REGENXBIO Inc. (NASDAQ:RGNX) today announced that it intends to offer and sell, subject to market conditions, $100 million 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 the actual size or terms of the offering. In addition, REGENXBIO intends to grant the underwriters a 30-day option to purchase additional common shares in an amount of up to 15% of the number of common shares sold in connection with the offering.