Silverarc Capital Management LLC decreased its stake in shares of Prothena Co. plc (NASDAQ:PRTA – Free Report) by 46.4% in the 3rd quarter, Holdings Channel reports. The fund owned 26,629 shares of the biotechnology company’s stock after selling 23,092 shares during the quarter. Silverarc Capital Management LLC’s holdings in Prothena were worth $1,285,000 as of […]