CAMBRIDGE, Mass.--(BUSINESS WIRE)--Acceleron Pharma Inc. (Nasdaq: XLRN), a leading biopharmaceutical company in the discovery, development and commercialization of TGF-beta superfamily therapeutics to treat serious and rare diseases, today announced that it intends to offer and sell, subject to market and other conditions, $400 million of its common stock in an underwritten public offering. As part of this offering, Acceleron intends to grant the underwriters a 30-day option to purchase up to an additional fifteen percent (15%) of the shares of common stock offered in the public offering. All of the shares in the proposed offering are to be sold by Acceleron.

J.P. Morgan, SVB Leerink and Cowen are acting as joint book-running managers for the offering. Barclays, Credit Suisse, and Piper Sandler & Co. are also acting as joint book-running managers.

About Acceleron

Acceleron is a biopharmaceutical company dedicated to the discovery, development, and commercialization of therapeutics to treat serious and rare diseases. Acceleron’s leadership in the understanding of TGF-beta superfamily biology and protein engineering generates innovative compounds that engage the body's ability to regulate cellular growth and repair.