 Assenagon Asset Management S.A. bought a new stake in John B. Sanfilippo Son, Inc. NASDAQ:JBSS in the first quarter, according to the company in its most recent filing with the Securities Exchange Commission. The firm bought 16,283 shares of the companys stock, valued at approximately 1,456,000. Assenagon Asset Management S.A. owned approximately 0.14 ... 