equity securities may include common and preferred stocks, warrants, and, to a lesser extent, real estate investment trusts (REITs), exchange-traded funds (ETFs) and securities of large capitalization companies.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

SMALL CAP GROWTH FUND - Class F Prospectus | SIMT SMALL CAP GROWTH FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

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. The Fund will primarily seek to purchase securities believed to have attractive growth and appreciation potential. For purposes of this Fund, a small company is a company with a market capitalization in the range of companies in the Russell 2000 Index (between $1.3 million and $31.3 billion as of December 31, 2025), as determined at

the time of purchase. The market capitalization range and the composition of the Russell 2000 Index are subject to change. The Fund's investments in equity securities may include common and preferred stocks, warrants and, to a lesser extent, real estate investment trusts (REITs), exchange-traded funds (ETFs) and securities of large capitalization companies. Due to its investment strategy, the Fund may buy and sell securities and other instruments frequently.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

TAX-MANAGED SMALL/MID CAP FUND - Class F Prospectus | SIMT TAX-MANAGED SMALL/MID CAP FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Tax-Managed Small/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 small and medium capitalization companies. For purposes of this Fund, a small or medium capitalization company is a company with a market capitalization in the range of companies in the Russell 2500 Index (between approximately $1.3 million and $37.0 billion as of December 31, 2025) at the time of purchase. The market capitalization

range and the composition of the Russell 2500 Index are subject to change. The Fund's investments in equity securities may include common and preferred stocks, warrants and, to a lesser extent, real estate investment trusts (REITs), exchange-traded funds (ETFs) and securities of large capitalization companies.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies and strategies to manage Fund assets under the general supervision of SIMC. In managing assets of the Fund not allocated to Sub-Advisers, SIMC may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models, primarily for the purpose of efficient tax management of the Fund's securities transactions. The overlay manager seeks to manage the impact of taxes by, among other things, selling stocks with the highest tax cost first, opportunistically harvesting losses and deferring recognition of taxable gains, where possible. SIMC may also direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

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

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

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.

U.S. MANAGED VOLATILITY FUND - Class F Prospectus | SIMT US MANAGED VOLATILITY FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the U.S. Managed Volatility Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in securities of U.S. companies of all capitalization

ranges. These securities may include common stocks, preferred stocks, exchange-traded funds (ETFs) and warrants. The Fund may also, to a lesser extent, invest in American Depositary Receipts (ADRs), real estate investment trusts (REITs) and securities of non-U.S. companies.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC. The Fund seeks to achieve an absolute return of the broad U.S. equity markets, but with a lower absolute volatility. Over the long term, the Fund seeks to achieve a return similar to that of the Russell 3000 Index, but with a lower level of volatility. However, given that the Fund's investment strategy focuses on absolute return and risk, the Fund's sector and market capitalization exposures will typically vary from the index and may cause significant performance deviations relative to the index over shorter-term periods. The Fund seeks to achieve lower volatility by constructing a portfolio of securities that effectively weighs securities based on their total expected risk and return without regard to market capitalization and industry.

GLOBAL MANAGED VOLATILITY FUND - Class F Prospectus | SIMT GLOBAL MANAGED VOLATILITY FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Global Managed Volatility Fund will typically invest in securities of U.S. and foreign companies of all capitalization ranges. These securities may include common stocks, preferred stocks, warrants, depositary receipts, exchange-traded funds (ETFs) and real estate investment trusts (REITs). The Fund also may use futures contracts and forward contracts.

Under normal circumstances, the Fund will invest in at least three countries outside of the U.S., but will typically invest much more broadly. It is expected that at least 40% of the Fund's assets will be invested in non-U.S. securities. The Fund will invest primarily in companies located in developed countries, but may also invest in companies located in emerging markets.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC. This approach is intended to manage the risk characteristics of the Fund. The Fund seeks to achieve an absolute return of the broad global equity markets, but with a lower absolute volatility. Over the long term, the Fund seeks to achieve a return similar to that of the MSCI World Index, but with a lower level of volatility. However, given that the Fund's investment strategy focuses on absolute return and risk, the Fund's country, sector and market capitalization exposures will typically vary from the index and may cause significant performance deviations relative to the index over shorter-term periods. The Fund seeks to achieve lower volatility by constructing a portfolio of securities that the Sub-Advisers believe will produce a less volatile return than the market over time. SIMC and each Sub-Adviser effectively weighs securities based on their total expected risk and return without regard to market capitalization and industry.

In managing the Fund's currency exposure from foreign securities, the Fund may buy and sell futures or forward contracts on currencies for hedging purposes.

Tax-Managed Managed Volatility Fund - Class F Prospectus | SIMT Tax-Managed Managed Volatility Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Tax-Managed Managed Volatility Fund will typically invest in securities of U.S. companies of all capitalization ranges. These securities may include common stocks, preferred stocks, warrants and exchange-traded funds

(ETFs). The Fund may also, to a lesser extent, invest in American Depositary Receipts (ADRs), real estate investment trusts (REITs) and securities of non-U.S. companies. Although the Fund will be measured against the Russell 3000 Index, the Fund is expected to have significant sector and market capitalization deviations from the index given its focus on absolute risk as opposed to index relative risk. This could lead to significant performance deviations relative to the index over shorter-term periods.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment approaches to manage Fund assets under the general supervision of SIMC. The Fund seeks to achieve an absolute return of the broad U.S. equity markets in a tax-efficient fashion, but with a lower absolute volatility. Over the long term, the Fund seeks to achieve a return similar to that of the Russell 3000 Index, but with a lower level of volatility. However, given that the Fund's investment strategy focuses on absolute return and risk, the Fund's sector and market capitalization exposures will typically vary from the index and may cause significant performance deviations relative to the index over shorter-term periods. The Fund seeks to achieve lower volatility by constructing a portfolio of securities that effectively weighs securities based on their total expected risk and return without regard to market capitalization and industry. This will tend to lead SIMC and the Fund's Sub-Advisers to construct portfolios with a low beta relative to the overall U.S. equity market.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each such Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each such Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

Tax-Managed International Managed Volatility Fund - Class F Prospectus | SIMT Tax-Managed International Managed Volatility Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Tax-Managed International Managed Volatility Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in non-U.S. equity securities. These securities may include common stocks and real estate investment trusts (REITs) of all capitalization ranges. Under normal circumstances, the Fund will invest in securities of issuers that are located in at least

three countries outside of the U.S., but will typically invest much more broadly. The Fund will invest primarily in companies located in developed countries.

The Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach to investing, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC. This approach is intended to manage the risk characteristics of the Fund.

The Fund seeks to achieve an absolute return similar to that of the broad international developed equity markets (International Market) in a tax-sensitive manner, but with lower absolute volatility. Over the long-term, the Fund seeks to achieve a return similar to that of the MSCI EAFE Index (Index), but with a lower level of volatility. Over shorter periods of time, however, due to its focus on absolute risk, the portfolio's country, sector and market capitalization exposures will typically vary from the International Market and it may experience significant performance deviations from the International Market. The Fund seeks to achieve lower volatility by constructing a portfolio of securities that primarily exhibit a more stable historical or predicted price and earnings behavior (i.e. absolute risk), but also take into consideration low correlation attributes and expected returns. Generally, the Fund is likely to underperform in a steeply rising International Market, but seeks to mitigate losses in a falling International Market.

The Fund implements the investment recommendations of Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC. Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models, primarily for the purpose of tax management of the portfolio's securities transactions. SIMC also may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes.

The overlay manager and SIMC each seek to manage the impact of taxes by using certain techniques, which may include selling stocks with the highest tax cost basis first to realize capital losses or defer capital gains, preventing wash sales, avoiding high portfolio turnover, controlling the holding period of a security to convert short-term capital gains to long-term capital gains, and, where appropriate, opportunistically harvesting losses to offset other capital gains.

The Fund considers the security of an issuer to be "non-U.S." if the issuer is domiciled, incorporated, located and/or principally traded in a country other than the U.S. Developed market countries are those countries that are included in a developed markets index by a recognized index provider, or have similar developed characteristics, in each case determined at the time of purchase.

The Fund may purchase shares of exchange-traded funds (ETFs) to gain exposure to a particular portion of the market while awaiting an opportunity to purchase securities or other instruments directly.

REAL ESTATE FUND - Class F Prospectus | SIMT REAL ESTATE FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Real Estate Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of real estate companies (e.g., common stocks, rights, warrants, exchange-traded funds (ETFs), convertible securities and preferred stocks of real estate investment trusts (REITs) and real estate operating companies (REOCs)). Generally, the Fund will invest in real estate companies operating in the United States.

The Fund uses a multi-manager approach, relying upon a number of sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) to manage Fund assets under the general supervision of SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser).

CORE FIXED INCOME FUND - Class F Prospectus | SIMT CORE FIXED INCOME FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Core Fixed Income Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in fixed income securities. The Fund will invest primarily in investment and non-investment grade (junk bond) U.S. corporate and government fixed income securities, including asset-backed securities, mortgage dollar rolls, mortgage-backed securities (including "to-be-announced" transactions) and securities issued or guaranteed by the U.S. Government and its agencies and

instrumentalities. The Fund may invest in securities denominated in either U.S. dollars or foreign currency. Due to its investment strategy, the Fund may buy and sell securities and other instruments frequently.

The Fund uses a multi-manager approach, relying upon 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). Sub-Advisers are selected for their expertise in managing various kinds of fixed income securities, and each Sub-Adviser makes investment decisions based on an analysis of yield trends, credit ratings and other factors in accordance with its particular discipline.

The Fund may also invest in futures contracts, forward contracts, options and swaps for speculative or hedging purposes. Futures contracts, forward contracts, options and swaps may be 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 may also be 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 may further be 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 a security or basket of securities.

The Sub-Advisers may also engage in currency transactions using futures and foreign currency forward contracts either to seek to hedge the Fund's currency exposure or to enhance the Fund's returns. The Fund may take long and short positions in foreign currencies in excess of the value of the Fund's assets denominated in a particular currency or when the Fund does not own assets denominated in that currency. The Fund will invest primarily in investment grade securities (those rated AAA, AA, A and BBB-). However, the Fund may also invest in non-rated securities or securities rated below investment grade (BB+, B and CCC).

The Fund may also invest a portion of its assets in foreign securities and 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 or assignments of all or a portion of the loans from third parties.

While each Sub-Adviser chooses securities of different types and maturities, the Fund, in the aggregate, generally will have a dollar-weighted average duration that is consistent with that of the broad U.S. fixed income market, as represented by the Bloomberg U.S. Aggregate Bond Index. Duration is a measure of the expected life of a fixed income security that is used to determine the sensitivity of a security's price to changes in interest rates. For example, if a fixed income security has a five-year duration, it will decrease in value by approximately 5% if interest rates rise 1% and increase in value by approximately 5% if interest rates fall 1%. Fixed income instruments with higher duration typically have higher risk and higher volatility.

The dollar-weighted average duration of the Bloomberg U.S. Aggregate Bond Index varies significantly over time, but as of December 31, 2025 it was 5.98 years.

HIGH YIELD BOND FUND - Class F Prospectus | SIMT HIGH YIELD BOND FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the High Yield Bond Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in high yield fixed income securities. The Fund will invest primarily in fixed income securities rated below investment grade (junk bonds), including corporate bonds and debentures, convertible and preferred securities, zero coupon obligations and tranches of collateralized debt obligations (CDOs) and collateralized loan obligations (CLOs).

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC. In managing the Fund's assets, the Sub-Advisers and, to the extent applicable, SIMC, seek to select securities that offer a high current yield as well as total return potential. The Fund seeks to have a portfolio of securities that is diversified as to issuers and industries. The Fund's average weighted maturity may vary, but will generally not exceed ten years. There is no limit on the maturity or credit quality of any individual security in which the Fund may invest.

As noted above, the Fund will invest primarily in securities rated BB, B, CCC, CC, C and D. However, it may also invest in non-rated securities or securities rated investment grade (AAA, AA, A and BBB). The Fund may also invest in exchange-traded funds (ETFs) to gain exposure to a particular portion of the market while awaiting an opportunity to purchase securities directly. The Fund may also invest 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 or assignments of all or a portion of the loans from third parties.

The Fund may also invest in futures contracts, options and swaps for speculative or hedging purposes. Futures, options 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.

CONSERVATIVE INCOME FUND - Class F Prospectus | SIMT Conservative Income Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Conservative Income Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in U.S. dollar-denominated debt securities that the Fund's sub-adviser (the Sub-Adviser) believes present minimal credit risks to the Fund.

Under normal market conditions, the Fund will primarily invest in short-term US dollar denominated debt securities, including: (i) commercial paper, corporate bonds and asset-based securities of U.S. and foreign

issuers; (ii) certificates of deposit, time deposits, bankers' acceptances, bank notes, and other obligations of U.S. savings and loan and thrift institutions, US banks or US branches or non-US branches of foreign banks; (iii) short-term obligations issued by state and local governments; (iv) U.S. Treasury obligations and obligations issued or guaranteed as to principal and interest by agencies or instrumentalities of the U.S. Government; and (v) obligations of foreign governments (including Canadian and Provincial Government and Crown Agency obligations). The Fund may also enter into fully-collateralized repurchase agreements. Although the Fund may invest in securities with any maturity or duration, the Fund generally seeks to maintain a weighted average maturity of 90 days or less.

Under normal circumstances, the Fund will invest at least 25% of its assets in securities issued by companies in the financial services industry, but may invest less than 25% of its assets in this industry as a temporary defensive measure.

The Fund uses a Sub-Adviser to manage Fund assets under the general supervision of SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser). Through analysis of both macroeconomic factors and individual company attributes, the Sub-Adviser seeks to invest in securities that are marketable and liquid, offer competitive yields, and are of issuers that represent low credit risk. In selecting securities, the Sub-Adviser also considers factors such as the anticipated level of interest rates and the maturity of individual securities relative to the maturity of the Fund as a whole.

The Fund is not a money market fund and does not seek to maintain a stable net asset value.

TAX-FREE CONSERVATIVE INCOME FUND - Class F Prospectus | SIMT Tax-Free Conservative Income Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Tax-Free Conservative Income Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in US dollar-denominated municipal securities that the Fund's sub-adviser (the Sub-Adviser) believes present minimal credit risks to the Fund and that pay interest that (i) is exempt from federal income taxes and (ii) is not taxable under the federal alternative

minimum tax applicable to individuals. The principal issuers of these securities are state and local governments and their agencies located in any of the fifty states, the District of Columbia, Puerto Rico and other U.S. territories and possessions.

