Plug Power, Inc. (NASDAQ:PLUG - Get Free Report) insider Benjamin Haycraft sold 18,750 shares of the firm's stock in a transaction that occurred on Tuesday, September 15th. The stock was sold at an average price of $2.06, for a total value of $38,625.00. Following the completion of the sale, the insider directly owned 301,249 shares in the company, valued at approximately $620,572.94. This trade represents a 5.86% decrease in their position. The…