787 Seventh Avenue
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March 22, 2013

VIA EDGAR

Securities and Exchange Commission

100 F Street, NE

Washington, DC 20549

Re: BlackRock Allocation Target Shares

BATS: Series C Portfolio

BATS: Series M Portfolio

BATS: Series P Portfolio

BATS: Series S Portfolio

       (File No. 333-109980 and File No. 811-21457)

Ladies and Gentlemen:

On behalf of BlackRock Allocation Target Shares 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 the Registrant’s prospectus dated November 27, 2012, as amended March 14, 2013. The purpose of the filing is to submit the 497(e) filing dated March 14, 2013 in XBRL for the Registrant.

Any questions or comments on this filing should be directed to the undersigned at 212-728-8510.

Very truly yours,

/s/ Anthony Geron

Anthony Geron

Enclosures

cc:  Ben Archibald, Esq., BlackRock Advisors, LLC