Karyopharm Therapeutics (NASDAQ:KPTI) major shareholder Marcin Czernik sold 12,795 shares of the company’s stock in a transaction that occurred on Thursday, September 4th. The shares were sold at an average price of $38.07, for a total value of $487,105.65. The transaction was disclosed in a filing with the SEC, which can be accessed through this link. Major shareholders that own at least 10% of a company’s shares … Continue reading Top News: Karyopharm Therapeutics (NASDAQ:KPTI), Companhia Siderurgica Nacional (NYSE:SID), NCI Building Systems Inc. (NYSE:NCS), Auxilium Pharmaceuticals (NASDAQ:AUXL), Westbury Bancorp (NASDAQ:WBB)