Assenagon Asset Management S.A. raised its stake in DexCom, Inc. (NASDAQ:DXCM – Free Report) by 1,127.3% in the 3rd quarter, according to its most recent 13F filing with the Securities and Exchange Commission (SEC). The institutional investor owned 385,295 shares of the medical device company’s stock after acquiring an additional 353,901 shares during the period. […]