ImmunoGen, Inc. Announces Proposed Public Offering of Common Stock

WALTHAM, Mass.--(BUSINESS WIRE)--ImmunoGen, Inc. (Nasdaq: IMGN), a biopharmaceutical company that develops targeted anticancer therapeutics, announced today that it intends to offer, subject to market and other conditions, 8,500,000 shares of its common stock in an underwritten public offering. ImmunoGen expects to grant the underwriters a thirty (30) day option to purchase up to 1,275,000 additional shares to cover over-allotments, if any.

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