Investors/Media

CAMBRIDGE, Mass.--(BUSINESS WIRE)--Aug. 8, 2012-- Infinity Pharmaceuticals, Inc. (NASDAQ: INFI) today announced that it has commenced an underwritten public offering of shares of its common stock. All of the shares in the offering are to be sold by Infinity.

Morgan Stanley & Co. LLC and J.P. Morgan Securities LLC are acting as joint book-running managers for the proposed offering. Infinity intends to grant the underwriters a 30-day option to purchase up to an additional 15 percent of the amount sold to cover over-allotments, if any. The offering is subject to market conditions, and there can be no assurance as to whether or when the offering may be completed, or as to the actual size or terms of the offering.

Infinity anticipates using the net proceeds from the offering for research and development expenditures (including costs associated with the continuing clinical development of its product candidates IPI-145 and retaspimycin HCl), as well as for working capital, capital expenditures, potential acquisitions of new businesses, technologies or products that the company believes have the potential to complement or expand its business, and other general corporate purposes.

The securities described above are being offered by Infinity pursuant to a shelf registration statement that was previously filed with, and declared effective by, the Securities and Exchange Commission (SEC). This press release does not constitute an offer to sell or a solicitation of an offer to buy the securities in this offering, nor shall there be any sale of these securities in any state or other jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such state or other jurisdiction. Preliminary and final prospectus supplements related to the offering will be filed with the SEC and will be available on the SEC's website located at www.sec.gov. Copies of the preliminary and final prospectus supplements relating to this offering, in each case with the accompanying prospectus, may be obtained, when available, from:

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 such as those relating to Infinity’s plans to consummate its proposed public offering and the intended use of proceeds therefrom. 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 related to whether or Infinity will be able to raise capital through the sale of shares of common stock, the final terms of the proposed offering, market and other conditions, the satisfaction of customary closing conditions related to the proposed public offering and the impact of general economic, industry or political conditions in the United States or internationally. There can be no assurance that Infinity will be able to complete the proposed public offering on the anticipated terms, or at all. You should not place undue reliance on these forward-looking statements, which apply only as of the date of this press release. Additional risks and uncertainties relating to the proposed offering, Infinity and its business can be found under the caption "Risk Factors" included in Infinity's preliminary prospectus supplement filed with the SEC on August 8, 2012, and Infinity’s quarterly report on Form 10-Q for the year 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.

Source: Infinity Pharmaceuticals, Inc.

Infinity Pharmaceuticals, Inc.
Jaren Irene Madden, 617-453-1336
Jaren.Madden@infi.com
http://www.infi.com
or
Media:
For Infinity Pharmaceuticals, Inc.
Dan Quinn, 617-761-6732
Dan.Quinn@fkhealth.com