Under normal market conditions, the Fund will primarily invest in short-term US dollar-denominated debt securities including: US municipal bonds, notes, variable rate demand notes, tender option bonds, floating rate notes, industrial development bonds, pre-refunded bonds and commercial paper. The Fund may also, to a limited extent, invest in repurchase agreements and securities subject to the alternative minimum tax or in debt securities subject to federal income tax. Although the Fund may invest in securities with any maturity or duration, the Fund generally seeks to maintain a weighted average maturity of 90 days or less.

The Fund uses a Sub-Adviser to manage Fund assets under the general supervision of SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser). Through analysis of both macroeconomic factors and individual company attributes, the Sub-Adviser seeks to invest in securities that are marketable and liquid, offer competitive yields, and are of issuers that represent low credit risk. In selecting securities, the Sub-Adviser considers factors such as the anticipated level of interest rates and the maturity of individual securities relative to the maturity of the Fund as a whole.

The Fund is not a money market fund and does not seek to maintain a stable net asset value.

REAL RETURN FUND - Class F Prospectus | SIMT Real Return Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Real Return Fund seeks to produce a return similar to that of the Bloomberg 1-5 Year U.S. Treasury Inflation-Protected Securities (TIPS) Index, which is the Fund's benchmark index.

Under normal circumstances, the Fund will invest a significant portion of its assets in investment grade fixed income securities, including inflation-indexed bonds of varying maturities issued by the U.S. Treasury, other U.S. Government agencies and instrumentalities. An inflation-indexed bond is a bond that is structured so

that its principal value will change with inflation. TIPS are a type of inflation-indexed bond in which the Fund may invest. The Fund's exposure to fixed income securities is not restricted by maturity requirements.

The Fund may also invest in 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 time deposits, U.S. and foreign corporate debt including commercial paper; and securitized issues, such as mortgage-backed securities issued by U.S. Government agencies. Although the Real Return Fund is able to use a multi-manager approach under the general supervision of SEI Investments Management Corporation (SIMC or the Adviser) whereby Fund assets would be allocated among multiple sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers), the Fund's assets currently are managed directly by SIMC.

DYNAMIC ASSET ALLOCATION FUND - Class F Prospectus | SIMT Dynamic Asset Allocation Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Fund employs a dynamic investment strategy seeking to achieve, over time, a total return in excess of the broad U.S. equity market by selecting investments from among a broad range of asset classes or market exposures based upon SEI Investments Management Corporation's (SIMC or the Adviser) expectations of risk and return. Asset classes or market exposures in which the Fund may invest include U.S. and foreign equities and bonds, currencies, and investment exposures to various market characteristics such as interest rates or volatility. SIMC directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC, as discussed below.

The asset classes and market exposures used, and the Fund's allocations among them, are determined based on SIMC's views of fundamental, technical or valuation measures and may be dynamically adjusted (i.e. actively adjusted over long or short periods of time). The Fund may at any particular point in time be diversified across many exposures or concentrated in a limited number of exposures, including, possibly, a single asset class or market exposure.

Although the Fund will seek to achieve excess total return through its dynamic investment selection, it will also normally maintain, as a primary component of its strategy, passive exposure to the large capitalization U.S. equity market. To the extent that the Fund is not dynamically invested in other asset classes or market exposures, the Fund's assets will generally be passively invested in a portfolio of securities designed to track, before fees and expenses, the performance of the large capitalization U.S. equity market. This passive exposure to the large capitalization U.S. equity market is implemented by the Sub-Adviser.

The Fund may obtain asset class or market exposures by investing directly (e.g., in equity and fixed income securities and other instruments) or indirectly (e.g., through the use of other pooled investment vehicles, a wholly-owned subsidiary or derivative instruments, principally futures contracts, forward contracts, options and swaps). The particular types of securities and other instruments in which the Fund may invest are further described below.

Equity Securities. The Fund may invest in equity securities, including common stocks, preferred stocks, convertible securities, warrants (including equity-linked warrants) and depositary receipts of U.S. and non-U.S. issuers (including emerging markets) of various market capitalizations and industries.

Fixed Income Securities. The Fund may invest in fixed income securities that are investment or non-investment grade (also known as "junk bonds"), U.S.- or foreign-issued (including emerging markets), and corporate- or government-issued. The Fund's fixed income investments may include mortgage-backed securities, corporate bonds and debentures, commercial paper, money market instruments, mortgage dollar rolls, repurchase and reverse repurchase agreements, zero coupon bonds, structured notes, obligations of foreign governments, and obligations of either supranational entities issued or guaranteed by certain banks and entities organized to restructure the outstanding debt of such issuers.

The Fund's fixed income investments may also include U.S. Treasury obligations, obligations issued by agencies or instrumentalities of the U.S. Government and Treasury Inflation Protected Securities (TIPS) and other inflation-linked debt securities of both U.S. and non-U.S. governments and corporations.

The Fund may invest in fixed, variable and floating rate fixed income instruments. The Fund's portfolio and the Fund's investments in particular fixed income securities are not subject to any maturity or duration restrictions.

Other Instruments. The Fund may also invest in real estate investment trusts (REITs) and securities issued by U.S. and non-U.S. real estate companies.

Pooled Investment Vehicles. In addition to direct investment in securities and other instruments, the Fund may invest in affiliated and unaffiliated funds, including open-end funds, money market funds, closed-end funds and exchange-traded funds (ETFs), to obtain the Fund's desired exposure to a particular asset class.

Derivative and Commodity Instruments. The Fund may also purchase or sell futures contracts, forward contracts, options and swaps (including swaptions, caps, floors or collars) for return enhancement or hedging purposes or to obtain the Fund's desired exposure to a particular asset class or market exposure. Futures contracts, forward contracts and swaps may be 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 may also be used to mitigate the Fund's overall level of risk and/or the Fund's exposure to the risk of particular types of securities or market segments. The Fund may purchase or sell futures contracts (and options on futures contracts) on U.S. Government securities for return enhancement and hedging purposes. The Fund may purchase and sell forward contracts on currencies or securities for return enhancement and hedging purposes. Interest rate swaps are further used to manage the Fund's yield spread sensitivity.

Swaps may be used for return enhancement or hedging purposes. Securities index and single security swaps may be used to manage the inflation-adjusted return of the Fund or to more efficiently gain exposure to a particular security or basket of securities. 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 a security or basket of securities. The Fund may also, to a lesser extent, purchase or sell put or call options on securities, indexes or currencies for return enhancement or hedging purposes or to obtain the Fund's desired exposure to a particular asset class or market exposure.

The Fund may seek to gain exposure to the commodity markets, in whole or in part, through investments in a wholly owned subsidiary of the Fund organized under the laws of the Cayman Islands (Subsidiary). The Subsidiary, unlike the Fund, may invest to a significant extent in commodities, commodity contracts, commodity investments and commodity-linked derivative instruments. The Subsidiary may also invest in other instruments in which the Fund is permitted to invest, either as investments or to serve as margin or collateral for its derivative positions. The Fund may invest up to 25% of its total assets in the Subsidiary. The Subsidiary is advised by SIMC.

Currency Exposure. The Fund may invest in U.S. dollar and non-U.S. dollar denominated securities. The Fund may also seek to enhance its return by actively managing the Fund's foreign currency exposure. In managing the Fund's currency exposure, the Fund may buy and sell currencies (i.e., take long or short positions) using futures, options and foreign currency forward contracts. The Fund may take long and short positions in foreign currencies in excess of the value of the Fund's assets denominated in a particular currency or when the Fund does not own assets denominated in that currency. The Fund may also engage in currency transactions in an attempt to take advantage of certain inefficiencies in the currency exchange market, to increase its exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one currency to another. In managing its currency exposure from foreign securities, the Fund may buy and sell currencies for hedging or for speculative purposes.

Short Sales. The Fund may engage in short sales on equity securities that are expected to underperform the market or their peers. When the Sub-Adviser sells securities short, it may invest the proceeds from the short sales in an attempt to enhance returns. This strategy may effectively result in the Fund having a leveraged investment portfolio, which results in greater potential for loss.

MULTI-STRATEGY ALTERNATIVE FUND - Class F Prospectus | SIMT Multi-Strategy Alternative Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Multi-Strategy Alternative Fund employs a strategy intended to generate an absolute (i.e., positive) return in various market cycles with reduced correlation to the stock and bond markets. The Fund allocates its assets among a variety of investment strategies through the use of: (i) affiliated and unaffiliated funds, including open-end funds, closed-end funds and exchange traded funds (Underlying Funds); and/or (ii) one or more investment sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers). In addition, SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets, which may include allocating assets to investments in Underlying Funds selected by SIMC. The Underlying Funds or Sub-Advisers that are employed may apply any of a variety of investment strategies, which may include: (i) directional or tactical strategies, such as long/short equity, long/short credit and global tactical asset allocation; (ii) event driven strategies, such as distressed securities, special situations and merger arbitrage; and (iii) arbitrage strategies, such as fixed income or interest rate arbitrage, convertible arbitrage, pairs trading and equity market neutral.

The Fund will allocate its assets among Underlying Funds and/or Sub-Advisers based on SIMC's analysis of their investment strategies and historical performance as well as SIMC's analysis of the potential for each to perform independently of one another. By allocating its assets in this manner, the Fund will seek to reduce risk, lower volatility and achieve positive returns in various market cycles. Allocation of assets to any one Underlying Fund, Sub-Adviser or strategy will vary based on market conditions. By investing in an Underlying Fund, the Fund becomes a shareholder of that Underlying Fund. Underlying Funds and Sub-Advisers may invest in a broad range of asset classes, securities and other investments to achieve their designated investment strategies, which may include U.S., foreign and emerging markets securities, equity securities of all types and capitalization ranges, investment and non-investment grade fixed income securities (junk bonds) of any duration or maturity issued by corporations or governments, bank loans in the form of participations in the loans or assignments of all or a portion of the loans from third parties, commodities, currencies, warrants, depositary receipts, exchange traded notes and derivative instruments, principally, equity options, futures contracts, options on futures contracts, forward contracts, swap agreements and credit default swaps. In addition, the Fund may invest in cash, money market instruments and other short-term obligations to achieve its investment goal. Due to its investment strategy, the Fund may buy and sell securities and other instruments frequently.

The Fund currently allocates assets to Sub-Advisers pursuant to SIMC's "manager of managers" model, and the Sub-Advisers manage Fund assets under the general supervision of SIMC.

The Fund is intended to be only one component of an investor's broader investment program and is not designed to be a complete investment program. Investors who seek to add an alternative component to their overall investment program may wish to allocate a portion of their investment to the Fund.

LARGE CAP FUND - Class I Prospectus | SIMT Large Cap Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Large Cap Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of large companies. For purposes of this Fund, a large company is a company with a market capitalization in the range of companies in the Russell 1000 Index (between $1.0 billion and $4.5 trillion as of December 31, 2025) at the time of purchase. The market capitalization range and the composition of the Russell 1000 Index are subject to change. The Fund will invest

primarily in common stocks, preferred stocks, warrants, American Depositary Receipts (ADRs), real estate investment trusts (REITs) and exchange-traded funds (ETFs). The Fund may also, to a lesser extent, invest in common and preferred stocks of small and medium capitalization companies. The Fund may invest up to 20% of its assets in foreign securities.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies and strategies to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

LARGE CAP VALUE FUND - Class I Prospectus | SIMT LARGE CAP VALUE FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Large Cap Value Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of large companies. The Fund will primarily seek to purchase securities believed to be attractively valued in relation to various measures, which may include earnings, capital structure or return on invested capital. For purposes of this Fund, a large company is a company with a market capitalization in the range of companies in the Russell 1000 Value Index

(between $1.0 billion and $3.8 trillion as of December 31, 2025) at the time of purchase. The market capitalization range and the composition of the Russell 1000 Value Index are subject to change. The Fund will invest primarily in common stocks, preferred stocks, warrants, American Depositary Receipts (ADRs), real estate investment trusts (REITs) and exchange-traded funds (ETFs). The Fund may also, to a lesser extent, invest in common and preferred stocks of small and medium capitalization companies. The Fund may invest up to 20% of its assets in foreign securities.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies and strategies to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

LARGE CAP GROWTH FUND - Class I Prospectus | SIMT LARGE CAP GROWTH FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Large 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 large companies. The Fund will primarily seek to purchase securities believed to have attractive growth and appreciation potential. For purposes of this Fund, a large company is a company with a market capitalization in the range of companies in the Russell 1000 Growth Index (between $1.0 billion and $4.5 trillion as of December 31, 2025) at the time of

purchase. The market capitalization range and the composition of the Russell 1000 Growth Index are subject to change. The Fund will invest primarily in common stocks, preferred stocks, warrants, American Depositary Receipts (ADRs), real estate investment trusts (REITs) and exchange-traded funds (ETFs), as well as forward contracts and swaps for hedging and speculative purposes. The Fund may also, to a lesser extent, invest in common and preferred stocks of small and medium capitalization companies. The Fund may invest up to 20% of its assets in foreign securities.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies and strategies to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Sub-Adviser(s) may implement a long/short equity investment strategy by investing in securities, including through forwards and swaps on individual securities or baskets of securities, believed to offer capital appreciation opportunities while also attempting to take advantage of an anticipated decline in the price of a company. A long/short equity investment strategy takes (i) long positions with respect to investments that are believed to be undervalued relative to their potential and likely to increase in price, and (ii) short positions with respect to investments that are believed to have significant risk of decreasing in price. The Sub-Adviser(s) seek returns from strong security selection on both the long and short sides. These long and short positions may be completely unrelated.

The Fund implements the investment recommendations of SIMC and certain of the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each such Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the applicable Sub-Advisers and SIMC, with the weighting of each such Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

S&P 500 Index Fund - Class I Prospectus | SIMT S&P 500 Index Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Fund invests substantially all of its assets (at least 80%) in securities listed in the Standard & Poor's 500 Composite Stock Price Index (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's investment results are expected to correspond to the aggregate price and dividend performance of the S&P 500 Index

before the fees and expenses of the Fund. The Fund generally gives the same weight to a given stock as the S&P 500 Index does. The Fund may become "non-diversified," as defined in the Investment Company Act of 1940, as amended (the 1940 Act), as a result of a change in relative market capitalization or index weighting of one or more constituents of the S&P 500 Index.

In seeking to replicate the performance of the S&P 500 Index, the Fund may also invest in futures contracts, American Depositary Receipts (ADRs), real estate investment trusts (REITs) and exchange-traded funds (ETFs). The Fund may also invest a portion of its assets in securities of companies located in developed foreign countries and securities of small and medium 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 Fund may use futures contracts to obtain exposure to the equity market during high volume periods of investment into the Fund. The Fund's sub-adviser (the Sub-Adviser) selects the Fund's securities under the general supervision of the Fund's adviser, SEI Investments Management Corporation (SIMC or the Adviser), 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.

