ALTIMMUNE INC (ALT) — insider trading
Health Care · NASDAQ
ALTIMMUNE INC (ALT) has 26 reported SEC Form 4 insider transactions in our data, including 5 open-market purchases among the most recent 26 (latest 2026-10-01).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-10-01 | Arbet-Engels Christophe | Officer (Chief Medical Officer) | Option exercise / conversion (derivative) | 37,500 | — | $0 | Form 4 |
| 2026-10-01 | Arbet-Engels Christophe | Officer (Chief Medical Officer) | Shares withheld for taxes / exercise cost | 12,679 | $2.76 | $35.0K | Form 4 |
| 2026-10-01 | Arbet-Engels Christophe | Officer (Chief Medical Officer) | Option exercise / conversion | 37,500 | — | $0 | Form 4 |
| 2026-10-01 | WEAVER GREGORY L | Officer (Chief Financial Officer) | Option exercise / conversion (derivative) | 14,475 | — | $0 | Form 4 |
| 2026-10-01 | WEAVER GREGORY L | Officer (Chief Financial Officer) | Shares withheld for taxes / exercise cost | 4,379 | $2.76 | $12.1K | Form 4 |
| 2026-10-01 | WEAVER GREGORY L | Officer (Chief Financial Officer) | Option exercise / conversion | 14,475 | — | $0 | Form 4 |
| 2026-10-01 | MENZIUSO RICHARD THOMAS | Officer (Principal Accounting Officer) | Grant / award / vesting (derivative) | 36,234 | — | $0 | Form 4 |
| 2026-10-01 | MENZIUSO RICHARD THOMAS | Officer (Principal Accounting Officer) | Grant / award / vesting (derivative) | 84,546 | — | $0 | Form 4 |
| 2026-09-16 | Richardson Linda M | Officer (Chief Commercial Officer) | Option exercise / conversion (derivative) | 24,000 | — | $0 | Form 4 |
| 2026-09-16 | Richardson Linda M | Officer (Chief Commercial Officer) | Shares withheld for taxes / exercise cost | 6,826 | $3.24 | $22.1K | Form 4 |
| 2026-09-16 | Richardson Linda M | Officer (Chief Commercial Officer) | Option exercise / conversion | 24,000 | — | $0 | Form 4 |
| 2026-08-13 | Durso Jerome Benedict | Director, Officer (President and CEO) | Open-market purchase | 15,000 | $2.95 | $44.3K | Form 4 |
| 2026-07-31 | Roberts M Scot | Officer (Chief Scientific Officer) | Grant / award / vesting | 875 | $2.41 | $2.1K | Form 4 |
| 2026-07-31 | WEAVER GREGORY L | Officer (Chief Financial Officer) | Grant / award / vesting | 1,753 | $2.41 | $4.2K | Form 4 |
| 2026-05-01 | SAYARE MITCHEL | Director | Grant / award / vesting (derivative) | 48,800 | — | $0 | Form 4 |
| 2026-05-01 | GILL JOHN | Director | Grant / award / vesting (derivative) | 48,800 | — | $0 | Form 4 |
| 2026-05-01 | Hodges Philip | Director | Grant / award / vesting (derivative) | 48,800 | — | $0 | Form 4 |
| 2026-05-01 | Pisano Wayne | Director | Grant / award / vesting (derivative) | 48,800 | — | $0 | Form 4 |
| 2026-05-01 | Schafer Klaus | Director | Grant / award / vesting (derivative) | 48,800 | — | $0 | Form 4 |
| 2026-05-01 | Jorkasky Diane | Director | Grant / award / vesting (derivative) | 48,800 | — | $0 | Form 4 |
| 2026-05-01 | Sohn Catherine A. | Director | Grant / award / vesting (derivative) | 48,800 | — | $0 | Form 4 |
| 2026-05-01 | Lawver Teri L | Director | Grant / award / vesting (derivative) | 48,800 | — | $0 | Form 4 |
| 2026-04-06 | GILL JOHN | Director | Open-market purchase | 9,200 | $3.41 | $31.3K | Form 4 |
| 2026-04-01 | Durso Jerome Benedict | Director, Officer (President and CEO) | Open-market purchase | 15,000 | $3.14 | $47.1K | Form 4 |
| 2026-04-01 | WEAVER GREGORY L | Officer (Chief Financial Officer) | Open-market purchase | 10,000 | $3.15 | $31.5K | Form 4 |
| 2026-03-06 | WEAVER GREGORY L | Officer (Chief Financial Officer) | Open-market purchase | 5,000 | $3.54 | $17.7K | Form 4 |
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Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: ALTIMMUNE INC (ALT).
Last updated 2026-10-01 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.