Summary Prospectus by Investment Company (Form 497K)

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Under normal market conditions, the Fund will invest substantially all, and normally at least 80% of its total assets in the equity securities (primarily common stocks and stock index derivatives) included in the S&P 500® Index, in weightings that approximate the relative composition of the securities contained in the S&P 500® Index. The Fund may become non-diversified, as defined under the Investment Company Act of 1940, as amended, solely as a result of a change in relative market capitalization or index weighting of one or more constituents of the index. In addition, the Fund could become concentrated in an industry or group of industries if the index becomes concentrated due to market conditions or the performance of a single or related group of issuers.

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Pursuing its investment strategy to duplicate the investment composition of the S&P 500® Index may at times cause the Fund to focus its investments in one or a few particular economic sectors or industries.

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Under normal market conditions, the Fund will invest substantially all, and normally at least 80% of its total assets in the equity securities (primarily common stocks and stock index derivatives) included in the Russell 1000® Value Index, in weightings that approximate the relative composition of the securities contained in the Russell 1000® Value Index. The Fund may become non-diversified, as defined under the Investment Company Act of 1940, as amended, solely as a result of a change in relative market capitalization or index weighting of one or more constituents of the index. In addition, the Fund could become concentrated in an industry or group of industries if the index becomes concentrated due to market conditions or the performance of a single or related group of issuers.

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Pursuing its investment strategy to duplicate the investment composition of the Russell 1000® Value Index may at times cause the Fund to focus its investments in one or a few particular economic sectors or industries.

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Under normal market conditions, the Fund will invest substantially all, and normally at least 80% of its total assets in the equity securities (primarily common stocks and stock index derivatives) included in the Russell 1000® Growth Index, in weightings that approximate the relative composition of the securities contained in the Russell 1000® Growth Index. The Fund may become non-diversified, as defined under the Investment Company Act of 1940, as amended, solely as a result of a change in relative market capitalization or index weighting of one or more constituents of the index. In addition, the Fund could become concentrated in an industry or group of industries if the index becomes concentrated due to market conditions or the performance of a single or related group of issuers.

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Pursuing its investment strategy to duplicate the investment composition of the Russell 1000® Growth Index may at times cause the Fund to focus its investments in one or a few particular economic sectors or industries.

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Under normal market conditions, the Fund will invest substantially all, and normally at least 80% of its total assets in the equity securities (primarily common stocks and stock index derivatives) included in the MSCI EAFE Index, in weightings that approximate the relative composition of the securities contained in the MSCI EAFE Index. The Fund may become non-diversified, as defined under the Investment Company Act of 1940, as amended, solely as a result of a change in relative market capitalization or index weighting of one or more constituents of the index. In addition, the Fund could become concentrated in an industry or group of industries if the index becomes concentrated due to market conditions or the performance of a single or related group of issuers.

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Pursuing its investment strategy to duplicate the investment composition of the MSCI EAFE Index may at times cause the Fund to focus its investments in one or a few particular economic sectors or industries.

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Sector Concentration Risk: The Fund may be heavily invested in a particular economic sector. If the Fund focuses on one or a few sectors, its performance is likely to be disproportionately affected by developments that significantly affect that sector, including market, economic, political or regulatory developments. Individual sectors may be more volatile and may perform differently than the broader market. The Fund's performance may also suffer if a sector does not perform as well as a Sub-Adviser expected. Prices of securities in the same sector often change collectively regardless of the merits of individual companies.

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Concentration Risk: Except as may be necessary to approximate the composition of its index, the Fund will not concentrate its investments in the securities of issuers whose principal business activities are in the same industry or group of industries. If the index becomes concentrated and the Fund needs to concentrate in the same industry or group of industries, its performance could be negatively impacted by the industry or industries in which it is concentrated.

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Information Technology Sector Risk: Market or economic factors impacting information technology companies and companies that rely heavily on technological advances (including semiconductor companies) could have a significant effect on the value of the Fund's investments. The value of stocks of information technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from foreign competitors with lower production costs. Stocks of information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.

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Concentration Risk: Except as may be necessary to approximate the composition of its index, the Equity Index Fund, Value Equity Index Fund, Growth Equity Index Fund and International Equity Index Fund will not concentrate investments in the securities of issuers whose principal business activities are in the same industry or group of industries. However, it is possible that an index could become concentrated due to market conditions or the performance of a single or related group of issuers. If an index becomes concentrated and a Fund needs to concentrate in the same industry or group of industries, its performance could be negatively impacted by the industry or industries in which it is concentrated.

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Information Technology Sector Risk: Companies operating within the information technology sector, (including semiconductor companies) may be affected by worldwide technological developments, the success of their products and services (which may be outdated quickly), anticipated products or services that are delayed or cancelled and investor perception of the company and/or its products or services. These companies typically face intense competition and potentially rapid product obsolescence. They may also have limited product lines, markets, financial resources or personnel. Technology companies are also heavily dependent on intellectual property rights and may be adversely affected by loss or impairment of those rights. There can be no assurance these companies will be able to successfully protect their intellectual property to prevent the misappropriation of their technology, or that competitors will not develop technology that is substantially similar or superior to such companies' technology. These companies typically engage in significant amounts of spending on research and development, and there is no guarantee that the products or services produced by these companies will be successful. Technology companies are also potential targets for cyberattacks, which can have a materially adverse impact on the performance of these companies. The customers and/or suppliers of technology companies may be concentrated in a particular country, region or industry. Any adverse event affecting one of these countries, regions or industries

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Effective July 1, 2028, Mr. Babyak will transition into an advisory role and remain an equity partner of the firm and will no longer serve as a portfolio managaer to the Fund.