SMALL CAP FUND - Class I Prospectus | SIMT Small Cap Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Small Cap Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities (both common and preferred stocks) of small companies, including exchange-traded funds (ETFs) based on small capitalization indexes and securities of real estate investment trusts (REITs). For purposes of this Fund, a small company is a company with a market capitalization in the range of companies in the Russell 2000 Index (between $1.3 million and $31.3 billion as

of December 31, 2025), as determined at the time of purchase. The market capitalization range and the composition of the Russell 2000 Index are subject to change. The Fund may also invest in warrants and, to a lesser extent, in securities of large capitalization companies. Due to its investment strategy, the Fund may buy and sell securities and other instruments frequently.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and certain of its Sub-Advisers through the use of an overlay manager appointed by SIMC. Each applicable Sub-Adviser and SIMC provide a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for its portion of the Fund that represents the aggregation of the model portfolios of the applicable Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

SMALL CAP VALUE FUND - Class I Prospectus | SIMT SMALL CAP VALUE FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Small Cap Value 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. The Fund will primarily seek to purchase securities believed to be attractively valued in relation to various measures, which may include earnings, capital structure or return on invested capital. For purposes of this Fund, a small company is a company with a market capitalization in the range of companies in the Russell 2000 Index

(between $1.3 million and $31.3 billion as of December 31, 2025), as determined at the time of purchase. The market capitalization range and the composition of the Russell 2000 Index are subject to change. The Fund's investments in equity securities may include common and preferred stocks, warrants, and, to a lesser extent, real estate investment trusts (REITs), exchange-traded funds (ETFs) and securities of large capitalization companies.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

SMALL CAP GROWTH FUND - Class I Prospectus | SIMT SMALL CAP GROWTH FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

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. The Fund will primarily seek to purchase securities believed to have attractive growth and appreciation potential. For purposes of this Fund, a small company is a company with a market capitalization in the range of companies in the Russell 2000 Index (between $1.3 million and $31.3 billion as of December 31, 2025), as determined at

the time of purchase. The market capitalization range and the composition of the Russell 2000 Index are subject to change. The Fund's investments in equity securities may include common and preferred stocks, warrants and, to a lesser extent, real estate investment trusts (REITs), exchange-traded funds (ETFs) and securities of large capitalization companies. Due to its investment strategy, the Fund may buy and sell securities and other instruments frequently.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

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

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

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.

U.S. MANAGED VOLATILITY FUND - Class I Prospectus | SIMT US MANAGED VOLATILITY FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the U.S. Managed Volatility Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in securities of U.S. companies of all capitalization ranges. These securities may include common stocks, preferred stocks, exchange-traded funds (ETFs) and warrants. The Fund may also, to a lesser extent, invest in American Depositary Receipts (ADRs), real estate investment trusts (REITs) and securities of non-U.S. companies.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC. The Fund seeks to achieve an absolute return of the broad U.S. equity markets, but with a lower absolute volatility. Over the long term, the Fund seeks to achieve a return similar to that of the Russell 3000 Index, but with a lower level of volatility. However, given that the Fund's investment strategy focuses on absolute return and risk, the Fund's sector and market capitalization exposures will typically vary from the index and may cause significant performance deviations relative to the index over shorter-term periods. The Fund seeks to achieve lower volatility by constructing a portfolio of securities that effectively weighs securities based on their total expected risk and return without regard to market capitalization and industry.

GLOBAL MANAGED VOLATILITY FUND - Class I Prospectus | SIMT GLOBAL MANAGED VOLATILITY FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Global Managed Volatility Fund will typically invest in securities of U.S. and foreign companies of all capitalization ranges. These securities may include common stocks, preferred stocks, warrants, depositary receipts, exchange-traded funds (ETFs) and real estate investment trusts (REITs). The Fund also may use futures contracts and forward contracts.

Under normal circumstances, the Fund will invest in at least three countries outside of the U.S., but will typically invest much more broadly. It is expected that at least 40% of the Fund's assets will be invested in non-U.S. securities. The Fund will invest primarily in companies located in developed countries, but may also invest in companies located in emerging markets.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC. This approach is intended to manage the risk characteristics of the Fund. The Fund seeks to achieve an absolute return of the broad global equity markets, but with a lower absolute volatility. Over the long term, the Fund seeks to achieve a return similar to that of the MSCI World Index, but with a lower level of volatility. However, given that the Fund's investment strategy focuses on absolute return and risk, the Fund's country, sector and market capitalization exposures will typically vary from the index and may cause significant performance deviations relative to the index over shorter-term periods. The Fund seeks to achieve lower volatility by constructing a portfolio of securities that the Sub-Advisers believe will produce a less volatile return than the market over time. SIMC and each Sub-Adviser effectively weighs securities based on their total expected risk and return without regard to market capitalization and industry.

In managing the Fund's currency exposure from foreign securities, the Fund may buy and sell futures or forward contracts on currencies for hedging purposes.

REAL ESTATE FUND - Class I Prospectus | SIMT REAL ESTATE FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Real Estate Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of real estate companies (e.g., common stocks, rights, warrants, exchange-traded funds (ETFs), convertible securities and preferred stocks of real estate investment trusts (REITs) and real estate operating companies (REOCs)). Generally, the Fund will invest in real estate companies operating in the United States.

The Fund uses a multi-manager approach, relying upon a number of sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) to manage Fund assets under the general supervision of SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser).

CORE FIXED INCOME FUND - Class I Prospectus | SIMT CORE FIXED INCOME FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Core Fixed Income Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in fixed income securities. The Fund will invest primarily in investment and non-investment grade (junk bond) U.S. corporate and government fixed income securities, including asset-backed securities, mortgage dollar rolls, mortgage-backed securities (including "to-be-announced" transactions) and securities issued or guaranteed by the U.S. Government and its agencies and

instrumentalities. The Fund may invest in securities denominated in either U.S. dollars or foreign currency. Due to its investment strategy, the Fund may buy and sell securities and other instruments frequently.

The Fund uses a multi-manager approach, relying upon 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). Sub-Advisers are selected for their expertise in managing various kinds of fixed income securities, and each Sub-Adviser makes investment decisions based on an analysis of yield trends, credit ratings and other factors in accordance with its particular discipline.

The Fund may also invest in futures contracts, forward contracts, options and swaps for speculative or hedging purposes. Futures contracts, forward contracts, options and swaps may be 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 may also be 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 may further be 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 a security or basket of securities.

The Sub-Advisers may also engage in currency transactions using futures and foreign currency forward contracts either to seek to hedge the Fund's currency exposure or to enhance the Fund's returns. The Fund may take long and short positions in foreign currencies in excess of the value of the Fund's assets denominated in a particular currency or when the Fund does not own assets denominated in that currency. The Fund will invest primarily in investment grade securities (those rated AAA, AA, A and BBB-). However, the Fund may also invest in non-rated securities or securities rated below investment grade (BB+, B and CCC).

The Fund may also invest a portion of its assets in foreign securities and 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 or assignments of all or a portion of the loans from third parties.

While each Sub-Adviser chooses securities of different types and maturities, the Fund, in the aggregate, generally will have a dollar-weighted average duration that is consistent with that of the broad U.S. fixed income market, as represented by the Bloomberg U.S. Aggregate Bond Index. Duration is a measure of the expected life of a fixed income security that is used to determine the sensitivity of a security's price to changes in interest rates. For example, if a fixed income security has a five-year duration, it will decrease in value by approximately 5% if interest rates rise 1% and increase in value by approximately 5% if interest rates fall 1%. Fixed income instruments with higher duration typically have higher risk and higher volatility.

The dollar-weighted average duration of the Bloomberg U.S. Aggregate Bond Index varies significantly over time, but as of December 31, 2025 it was 5.98 years.

HIGH YIELD BOND FUND - Class I Prospectus | SIMT HIGH YIELD BOND FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the High Yield Bond Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in high yield fixed income securities. The Fund will invest primarily in fixed income securities rated below investment grade (junk bonds), including corporate bonds and debentures, convertible and preferred securities, zero coupon obligations and tranches of collateralized debt obligations (CDOs) and collateralized loan obligations (CLOs).

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC. In managing the Fund's assets, the Sub-Advisers and, to the extent applicable, SIMC, seek to select securities that offer a high current yield as well as total return potential. The Fund seeks to have a portfolio of securities that is diversified as to issuers and industries. The Fund's average weighted maturity may vary, but will generally not exceed ten years. There is no limit on the maturity or credit quality of any individual security in which the Fund may invest.

As noted above, the Fund will invest primarily in securities rated BB, B, CCC, CC, C and D. However, it may also invest in non-rated securities or securities rated investment grade (AAA, AA, A and BBB). The Fund may also invest in exchange-traded funds (ETFs) to gain exposure to a particular portion of the market while awaiting an opportunity to purchase securities directly. The Fund may also invest 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 or assignments of all or a portion of the loans from third parties.

The Fund may also invest in futures contracts, options and swaps for speculative or hedging purposes. Futures, options 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.

REAL RETURN FUND - Class I Prospectus | SIMT Real Return Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Real Return Fund seeks to produce a return similar to that of the Bloomberg 1-5 Year U.S. Treasury Inflation-Protected Securities (TIPS) Index, which is the Fund's benchmark index.

Under normal circumstances, the Fund will invest a significant portion of its assets in investment grade fixed income securities, including inflation-indexed bonds of varying maturities issued by the U.S. Treasury, other U.S. Government agencies and instrumentalities. An inflation-indexed bond is a bond that is structured so

that its principal value will change with inflation. TIPS are a type of inflation-indexed bond in which the Fund may invest. The Fund's exposure to fixed income securities is not restricted by maturity requirements.

The Fund may also invest in 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 time deposits, U.S. and foreign corporate debt including commercial paper; and securitized issues, such as mortgage-backed securities issued by U.S. Government agencies. Although the Real Return Fund is able to use a multi-manager approach under the general supervision of SEI Investments Management Corporation (SIMC or the Adviser) whereby Fund assets would be allocated among multiple sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers), the Fund's assets currently are managed directly by SIMC.

LARGE CAP FUND - Class Y Prospectus | SIMT Large Cap Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Large Cap Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of large companies. For purposes of this Fund, a large company is a company with a market capitalization in the range of companies in the Russell 1000 Index (between $1.0 billion and $4.5 trillion as of December 31, 2025) at the time of purchase. The market capitalization range and the composition of the Russell 1000 Index are subject to change. The Fund will invest

primarily in common stocks, preferred stocks, warrants, American Depositary Receipts (ADRs), real estate investment trusts (REITs) and exchange-traded funds (ETFs). The Fund may also, to a lesser extent, invest in common and preferred stocks of small and medium capitalization companies. The Fund may invest up to 20% of its assets in foreign securities.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies and strategies to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

LARGE CAP VALUE FUND - Class Y Prospectus | SIMT LARGE CAP VALUE FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Large Cap Value Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of large companies. The Fund will primarily seek to purchase securities believed to be attractively valued in relation to various measures, which may include earnings, capital structure or return on invested capital. For purposes of this Fund, a large company is a company with a market capitalization in the range of companies in the Russell 1000 Value Index

(between $1.0 billion and $3.8 trillion as of December 31, 2025) at the time of purchase. The market capitalization range and the composition of the Russell 1000 Value Index are subject to change. The Fund will invest primarily in common stocks, preferred stocks, warrants, American Depositary Receipts (ADRs), real estate investment trusts (REITs) and exchange-traded funds (ETFs). The Fund may also, to a lesser extent, invest in common and preferred stocks of small and medium capitalization companies. The Fund may invest up to 20% of its assets in foreign securities.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies and strategies to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

LARGE CAP GROWTH FUND - Class Y Prospectus | SIMT LARGE CAP GROWTH FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Large 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 large companies. The Fund will primarily seek to purchase securities believed to have attractive growth and appreciation potential. For purposes of this Fund, a large company is a company with a market capitalization in the range of companies in the Russell 1000 Growth Index (between $1.0 billion and $4.5 trillion as of December 31, 2025) at the time of

purchase. The market capitalization range and the composition of the Russell 1000 Growth Index are subject to change. The Fund will invest primarily in common stocks, preferred stocks, warrants, American Depositary Receipts (ADRs), real estate investment trusts (REITs) and exchange-traded funds (ETFs), as well as forward contracts and swaps for hedging and speculative purposes. The Fund may also, to a lesser extent, invest in common and preferred stocks of small and medium capitalization companies. The Fund may invest up to 20% of its assets in foreign securities.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies and strategies to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Sub-Adviser(s) may implement a long/short equity investment strategy by investing in securities, including through forwards and swaps on individual securities or baskets of securities, believed to offer capital appreciation opportunities while also attempting to take advantage of an anticipated decline in the price of a company. A long/short equity investment strategy takes (i) long positions with respect to investments that are believed to be undervalued relative to their potential and likely to increase in price, and (ii) short positions with respect to investments that are believed to have significant risk of decreasing in price. The Sub-Adviser(s) seek returns from strong security selection on both the long and short sides. These long and short positions may be completely unrelated.

