Who owns Altimmune, Inc.?
Institutional ownership of ALT from SEC Form 13F filings across 153 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
153
13F holders
$364.1M
value, 2026 filers
61.9%
of shares outstanding (120.3M sh)
35
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of ALT's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 20.4M | $62.0M | 0.0% | 10.5% | +59.3% |
| 2 | Deep Track Capital, LPNEW | 19.3M | $58.5M | 0.9% | 9.9% | new |
| 3 | TCG Crossover Management, LLCNEW | 10.0M | $30.4M | 0.7% | 5.1% | new |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 8.2M | $24.9M | 0.0% | 4.2% | -27.7% |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 7.3M | $22.3M | 0.0% | 3.8% | +36.2% |
| 6 | MARSHALL WACE, LLP | 6.8M | $20.8M | 0.0% | 3.5% | +70.3% |
| 7 | VIKING GLOBAL INVESTORS LPNEW | 6.7M | $20.4M | 0.1% | 3.4% | new |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 5.0M | $15.2M | 0.0% | 2.6% | +61.3% |
| 9 | Woodline Partners LPNEW | 3.4M | $10.3M | 0.0% | 1.7% | new |
| 10 | MILLENNIUM MANAGEMENT LLC | 3.3M | $10.1M | 0.0% | 1.7% | +1.6% |
| 11 | Nuveen, LLC | 2.4M | $7.3M | 0.0% | 1.2% | +3.0% |
| 12 | TWO SIGMA INVESTMENTS, LP | 2.4M | $7.2M | 0.0% | 1.2% | -3.9% |
| 13 | GOLDMAN SACHS GROUP INC | 2.2M | $6.7M | 0.0% | 1.1% | +64.0% |
| 14 | GREAT POINT PARTNERS LLCNEW | 1.7M | $5.3M | 1.0% | 0.9% | new |
| 15 | NORTHERN TRUST CORP | 1.6M | $4.9M | 0.0% | 0.8% | +60.4% |
| 16 | Weiss Asset Management LPNEW | 1.5M | $4.7M | 0.0% | 0.8% | new |
| 17 | VANGUARD FIDUCIARY TRUST CO | 1.3M | $3.9M | 0.0% | 0.7% | +48.7% |
| 18 | CITADEL ADVISORS LLC | 983,559 | $3.0M | 0.0% | 0.5% | +119.1% |
| 19 | UBS Group AG | 866,385 | $2.6M | 0.0% | 0.4% | -4.2% |
| 20 | MORGAN STANLEY | 758,435 | $2.3M | 0.0% | 0.4% | -2.2% |
| 21 | BANK OF AMERICA CORP /DE/ | 757,919 | $2.3M | 0.0% | 0.4% | +32.9% |
| 22 | Ghisallo Capital Management LLCNEW | 750,000 | $2.3M | 0.0% | 0.4% | new |
| 23 | FMR LLC | 748,974 | $2.3M | 0.0% | 0.4% | +11.1% |
| 24 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 731,078 | $2.2M | 0.0% | 0.4% | -44.9% |
| 25 | Bank of New York Mellon Corp | 689,713 | $2.1M | 0.0% | 0.4% | +66.8% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.