🕵️ Altimmune, Inc. ($ALT)
SEC insider & ownership activity, last 12 months · CIK 1326190 · every row links its SEC filing
Over the last 12 months insiders bought $326K with no open-market selling against it. Durso Jerome Benedict bought $169K in discretionary trades (Dec–Apr). Blackrock, Inc. trimmed 8.7% → 7.6%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
6 buyers, $326K (10 lots) · 0 sellers, $0 (0 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Durso Jerome Benedict | 3 | $169K | 0 | – | Apr 1, 2026 |
| Gill John | 2 | $83K | 0 | – | Apr 6, 2026 |
| Gregory L. Weaver | 2 | $49K | 0 | – | Apr 1, 2026 |
| Pisano Wayne | 1 | $20K | 0 | – | Jan 8, 2026 |
| Catherine Sohn | 1 | $2K | 0 | – | Jan 5, 2026 |
| Jorkasky Diane | 1 | $2K | 0 | – | Dec 29, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| DEEP Track Capital, LP | 10.0% | 13G | Apr 30, 2026 | filing ↗ | |
| David Kroin | 10.0% | 13G | Apr 30, 2026 | filing ↗ | |
| Chen Yu | 9.8% | 13G | May 1, 2026 | filing ↗ | |
| DEEP Track Biotechnology Master Fund, Ltd. | 8.7% | 13G | Apr 30, 2026 | filing ↗ | |
| Blackrock, Inc. | 7.6% | 13G | Jul 16, 2025 | filing ↗ | |
| Viking Global Investors LP | 6.7% | 13G | May 1, 2026 | filing ↗ | |
| Viking Global Opportunities Parent GP LLC | 6.7% | 13G | May 1, 2026 | filing ↗ | |
| Halvorsen Ole Andreas | 6.7% | 13G | May 1, 2026 | filing ↗ | |
| Shabet Rose Sharon | 6.7% | 13G | May 1, 2026 | filing ↗ | |
| RA Capital Management, L.P. | 6.5% | 13G | May 1, 2026 | filing ↗ | |
| Peter Kolchinsky | 6.5% | 13G | May 1, 2026 | filing ↗ | |
| Rajeev Shah | 6.5% | 13G | May 1, 2026 | filing ↗ | |
| RA Capital Healthcare Fund, L.P. | 6.5% | 13G | May 1, 2026 | filing ↗ | |
| State Street Corporation | 5.5% | 13G | May 12, 2026 | filing ↗ | |
| TCG Crossover GP II, LLC | 5.0% | 13G | May 1, 2026 | filing ↗ | |
| TCG Crossover Fund II, L.P. | 5.0% | 13G | May 1, 2026 | filing ↗ | |
| TCG Crossover GP III, LLC | 5.0% | 13G | May 1, 2026 | filing ↗ | |
| TCG Crossover Fund III, L.P. | 5.0% | 13G | May 1, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Reg FD disclosure (7.01) | Jul 28, 2026 | filing ↗ |
| Other events (8.01) | Jul 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 28, 2026 | filing ↗ |
| Other events (8.01) | Jun 16, 2026 | filing ↗ |
| Earnings (2.02) | May 13, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 13, 2026 | filing ↗ |
| Material agreement (1.01) | Apr 22, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 22, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Apr 16, 2026 | filing ↗ |
| Shareholder vote (5.07) | Apr 16, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 16, 2026 | filing ↗ |
| Earnings (2.02) | Mar 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 5, 2026 | filing ↗ |
| Other events (8.01) | Feb 2, 2026 | filing ↗ |
| Material agreement (1.01) | Jan 27, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 27, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 19, 2025 | filing ↗ |
| Other events (8.01) | Dec 19, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 19, 2025 | filing ↗ |
| Officer/director changes (5.02) | Nov 30, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 30, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 30, 2025 | filing ↗ |
| Material agreement (1.01) | Nov 6, 2025 | filing ↗ |
| Agreement terminated (1.02) | Nov 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 6, 2025 | filing ↗ |
| Material agreement (1.01) | Nov 6, 2025 | filing ↗ |
| Earnings (2.02) | Nov 6, 2025 | filing ↗ |
| New financial obligation (2.03) | Nov 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 6, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 1, 2025 | filing ↗ |