As of the latest Form 4 filed Apr 6, 2026.
What Altimmune Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 33 most recent filings for ALT.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-04-06 | 2026-04-06 | GILL JOHN Director | PPurchase | +9.20K | $3.41 | $31.3K | No | Form 4 ↗ |
| 2026-04-01 | 2026-04-01 | Durso Jerome Benedict President and CEO | PPurchase | +15.0K | $3.14 | $47.1K | No | Form 4 ↗ |
| 2026-04-01 | 2026-04-01 | WEAVER GREGORY L Chief Financial Officer | PPurchase | +10.0K | $3.15 | $31.5K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-06 | Durso Jerome Benedict President and CEO | PPurchase | +20.0K | $3.54 | $70.8K | No | Form 4 ↗ |
| 2026-03-09 | 2026-03-06 | WEAVER GREGORY L Chief Financial Officer | PPurchase | +5.00K | $3.54 | $17.7K | No | Form 4 ↗ |
| 2026-02-03 | 2026-02-02 | Roberts M Scot Chief Scientific Officer | FTax | −2.33K | $5.55 | $12.9K | No | Form 4 ↗ |
| 2026-02-03 | 2026-02-02 | Roberts M Scot, Chief Scientific Officer | MExercise | +7.78K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-03 | 2026-01-31 | Roberts M Scot, Chief Scientific Officer | AAward | +5.57K | $3.07 | $17.1K | No | Form 4 ↗ |
| 2026-02-03 | 2026-01-30 | Roberts M Scot, Chief Scientific Officer | FTax | −2.86K | $5.60 | $16.0K | No | Form 4 ↗ |
| 2026-02-03 | 2026-01-30 | Roberts M Scot, Chief Scientific Officer | MExercise | +9.28K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-02 | 2026-01-31 | Jordt Raymond M Chief Business Officer | AAward | +4.57K | $3.07 | $14.0K | No | Form 4 ↗ |
| 2026-02-02 | 2026-01-31 | Garg Vipin K Director | AAward | +6.93K | $3.07 | $21.3K | No | Form 4 ↗ |
| 2026-02-02 | 2026-01-30 | Garg Vipin K, Director | FTax | −11.6K | $5.60 | $65.1K | No | Form 4 ↗ |
| 2026-02-02 | 2026-01-30 | Garg Vipin K, Director | MExercise | +26.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-29 | 2026-01-27 | Jordt Raymond M Chief Business Officer | FTax | −4.23K | $6.18 | $26.1K | No | Form 4 ↗ |
| 2026-01-29 | 2026-01-27 | Jordt Raymond M, Chief Business Officer | MExercise | +15.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-29 | 2026-01-27 | Roberts M Scot Chief Scientific Officer | FTax | −4.75K | $6.18 | $29.3K | No | Form 4 ↗ |
| 2026-01-29 | 2026-01-27 | Roberts M Scot, Chief Scientific Officer | MExercise | +15.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-29 | 2026-01-27 | Garg Vipin K Director | FTax | −17.9K | $6.18 | $111K | No | Form 4 ↗ |
| 2026-01-29 | 2026-01-27 | Garg Vipin K, Director | MExercise | +41.2K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-27 | 2026-01-25 | Jordt Raymond M Chief Business Officer | FTax | −3.85K | $5.50 | $21.2K | No | Form 4 ↗ |
| 2026-01-27 | 2026-01-25 | Jordt Raymond M, Chief Business Officer | MExercise | +14.6K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-27 | 2026-01-25 | Roberts M Scot Chief Scientific Officer | FTax | −4.37K | $5.50 | $24.1K | No | Form 4 ↗ |
| 2026-01-27 | 2026-01-25 | Roberts M Scot, Chief Scientific Officer | MExercise | +14.6K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-27 | 2026-01-25 | Garg Vipin K Director | FTax | −18.0K | $5.50 | $98.9K | No | Form 4 ↗ |
| 2026-01-27 | 2026-01-25 | Garg Vipin K, Director | MExercise | +42.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-09 | 2026-01-08 | Pisano Wayne Director | PPurchase | +5.00K | $4.08 | $20.4K | No | Form 4 ↗ |
| 2026-01-05 | 2026-01-05 | Sohn Catherine A. Director | PPurchase | +500.00 | $4.24 | $2.12K | No | Form 4 ↗ |
| 2026-01-05 | 2026-01-01 | Jordt Raymond M Chief Business Officer | FTax | −2.48K | $3.61 | $8.93K | No | Form 4 ↗ |
| 2026-01-05 | 2026-01-01 | Jordt Raymond M, Chief Business Officer | MExercise | +9.38K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2025-12-29 | 2025-12-29 | Jorkasky Diane Director | PPurchase | +527.00 | $3.80 | $2.00K | No | Form 4 ↗ |
| 2025-12-23 | 2025-12-23 | GILL JOHN Director | PPurchase | +12.5K | $4.10 | $51.2K | No | Form 4 ↗ |
| 2025-12-22 | 2025-12-22 | Durso Jerome Benedict Director | PPurchase | +12.5K | $4.13 | $51.6K | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also ALT’s full analysis or the market-wide insider trading feed. The tabs above jump to ALT’s other SEC data.
Source: SEC Form 4 filings for ALT, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.