Spark Therapeutics gene therapy hits goals in study By: CNBC.com News October 05, 2015 at 06:00 AM EDT Spark Therapeutics plans to file for U.S. regulatory approval next year for the first gene therapy product on the market in the U.S. Read More >> Related Stocks: Biogen Idec Biomarin Pharmaceuticals Bluebird Bio Spark Therap Uniqure Ord Shs