The current institutional shareholding score of Altimmune Inc is 3.00, ranking 193 out of 389 in the Biotechnology & Medical Research industry. The latest institutional shareholding proportion is 30.53%, representing a quarter-over-quarter decrease of 32.53%. The largest institutional shareholder is Steven Cohen, holding a total of 687.92K shares, representing 0.51% of shares outstanding, with 49.08% increase in holdings.