As of September 29, 2026, Altimmune's top three insider holders are Vipin K Garg (President And Ceo, 424.52K shares), M Scot Roberts (Chief Scientific Officer, 113.70K shares), Raymond M Jordt (Chief Business Officer, 70.11K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Vipin K Garg | President And Ceo | 424,519 | 0 | 424,519 | 47.1% | 02 Feb, 2026 |
| 2 | M Scot Roberts | Chief Scientific Officer | 113,699 | 0 | 113,699 | 12.6% | 03 Aug, 2026 |
| 3 | Raymond M Jordt | Chief Business Officer | 70,107 | 0 | 70,107 | 7.8% | 02 Feb, 2026 |
| 4 | Jerome Benedict Durso | President And Ceo | 62,500 | 0 | 62,500 | 6.9% | 13 Aug, 2026 |
| 5 | David Drutz | Director | 0 | 55,524 | 55,524 | 6.2% | 20 Aug, 2024 |
| 6 | Richard I Eisenstadt | Chief Financial Officer | 45,012 | 0 | 45,012 | 5.0% | 01 Feb, 2024 |
| 7 | Gregory L Weaver | Chief Financial Officer | 39,831 | 0 | 39,831 | 4.4% | 03 Aug, 2026 |
| 8 | John Gill | Director | 21,700 | 0 | 21,700 | 2.4% | 06 Apr, 2026 |
| 9 | Linda M Richardson | Chief Commercial Officer | 17,174 | 0 | 17,174 | 1.9% | 17 Sep, 2026 |
| 10 | Matthew Scott Harris | Chief Medical Officer | 16,087 | 0 | 16,087 | 1.8% | 04 Aug, 2025 |
| 11 | Wayne Pisano | Director | 13,498 | 0 | 13,498 | 1.5% | 09 Jan, 2026 |
| 12 | Andrew Shutterly | Acting Chief Financial Officer | 11,372 | 0 | 11,372 | 1.3% | 01 Aug, 2024 |
| 13 | Klaus Schafer | Director | 9,179 | 0 | 9,179 | 1.0% | 22 Jun, 2022 |
| 14 | Catherine A. Sohn | Director | 1,500 | 0 | 1,500 | 0.2% | 05 Jan, 2026 |
| 15 | Diane Jorkasky | Director | 527 | 0 | 527 | 0.1% | 29 Dec, 2025 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 16 Sep, 2026 | Linda M Richardson | Chief Commercial Officer | Acquired M | 24,000 | $0.00 | $0 | 24,000 | Direct |
| 16 Sep, 2026 | Linda M Richardson | Chief Commercial Officer | Disposed F | 6,826 | $3.24 | $22.12K | 17,174 | Direct |
| 16 Sep, 2026 | Linda M Richardson | Chief Commercial Officer | Disposed M | 24,000 | $0.00 | $0 | 72,000 | Direct |
| 13 Aug, 2026 | Jerome Benedict Durso | President And Ceo | Acquired P | 15,000 | $2.95 | $44.25K | 62,500 | Direct |
| 31 Jul, 2026 | Gregory L Weaver | Chief Financial Officer | Acquired A | 1,753 | $2.41 | $4.23K | 39,831 | Direct |
| 31 Jul, 2026 | M Scot Roberts | Chief Scientific Officer | Acquired A | 875 | $2.41 | $2.11K | 113,699 | Direct |
| 01 May, 2026 | Klaus Schafer | Director | Acquired A | 48,800 | $0.00 | $0 | 48,800 | Direct |
| 01 May, 2026 | Teri L Lawver | Director | Acquired A | 48,800 | $0.00 | $0 | 48,800 | Direct |
| 01 May, 2026 | Mitchel Sayare | Director | Acquired A | 48,800 | $0.00 | $0 | 48,800 | Direct |
| 01 May, 2026 | Wayne Pisano | Director | Acquired A | 48,800 | $0.00 | $0 | 48,800 | Direct |
| 01 May, 2026 | Philip Hodges | Director | Acquired A | 48,800 | $0.00 | $0 | 48,800 | Direct |
| 01 May, 2026 | Catherine A. Sohn | Director | Acquired A | 48,800 | $0.00 | $0 | 48,800 | Direct |
| 01 May, 2026 | John Gill | Director | Acquired A | 48,800 | $0.00 | $0 | 48,800 | Direct |
| 01 May, 2026 | Diane Jorkasky | Director | Acquired A | 48,800 | $0.00 | $0 | 48,800 | Direct |
| 06 Apr, 2026 | John Gill | Director | Acquired P | 9,200 | $3.41 | $31.35K | 21,700 | Direct |
| 01 Apr, 2026 | Jerome Benedict Durso | President And Ceo | Acquired P | 15,000 | $3.14 | $47.10K | 47,500 | Direct |
| 01 Apr, 2026 | Gregory L Weaver | Chief Financial Officer | Acquired P | 10,000 | $3.15 | $31.50K | 38,078 | Direct |
| 06 Mar, 2026 | Gregory L Weaver | Chief Financial Officer | Acquired P | 5,000 | $3.54 | $17.70K | 28,078 | Direct |
| 06 Mar, 2026 | Jerome Benedict Durso | President And Ceo | Acquired P | 20,000 | $3.54 | $70.79K | 32,500 | Direct |
| 26 Feb, 2026 | Gregory L Weaver | Chief Financial Officer | Acquired A | 259,000 | $0.00 | $0 | 259,000 | Direct |