 Louisiana State Employees Retirement System increased its holdings in shares of Arrowhead Pharmaceuticals Inc NASDAQ:ARWR by 5.0 in the 2nd quarter, HoldingsChannel.com reports. The firm owned 25,400 shares of the biotechnology companys stock after acquiring an additional 1,200 shares during the period. Louisiana State Employees Retirement Systems holdings in Arrowhead Pharmaceuticals were worth 1,097,000 at ... 