The Fund implements the investment recommendations of SIMC and certain of the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each such Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the applicable Sub-Advisers and SIMC, with the weighting of each such Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

TAX-MANAGED LARGE CAP FUND - Class Y Prospectus | SIMT TAX-MANAGED LARGE CAP FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Tax-Managed Large Cap Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of large companies. For purposes of this Fund, a large company is a company with a market capitalization in the range of companies in the Russell 1000 Index (between $1.0 billion and $4.5 trillion as of December 31, 2025) at the time of purchase. The market capitalization range and the composition of the Russell 1000 Index are subject to change. The

Fund will invest primarily in common stocks, preferred stocks, warrants, American Depositary Receipts (ADRs), real estate investment trusts (REITs) and exchange-traded funds (ETFs). The Fund may also, to a lesser extent, invest in common and preferred stocks of small and medium capitalization companies. The Fund may invest up to 20% of its assets in foreign securities.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies and strategies to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models, primarily for the purpose of efficient tax management of the Fund's securities transactions. The overlay manager seeks to manage the impact of taxes by, among other things, selling stocks with the highest tax cost first, opportunistically harvesting losses and deferring recognition of taxable gains, where possible. SIMC may also direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

SMALL CAP FUND - Class Y Prospectus | SIMT Small Cap Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Small Cap Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities (both common and preferred stocks) of small companies, including exchange-traded funds (ETFs) based on small capitalization indexes and securities of real estate investment trusts (REITs). For purposes of this Fund, a small company is a company with a market capitalization in the range of companies in the Russell 2000 Index (between $1.3 million and $31.3 billion as

of December 31, 2025), as determined at the time of purchase. The market capitalization range and the composition of the Russell 2000 Index are subject to change. The Fund may also invest in warrants and, to a lesser extent, in securities of large capitalization companies. Due to its investment strategy, the Fund may buy and sell securities and other instruments frequently.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and certain of its Sub-Advisers through the use of an overlay manager appointed by SIMC. Each applicable Sub-Adviser and SIMC provide a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for its portion of the Fund that represents the aggregation of the model portfolios of the applicable Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

SMALL CAP VALUE FUND - Class Y Prospectus | SIMT SMALL CAP VALUE FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Small Cap Value 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. The Fund will primarily seek to purchase securities believed to be attractively valued in relation to various measures, which may include earnings, capital structure or return on invested capital. For purposes of this Fund, a small company is a company with a market capitalization in the range of companies in the Russell 2000 Index

(between $1.3 million and $31.3 billion as of December 31, 2025), as determined at the time of purchase. The market capitalization range and the composition of the Russell 2000 Index are subject to change. The Fund's investments in equity securities may include common and preferred stocks, warrants, and, to a lesser extent, real estate investment trusts (REITs), exchange-traded funds (ETFs) and securities of large capitalization companies.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

SMALL CAP GROWTH FUND - Class Y Prospectus | SIMT SMALL CAP GROWTH FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

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. The Fund will primarily seek to purchase securities believed to have attractive growth and appreciation potential. For purposes of this Fund, a small company is a company with a market capitalization in the range of companies in the Russell 2000 Index (between $1.3 million and $31.3 billion as of December 31, 2025), as determined at

the time of purchase. The market capitalization range and the composition of the Russell 2000 Index are subject to change. The Fund's investments in equity securities may include common and preferred stocks, warrants and, to a lesser extent, real estate investment trusts (REITs), exchange-traded funds (ETFs) and securities of large capitalization companies. Due to its investment strategy, the Fund may buy and sell securities and other instruments frequently.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) to manage Fund assets under the general supervision of SIMC. In managing its portion of the Fund's assets, SIMC or each Sub-Adviser may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

TAX-MANAGED SMALL/MID CAP FUND - Class Y Prospectus | SIMT TAX-MANAGED SMALL/MID CAP FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Tax-Managed Small/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 small and medium capitalization companies. For purposes of this Fund, a small or medium capitalization company is a company with a market capitalization in the range of companies in the Russell 2500 Index (between approximately $1.3 million and $37.0 billion as of December 31, 2025) at the time of purchase. The market capitalization

range and the composition of the Russell 2500 Index are subject to change. The Fund's investments in equity securities may include common and preferred stocks, warrants and, to a lesser extent, real estate investment trusts (REITs), exchange-traded funds (ETFs) and securities of large capitalization companies.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies and strategies to manage Fund assets under the general supervision of SIMC. In managing assets of the Fund not allocated to Sub-Advisers, SIMC may apply a variety of quantitative and/or fundamental investment styles. A quantitative investment style generally involves a systematic or rules-based approach to selecting investments based on specific measurable factors. A fundamental investment style generally involves selecting investments through research and analysis of financial statements, relevant industry and economic data, or other characteristics.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models, primarily for the purpose of efficient tax management of the Fund's securities transactions. The overlay manager seeks to manage the impact of taxes by, among other things, selling stocks with the highest tax cost first, opportunistically harvesting losses and deferring recognition of taxable gains, where possible. SIMC may also direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading cost efficiencies, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

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

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

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.

U.S. MANAGED VOLATILITY FUND - Class Y Prospectus | SIMT US MANAGED VOLATILITY FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the U.S. Managed Volatility Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in securities of U.S. companies of all capitalization ranges. These securities may include common stocks, preferred stocks, exchange-traded funds (ETFs) and warrants. The Fund may also, to a lesser extent, invest in American Depositary Receipts (ADRs), real estate investment trusts (REITs) and securities of non-U.S. companies.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC. The Fund seeks to achieve an absolute return of the broad U.S. equity markets, but with a lower absolute volatility. Over the long term, the Fund seeks to achieve a return similar to that of the Russell 3000 Index, but with a lower level of volatility. However, given that the Fund's investment strategy focuses on absolute return and risk, the Fund's sector and market capitalization exposures will typically vary from the index and may cause significant performance deviations relative to the index over shorter-term periods. The Fund seeks to achieve lower volatility by constructing a portfolio of securities that effectively weighs securities based on their total expected risk and return without regard to market capitalization and industry.

GLOBAL MANAGED VOLATILITY FUND - Class Y Prospectus | SIMT GLOBAL MANAGED VOLATILITY FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Global Managed Volatility Fund will typically invest in securities of U.S. and foreign companies of all capitalization ranges. These securities may include common stocks, preferred stocks, warrants, depositary receipts, exchange-traded funds (ETFs) and real estate investment trusts (REITs). The Fund also may use futures contracts and forward contracts.

Under normal circumstances, the Fund will invest in at least three countries outside of the U.S., but will typically invest much more broadly. It is expected that at least 40% of the Fund's assets will be invested in non-U.S. securities. The Fund will invest primarily in companies located in developed countries, but may also invest in companies located in emerging markets.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC. This approach is intended to manage the risk characteristics of the Fund. The Fund seeks to achieve an absolute return of the broad global equity markets, but with a lower absolute volatility. Over the long term, the Fund seeks to achieve a return similar to that of the MSCI World Index, but with a lower level of volatility. However, given that the Fund's investment strategy focuses on absolute return and risk, the Fund's country, sector and market capitalization exposures will typically vary from the index and may cause significant performance deviations relative to the index over shorter-term periods. The Fund seeks to achieve lower volatility by constructing a portfolio of securities that the Sub-Advisers believe will produce a less volatile return than the market over time. SIMC and each Sub-Adviser effectively weighs securities based on their total expected risk and return without regard to market capitalization and industry.

In managing the Fund's currency exposure from foreign securities, the Fund may buy and sell futures or forward contracts on currencies for hedging purposes.

TAX-MANAGED MANAGED VOLATILITY FUND - Class Y Prospectus | SIMT Tax-Managed Managed Volatility Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Tax-Managed Managed Volatility Fund will typically invest in securities of U.S. companies of all capitalization ranges. These securities may include common stocks, preferred stocks, warrants and exchange-traded funds (ETFs). The Fund may also, to a lesser extent, invest in American Depositary Receipts (ADRs), real estate investment trusts (REITs) and securities of non-U.S. companies. Although the Fund will be

measured against the Russell 3000 Index, the Fund is expected to have significant sector and market capitalization deviations from the index given its focus on absolute risk as opposed to index relative risk. This could lead to significant performance deviations relative to the index over shorter-term periods.

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment approaches to manage Fund assets under the general supervision of SIMC. The Fund seeks to achieve an absolute return of the broad U.S. equity markets in a tax-efficient fashion, but with a lower absolute volatility. Over the long term, the Fund seeks to achieve a return similar to that of the Russell 3000 Index, but with a lower level of volatility. However, given that the Fund's investment strategy focuses on absolute return and risk, the Fund's sector and market capitalization exposures will typically vary from the index and may cause significant performance deviations relative to the index over shorter-term periods. The Fund seeks to achieve lower volatility by constructing a portfolio of securities that effectively weighs securities based on their total expected risk and return without regard to market capitalization and industry. This will tend to lead SIMC and the Fund's Sub-Advisers to construct portfolios with a low beta relative to the overall U.S. equity market.

The Fund implements the investment recommendations of SIMC and the Sub-Advisers through the use of an overlay manager appointed by SIMC. Each such Sub-Adviser and SIMC provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's or SIMC's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers and SIMC, with the weighting of each such Sub-Adviser's model in the total portfolio determined by SIMC.

Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models. For example, SIMC may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes. The overlay manager may also vary the portfolio implementation to seek trading efficiencies, loss harvesting, portfolio rebalancing or other portfolio construction objectives as directed by SIMC.

TAX-MANAGED INTERNATIONAL MANAGED VOLATILITY FUND - Class Y Prospectus | SIMT Tax-Managed International Managed Volatility Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Tax-Managed International Managed Volatility Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in non-U.S. equity securities. These securities may include common stocks and real estate investment trusts (REITs) of all capitalization ranges. Under normal circumstances, the Fund will invest in securities of issuers that are located in at least

three countries outside of the U.S., but will typically invest much more broadly. The Fund will invest primarily in companies located in developed countries.

The Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach to investing, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC. This approach is intended to manage the risk characteristics of the Fund.

The Fund seeks to achieve an absolute return similar to that of the broad international developed equity markets (International Market) in a tax-sensitive manner, but with lower absolute volatility. Over the long-term, the Fund seeks to achieve a return similar to that of the MSCI EAFE Index (Index), but with a lower level of volatility. Over shorter periods of time, however, due to its focus on absolute risk, the portfolio's country, sector and market capitalization exposures will typically vary from the International Market and it may experience significant performance deviations from the International Market. The Fund seeks to achieve lower volatility by constructing a portfolio of securities that primarily exhibit a more stable historical or predicted price and earnings behavior (i.e. absolute risk), but also take into consideration low correlation attributes and expected returns. Generally, the Fund is likely to underperform in a steeply rising International Market, but seeks to mitigate losses in a falling International Market.

The Fund implements the investment recommendations of Sub-Advisers through the use of an overlay manager appointed by SIMC. Each Sub-Adviser provides a model portfolio to the overlay manager on an ongoing basis that represents that Sub-Adviser's recommendation as to the securities to be purchased, sold or retained by the Fund. The overlay manager then constructs a portfolio for the Fund that represents the aggregation of the model portfolios of the Sub-Advisers, with the weighting of each Sub-Adviser's model in the total portfolio determined by SIMC. Pursuant to direction from SIMC, the overlay manager has limited authority to vary from the models, primarily for the purpose of tax management of the portfolio's securities transactions. SIMC also may direct the overlay manager to adjust the portfolio to implement SIMC's forward looking views regarding various portfolio characteristics or factors, or for risk management purposes.

The overlay manager and SIMC each seek to manage the impact of taxes by using certain techniques, which may include selling stocks with the highest tax cost basis first to realize capital losses or defer capital gains, preventing wash sales, avoiding high portfolio turnover, controlling the holding period of a security to convert short-term capital gains to long-term capital gains, and, where appropriate, opportunistically harvesting losses to offset other capital gains.

The Fund considers the security of an issuer to be "non-U.S." if the issuer is domiciled, incorporated, located and/or principally traded in a country other than the U.S. Developed market countries are those countries that are included in a developed markets index by a recognized index provider, or have similar developed characteristics, in each case determined at the time of purchase.

The Fund may purchase shares of exchange-traded funds (ETFs) to gain exposure to a particular portion of the market while awaiting an opportunity to purchase securities or other instruments directly.

REAL ESTATE FUND - Class Y Prospectus | SIMT REAL ESTATE FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Real Estate Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of real estate companies (e.g., common stocks, rights, warrants, exchange-traded funds (ETFs), convertible securities and preferred stocks of real estate investment trusts (REITs) and real estate operating companies (REOCs)). Generally, the Fund will invest in real estate companies operating in the United States.

The Fund uses a multi-manager approach, relying upon a number of sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) to manage Fund assets under the general supervision of SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser).

CORE FIXED INCOME FUND - Class Y Prospectus | SIMT CORE FIXED INCOME FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Core Fixed Income Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in fixed income securities. The Fund will invest primarily in investment and non-investment grade (junk bond) U.S. corporate and government fixed income securities, including asset-backed securities, mortgage dollar rolls, mortgage-backed securities (including "to-be-announced" transactions) and securities issued or guaranteed by the U.S. Government and its agencies and

instrumentalities. The Fund may invest in securities denominated in either U.S. dollars or foreign currency. Due to its investment strategy, the Fund may buy and sell securities and other instruments frequently.

The Fund uses a multi-manager approach, relying upon 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). Sub-Advisers are selected for their expertise in managing various kinds of fixed income securities, and each Sub-Adviser makes investment decisions based on an analysis of yield trends, credit ratings and other factors in accordance with its particular discipline.

The Fund may also invest in futures contracts, forward contracts, options and swaps for speculative or hedging purposes. Futures contracts, forward contracts, options and swaps may be 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 may also be 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 may further be 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 a security or basket of securities.

The Sub-Advisers may also engage in currency transactions using futures and foreign currency forward contracts either to seek to hedge the Fund's currency exposure or to enhance the Fund's returns. The Fund may take long and short positions in foreign currencies in excess of the value of the Fund's assets denominated in a particular currency or when the Fund does not own assets denominated in that currency. The Fund will invest primarily in investment grade securities (those rated AAA, AA, A and BBB-). However, the Fund may also invest in non-rated securities or securities rated below investment grade (BB+, B and CCC).

The Fund may also invest a portion of its assets in foreign securities and 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 or assignments of all or a portion of the loans from third parties.

While each Sub-Adviser chooses securities of different types and maturities, the Fund, in the aggregate, generally will have a dollar-weighted average duration that is consistent with that of the broad U.S. fixed income market, as represented by the Bloomberg U.S. Aggregate Bond Index. Duration is a measure of the expected life of a fixed income security that is used to determine the sensitivity of a security's price to changes in interest rates. For example, if a fixed income security has a five-year duration, it will decrease in value by approximately 5% if interest rates rise 1% and increase in value by approximately 5% if interest rates fall 1%. Fixed income instruments with higher duration typically have higher risk and higher volatility.

The dollar-weighted average duration of the Bloomberg U.S. Aggregate Bond Index varies significantly over time, but as of December 31, 2025 it was 5.98 years.

HIGH YIELD BOND FUND - Class Y Prospectus | SIMT HIGH YIELD BOND FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the High Yield Bond Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in high yield fixed income securities. The Fund will invest primarily in fixed income securities rated below investment grade (junk bonds), including corporate bonds and debentures, convertible and preferred securities, zero coupon obligations and tranches of collateralized debt obligations (CDOs) and collateralized loan obligations (CLOs).

SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC. In managing the Fund's assets, the Sub-Advisers and, to the extent applicable, SIMC, seek to select securities that offer a high current yield as well as total return potential. The Fund seeks to have a portfolio of securities that is diversified as to issuers and industries. The Fund's average weighted maturity may vary, but will generally not exceed ten years. There is no limit on the maturity or credit quality of any individual security in which the Fund may invest.

