Altimmune, Inc. (ALT) Institutional Ownership & Insider Trading
210 institutions reported holding Altimmune, Inc. shares in 13F filings for the quarter ended 2026-06-30, according to EquiReason's reading of their SEC filings. 11 insider trades on Form 4 since 2025-10-01.
Source: SEC EDGAR filings · figures as of 2026-06-30 · read by EquiReason
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- Market cap
- 412.4M
- P/E TTM
- —
- Dividend yield
- —
- 52-week
- —
- Next earnings
- 10 Nov, in 17 days
Institutions · all 13F filers
quarter to 30 Jun 2026 · filers in both quarters210 institutions held 77.9% of the shares. Across filers that reported both quarters, shares held changed +118.7%.
Largest moves, shares (millions)
Institutional flow by quarter
net shares added or trimmed, millions · filers in both quarters| Quarter | Holders | Shares held, M | Change | Increased | New | Decreased | Closed |
|---|---|---|---|---|---|---|---|
| Jun 26 | 210 | 152 | +118.7% | 85 | 54 | 31 | 14 |
| Mar 26 | 171 | 69 | +28.4% | 78 | 24 | 34 | 31 |
| Dec 25 | 181 | 55 | +33.8% | 70 | 42 | 22 | 20 |
| Sep 25 | 155 | 42 | +10.7% | 53 | 19 | 46 | 37 |
| Jun 25 | 179 | 37 | -1.7% | 67 | 33 | 39 | 29 |
| Mar 25 | 172 | 38 | -6.1% | 53 | 22 | 48 | 25 |
| Dec 24 | 180 | 40 | +2.3% | 61 | 26 | 39 | 18 |
| Sep 24 | 166 | 39 | -11.0% | 53 | 19 | 41 | 23 |
Altimmune, Inc. — questions
- Who owns Altimmune, Inc. stock?
- 210 institutions reported Altimmune, Inc. shares in 13F filings for the quarter ended 2026-06-30. The largest: BlackRock, Inc. (10.5%), Deep Track Capital, LP (9.9%), STATE STREET CORP (6.2%).
- Are Altimmune, Inc. insiders buying or selling?
- 11 insider trades on Form 4 since 2025-10-01; the full list, with dates, people and plan status, is on this page.
Every figure on this page comes from Altimmune, Inc.'s own SEC filings — see them on SEC EDGAR. Price data is licensed and shown only inside the product.
How these figures are read: methodology · EquiReason.