Mutual of America Institutional Funds, Inc., a no-load mutual fund, is available to organizations, endowments, foundations, trusts, municipalities and other institutional investors. The Institutional Funds include equity, fixed income and money market portfolios. Please note that an investment in the Institutional Funds is subject to investment risk and that your principal may increase or decrease. Mutual of America Capital Management Corporation is the investment adviser. The funds of Mutual of America Institutional Funds, Inc., are listed with the NASDAQ OMX mutual fund quotation service under the following ticker symbols: Money Market Fund (MAFXX); Bond Fund (MABOX); Equity Index Fund (MAEQX); All America Fund (MALLX); Small Cap Value Fund (MAVSX); Small Cap Growth Fund (MASSX); Mid-Cap Equity Index Fund (MAMQX). Mutual of America Securities Corporation, a registered Broker-Dealer and member of FINRA and SIPC, is the distributor of Fund shares.

Before investing in Mutual of America Institutional Funds, Inc., you should consider the investment objectives, risks, charges and expenses carefully. This and other information is contained in the prospectus and the XBRL documents. XBRL refers to an interactive data format using eXtensible Business Reporting Language ("XBRL"). The interactive data is provided in exhibits to the prospectuses containing risk/return summary information in a coded format that allows comparisons of this information to similar sections of other mutual funds. Please read the prospectus carefully before investing. The prospectus can be obtained by calling 1-800-914-8716. Please note that an investment in the Institutional Funds is subject to investment risk and that your principal may increase or decrease.

MUTUAL OF AMERICA INSTITUTIONAL FUNDS, INC.
320 PARK AVENUE
NEW YORK, NY 10022