As noted above, the Fund will invest primarily in securities rated BB, B, CCC, CC, C and D. However, it may also invest in non-rated securities or securities rated investment grade (AAA, AA, A and BBB). The Fund may also invest in exchange-traded funds (ETFs) to gain exposure to a particular portion of the market while awaiting an opportunity to purchase securities directly. The Fund may also invest 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 or assignments of all or a portion of the loans from third parties.

The Fund may also invest in futures contracts, options and swaps for speculative or hedging purposes. Futures, options 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.

CONSERVATIVE INCOME FUND - Class Y Prospectus | SIMT Conservative Income Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Conservative Income Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in U.S. dollar-denominated debt securities that the Fund's sub-adviser (the Sub-Adviser) believes present minimal credit risks to the Fund.

Under normal market conditions, the Fund will primarily invest in short-term US dollar denominated debt securities, including: (i) commercial paper, corporate bonds and asset-based securities of U.S. and foreign

issuers; (ii) certificates of deposit, time deposits, bankers' acceptances, bank notes, and other obligations of U.S. savings and loan and thrift institutions, US banks or US branches or non-US branches of foreign banks; (iii) short-term obligations issued by state and local governments; (iv) U.S. Treasury obligations and obligations issued or guaranteed as to principal and interest by agencies or instrumentalities of the U.S. Government; and (v) obligations of foreign governments (including Canadian and Provincial Government and Crown Agency obligations). The Fund may also enter into fully-collateralized repurchase agreements. Although the Fund may invest in securities with any maturity or duration, the Fund generally seeks to maintain a weighted average maturity of 90 days or less.

Under normal circumstances, the Fund will invest at least 25% of its assets in securities issued by companies in the financial services industry, but may invest less than 25% of its assets in this industry as a temporary defensive measure.

The Fund uses a Sub-Adviser to manage Fund assets under the general supervision of SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser). Through analysis of both macroeconomic factors and individual company attributes, the Sub-Adviser seeks to invest in securities that are marketable and liquid, offer competitive yields, and are of issuers that represent low credit risk. In selecting securities, the Sub-Adviser also considers factors such as the anticipated level of interest rates and the maturity of individual securities relative to the maturity of the Fund as a whole.

The Fund is not a money market fund and does not seek to maintain a stable net asset value.

TAX-FREE CONSERVATIVE INCOME FUND - Class Y Prospectus | SIMT Tax-Free Conservative Income Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Tax-Free Conservative Income Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in US dollar-denominated municipal securities that the Fund's sub-adviser (the Sub-Adviser) believes present minimal credit risks to the Fund and that pay interest that (i) is exempt from federal income taxes and (ii) is not taxable under the federal alternative

minimum tax applicable to individuals. The principal issuers of these securities are state and local governments and their agencies located in any of the fifty states, the District of Columbia, Puerto Rico and other U.S. territories and possessions.

Under normal market conditions, the Fund will primarily invest in short-term US dollar-denominated debt securities including: US municipal bonds, notes, variable rate demand notes, tender option bonds, floating rate notes, industrial development bonds, pre-refunded bonds and commercial paper. The Fund may also, to a limited extent, invest in repurchase agreements and securities subject to the alternative minimum tax or in debt securities subject to federal income tax. Although the Fund may invest in securities with any maturity or duration, the Fund generally seeks to maintain a weighted average maturity of 90 days or less.

The Fund uses a Sub-Adviser to manage Fund assets under the general supervision of SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser). Through analysis of both macroeconomic factors and individual company attributes, the Sub-Adviser seeks to invest in securities that are marketable and liquid, offer competitive yields, and are of issuers that represent low credit risk. In selecting securities, the Sub-Adviser considers factors such as the anticipated level of interest rates and the maturity of individual securities relative to the maturity of the Fund as a whole.

The Fund is not a money market fund and does not seek to maintain a stable net asset value.

REAL RETURN FUND - Class Y Prospectus | SIMT Real Return Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Real Return Fund seeks to produce a return similar to that of the Bloomberg 1-5 Year U.S. Treasury Inflation-Protected Securities (TIPS) Index, which is the Fund's benchmark index.

Under normal circumstances, the Fund will invest a significant portion of its assets in investment grade fixed income securities, including inflation-indexed bonds of varying maturities issued by the U.S. Treasury, other U.S. Government agencies and instrumentalities. An inflation-indexed bond is a bond that is structured so

that its principal value will change with inflation. TIPS are a type of inflation-indexed bond in which the Fund may invest. The Fund's exposure to fixed income securities is not restricted by maturity requirements.

The Fund may also invest in 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 time deposits, U.S. and foreign corporate debt including commercial paper; and securitized issues, such as mortgage-backed securities issued by U.S. Government agencies. Although the Real Return Fund is able to use a multi-manager approach under the general supervision of SEI Investments Management Corporation (SIMC or the Adviser) whereby Fund assets would be allocated among multiple sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers), the Fund's assets currently are managed directly by SIMC.

DYNAMIC ASSET ALLOCATION FUND - Class Y Prospectus | SIMT Dynamic Asset Allocation Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Fund employs a dynamic investment strategy seeking to achieve, over time, a total return in excess of the broad U.S. equity market by selecting investments from among a broad range of asset classes or market exposures based upon SEI Investments Management Corporation's (SIMC or the Adviser) expectations of risk and return. Asset classes or market exposures in which the Fund may invest include U.S. and foreign equities and bonds, currencies, and investment exposures to various market characteristics such as interest rates or volatility. SIMC directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach, relying on one or more sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers) with differing investment philosophies to manage Fund assets under the general supervision of SIMC, as discussed below.

The asset classes and market exposures used, and the Fund's allocations among them, are determined based on SIMC's views of fundamental, technical or valuation measures and may be dynamically adjusted (i.e. actively adjusted over long or short periods of time). The Fund may at any particular point in time be diversified across many exposures or concentrated in a limited number of exposures, including, possibly, a single asset class or market exposure.

Although the Fund will seek to achieve excess total return through its dynamic investment selection, it will also normally maintain, as a primary component of its strategy, passive exposure to the large capitalization U.S. equity market. To the extent that the Fund is not dynamically invested in other asset classes or market exposures, the Fund's assets will generally be passively invested in a portfolio of securities designed to track, before fees and expenses, the performance of the large capitalization U.S. equity market. This passive exposure to the large capitalization U.S. equity market is implemented by the Sub-Adviser.

The Fund may obtain asset class or market exposures by investing directly (e.g., in equity and fixed income securities and other instruments) or indirectly (e.g., through the use of other pooled investment vehicles, a wholly-owned subsidiary or derivative instruments, principally futures contracts, forward contracts, options and swaps). The particular types of securities and other instruments in which the Fund may invest are further described below.

Equity Securities — The Fund may invest in equity securities, including common stocks, preferred stocks, convertible securities, warrants (including equity-linked warrants) and depositary receipts of U.S. and non-U.S. issuers (including emerging markets) of various market capitalizations and industries.

Fixed Income Securities — The Fund may invest in fixed income securities that are investment or non-investment grade (also known as "junk bonds"), U.S.- or foreign-issued (including emerging markets), and corporate- or government-issued. The Fund's fixed income investments may include mortgage-backed securities, corporate bonds and debentures, commercial paper, money market instruments, mortgage dollar rolls, repurchase and reverse repurchase agreements, zero coupon bonds, structured notes, obligations of foreign governments, and obligations of either supranational entities issued or guaranteed by certain banks and entities organized to restructure the outstanding debt of such issuers.

The Fund's fixed income investments may also include U.S. Treasury obligations, obligations issued by agencies or instrumentalities of the U.S. Government and Treasury Inflation Protected Securities (TIPS) and other inflation-linked debt securities of both U.S. and non-U.S. governments and corporations.

The Fund may invest in fixed, variable and floating rate fixed income instruments. The Fund's portfolio and the Fund's investments in particular fixed income securities are not subject to any maturity or duration restrictions.

Other Instruments — The Fund may also invest in real estate investment trusts (REITs) and securities issued by U.S. and non-U.S. real estate companies.

Pooled Investment Vehicles — In addition to direct investment in securities and other instruments, the Fund may invest in affiliated and unaffiliated funds, including open-end funds, money market funds, closed-end funds and exchange-traded funds (ETFs), to obtain the Fund's desired exposure to a particular asset class.

Derivative and Commodity Instruments — The Fund may also purchase or sell futures contracts, forward contracts, options and swaps (including swaptions, caps, floors or collars) for return enhancement or hedging purposes or to obtain the Fund's desired exposure to a particular asset class or market exposure. Futures contracts, forward contracts and swaps may be 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 may also be used to mitigate the Fund's overall level of risk and/or the Fund's exposure to the risk of particular types of securities or market segments. The Fund may purchase or sell futures contracts (and options on futures contracts) on U.S. Government securities for return enhancement and hedging purposes. The Fund may purchase and sell forward contracts on currencies or securities for return enhancement and hedging purposes. Interest rate swaps are further used to manage the Fund's yield spread sensitivity.

Swaps may be used for return enhancement or hedging purposes. Securities index and single security swaps may be used to manage the inflation-adjusted return of the Fund or to more efficiently gain exposure to a particular security or basket of securities. 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 a security or basket of securities. The Fund may also, to a lesser extent, purchase or sell put or call options on securities, indexes or currencies for return enhancement or hedging purposes or to obtain the Fund's desired exposure to a particular asset class or market exposure.

The Fund may seek to gain exposure to the commodity markets, in whole or in part, through investments in a wholly owned subsidiary of the Fund organized under the laws of the Cayman Islands (Subsidiary). The Subsidiary, unlike the Fund, may invest to a significant extent in commodities, commodity contracts, commodity investments and commodity-linked derivative instruments. The Subsidiary may also invest in other instruments in which the Fund is permitted to invest, either as investments or to serve as margin or collateral for its derivative positions. The Fund may invest up to 25% of its total assets in the Subsidiary. The Subsidiary is advised by SIMC.

Currency Exposure — The Fund may invest in U.S. dollar and non-U.S. dollar denominated securities. The Fund may also seek to enhance its return by actively managing the Fund's foreign currency exposure. In managing the Fund's currency exposure, the Fund may buy and sell currencies (i.e., take long or short positions) using futures, options and foreign currency forward contracts. The Fund may take long and short positions in foreign currencies in excess of the value of the Fund's assets denominated in a particular currency or when the Fund does not own assets denominated in that currency. The Fund may also engage in currency transactions in an attempt to take advantage of certain inefficiencies in the currency exchange market, to increase its exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one currency to another. In managing its currency exposure from foreign securities, the Fund may buy and sell currencies for hedging or for speculative purposes.

Short Sales — The Fund may engage in short sales on equity securities that are expected to underperform the market or their peers. When the Sub-Adviser sells securities short, it may invest the proceeds from the short sales in an attempt to enhance returns. This strategy may effectively result in the Fund having a leveraged investment portfolio, which results in greater potential for loss.

MULTI-STRATEGY ALTERNATIVE FUND - Class Y Prospectus | SIMT Multi-Strategy Alternative Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

The Multi-Strategy Alternative Fund employs a strategy intended to generate an absolute (i.e., positive) return in various market cycles with reduced correlation to the stock and bond markets. The Fund allocates its assets among a variety of investment strategies through the use of: (i) affiliated and unaffiliated funds, including open-end funds, closed-end funds and exchange traded funds (Underlying Funds); and/or (ii) one or more investment sub-advisers (each, a Sub-Adviser and collectively, the Sub-Advisers). In addition, SEI Investments Management Corporation, the Fund's adviser (SIMC or the Adviser), directly manages a portion of the Fund's assets, which may include allocating assets to investments in Underlying Funds selected by SIMC. The Underlying Funds or Sub-Advisers that are employed may apply any of a variety of investment strategies, which may include: (i) directional or tactical strategies, such as long/short equity, long/short credit and global tactical asset allocation; (ii) event driven strategies, such as distressed securities, special situations and merger arbitrage; and (iii) arbitrage strategies, such as fixed income or interest rate arbitrage, convertible arbitrage, pairs trading and equity market neutral.

The Fund will allocate its assets among Underlying Funds and/or Sub-Advisers based on SIMC's analysis of their investment strategies and historical performance as well as SIMC's analysis of the potential for each to perform independently of one another. By allocating its assets in this manner, the Fund will seek to reduce risk, lower volatility and achieve positive returns in various market cycles. Allocation of assets to any one Underlying Fund, Sub-Adviser or strategy will vary based on market conditions. By investing in an Underlying Fund, the Fund becomes a shareholder of that Underlying Fund. Underlying Funds and Sub-Advisers may invest in a broad range of asset classes, securities and other investments to achieve their designated investment strategies, which may include U.S., foreign and emerging markets securities, equity securities of all types and capitalization ranges, investment and non-investment grade fixed income securities (junk bonds) of any duration or maturity issued by corporations or governments, bank loans in the form of participations in the loans or assignments of all or a portion of the loans from third parties, commodities, currencies, warrants, depositary receipts, exchange traded notes and derivative instruments, principally, equity options, futures contracts, options on futures contracts, forward contracts, swap agreements and credit default swaps. In addition, the Fund may invest in cash, money market instruments and other short-term obligations to achieve its investment goal. Due to its investment strategy, the Fund may buy and sell securities and other instruments frequently.

The Fund currently allocates assets to Sub-Advisers pursuant to SIMC's "manager of managers" model, and the Sub-Advisers manage Fund assets under the general supervision of SIMC.

The Fund is intended to be only one component of an investor's broader investment program and is not designed to be a complete investment program. Investors who seek to add an alternative component to their overall investment program may wish to allocate a portion of their investment to the Fund.

MULTI-ASSET ACCUMULATION FUND - Class F Prospectus | SIMT MULTI-ASSET ACCUMULATION FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Fund will seek to generate total return over time by selecting investments from among a broad range of asset classes based upon SEI Investments Management Corporation's (SIMC) or the sub-adviser's (each, a Sub-Adviser and collectively, the Sub-Advisers) expectations of risk and return. The asset classes used and the Fund's allocations among asset classes will be determined based on SIMC's or the Sub-Adviser's views of fundamental, technical or valuation measures. The Fund's allocations among asset classes may be adjusted over short periods of time. At any point in time, the Fund may be diversified across many asset classes or concentrated in a limited number of asset classes. The Fund may obtain its exposures to the asset classes by investing directly in securities and other investments or indirectly through the use of other pooled investment vehicles and derivative instruments.

SIMC directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach under the general supervision of SIMC, allocating Fund assets among one or more Sub-Advisers using different investment strategies.

