Short interest in Exelixis Inc (NASDAQ:EXEL) increased during the last reporting period, rising from 27.26M to 28.31M. This put 15.1% of the company's publicly available shares short.

Based on the recent average volume of 2.16M shares traded per day, it would take 13.09 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.