
EMERGING MARKETS PORTFOLIO
EMERGING MARKETS PORTFOLIO
Prospectus Supplement September 17, 2013 Morgan Stanley Institutional Fund, Inc. Supplement dated September 17, 2013 to the Morgan Stanley Institutional Fund, Inc. (the "Fund") Prospectus dated April 30, 2013 of: Active International Allocation Portfolio Asian Equity Portfolio Emerging Markets Portfolio Frontier Emerging Markets Portfolio Global Franchise Portfolio International Equity Portfolio International Small Cap Portfolio Select Global Infrastructure Portfolio (collectively, the "Portfolios")
The table below describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. For purchases of Class A shares, you may qualify for a sales charge discount if the cumulative net asset value ("NAV") of Class A shares of the Portfolio purchased in a single transaction, together with the NAV of all Class A shares of other portfolios of Morgan Stanley Institutional Fund, Inc. (the "Fund") or Class A shares of other Morgan Stanley Multi-Class Funds (as defined in the "Shareholder Information—Exchange Privilege" section on page 66 of this Prospectus) held in Related Accounts (as defined in the "Shareholder Information—How To Purchase Class A Shares" section on page 62 of this Prospectus), amounts to $25,000 or more. More information about this combined purchase discount and other discounts is available from your financial adviser and in the "Shareholder Information—How To Purchase Class A Shares" section on page 62 of this Prospectus. Please retain this supplement for future reference.

This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown. The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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