The Fund may allocate all or a portion of its assets using a "risk parity" approach that seeks to balance risk across all capital market exposures, which may result in asset classes with lower perceived risk having a greater notional allocation within the Fund's portfolio than asset classes with higher perceived risk. Notional allocation refers to the Fund's use of one or more derivative contracts to attempt to obtain exposure to a potential gain or loss on the market value of the instruments underlying the Fund's derivative contracts (e.g., a security, currency or commodity (or a basket or index)). The market value of such underlying instruments generally exceeds the amount of cash or assets required to establish or maintain the derivative contracts. In addition, the Fund may further adjust asset allocations and capital market exposures based on realized and expected measures of volatility with the goal of managing the Fund's volatility. This may result in the Fund increasing capital market exposures during periods of perceived falling risk and decreasing capital market exposures during periods of perceived rising risk.

The Fund may invest in equity securities, including common stocks, preferred stocks, convertible securities, warrants and depositary receipts of U.S. and non-U.S. issuers (including emerging markets) of various market capitalizations and industries.

The Fund may invest in fixed income securities that are investment or non-investment grade (also known as junk bonds), U.S.- or foreign-issued (including emerging markets) and corporate- or government-issued.

The Fund's fixed income investments may include asset-backed securities, mortgage-backed securities, corporate bonds and debentures, commercial paper, exchange traded notes (ETNs), money market instruments, mortgage dollar rolls, repurchase and reverse repurchase agreements, when issued/delayed delivery securities, zero coupon bonds, obligations of foreign governments and obligations of either supranational entities issued or guaranteed by certain banks and entities organized to restructure the outstanding debt of such issuers. The Fund's fixed income investments may also include obligations of U.S. and foreign banks, such as certificates of deposit and time deposits, U.S. Treasury obligations, obligations issued by agencies or instrumentalities of the U.S. Government (including obligations not guaranteed by the U.S. Treasury), such as obligations issued by U.S. Government sponsored entities, and Treasury Inflation Protected Securities (TIPS) and other inflation-linked debt securities of both U.S. and non-U.S. governments and corporations, and municipal bonds and debentures. The Fund may invest in fixed, variable and floating rate fixed income instruments. The Fund's portfolio and the Fund's investments in particular fixed income securities are not subject to any maturity or duration restrictions.

The Fund may also invest a portion of its assets in bank loans, which are, generally, non-investment grade floating rate instruments, in the form of participations in the loans or assignments of all or a portion of the loans from third parties.

In addition to direct investment in securities and other instruments, the Fund may invest in affiliated and unaffiliated funds, subject to the limitations of the Investment Company Act of 1940, as amended (1940 Act). Such investment may include open-end funds, money market funds, closed-end funds and exchange-traded funds (ETFs) (including leveraged and inverse ETFs). The Fund may also invest in real estate investment trusts (REITs) and securities issued by U.S. and non-U.S. real estate companies.

A portion of the Fund's assets may also be invested in commodity investments to provide exposure to the investment returns of the commodities markets. Commodity investments include notes with interest payments that are tied to an underlying commodity or commodity index, ETFs or other exchange-traded products that are tied to the performance of a commodity or commodity index or other types of investment vehicles or instruments that provide returns that are tied to commodities or commodity indexes. The Fund may also invest in equity securities of issuers in commodity-related industries.

The Fund may also seek to gain exposure to the commodity markets, in whole or in part, through investments in a wholly owned subsidiary of the Fund organized under the laws of the Cayman Islands (Subsidiary). The Subsidiary, unlike the Fund, may invest to a significant extent in commodities, commodity contracts and commodity investments (including through derivatives). The Subsidiary may also invest in other instruments in which the Fund is permitted to invest, either as investments or to serve as margin or collateral for its derivative positions. The Fund may invest up to 25% of its total assets in the Subsidiary. The Subsidiary is advised by SIMC.

The Fund, either directly or through its investment in the Subsidiary, may also purchase or sell futures contracts, options, forward contracts and swaps to obtain the Fund's desired exposure to an asset class or for return enhancement or hedging purposes. Futures contracts, forward contracts, options and swaps may be used to synthetically obtain exposure to securities or baskets of securities and to manage the Fund's interest rate duration and yield curve exposure. Due to the Fund's structure and level of turnover, derivative instruments may be an efficient method of obtaining exposure to various types of markets. Interest rate swaps are further used to manage the Fund's yield spread sensitivity. Securities index swaps may be used to obtain exposure to different U.S. and foreign equity markets. Futures and swaps on futures may be used to gain exposure to U.S. and foreign sovereign bond markets, equity markets and commodities markets. 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 a security or basket of securities.

The Fund may invest in U.S. dollar and non-U.S. dollar denominated securities. The Sub-Advisers may also seek to enhance the Fund's return by actively managing the Fund's foreign currency exposure. In managing the Fund's currency exposure, the Sub-Advisers may buy and sell currencies (i.e., take long or short positions) using futures and foreign currency forward contracts. The Fund may take long and short positions in foreign currencies in excess of the value of the Fund's assets denominated in a particular currency or when the Fund does not own assets denominated in that currency. The Fund may also engage in currency transactions in an attempt to take advantage of certain inefficiencies in the currency exchange market, to increase its exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one currency to another. In managing the Fund's currency exposure from foreign securities, the Sub-Advisers may buy and sell currencies for hedging or for speculative purposes.

MULTI-ASSET INCOME FUND - Class F Prospectus | SIMT MULTI-ASSET INCOME FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Fund will seek to generate total return with an emphasis on income by selecting investments from among a broad range of asset classes based upon SEI Investments Management Corporation's (SIMC) or the sub-adviser's (each, a Sub-Adviser and collectively, the Sub-Advisers) expectations for income and, to a lesser extent, capital appreciation. The asset classes used and the Fund's allocations among asset classes will be determined based on SIMC's or the Sub-Adviser's views of

fundamental, technical or valuation measures. The Fund's allocations among asset classes may be adjusted over short periods of time. At any point in time, the Fund may be diversified across many asset classes or concentrated in a limited number of asset classes. The Fund may obtain its exposures to the asset classes by investing directly in securities and other investments or indirectly through the use of other pooled investment vehicles and derivative instruments.

SIMC directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach under the general supervision of SIMC, allocating Fund assets among one or more Sub-Advisers using different investment strategies.

The Fund may invest in equity securities, including common stocks, preferred stocks, convertible securities, warrants and depositary receipts, of U.S. and non-U.S. issuers (including emerging markets) of various market capitalizations and industries.

The Fund may invest in fixed income securities that are investment or non-investment grade (also known as junk bonds), U.S.- or foreign-issued (including emerging markets) and corporate- or government-issued. The Fund may invest in a wide range of fixed income investments, including asset-backed securities, mortgage-backed securities, collateralized debt and collateralized loan obligations (CDOs and CLOs, respectively), corporate and municipal bonds and debentures, structured notes, construction loans, commercial paper, exchange traded notes (ETNs), money market instruments, mortgage dollar rolls, repurchase and reverse repurchase agreements, when issued/delayed delivery securities, zero coupon bonds, obligations of foreign governments and obligations of supranational entities issued or guaranteed by certain banks. The Fund's fixed income investments may also include U.S. Treasury obligations, obligations issued by agencies or instrumentalities of the U.S. Government (including obligations not guaranteed by the U.S. Treasury), such as obligations issued by U.S. Government sponsored entities, and Treasury Inflation Protected Securities (TIPS) and other inflation-linked debt securities. The Fund may invest in fixed, variable and floating rate fixed income instruments. The Fund's portfolio and the Fund's investments in particular fixed income securities are not subject to any maturity or duration restrictions.

The Fund may invest up to 25% of its assets in master limited partnership (MLP) units and may also invest a portion of its assets in bank loans, which are, generally, non-investment grade floating rate instruments, in the form of participations in the loans or assignments of all or a portion of the loans from third parties.

In addition to direct investment in securities and other instruments, the Fund may invest in affiliated and unaffiliated funds, subject to the limitations of the Investment Company Act of 1940, as amended (1940 Act). Such investment may include open-end funds, money market funds, closed-end funds and exchange-traded funds (ETFs) (including leveraged and inverse ETFs). The Fund may also invest in real estate investment trusts (REITs) and securities issued by U.S. and non-U.S. real estate companies.

The Fund may also purchase or sell futures contracts, options, forward contracts and swaps to obtain the Fund's desired exposure to an asset class or for return enhancement or hedging purposes, including currency or interest rate exposure. Futures contracts and forward contracts may be used to synthetically obtain exposure to securities or baskets of securities. The Fund may use total return swaps to efficiently obtain exposure to segments of the equity or fixed income markets when other means of obtaining exposure, such as through an ETF, are suboptimal. Interest rate swaps may be used to manage the Fund's yield spread sensitivity. The Fund may write (sell) or purchase call options or put options on a security or a basket of securities, and such options may be covered or uncovered (or "naked"). The purchaser of a call option will pay the Fund a premium for undertaking the obligations under the option contract. Options may also provide a

partial hedge to another position of the Fund. 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 a security or basket of securities.

The Fund may invest in U.S. dollar and non-U.S. dollar denominated securities. The Sub-Advisers may also seek to enhance the Fund's return by actively managing the Fund's foreign currency exposure. In managing the Fund's currency exposure, the Sub-Advisers may buy and sell currencies (i.e., take long or short positions) using futures and foreign currency forward contracts. The Fund may take long and short positions in foreign currencies in excess of the value of the Fund's assets denominated in a particular currency or when the Fund does not own assets denominated in that currency. The Fund may also engage in currency transactions in an attempt to take advantage of certain inefficiencies in the currency exchange market, to increase its exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one currency to another. In managing the Fund's currency exposure from foreign securities, the Sub-Advisers may buy and sell currencies for hedging or for speculative purposes.

MULTI-ASSET INFLATION MANAGED FUND - Class F Prospectus | SIMT MULTI-ASSET INFLATION MANAGED FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Fund will seek to generate "real return" (i.e., total returns that exceed the rate of inflation over a full market cycle, regardless of market conditions) by selecting investments from among a broad range of asset classes, including fixed income and equity securities and commodity investments. The asset classes used and the Fund's allocations among asset classes will be determined based on SEI Investments Management Corporation's (SIMC's) or the sub-advisers' (each, a Sub-Adviser and collectively, the Sub-Advisers) views of fundamental, technical or valuation measures. The Fund's allocations among asset classes may be adjusted over short periods of time. At any point in time, the Fund may be diversified across many asset classes or concentrated in a limited number of asset classes. The Fund may obtain its exposures to the asset classes by investing directly in securities and other investments or indirectly through the use of other pooled investment vehicles and derivative instruments.

The Fund uses a multi-manager approach under the general supervision of SIMC, allocating its assets among one or more Sub-Advisers using different investment strategies. SIMC may also directly manage a portion of the Fund's portfolio.

Equity securities may include common or preferred stocks, warrants, rights, depositary receipts, equity-linked securities and other equity interests. The Fund may invest in securities of issuers of any market capitalization and may invest in both foreign and domestic equity securities. In addition to direct investment in securities and other instruments, the Fund may invest in affiliated and unaffiliated funds, including open-end funds, closed-end funds and exchange-traded funds (ETFs). The Fund may also invest in real estate investment trusts (REITs) and U.S. and non-U.S. real estate companies.

In addition to direct investment in securities and other instruments, the Fund may invest in affiliated and unaffiliated funds, subject to the limitations of the Investment Company Act of 1940, as amended (1940 Act). Such investment may include open-end funds, money market funds, closed-end funds and ETFs (including leveraged and inverse ETFs). The Fund may also invest in REITs and securities issued by U.S. and non-U.S. real estate companies.

The Fund may invest in fixed income securities that are investment or non-investment grade (also known as junk bonds), U.S.- or foreign-issued (including emerging markets), and corporate- or government-issued. The Fund may invest in a wide range of fixed income investments, including obligations of U.S. and foreign commercial banks, such as certificates of deposit, time deposits, bankers' acceptances, bank notes and bank loans, obligations of foreign governments and obligations of supranational entities issued or guaranteed by certain banks, U.S. and foreign corporate debt securities, including commercial paper, and fully collateralized repurchase and reverse repurchase agreements with highly rated counterparties (those rated A or better) and securitized issues such as mortgage-backed securities, asset-backed securities, commercial mortgage-backed securities and collateralized debt obligations (CDOs). The Fund's fixed income investments may also include U.S. Treasury obligations, obligations issued by agencies or instrumentalities of the U.S. Government (including obligations not guaranteed by the U.S. Treasury), such as obligations issued by U.S. Government sponsored entities, Treasury Inflation

Protected Securities (TIPS) and other inflation-linked debt securities, and municipal bonds and debentures. The Fund may invest in fixed, variable and floating rate fixed income instruments. The Fund's portfolio and the Fund's investments in particular fixed income securities are not subject to any maturity or duration restrictions. The Fund may also enter into repurchase or reverse repurchase agreements with respect to its investment in the fixed income securities listed above and may use the cash received to enter into a short position on U.S. Treasury bonds.

A portion of the Fund's assets may also be invested in commodity investments to provide exposure to the investment returns of the commodities markets. Commodity investments include notes with interest payments that are tied to an underlying commodity or commodity index, ETFs or other exchange-traded products that are tied to the performance of a commodity or commodity index or other types of investment vehicles or instruments that provide returns that are tied to commodities or commodity indexes. The Fund may also invest in equity securities of issuers in commodity-related industries.

The Fund may also seek to gain exposure to the commodity markets, in whole or in part, through investments in a wholly owned subsidiary of the Fund organized under the laws of the Cayman Islands (Subsidiary). The Subsidiary, unlike the Fund, may invest to a significant extent in commodities, commodity contracts and commodity investments (including through derivative instruments). The Subsidiary may also invest in other instruments in which the Fund is permitted to invest, either as investments or to serve as margin or collateral for its derivative positions. The Fund may invest up to 25% of its total assets in the Subsidiary. The Subsidiary is advised by SIMC.

The Fund, either directly or through its investment in the Subsidiary, may also purchase or sell futures contracts, options, forward contracts and swaps to obtain the Fund's desired exposure to an asset class or for return enhancement or hedging purposes. Interest rate futures contracts are primarily used to hedge interest rate risk in the Fund's U.S. bond holdings. Commodity futures contracts are primarily used to obtain exposure to a diversified set of commodity markets. Interest rate swaps and swaps on indexes may further be used to manage the Fund's interest rate risk or may be used to manage the inflation-adjusted return of the Fund. 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 a security or basket of securities. Options may be used to gain exposure to or hedge exposures in the equity and commodity markets. Foreign currency forward rate agreements may be used to hedge all or a portion of the currency risk resulting from investments in non-U.S. equity and fixed income securities.

