On July 30, 2012, Astex Pharmaceuticals, Inc. (the "Company") issued a press release announcing its financial results for the quarter and six months ended June 30, 2012. The full text of this press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference herein.

In accordance with General Instruction B.2. of Form 8-K, the information in this Current Report on Form 8-K and the Exhibit attached hereto is being "furnished" and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended (the "Securities Act") or the Exchange Act, except if the Company specifically states that the information and the Exhibit is to be considered "filed" under the Exchange Act or incorporates it by reference into a filing under the Securities Act or the Exchange Act.

(d) Exhibits

Exhibit
No.                                      Description

99.1       Press release dated July 30, 2012, announcing financial results for the
           quarter and six months ended June 30, 2012 (solely furnished and not
           filed herewith, pursuant to Item 2.02).