ALT insider trading — Altimmune, Inc.
Over the last 90 days, insiders at Altimmune, Inc. (ALT) made 1 open-market purchase worth $44K and 0 open-market sales worth $0, making them net buyers by $44K. The largest purchase was by Durso Jerome Benedict (President and CEO), who bought 15,000 shares for $44K on Aug 13, 2026.
Updated Oct 16, 2026.
Recent ALT insider transactions
Every Form 4 filed by Altimmune, Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Oct 1, 2026 | Arbet-Engels Christophe | Chief Medical Officer | M · Option exercise | Direct | 37,500 | — | — | Form 4 |
| Oct 1, 2026 | Arbet-Engels Christophe | Chief Medical Officer | F · Tax withholding | Direct | 12,679 | $2.76 | $35K | Form 4 |
| Oct 1, 2026 | Weaver Gregory L | Chief Financial Officer | M · Option exercise | Direct | 14,475 | — | — | Form 4 |
| Oct 1, 2026 | Weaver Gregory L | Chief Financial Officer | F · Tax withholding | Direct | 4,379 | $2.76 | $12K | Form 4 |
| Sep 16, 2026 | Richardson Linda M | Chief Commercial Officer | M · Option exercise | Direct | 24,000 | — | — | Form 4 |
| Sep 16, 2026 | Richardson Linda M | Chief Commercial Officer | F · Tax withholding | Direct | 6,826 | $3.24 | $22K | Form 4 |
| Aug 13, 2026 | Durso Jerome Benedict | President and CEO | P · Purchase | Direct | 15,000 | $2.95 | $44K | Form 4 |
| Jul 31, 2026 | Weaver Gregory L | Chief Financial Officer | A · Grant/award | Direct | 1,753 | $2.41 | $4K | Form 4 |
| Jul 31, 2026 | Roberts M Scot | Chief Scientific Officer | A · Grant/award | Direct | 875 | $2.41 | $2K | Form 4 |
ALT insider trading FAQ
Are insiders buying ALT stock?
Yes. In the last 90 days, Altimmune, Inc. insiders made 1 open-market purchase totaling $44K, and no open-market sales. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading ALT?
Recent buyers: Durso Jerome Benedict.
Where does ALT insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.