The Fund may invest in U.S. dollar and non-U.S. dollar denominated securities. The Sub-Advisers may also seek to enhance the Fund's return by actively managing the Fund's foreign currency exposure. In managing the Fund's currency exposure, the Sub-Advisers may buy and sell currencies (i.e., take long or short positions) using futures and foreign currency forward contracts. The Fund may take long and short positions in foreign currencies in excess of the value of the Fund's assets denominated in a particular currency or when the Fund does not own assets denominated in that currency. The Fund may also engage in currency transactions in an attempt to take advantage of certain inefficiencies in the currency exchange market, to increase its exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one currency to another. In managing the Fund's currency exposure from foreign securities, the Sub-Advisers may buy and sell currencies for hedging or for speculative purposes.

The Sub-Advisers may engage in short sales in an attempt to capitalize on equity securities that it believes will underperform the market or their peers. When a Sub-Adviser sells securities short, it may invest the proceeds from the short sales in an attempt to enhance returns. This strategy may effectively result in the Fund having a leveraged investment portfolio, which results in greater potential for loss.

MULTI-ASSET CAPITAL STABILITY FUND - Class F Prospectus | SIMT MULTI-ASSET CAPITAL STABILITY FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Fund will attempt to manage the risk of loss while still seeking to generate some growth by selecting investments from among a broad range of asset classes. Managing the risk of loss does not mean preventing losses, but rather managing the Fund in a manner intended to limit the level of losses that the Fund could incur over any particular period. The Fund's investments are expected to include U.S. debt obligations and investment grade bonds, and, to a lesser extent, riskier asset classes as detailed

below, such as equities and non-investment grade securities (also known as junk bonds). The asset classes used and the Fund's allocations among asset classes will be determined based on SEI Investments Management Corporation's (SIMC) or the sub-adviser's (each, a Sub-Adviser and collectively, the Sub-Advisers) views of fundamental, technical or valuation measures. The Fund's allocations among asset classes may be adjusted over short periods of time. At any point in time, the Fund may be diversified across many asset classes or concentrated in a limited number of asset classes. The Fund may obtain its exposures to the asset classes by investing directly in securities and other investments or indirectly through the use of other pooled investment vehicles and derivative instruments. Due to its investment strategy, the Fund may buy and sell securities and other instruments frequently.

SIMC directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach under the general supervision of SIMC, allocating Fund assets among one or more Sub-Advisers using different investment strategies.

The Fund may allocate all or a portion of its assets using a "risk parity" approach that seeks to balance anticipated drawdown risk (peak-to-trough decline in asset value) across all capital market exposures in the Fund. This approach may result in asset classes with lower perceived drawdown risk, e.g. high-quality government bonds, having a greater notional allocation within the Fund's portfolio than they would otherwise receive in a non-risk parity approach. Notional allocation generally refers to the Fund's use of one or more derivative contracts to obtain exposure to a potential gain or loss on the market value of the instruments underlying the Fund's derivative contracts (e.g., a security, basket of securities or index). The market value of such underlying instruments generally exceeds the amount of cash or assets required to establish or maintain the derivative contracts.

The Fund may further adjust asset allocations and capital market exposures based on realized and expected measures of drawdown risk with the goal of managing the Fund's total drawdown risk. This may result in the Fund increasing capital market exposures during periods of perceived falling drawdown risk and decreasing capital market exposures during periods of perceived rising drawdown risk.

The Fund may invest in equity securities, including common stocks, preferred stocks, convertible securities, and warrants, of U.S. and non-U.S. issuers (including emerging markets) of various market capitalizations and industries.

The Fund may invest in fixed income securities that are investment or non-investment grade (also known as junk bonds), U.S.- or foreign-issued (including emerging markets) and corporate- or government-issued. The Fund's fixed income investments may include asset-backed securities, mortgage-backed securities, corporate bonds and debentures, commercial paper, exchange traded notes (ETNs), money market instruments, mortgage dollar rolls, repurchase and reverse repurchase agreements, when issued/delayed delivery securities, zero coupon bonds, obligations of foreign governments and obligations of supranational entities issued or guaranteed by certain banks, as well as entities organized to restructure the outstanding debt of such issuers. The Fund's fixed income investments may also include U.S. Treasury obligations, obligations issued by agencies or instrumentalities of the U.S. Government (including obligations not guaranteed by the U.S. Treasury), such as obligations issued by U.S. Government sponsored entities, Treasury Inflation Protected Securities (TIPS) and other inflation-linked debt securities and obligations of U.S. and foreign commercial banks, such as certificates of deposit and time deposits. The Fund may invest in fixed, variable and floating rate fixed income instruments. The Fund's portfolio and the Fund's investments in particular fixed income securities are not subject to any maturity or duration restrictions.

The Fund may also invest a portion of its assets in bank loans, which are, generally, non-investment grade floating rate instruments, in the form of participations in the loans or assignments of all or a portion of the loans from third parties.

In addition to direct investment in securities and other instruments, the Fund may invest in affiliated and unaffiliated funds, subject to the limitations of the Investment Company Act of 1940, as amended (1940 Act). Such investment may include open-end funds, money market funds, closed-end funds and exchange-traded funds (ETFs) (including leveraged and inverse ETFs). The Fund may also invest in real estate investment trusts (REITs) and securities issued by U.S. and non-U.S. real estate companies.

The Fund may also purchase or sell futures contracts, options, forward contracts and swaps, including single security swaps, to obtain the Fund's desired exposure to an asset class or for return enhancement or hedging purposes. Due to the Fund's structure and level of turnover, derivative instruments may be an efficient method of obtaining exposure to various types of markets. Futures contracts may be used to gain exposure to U.S. and foreign sovereign bond markets. Index futures and securities index swaps may be used to gain exposure to U.S. and foreign equity markets. Interest rate swaps may be used to manage the Fund's yield spread sensitivity. Options may be used to gain exposure to or hedge risks in U.S. and foreign equity and fixed income markets. 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 a security or basket of securities. Foreign currency forward rate agreements may be used to hedge all or a portion of the currency risk resulting from investments in non-U.S. equity and fixed income securities.

The Fund may invest in U.S. dollar and non-U.S. dollar denominated securities. The Fund may also seek to enhance the Fund's return by actively managing the Fund's foreign currency exposure. In managing the Fund's currency exposure, the Fund may buy and sell currencies (i.e., take long or short positions) using futures contracts, foreign currency forward contracts and options. The Fund may take long and short positions in foreign currencies in excess of the value of the Fund's assets denominated in a particular currency or when the Fund does not own assets denominated in that currency. The Fund may also engage in currency transactions in an attempt to take advantage of certain inefficiencies in the currency exchange market, to increase its exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one currency to another. In managing the Fund's currency exposure from foreign securities, the Fund may buy and sell currencies for hedging or for speculative purposes.

MULTI-ASSET ACCUMULATION FUND - Class Y Prospectus | SIMT MULTI-ASSET ACCUMULATION FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Fund will seek to generate total return over time by selecting investments from among a broad range of asset classes based upon SEI Investments Management Corporation's (SIMC) or the sub-adviser's (each, a Sub-Adviser and collectively, the Sub-Advisers) expectations of risk and return. The asset classes used and the Fund's allocations among asset classes will be determined based on SIMC's or the Sub-Adviser's views of fundamental, technical or valuation measures. The Fund's allocations among asset classes may be adjusted over short periods of time. At any point in time, the Fund may be diversified across many asset classes or concentrated in a limited number of asset classes. The Fund may obtain its exposures to the asset classes by investing directly in securities and other investments or indirectly through the use of other pooled investment vehicles and derivative instruments.

SIMC directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach under the general supervision of SIMC, allocating Fund assets among one or more Sub-Advisers using different investment strategies.

The Fund may allocate all or a portion of its assets using a "risk parity" approach that seeks to balance risk across all capital market exposures, which may result in asset classes with lower perceived risk having a greater notional allocation within the Fund's portfolio than asset classes with higher perceived risk. Notional allocation refers to the Fund's use of one or more derivative contracts to attempt to obtain exposure to a potential gain or loss on the market value of the instruments underlying the Fund's derivative contracts (e.g., a security, currency or commodity (or a basket or index)). The market value of such underlying instruments generally exceeds the amount of cash or assets required to establish or maintain the derivative contracts. In addition, the Fund may further adjust asset allocations and capital market exposures based on realized and expected measures of volatility with the goal of managing the Fund's volatility. This may result in the Fund increasing capital market exposures during periods of perceived falling risk and decreasing capital market exposures during periods of perceived rising risk.

The Fund may invest in equity securities, including common stocks, preferred stocks, convertible securities, warrants and depositary receipts of U.S. and non-U.S. issuers (including emerging markets) of various market capitalizations and industries.

The Fund may invest in fixed income securities that are investment or non-investment grade (also known as junk bonds), U.S.- or foreign-issued (including emerging markets) and corporate- or government-issued.

The Fund's fixed income investments may include asset-backed securities, mortgage-backed securities, corporate bonds and debentures, commercial paper, exchange traded notes (ETNs), money market instruments, mortgage dollar rolls, repurchase and reverse repurchase agreements, when issued/delayed delivery securities, zero coupon bonds, obligations of foreign governments and obligations of either supranational entities issued or guaranteed by certain banks and entities organized to restructure the outstanding debt of such issuers. The Fund's fixed income investments may also include obligations of U.S. and foreign banks, such as certificates of deposit and time deposits, U.S. Treasury obligations, obligations issued by agencies or instrumentalities of the U.S. Government (including obligations not guaranteed by the U.S. Treasury), such as obligations issued by U.S. Government sponsored entities, and Treasury Inflation Protected Securities (TIPS) and other inflation-linked debt securities of both U.S. and non-U.S. governments and corporations, and municipal bonds and debentures. The Fund may invest in fixed, variable and floating rate fixed income instruments. The Fund's portfolio and the Fund's investments in particular fixed income securities are not subject to any maturity or duration restrictions.

The Fund may also invest a portion of its assets in bank loans, which are, generally, non-investment grade floating rate instruments, in the form of participations in the loans or assignments of all or a portion of the loans from third parties.

In addition to direct investment in securities and other instruments, the Fund may invest in affiliated and unaffiliated funds, subject to the limitations of the Investment Company Act of 1940, as amended (1940 Act). Such investment may include open-end funds, money market funds, closed-end funds and exchange-traded funds (ETFs) (including leveraged and inverse ETFs). The Fund may also invest in real estate investment trusts (REITs) and securities issued by U.S. and non-U.S. real estate companies.

A portion of the Fund's assets may also be invested in commodity investments to provide exposure to the investment returns of the commodities markets. Commodity investments include notes with interest payments that are tied to an underlying commodity or commodity index, ETFs or other exchange-traded products that are tied to the performance of a commodity or commodity index or other types of investment vehicles or instruments that provide returns that are tied to commodities or commodity indexes. The Fund may also invest in equity securities of issuers in commodity-related industries.

The Fund may also seek to gain exposure to the commodity markets, in whole or in part, through investments in a wholly owned subsidiary of the Fund organized under the laws of the Cayman Islands (Subsidiary). The Subsidiary, unlike the Fund, may invest to a significant extent in commodities, commodity contracts and commodity investments (including through derivatives). The Subsidiary may also invest in other instruments in which the Fund is permitted to invest, either as investments or to serve as margin or collateral for its derivative positions. The Fund may invest up to 25% of its total assets in the Subsidiary. The Subsidiary is advised by SIMC.

The Fund, either directly or through its investment in the Subsidiary, may also purchase or sell futures contracts, options, forward contracts and swaps to obtain the Fund's desired exposure to an asset class or for return enhancement or hedging purposes. Futures contracts, forward contracts, options and swaps may be used to synthetically obtain exposure to securities or baskets of securities and to manage the Fund's interest rate duration and yield curve exposure. Due to the Fund's structure and level of turnover, derivative instruments may be an efficient method of obtaining exposure to various types of markets. Interest rate swaps are further used to manage the Fund's yield spread sensitivity. Securities index swaps may be used to obtain exposure to different U.S. and foreign equity markets. Futures and swaps on futures may be used to gain exposure to U.S. and foreign sovereign bond markets, equity markets and commodities markets. 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 a security or basket of securities.

The Fund may invest in U.S. dollar and non-U.S. dollar denominated securities. The Sub-Advisers may also seek to enhance the Fund's return by actively managing the Fund's foreign currency exposure. In managing the Fund's currency exposure, the Sub-Advisers may buy and sell currencies (i.e., take long or short positions) using futures and foreign currency forward contracts. The Fund may take long and short positions in foreign currencies in excess of the value of the Fund's assets denominated in a particular currency or when the Fund does not own assets denominated in that currency. The Fund may also engage in currency transactions in an attempt to take advantage of certain inefficiencies in the currency exchange market, to increase its exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one currency to another. In managing the Fund's currency exposure from foreign securities, the Sub-Advisers may buy and sell currencies for hedging or for speculative purposes.

MULTI-ASSET INCOME FUND - Class Y Prospectus | SIMT MULTI-ASSET INCOME FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Fund will seek to generate total return with an emphasis on income by selecting investments from among a broad range of asset classes based upon SEI Investments Management Corporation's (SIMC) or the sub-adviser's (each, a Sub-Adviser and collectively, the Sub-Advisers) expectations for income and, to a lesser extent, capital appreciation. The asset classes used and the Fund's allocations among asset classes will be determined based on SIMC's or the Sub-Adviser's views of

fundamental, technical or valuation measures. The Fund's allocations among asset classes may be adjusted over short periods of time. At any point in time, the Fund may be diversified across many asset classes or concentrated in a limited number of asset classes. The Fund may obtain its exposures to the asset classes by investing directly in securities and other investments or indirectly through the use of other pooled investment vehicles and derivative instruments.

SIMC directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach under the general supervision of SIMC, allocating Fund assets among one or more Sub-Advisers using different investment strategies.

The Fund may invest in equity securities, including common stocks, preferred stocks, convertible securities, warrants and depositary receipts, of U.S. and non-U.S. issuers (including emerging markets) of various market capitalizations and industries.

The Fund may invest in fixed income securities that are investment or non-investment grade (also known as junk bonds), U.S.- or foreign-issued (including emerging markets) and corporate- or government-issued. The Fund may invest in a wide range of fixed income investments, including asset-backed securities, mortgage-backed securities, collateralized debt and collateralized loan obligations (CDOs and CLOs, respectively), corporate and municipal bonds and debentures, structured notes, construction loans, commercial paper, exchange traded notes (ETNs), money market instruments, mortgage dollar rolls, repurchase and reverse repurchase agreements, when issued/delayed delivery securities, zero coupon bonds, obligations of foreign governments and obligations of supranational entities issued or guaranteed by certain banks. The Fund's fixed income investments may also include U.S. Treasury obligations, obligations issued by agencies or instrumentalities of the U.S. Government (including obligations not guaranteed by the U.S. Treasury), such as obligations issued by U.S. Government sponsored entities, and Treasury Inflation Protected Securities (TIPS) and other inflation-linked debt securities. The Fund may invest in fixed, variable and floating rate fixed income instruments. The Fund's portfolio and the Fund's investments in particular fixed income securities are not subject to any maturity or duration restrictions.

