Short interest in Axcelis Technologies Inc (NASDAQ:ACLS) increased during the last reporting period, rising from 1.79M to 4.31M. This put 19.54% of the company's publicly available shares short.

Short interest for Axcelis Technologies gives investors a sense of the degree to which investors are betting on the decline of Axcelis Technologies's stock. Short interest data is updated every two weeks.

Based on the recent average volume of 576.18K shares traded per day, it would take 7.47 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.