ALT
Altimmune, Inc.
NASDAQ · Healthcare · Biotechnology · US
$3.25
+0.31%1
Insider buys (3m)
0
Insider sells (3m)
$44.3K
Net value (3m)
+9.4%
Price return (3m)
Form 4 filings
| Date | Insider | Activity | Shares | Price |
|---|---|---|---|---|
| Sep 17, 2026 | Richardson Linda M · officer: Chief Commercial Officer | F-InKind | 6,826 | $3.24 |
| Sep 17, 2026 | Richardson Linda M · officer: Chief Commercial Officer | M-Exempt | 24,000 | $0.00 |
| Aug 13, 2026 | Durso Jerome Benedict · director, officer: President and CEO | Purchase | 15,000 | $2.95 |
| Aug 3, 2026 | Roberts M Scot · officer: Chief Scientific Officer | A-Award | 875 | $2.41 |
| Aug 3, 2026 | WEAVER GREGORY L · officer: Chief Financial Officer | A-Award | 1,753 | $2.41 |
| May 1, 2026 | Lawver Teri L · director | A-Award | 48,800 | $2.82 |
| May 1, 2026 | Pisano Wayne · director | A-Award | 48,800 | $2.82 |
| May 1, 2026 | GILL JOHN · director | A-Award | 48,800 | $2.82 |
| May 1, 2026 | Jorkasky Diane · director | A-Award | 48,800 | $2.82 |
| May 1, 2026 | SAYARE MITCHEL · director | A-Award | 48,800 | $2.82 |
| May 1, 2026 | Hodges Philip · director | A-Award | 48,800 | $2.82 |
| May 1, 2026 | Sohn Catherine A. · director | A-Award | 48,800 | $2.82 |
| May 1, 2026 | Schafer Klaus · director | A-Award | 48,800 | $2.82 |
| Apr 6, 2026 | GILL JOHN · director | Purchase | 9,200 | $3.41 |
| Mar 9, 2026 | Durso Jerome Benedict · director, officer: President and CEO | Purchase | 20,000 | $3.54 |
| Mar 9, 2026 | WEAVER GREGORY L · officer: Chief Financial Officer | Purchase | 5,000 | $3.54 |
| Feb 27, 2026 | WEAVER GREGORY L · officer: Chief Financial Officer | A-Award | 111,000 | $0.00 |
| Feb 27, 2026 | WEAVER GREGORY L · officer: Chief Financial Officer | A-Award | 259,000 | $4.46 |
| Feb 27, 2026 | Roberts M Scot · officer: Chief Scientific Officer | A-Award | 95,430 | $0.00 |
| Feb 27, 2026 | Roberts M Scot · officer: Chief Scientific Officer | A-Award | 222,670 | $4.46 |
| Feb 3, 2026 | Roberts M Scot · officer: Chief Scientific Officer | M-Exempt | 7,775 | $0.00 |
| Feb 3, 2026 | Roberts M Scot · officer: Chief Scientific Officer | A-Award | 5,567 | $3.07 |
| Feb 3, 2026 | Roberts M Scot · officer: Chief Scientific Officer | F-InKind | 2,859 | $5.60 |
| Feb 3, 2026 | Roberts M Scot · officer: Chief Scientific Officer | F-InKind | 2,329 | $5.55 |
| Feb 3, 2026 | Roberts M Scot · officer: Chief Scientific Officer | M-Exempt | 9,275 | $0.00 |
| Feb 2, 2026 | Garg Vipin K · director | A-Award | 6,926 | $3.07 |
| Feb 2, 2026 | Garg Vipin K · director | F-InKind | 11,632 | $5.60 |
| Feb 2, 2026 | Garg Vipin K · director | M-Exempt | 26,775 | $0.00 |
| Feb 2, 2026 | Jordt Raymond M · officer: Chief Business Officer | A-Award | 4,571 | $3.07 |
| Jan 29, 2026 | Roberts M Scot · officer: Chief Scientific Officer | F-InKind | 4,748 | $6.18 |
Institutional positioning
13F filings over the trailing two quarters
New 89Increased 164Reduced 75Sold out 18
| Filer | Action | Shares | Filed |
|---|---|---|---|
| BlackRock, Inc. | Increased | 20,385,284 | Aug 7, 2026 |
| Deep Track Capital, LP | New Position | 19,250,000 | Aug 14, 2026 |
| BLACKROCK, INC. | Increased | 12,795,277 | May 13, 2026 |
| STATE STREET CORP | Increased | 12,098,540 | Aug 7, 2026 |
| TCG Crossover Management, LLC | New Position | 10,000,000 | Aug 14, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 8,177,752 | Aug 13, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 7,330,265 | Aug 13, 2026 |
| STATE STREET CORP | Increased | 7,145,550 | May 15, 2026 |
| MARSHALL WACE, LLP | Increased | 6,841,055 | Aug 13, 2026 |
| VIKING GLOBAL INVESTORS LP | New Position | 6,700,000 | Aug 14, 2026 |
| RA CAPITAL MANAGEMENT, L.P. | New Position | 6,500,000 | Aug 14, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 5,658,049 | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 5,382,002 | May 8, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 5,011,314 | Aug 12, 2026 |
| MARSHALL WACE, LLP | Increased | 4,017,901 | May 15, 2026 |
Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Sep 17, 2026