The current institutional shareholding score of Hennessy Advisors Inc is 3.00, ranking 70 out of 120 in the Investment Banking & Investment Services industry. The latest institutional shareholding proportion is 23.10%, representing a quarter-over-quarter increase of 18.81%. The largest institutional shareholder is James Simons, holding a total of 0.00 shares, representing 1.27% of shares outstanding, with 0.27% increase in holdings.