Altimmune, Inc. (ALT) Insider Trading
Over the last 3 months, ALT insiders made 1 open-market buy and 0 sales, a net purchase of $31K (SEC Form 4). Over the last 6 months, 163 institutions increased and 71 reduced their position (13F).
Insider Activity
Sentiment
100/100
Buys (3m)
1
Sells (3m)
0
Net (3m)
$31.3K
Insiders buying
Insider trades by month Buys Sells
Aug
Mar
Dec
Jan
Mar
Apr
Context3-month price -1.3%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| May 1, 2026 | GILL JOHNdirector | Grant | 48,800 | $2.82 |
| May 1, 2026 | Pisano Waynedirector | Grant | 48,800 | $2.82 |
| May 1, 2026 | Jorkasky Dianedirector | Grant | 48,800 | $2.82 |
| May 1, 2026 | Hodges Philipdirector | Grant | 48,800 | $2.82 |
| May 1, 2026 | Lawver Teri Ldirector | Grant | 48,800 | $2.82 |
| May 1, 2026 | Sohn Catherine A.director | Grant | 48,800 | $2.82 |
| May 1, 2026 | Schafer Klausdirector | Grant | 48,800 | $2.82 |
| May 1, 2026 | SAYARE MITCHELdirector | Grant | 48,800 | $2.82 |
| Apr 6, 2026 | GILL JOHNdirector | Buy | 9,200 | $3.41 |
| Mar 9, 2026 | Durso Jerome Benedictdirector, officer: President and CEO | Buy | 20,000 | $3.54 |
| Mar 9, 2026 | WEAVER GREGORY Lofficer: Chief Financial Officer | Buy | 5,000 | $3.54 |
| Feb 27, 2026 | Roberts M Scotofficer: Chief Scientific Officer | Grant | 95,430 | — |
| Feb 27, 2026 | WEAVER GREGORY Lofficer: Chief Financial Officer | Grant | 111,000 | — |
| Feb 27, 2026 | Roberts M Scotofficer: Chief Scientific Officer | Grant | 222,670 | $4.46 |
| Feb 27, 2026 | WEAVER GREGORY Lofficer: Chief Financial Officer | Grant | 259,000 | $4.46 |
| Feb 3, 2026 | Roberts M Scotofficer: Chief Scientific Officer | Option | 7,775 | — |
| Feb 3, 2026 | Roberts M Scotofficer: Chief Scientific Officer | Grant | 5,567 | $3.07 |
| Feb 3, 2026 | Roberts M Scotofficer: Chief Scientific Officer | Tax | 2,859 | $5.60 |
| Feb 3, 2026 | Roberts M Scotofficer: Chief Scientific Officer | Tax | 2,329 | $5.55 |
| Feb 3, 2026 | Roberts M Scotofficer: Chief Scientific Officer | Option | 9,275 | — |
| Feb 2, 2026 | Garg Vipin Kdirector | Grant | 6,926 | $3.07 |
| Feb 2, 2026 | Garg Vipin Kdirector | Tax | 11,632 | $5.60 |
| Feb 2, 2026 | Garg Vipin Kdirector | Option | 26,775 | — |
| Feb 2, 2026 | Jordt Raymond Mofficer: Chief Business Officer | Grant | 4,571 | $3.07 |
| Jan 29, 2026 | Roberts M Scotofficer: Chief Scientific Officer | Tax | 4,748 | $6.18 |
| Jan 29, 2026 | Roberts M Scotofficer: Chief Scientific Officer | Option | 15,850 | — |
| Jan 29, 2026 | Garg Vipin Kdirector | Tax | 17,898 | $6.18 |
| Jan 29, 2026 | Garg Vipin Kdirector | Option | 41,200 | — |
| Jan 29, 2026 | Jordt Raymond Mofficer: Chief Business Officer | Option | 15,850 | — |
| Jan 29, 2026 | Jordt Raymond Mofficer: Chief Business Officer | Tax | 4,229 | $6.18 |
Source: ALT SEC Form 4 filings, latest May 1, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their ALT positions over the last 6 months (SEC Form 13F).
Increased
163
New positions
69
Reduced
71
Sold out
62
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BLACKROCK, INC. | Increased | 12.8M | May 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 11.3M | May 15, 2026 |
| BLACKROCK, INC. | Increased | 9.7M | Feb 12, 2026 |
| VANGUARD GROUP INC | Increased | 9.5M | Jan 29, 2026 |
| STATE STREET CORP | Increased | 7.1M | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 5.4M | May 8, 2026 |
| STATE STREET CORP | Increased | 5.1M | Feb 13, 2026 |
| MARSHALL WACE, LLP | Increased | 4.0M | May 15, 2026 |
| MILLENNIUM MANAGEMENT LLC | Increased | 3.3M | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 3.1M | May 15, 2026 |
| ALYESKA INVESTMENT GROUP, L.P. | New Position | 2.6M | May 15, 2026 |
| TWO SIGMA INVESTMENTS, LP | Increased | 2.5M | May 15, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 2.4M | May 15, 2026 |
| NUVEEN, LLC | Increased | 2.3M | Apr 30, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 2.3M | Feb 9, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.