SEWARD & KISSEL LLP

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Washington, DC 20001

Telephone: (202) 737-8833

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www.sewkis.com

February 20, 2013

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

 

  Re: AllianceBernstein Institutional Funds, Inc.

File Nos. 333-37177 and 811-08403

Accession No. 0001193125-13-038597

Dear Sir or Madam:

On behalf of the Registrant and pursuant to Rule 497(c) under the Securities Act of 1933, as amended, attached for filing are exhibits containing interactive data format risk/return summary information that mirrors the risk/return summary information in a filing, dated February 5, 2013, Accession No. 0001193125-13-038597, to the Prospectus, dated January 31, 2013, for the AllianceBernstein Institutional Funds, Inc. (the “Fund”). The purpose of the filing is to submit the Rule 497(c) filing dated February 5, 2013 in interactive data for the Fund.

Please call me at the above-referenced number if you have any questions regarding the attached.

Sincerely,

/s/ Anna C. Leist

     Anna C. Leist

Attachment

Index to Exhibits

 

Exhibit No.

  

Description of Exhibits

EX-101.INS    XBRL Instance Document
EX-101.SCH    XBRL Taxonomy Extension Schema Document
EX-101.CALC    XBRL Taxonomy Extension Calculation Linkbase
EX-101.DEF    XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB    XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE    XBRL Taxonomy Extension Presentation Linkbase
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