ImmunoGen Announces Proposed Public Offering of Common Stock

ImmunoGen, Inc. IMGN announced today that it intends to offer shares if 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.