Who owns Altimmune, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of ALT from SEC Form 13F filings across 210 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.
As of the 2026-06-30 reporting period, 210 institutions disclosed 150.0M shares of Altimmune, Inc. worth $456.1M — about 80.9% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
210
13F holders
$456.1M
value, 2026 filers
80.9%
of shares outstanding (150.0M sh)
60
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% | 11% | +59.3% |
| 2 | Deep Track Capital, LPNEW | 19.3M | $58.5M | 0.9% | 10.4% | new |
| 3 | STATE STREET CORP | 12.1M | $36.8M | 0.0% | 6.5% | +69.3% |
| 4 | TCG Crossover Management, LLCNEW | 10.0M | $30.4M | 0.7% | 5.4% | new |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 8.2M | $24.9M | 0.0% | 4.4% | +44.5% |
| 6 | VANGUARD PORTFOLIO MANAGEMENT LLC | 7.3M | $22.3M | 0.0% | 4% | +36.2% |
| 7 | MARSHALL WACE, LLP | 6.8M | $20.8M | 0.0% | 3.7% | +70.3% |
| 8 | VIKING GLOBAL INVESTORS LPNEW | 6.7M | $20.4M | 0.1% | 3.6% | new |
| 9 | RA CAPITAL MANAGEMENT, L.P.NEW | 6.5M | $19.8M | 0.2% | 3.5% | new |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 5.0M | $15.2M | 0.0% | 2.7% | +61.3% |
| 11 | Woodline Partners LPNEW | 3.4M | $10.3M | 0.0% | 1.8% | new |
| 12 | MILLENNIUM MANAGEMENT LLC | 3.3M | $10.1M | 0.0% | 1.8% | +1.6% |
| 13 | Trails Edge Capital Partners, LPNEW | 2.7M | $8.1M | 1.3% | 1.4% | new |
| 14 | Nuveen, LLC | 2.4M | $7.3M | 0.0% | 1.3% | +3.0% |
| 15 | TWO SIGMA INVESTMENTS, LP | 2.4M | $7.2M | 0.0% | 1.3% | -3.9% |
| 16 | GOLDMAN SACHS GROUP INC | 2.2M | $6.7M | 0.0% | 1.2% | +64.0% |
| 17 | GREAT POINT PARTNERS LLCNEW | 1.7M | $5.3M | 1.0% | 0.9% | new |
| 18 | NORTHERN TRUST CORP | 1.6M | $4.9M | 0.0% | 0.9% | +60.4% |
| 19 | Weiss Asset Management LPNEW | 1.5M | $4.7M | 0.0% | 0.8% | new |
| 20 | Nantahala Capital Management, LLCNEW | 1.5M | $4.6M | 0.2% | 0.8% | new |
| 21 | VANGUARD FIDUCIARY TRUST CO | 1.3M | $3.9M | 0.0% | 0.7% | +48.7% |
| 22 | Cormorant Asset Management, LPNEW | 1.3M | $3.8M | 0.2% | 0.7% | new |
| 23 | AQR CAPITAL MANAGEMENT LLC | 1.2M | $3.7M | 0.0% | 0.7% | +1328.8% |
| 24 | CITADEL ADVISORS LLC | 983,559 | $3.0M | 0.0% | 0.5% | +119.1% |
| 25 | UBS Group AG | 866,385 | $2.6M | 0.0% | 0.5% | -4.2% |
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.