The Fund may invest up to 25% of its assets in master limited partnership (MLP) units and may also invest a portion of its assets in bank loans, which are, generally, non-investment grade floating rate instruments, in the form of participations in the loans or assignments of all or a portion of the loans from third parties.

In addition to direct investment in securities and other instruments, the Fund may invest in affiliated and unaffiliated funds, subject to the limitations of the Investment Company Act of 1940, as amended (1940 Act). Such investment may include open-end funds, money market funds, closed-end funds and exchange-traded funds (ETFs) (including leveraged and inverse ETFs). The Fund may also invest in real estate investment trusts (REITs) and securities issued by U.S. and non-U.S. real estate companies.

The Fund may also purchase or sell futures contracts, options, forward contracts and swaps to obtain the Fund's desired exposure to an asset class or for return enhancement or hedging purposes, including currency or interest rate exposure. Futures contracts and forward contracts may be used to synthetically obtain exposure to securities or baskets of securities. The Fund may use total return swaps to efficiently obtain exposure to segments of the equity or fixed income markets when other means of obtaining exposure, such as through an ETF, are suboptimal. Interest rate swaps may be used to manage the Fund's yield spread sensitivity. The Fund may write (sell) or purchase call options or put options on a security or a basket of securities, and such options may be covered or uncovered (or "naked"). The purchaser of a call option will pay the Fund a premium for undertaking the obligations under the option contract. Options may also provide a

partial hedge to another position of the Fund. 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 a security or basket of securities.

The Fund may invest in U.S. dollar and non-U.S. dollar denominated securities. The Sub-Advisers may also seek to enhance the Fund's return by actively managing the Fund's foreign currency exposure. In managing the Fund's currency exposure, the Sub-Advisers may buy and sell currencies (i.e., take long or short positions) using futures and foreign currency forward contracts. The Fund may take long and short positions in foreign currencies in excess of the value of the Fund's assets denominated in a particular currency or when the Fund does not own assets denominated in that currency. The Fund may also engage in currency transactions in an attempt to take advantage of certain inefficiencies in the currency exchange market, to increase its exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one currency to another. In managing the Fund's currency exposure from foreign securities, the Sub-Advisers may buy and sell currencies for hedging or for speculative purposes.

MULTI-ASSET INFLATION MANAGED FUND - Class Y Prospectus | SIMT MULTI-ASSET INFLATION MANAGED FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Fund will seek to generate "real return" (i.e., total returns that exceed the rate of inflation over a full market cycle, regardless of market conditions) by selecting investments from among a broad range of asset classes, including fixed income and equity securities and commodity investments. The asset classes used and the Fund's allocations among asset classes will be determined based on SEI Investments Management Corporation's (SIMC's) or the sub-advisers' (each, a Sub-Adviser and collectively, the Sub-Advisers) views of fundamental, technical or valuation measures. The Fund's allocations among asset classes may be adjusted over short periods of time. At any point in time, the Fund may be diversified across many asset classes or concentrated in a limited number of asset classes. The Fund may obtain its exposures to the asset classes by investing directly in securities and other investments or indirectly through the use of other pooled investment vehicles and derivative instruments.

The Fund uses a multi-manager approach under the general supervision of SIMC, allocating its assets among one or more Sub-Advisers using different investment strategies. SIMC may also directly manage a portion of the Fund's portfolio.

Equity securities may include common or preferred stocks, warrants, rights, depositary receipts, equity-linked securities and other equity interests. The Fund may invest in securities of issuers of any market capitalization and may invest in both foreign and domestic equity securities. In addition to direct investment in securities and other instruments, the Fund may invest in affiliated and unaffiliated funds, including open-end funds, closed-end funds and exchange-traded funds (ETFs). The Fund may also invest in real estate investment trusts (REITs) and U.S. and non-U.S. real estate companies.

In addition to direct investment in securities and other instruments, the Fund may invest in affiliated and unaffiliated funds, subject to the limitations of the Investment Company Act of 1940, as amended (1940 Act). Such investment may include open-end funds, money market funds, closed-end funds and ETFs (including leveraged and inverse ETFs). The Fund may also invest in REITs and securities issued by U.S. and non-U.S. real estate companies.

The Fund may invest in fixed income securities that are investment or non-investment grade (also known as junk bonds), U.S.- or foreign-issued (including emerging markets), and corporate- or government-issued. The Fund may invest in a wide range of fixed income investments, including obligations of U.S. and foreign commercial banks, such as certificates of deposit, time deposits, bankers' acceptances, bank notes and bank loans, obligations of foreign governments and obligations of supranational entities issued or guaranteed by certain banks, U.S. and foreign corporate debt securities, including commercial paper, and fully collateralized repurchase and reverse repurchase agreements with highly rated counterparties (those rated A or better) and securitized issues such as mortgage-backed securities, asset-backed securities, commercial mortgage-backed securities and collateralized debt obligations (CDOs). The Fund's fixed income investments may also include U.S. Treasury obligations, obligations issued by agencies or instrumentalities of the U.S. Government

(including obligations not guaranteed by the U.S. Treasury), such as obligations issued by U.S. Government sponsored entities, Treasury Inflation Protected Securities (TIPS) and other inflation-linked debt securities, and municipal bonds and debentures. The Fund may invest in fixed, variable and floating rate fixed income instruments. The Fund's portfolio and the Fund's investments in particular fixed income securities are not subject to any maturity or duration restrictions. The Fund may also enter into repurchase or reverse repurchase agreements with respect to its investment in the fixed income securities listed above and may use the cash received to enter into a short position on U.S. Treasury bonds.

A portion of the Fund's assets may also be invested in commodity investments to provide exposure to the investment returns of the commodities markets. Commodity investments include notes with interest payments that are tied to an underlying commodity or commodity index, ETFs or other exchange-traded products that are tied to the performance of a commodity or commodity index or other types of investment vehicles or instruments that provide returns that are tied to commodities or commodity indexes. The Fund may also invest in equity securities of issuers in commodity-related industries.

The Fund may also seek to gain exposure to the commodity markets, in whole or in part, through investments in a wholly owned subsidiary of the Fund organized under the laws of the Cayman Islands (Subsidiary). The Subsidiary, unlike the Fund, may invest to a significant extent in commodities, commodity contracts and commodity investments (including through derivative instruments). The Subsidiary may also invest in other instruments in which the Fund is permitted to invest, either as investments or to serve as margin or collateral for its derivative positions. The Fund may invest up to 25% of its total assets in the Subsidiary. The Subsidiary is advised by SIMC.

The Fund, either directly or through its investment in the Subsidiary, may also purchase or sell futures contracts, options, forward contracts and swaps to obtain the Fund's desired exposure to an asset class or for return enhancement or hedging purposes. Interest rate futures contracts are primarily used to hedge interest rate risk in the Fund's U.S. bond holdings. Commodity futures contracts are primarily used to obtain exposure to a diversified set of commodity markets. Interest rate swaps and swaps on indexes may further be used to manage the Fund's interest rate risk or may be used to manage the inflation-adjusted return of the Fund. 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 a security or basket of securities. Options may be used to gain exposure to or hedge exposures in the equity and commodity markets. Foreign currency forward rate agreements may be used to hedge all or a portion of the currency risk resulting from investments in non-U.S. equity and fixed income securities.

The Fund may invest in U.S. dollar and non-U.S. dollar denominated securities. The Sub-Advisers may also seek to enhance the Fund's return by actively managing the Fund's foreign currency exposure. In managing the Fund's currency exposure, the Sub-Advisers may buy and sell currencies (i.e., take long or short positions) using futures and foreign currency forward contracts. The Fund may take long and short positions in foreign currencies in excess of the value of the Fund's assets denominated in a particular currency or when the Fund does not own assets denominated in that currency. The Fund may also engage in currency transactions in an attempt to take advantage of certain inefficiencies in the currency exchange market, to increase its exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one currency to another. In managing the Fund's currency exposure from foreign securities, the Sub-Advisers may buy and sell currencies for hedging or for speculative purposes.

The Sub-Advisers may engage in short sales in an attempt to capitalize on equity securities that it believes will underperform the market or their peers. When a Sub-Adviser sells securities short, it may invest the proceeds from the short sales in an attempt to enhance returns. This strategy may effectively result in the Fund having a leveraged investment portfolio, which results in greater potential for loss.

MULTI-ASSET CAPITAL STABILITY FUND - Class Y Prospectus | SIMT MULTI-ASSET CAPITAL STABILITY FUND

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies

Strategy Narrative [Text Block]

Under normal circumstances, the Fund will attempt to manage the risk of loss while still seeking to generate some growth by selecting investments from among a broad range of asset classes. Managing the risk of loss does not mean preventing losses, but rather managing the Fund in a manner intended to limit the level of losses that the Fund could incur over any particular period. The Fund's investments are expected to include U.S. debt obligations and investment grade bonds, and, to a lesser extent, riskier asset classes as detailed

below, such as equities and non-investment grade securities (also known as junk bonds). The asset classes used and the Fund's allocations among asset classes will be determined based on SEI Investments Management Corporation's (SIMC) or the sub-adviser's (each, a Sub-Adviser and collectively, the Sub-Advisers) views of fundamental, technical or valuation measures. The Fund's allocations among asset classes may be adjusted over short periods of time. At any point in time, the Fund may be diversified across many asset classes or concentrated in a limited number of asset classes. The Fund may obtain its exposures to the asset classes by investing directly in securities and other investments or indirectly through the use of other pooled investment vehicles and derivative instruments. Due to its investment strategy, the Fund may buy and sell securities and other instruments frequently.

SIMC directly manages a portion of the Fund's assets. With the remaining assets, the Fund uses a multi-manager approach under the general supervision of SIMC, allocating Fund assets among one or more Sub-Advisers using different investment strategies.

The Fund may allocate all or a portion of its assets using a "risk parity" approach that seeks to balance anticipated drawdown risk (peak-to-trough decline in asset value) across all capital market exposures in the Fund. This approach may result in asset classes with lower perceived drawdown risk, e.g. high-quality government bonds, having a greater notional allocation within the Fund's portfolio than they would otherwise receive in a non-risk parity approach. Notional allocation generally refers to the Fund's use of one or more derivative contracts to obtain exposure to a potential gain or loss on the market value of the instruments underlying the Fund's derivative contracts (e.g., a security, basket of securities or index). The market value of such underlying instruments generally exceeds the amount of cash or assets required to establish or maintain the derivative contracts.

The Fund may further adjust asset allocations and capital market exposures based on realized and expected measures of drawdown risk with the goal of managing the Fund's total drawdown risk. This may result in the Fund increasing capital market exposures during periods of perceived falling drawdown risk and decreasing capital market exposures during periods of perceived rising drawdown risk.

The Fund may invest in equity securities, including common stocks, preferred stocks, convertible securities, and warrants, of U.S. and non-U.S. issuers (including emerging markets) of various market capitalizations and industries.

The Fund may invest in fixed income securities that are investment or non-investment grade (also known as junk bonds), U.S.- or foreign-issued (including emerging markets) and corporate- or government-issued. The Fund's fixed income investments may include asset-backed securities, mortgage-backed securities, corporate bonds and debentures, commercial paper, exchange traded notes (ETNs), money market instruments, mortgage dollar rolls, repurchase and reverse repurchase agreements, when issued/delayed delivery securities, zero coupon bonds, obligations of foreign governments and obligations of supranational entities issued or guaranteed by certain banks, as well as entities organized to restructure the outstanding debt of such issuers. The Fund's fixed income investments may also include U.S. Treasury obligations, obligations issued by agencies or instrumentalities of the U.S. Government (including obligations not guaranteed by the U.S. Treasury), such as obligations issued by U.S. Government sponsored entities, Treasury Inflation Protected Securities (TIPS) and other inflation-linked debt securities and obligations of U.S. and foreign commercial banks, such as certificates of deposit and time deposits. The Fund may invest in fixed, variable and floating rate fixed income instruments. The Fund's portfolio and the Fund's investments in particular fixed income securities are not subject to any maturity or duration restrictions.

The Fund may also invest a portion of its assets in bank loans, which are, generally, non-investment grade floating rate instruments, in the form of participations in the loans or assignments of all or a portion of the loans from third parties.

In addition to direct investment in securities and other instruments, the Fund may invest in affiliated and unaffiliated funds, subject to the limitations of the Investment Company Act of 1940, as amended (1940 Act). Such investment may include open-end funds, money market funds, closed-end funds and exchange-traded funds (ETFs) (including leveraged and inverse ETFs). The Fund may also invest in real estate investment trusts (REITs) and securities issued by U.S. and non-U.S. real estate companies.

The Fund may also purchase or sell futures contracts, options, forward contracts and swaps, including single security swaps, to obtain the Fund's desired exposure to an asset class or for return enhancement or hedging purposes. Due to the Fund's structure and level of turnover, derivative instruments may be an efficient method of obtaining exposure to various types of markets. Futures contracts may be used to gain exposure to U.S. and foreign sovereign bond markets. Index futures and securities index swaps may be used to gain exposure to U.S. and foreign equity markets. Interest rate swaps may be used to manage the Fund's yield spread sensitivity. Options may be used to gain exposure to or hedge risks in U.S. and foreign equity and fixed income markets. 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 a security or basket of securities. Foreign currency forward rate agreements may be used to hedge all or a portion of the currency risk resulting from investments in non-U.S. equity and fixed income securities.

The Fund may invest in U.S. dollar and non-U.S. dollar denominated securities. The Fund may also seek to enhance the Fund's return by actively managing the Fund's foreign currency exposure. In managing the Fund's currency exposure, the Fund may buy and sell currencies (i.e., take long or short positions) using futures contracts, foreign currency forward contracts and options. The Fund may take long and short positions in foreign currencies in excess of the value of the Fund's assets denominated in a particular currency or when the Fund does not own assets denominated in that currency. The Fund may also engage in currency transactions in an attempt to take advantage of certain inefficiencies in the currency exchange market, to increase its exposure to a foreign currency or to shift exposure to foreign currency fluctuations from one currency to another. In managing the Fund's currency exposure from foreign securities, the Fund may buy and sell currencies for hedging or for speculative purposes.