Investors & Media

ImmunoGen, Inc. Announces Proposed Public Offering of Common Stock

May 19, 2011 at 12:00 AM EDT
ImmunoGen, Inc. Announces Proposed Public Offering of Common Stock

WALTHAM, Mass., May 19, 2011 (BUSINESS WIRE) -- ImmunoGen, Inc. (Nasdaq: IMGN) announced today that it intends to offer shares of its common stock in an underwritten public offering. The offering is subject to market and other 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.

Jefferies & Company, Inc. is acting as the sole book-running manager for the proposed offering and Oppenheimer & Co. Inc., RBC Capital Markets, LLC, William Blair & Company, LLC, Canaccord Genuity Inc. and Morgan Joseph TriArtisan LLC are acting as co-managers.

The securities described above are being offered by ImmunoGen pursuant to an automatically effective shelf registration statement that was previously filed with 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. A preliminary prospectus supplement 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 prospectus supplement and the accompanying prospectus relating to this offering may be obtained, when available, from Equity Syndicate Prospectus Department, Jefferies & Company, Inc., 520 Madison Avenue, 12th Floor, New York, NY, 10022, by telephone at 877-547-6340, or by email at Prospectus_Department@Jefferies.com.

About ImmunoGen, Inc.

ImmunoGen, Inc. develops targeted anticancer therapeutics using the Company's expertise in tumor biology, monoclonal antibodies, potent cancer-cell killing agents and engineered linkers. The Company's Targeted Antibody Payload (TAP) technology uses monoclonal antibodies to deliver one of ImmunoGen's proprietary cancer-cell killing agents specifically to tumor cells. There are currently six TAP compounds in the clinic. ImmunoGen's collaborative partners include Amgen, Bayer HealthCare Pharmaceuticals, Biotest, Genentech (a member of the Roche Group), Novartis and Sanofi. The most advanced compound using ImmunoGen's TAP technology, trastuzumab emtansine (T-DM1), is in Phase III testing through the Company's collaboration with Genentech.

This press release includes forward-looking statements, including statements related to the proposed public offering of securities by ImmunoGen. For these statements, ImmunoGen claims the protection of the safe harbor for forward-looking statements provided by the Private Securities Litigation Reform Act of 1995. It should be noted that there are risks and uncertainties related to the public offering. A review of these risks can be found in ImmunoGen's Annual Report on Form 10-K for the fiscal year ended June 30, 2010 and other reports filed with the Securities and Exchange Commission.ImmunoGen undertakes no obligation to revise or update any forward-looking statement to reflect events or circumstances after the issuance of this press release.

SOURCE: ImmunoGen, Inc.

INVESTOR CONTACT
ImmunoGen, Inc.
Carol Hausner, 781-895-0600
Executive Director, Investor Relations and Corporate Communications
info@immunogen.com