Insulet Corporation (NASDAQ:PODD - Get Free Report) was the target of a large growth in short interest in March. As of March 31st, there was short interest totaling 3,049,595 shares, a growth of 19.3% from the March 15th total of 2,555,922 shares. Based on an average daily volume of 865,626 shares, the days-to-cover ratio is currently 3.5 days. Currently, 4.4% of the company's shares are sold short.