|Morgan Stanley & Co. LLC||J.P. Morgan Securities LLC|
|Attn: Prospectus Department||c/o Broadridge Financial Solutions|
|180 Varick Street, 2nd Floor||1155 Long Island Avenue|
|New York, NY 10014||Edgewood, NY 11717|
|Phone: 866-718-1649||Phone: 866-803-9204|
About Infinity Pharmaceuticals, Inc.Infinity is an innovative drug discovery and development company seeking to discover, develop and deliver to patients best-in-class medicines for diseases with significant unmet need. Infinity combines proven scientific expertise with a passion for developing novel small molecule drugs that target emerging disease pathways. Infinity’s programs focused on the inhibition of phosphoinositide-3-kinase, heat shock protein 90 and fatty acid amide hydrolase are evidence of its innovative approach to drug discovery and development. Forward-Looking Statements This press release contains forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. Actual results may differ materially from those projected or implied in these forward-looking statements. Factors that may cause such a difference include, without limitation, risks and uncertainties relating to Infinity’s business, which can be found under the caption “Risk Factors” included in Infinity's quarterly report on Form 10-Q for the quarterly period ended June 30, 2012, filed with the SEC on August 7, 2012. Any forward-looking statements contained in this press release speak only as of the date hereof, and Infinity expressly disclaims any obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise.