Spark Therapeutics Prices 3M Share Offering @$47.00/Share By: Benzinga via Benzinga December 15, 2015 at 19:14 PM EST Spark Therapeutics, Inc. ("Spark") (NASDAQ: ONCE) announced today the pricing of an underwritten public offering of 3,000,000 shares of ... Read More >> Related Stocks: Macy's Spark Therap