Spark Therapeutics Prices 3M Share Offering @$47.00/Share

Spark Therapeutics, Inc. ("Spark") (NASDAQ: ONCE) announced today the pricing of an underwritten public offering of 3,000,000 shares of its common stock at a public offering price of $47.00 per share, before underwriting discounts. The offering consists of 2,000,000 shares being sold by Spark and 1,000,000 shares being sold by The Children's Hospital of Philadelphia Foundation ("CHOP"), resulting in aggregate net proceeds of approximately $88.4 million to Spark and approximately $44.2 million to CHOP, after deducting underwriting discounts and before offering expenses. In addition, Spark and CHOP have granted the underwriters of the offering an option for a period of 30 days to purchase up to an additional 450,000 shares at the public offering price, less the underwriting discount. Spark will not receive any proceeds from the sale of shares by CHOP. The offering is expected to close on or about December 21, 2015, subject to satisfaction of customary closing conditions. A registration statement relating to these securities was declared effective by the Securities and Exchange Commission on December 15, 2015. J.P. Morgan Securities LLC, Cowen and Company, LLC and Evercore Group L.L.C. will act as bookrunning managers See full press release