Generac Holdings Inc. (NYSE:GNRC - Get Free Report) insider Norman Taffe sold 150 shares of the company's stock in a transaction that occurred on Thursday, September 17th. The stock was sold at an average price of $229.50, for a total transaction of $34,425.00. Following the completion of the transaction, the insider owned 11,276 shares in the company, valued at approximately $2,587,842. This represents a 1.31% decrease in their ownership of the…