Rigel Announces Proposed Public Offering of Common Stock

Rigel Pharmaceuticals RIGL, today announced that it intends to offer and sell shares of its common stock in an underwritten public offering. All of the shares in the offering are to be sold by Rigel. 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. and J.P. Morgan Securities LLC are acting as joint book-running managers for the proposed offering, with Piper Jaffray & Co. acting as co-manager.