Russell Investments Group Ltd. grew its stake in Amphastar Pharmaceuticals, Inc. (NASDAQ:AMPH – Free Report) by 1.3% during the 2nd quarter, according to its most recent 13F filing with the Securities and Exchange Commission (SEC). The fund owned 36,704 shares of the company’s stock after purchasing an additional 488 shares during the period. Russell Investments […]
Amphastar Pharmaceuticals, Inc. (NASDAQ:AMPH – Get Free Report) was the target of a significant increase in short interest in November. As of November 15th, there was short interest totalling 2,890,000 shares, an increase of 15.6% from the October 31st total of 2,500,000 shares. Currently, 8.1% of the shares of the stock are sold short. Based […]