According to recent filings covering the 90 days ending December 12, 2025, the three most significant insider holders at Altimmune are President And CEO Vipin K Garg (355.08K shares), Chief Financial Officer Gregory L Weaver (23.08K shares), Acting Chief Financial Officer Andrew Shutterly (11.37K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Healthcare Capital Partners Iii, L.P. Venrock | 3,500,000 | 01 Mar, 2021 | |
| Vipin K Garg | President And CEO | 355,082 | 03 Feb, 2025 |
| David Drutz | 75,675 | 21 Nov, 2022 | |
| M Scot Roberts | Chief Scientific Officer | 74,066 | 04 Aug, 2025 |
| Richard I Eisenstadt | Chief Financial Officer | 45,012 | 01 Feb, 2024 |
| Raymond M Jordt | Chief Business Officer | 36,270 | 04 Aug, 2025 |
| Gregory L Weaver | Chief Financial Officer | 23,078 | 12 Nov, 2025 |
| William Michael Brown | Chief Financial Officer | 17,721 | 06 Aug, 2021 |
| Matthew Scott Harris | Chief Medical Officer | 16,087 | 04 Aug, 2025 |
| Andrew Shutterly | Acting Chief Financial Officer | 11,372 | 01 Aug, 2024 |
| Klaus Schafer | 9,179 | 22 Jun, 2022 | |
| Philip Hodges | 8,731 | 01 Mar, 2021 | |
| Wayne Pisano | 8,498 | 22 Dec, 2022 | |
| Catherine A. Sohn | 1,000 | 18 Mar, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 11 Nov, 2025 | Gregory L Weaver | Common Stock, par value $0.0001 | A | 18,750 | $0.00 | 28,750 | D | M |
| 11 Nov, 2025 | Gregory L Weaver | Common Stock, par value $0.0001 | D | 5,672 | $4.28 | 23,078 | D | F |
| 06 Jan, 2022 | John Gill | Common Stock, par value $0.0001 | D | 2,714 | $0.00 | 0 | D | G |
| 06 Jan, 2022 | John Gill | - | - | 0 | D | |||
| 31 Jul, 2025 | M Scot Roberts | Common Stock, par value $0.0001 | A | 846 | $3.14 | 74,066 | D | A |
| 31 Jul, 2025 | Raymond M Jordt | Common Stock, par value $0.0001 | A | 1,368 | $3.14 | 36,270 | D | A |
| 31 Jul, 2025 | Raymond M Jordt | - | - | 36,270 | D | |||
| 31 Jul, 2025 | Matthew Scott Harris | Common Stock, par value $0.0001 | A | 2,018 | $3.14 | 16,087 | D | A |
| 17 Mar, 2025 | Catherine A. Sohn | Common Stock, par value $0.0001 | A | 1,000 | $5.78 | 1,000 | D | P |
| 17 Mar, 2025 | Catherine A. Sohn | - | - | 1,000 | D | |||
| 13 Mar, 2025 | Gregory L Weaver | Common Stock, par value $0.0001 | A | 10,000 | $5.20 | 10,000 | D | P |
| 13 Mar, 2025 | Gregory L Weaver | - | - | 10,000 | D | |||
| 07 Mar, 2025 | Matthew Scott Harris | Common Stock, par value $0.0001 | D | 67,787 | $0.00 | 14,069 | D | G |
| 31 Jan, 2025 | Raymond M Jordt | Common Stock, par value $0.0001 | A | 2,614 | $5.18 | 34,902 | D | A |
| 30 Jan, 2025 | M Scot Roberts | Common Stock, par value $0.0001 | A | 9,275 | $0.00 | 62,921 | D | M |
| 30 Jan, 2025 | Vipin K Garg | - | - | 342,696 | D | |||
| 30 Jan, 2025 | Vipin K Garg | Common Stock, par value $0.0001 | A | 26,775 | $0.00 | 342,696 | D | M |
| 30 Jan, 2025 | Matthew Scott Harris | Common Stock, par value $0.0001 | A | 9,275 | $0.00 | 74,000 | D | M |
| 30 Jan, 2025 | Vipin K Garg | - | - | 330,995 | D | |||
| 30 Jan, 2025 | Vipin K Garg | Common Stock, par value $0.0001 | D | 11,701 | $7.00 | 330,995 | D | F |