Form4.ai tracks every SEC insider trade in real time. See every ALT insider filing with a free account — no card.
See every ALT insider filing — free account, no card.
Free accountAltimmune, Inc. (ALT) has 5 SEC Form 4 insider filings on record in the last 90 days. That includes 1 insider purchase totalling $44K. Most recent filing: Oct. 5, 2026.
Open-market value, last 90 days
Form 4 filings by type, last 90 days
| Date | Insider | Trade | Value | Price since buy |
|---|---|---|---|---|
| Oct 5, 2026 SEC filing | Arbet-Engels Christophe Chief Medical Officer | Vest & sell-to-cover | +24,821 sh | — |
| Oct 5, 2026 SEC filing | WEAVER GREGORY L Chief Financial Officer | Vest & sell-to-cover | +10,096 sh | — |
| Sep 17, 2026 SEC filing | Richardson Linda M Chief Commercial Officer | Vest & sell-to-cover | +17,174 sh | — |
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Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.