Hennessy Advisors, Inc. (NASDAQ:HNNA - Get Free Report) Director Thomas Seavey sold 1,875 shares of the company's stock in a transaction dated Thursday, September 24th. The stock was sold at an average price of $10.15, for a total value of $19,031.25. Following the completion of the transaction, the director owned 59,754 shares in the company, valued at $606,503.10. This represents a 3.04% decrease in their ownership of the stock. The sale was d…