As of September 29, 2026, the three largest insider holders of SIGA are Daniel J Luckshire (Executive Vp Cfo, 280.49K shares), Joseph W Iii Marshall (Director, 246.52K shares), Dennis E Hruby (Evp Chief Scientific Officer, 198.54K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Daniel J Luckshire | Executive Vp Cfo | 280,493 | 0 | 280,493 | 17.9% | 17 Mar, 2026 |
| 2 | Joseph W Iii Marshall | Director | 246,523 | 0 | 246,523 | 15.7% | 10 Jun, 2026 |
| 3 | Dennis E Hruby | Evp Chief Scientific Officer | 198,537 | 0 | 198,537 | 12.7% | 17 Mar, 2026 |
| 4 | Diem Nguyen | Chief Executive Officer | 138,767 | 0 | 138,767 | 8.9% | 17 Mar, 2026 |
| 5 | James Antal | Director | 116,857 | 0 | 116,857 | 7.5% | 15 Jun, 2022 |
| 6 | Jaymie A Durnan | Director | 88,754 | 0 | 88,754 | 5.7% | 10 Jun, 2026 |
| 7 | Michael C. Plansky | Director | 75,982 | 0 | 75,982 | 4.9% | 15 Jun, 2022 |
| 8 | Holly L. Phillips | Director | 73,754 | 0 | 73,754 | 4.7% | 10 Jun, 2026 |
| 9 | Gary J. Nabel | Director | 73,754 | 0 | 73,754 | 4.7% | 10 Jun, 2026 |
| 10 | Julian Nemirovsky | Director | 73,754 | 0 | 73,754 | 4.7% | 10 Jun, 2026 |
| 11 | Larry R. Miller | General Counsel | 51,912 | 0 | 51,912 | 3.3% | 26 Mar, 2026 |
| 12 | Julie Kane | Director | 48,482 | 0 | 48,482 | 3.1% | 15 Jun, 2022 |
| 13 | Harold Eugene Jr. Ford | Director | 47,538 | 0 | 47,538 | 3.0% | 10 Jun, 2026 |
| 14 | Jay Varma | Evp Chief Medical Officer | 17,298 | 0 | 17,298 | 1.1% | 13 Jun, 2024 |
| 15 | Evan A. Knisely | Director | 17,298 | 0 | 17,298 | 1.1% | 13 Jun, 2024 |
| 16 | John M Keane | Director | 16,881 | 0 | 16,881 | 1.1% | 10 Jun, 2026 |
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 |
|---|---|---|---|---|---|---|---|---|
| 09 Jun, 2026 | John M Keane | Director | Acquired M | 24,116 | — | — | 24,116 | Direct |
| 09 Jun, 2026 | Harold Eugene Jr. Ford | Director | Acquired M | 24,116 | — | — | 54,773 | Direct |
| 09 Jun, 2026 | Gary J. Nabel | Director | Acquired M | 24,116 | — | — | 80,989 | Direct |
| 09 Jun, 2026 | Jaymie A Durnan | Director | Acquired M | 24,116 | — | — | 95,989 | Direct |
| 09 Jun, 2026 | Julian Nemirovsky | Director | Acquired M | 24,116 | — | — | 80,989 | Direct |
| 09 Jun, 2026 | Joseph W Iii Marshall | Director | Acquired M | 24,116 | — | — | 253,758 | Direct |
| 09 Jun, 2026 | Holly L. Phillips | Director | Acquired M | 24,116 | — | — | 80,989 | Direct |
| 09 Jun, 2026 | John M Keane | Director | Disposed D | 7,235 | $4.39 | $31.76K | 16,881 | Direct |
| 09 Jun, 2026 | Harold Eugene Jr. Ford | Director | Disposed D | 7,235 | $4.39 | $31.76K | 47,538 | Direct |
| 09 Jun, 2026 | Joseph W Iii Marshall | Director | Disposed D | 7,235 | $4.39 | $31.76K | 246,523 | Direct |
| 09 Jun, 2026 | Jaymie A Durnan | Director | Disposed D | 7,235 | $4.39 | $31.76K | 88,754 | Direct |
| 09 Jun, 2026 | Holly L. Phillips | Director | Disposed D | 7,235 | $4.39 | $31.76K | 73,754 | Direct |
| 09 Jun, 2026 | Julian Nemirovsky | Director | Disposed D | 7,235 | $4.39 | $31.76K | 73,754 | Direct |
| 09 Jun, 2026 | Gary J. Nabel | Director | Disposed D | 7,235 | $4.39 | $31.76K | 73,754 | Direct |
| 09 Jun, 2026 | Harold Eugene Jr. Ford | Director | Disposed M | 24,116 | $0.00 | $0 | 0 | Direct |
| 09 Jun, 2026 | John M Keane | Director | Disposed M | 24,116 | $0.00 | $0 | 0 | Direct |
| 09 Jun, 2026 | Julian Nemirovsky | Director | Disposed M | 24,116 | $0.00 | $0 | 0 | Direct |
| 09 Jun, 2026 | Jaymie A Durnan | Director | Disposed M | 24,116 | $0.00 | $0 | 0 | Direct |
| 09 Jun, 2026 | Joseph W Iii Marshall | Director | Disposed M | 24,116 | $0.00 | $0 | 0 | Direct |
| 09 Jun, 2026 | Gary J. Nabel | Director | Disposed M | 24,116 | $0.00 | $0 | 0 | Direct |