497 1 d422225d497.htm XBRL LETTER XBRL LETTER
LOGO    787 Seventh Avenue
   New York, NY 10019-6099
   Tel: 212 728 8000
   Fax: 212 728 8111

October 24, 2012


Securities and Exchange Commission

100 F Street, NE

Washington, DC 20549



   BlackRock Long-Horizon Equity Fund

(File No. 333-124372 and File No. 811-21759)

Ladies and Gentlemen:

On behalf of BlackRock Long-Horizon Equity Fund (the “Fund”) and pursuant to Rule 497(e) 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 supplement, dated October 15, 2012, to the Prospectus, dated February 28, 2012, for the Fund. The purpose of the filing is to submit the 497(e) filing dated October 15, 2012 in XBRL for the Fund.

Any questions or comments on this filing should be directed to the undersigned at 212-728-8865.


Very truly yours,

/s/ Ryan P. Brizek

Ryan P. Brizek




   Ben Archibald, Esq., BlackRock Advisors, LLC