The current institutional shareholding score of Arrowhead Pharmaceuticals Inc is 7.00, ranking 81 out of 389 in the Biotechnology & Medical Research industry. The latest institutional shareholding proportion is 79.34%, representing a quarter-over-quarter decrease of 10.25%. The largest institutional shareholder is James Simons, holding a total of 0.00 shares, representing 0.74% of shares outstanding, with 0.57% increase in holdings.