Aspen Aerogels, Inc. (NYSE:ASPN – Get Free Report) was the target of a large growth in short interest in the month of September. As of September 30th, there was short interest totalling 5,860,000 shares, a growth of 7.5% from the September 15th total of 5,450,000 shares. Based on an average daily volume of 810,800 shares, […]