|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 and heat shock protein 90 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. You should not place undue reliance on these forward-looking statements as 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 in Infinity’s current report on Form 8-K filed with the SEC on December 12, 2012, and in other filings that Infinity makes with the SEC. Any forward-looking statements contained in this press release speak only as of the date hereof, and Infinity anticipates that subsequent events and developments will cause its views to change. While Infinity may elect to update these forward-looking statements at some point in the future, Infinity expressly disclaims any obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise.