SAB Biotherapeutics's three largest insider shareholders as of September 29, 2026 are Capital (Master), L.P. Sessa (Director, 2.20Mn shares), Andrew Moin (Director, 2.20Mn shares), Eddie Joe Sullivan (Chief Executive Officer, 523.23K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Andrew Moin | Director | 0 | 2,198,457 | 2,198,457 | 35.8% | 01 Oct, 2025 |
| 2 | Capital (Master), L.P. Sessa | Director | 2,198,457 | 0 | 2,198,457 | 35.8% | 01 Oct, 2025 |
| 3 | Eddie Joe Sullivan | Chief Executive Officer | 523,230 | 0 | 523,230 | 8.5% | 08 Dec, 2023 |
| 4 | Edward D. Hamilton | TenPercentOwner | 509 | 504,935 | 505,444 | 8.2% | 26 Oct, 2021 |
| 5 | Christine E Hamilton | Director, TenPercentOwner | 0 | 311,133 | 311,133 | 5.1% | 09 Dec, 2022 |
| 6 | Helen K. Ellias | Director | 0 | 285,714 | 285,714 | 4.7% | 28 Nov, 2023 |
| 7 | Alexandra Kropotova | Chief Medical Officer | 41,853 | 0 | 41,853 | 0.7% | 18 Sep, 2026 |
| 8 | Jeffrey G Spragens | Director | 39,499 | 0 | 39,499 | 0.6% | 09 Dec, 2022 |
| 9 | Samuel J Reich | Executive Chairman | 21,900 | 0 | 21,900 | 0.4% | 30 Nov, 2023 |
| 10 | David Charles Link | Director | 5,731 | 0 | 5,731 | 0.1% | 09 Dec, 2022 |
| 11 | Frederick Finnegan | Chief Business Officer | 3,860 | 0 | 3,860 | 0.1% | 26 Oct, 2021 |
| 12 | Thomas Charles Luke | Chief Medical Officer | 543 | 0 | 543 | 0.0% | 26 Oct, 2021 |
| 13 | Michael King | Chief Financial Officer | 500 | 0 | 500 | 0.0% | 30 Nov, 2023 |
| 14 | Russell P Beyer | Chief Financial Officer | 248 | 2 | 249 | 0.0% | 16 Nov, 2021 |
| 15 | Ilan Katz | Director, TenPercentOwner | 150 | 0 | 150 | 0.0% | 15 Oct, 2021 |
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 |
|---|---|---|---|---|---|---|---|---|
| 17 Sep, 2026 | Alexandra Kropotova | Chief Medical Officer | Disposed F | 473 | — | — | 41,853 | Direct |
| 25 Jun, 2026 | Alexandra Kropotova | Chief Medical Officer | Disposed F | 988 | — | — | 42,308 | Direct |
| 24 Mar, 2026 | Alexandra Kropotova | Chief Medical Officer | Disposed F | 988 | — | — | 43,296 | Direct |
| 03 Feb, 2026 | Christoph Lawrence Bausch | Chief Operating Officer | Acquired A | 1,800,000 | $0.00 | $0 | 1,800,000 | Direct |
| 03 Feb, 2026 | Lucy To | Officer | Acquired A | 2,400,000 | $0.00 | $0 | 2,400,000 | Direct |
| 03 Feb, 2026 | Eddie Joe Sullivan | President | Acquired A | 3,000,000 | $0.00 | $0 | 3,000,000 | Direct |
| 03 Feb, 2026 | Alexandra Kropotova | Chief Medical Officer | Acquired A | 2,400,000 | $0.00 | $0 | 2,400,000 | Direct |
| 03 Feb, 2026 | Samuel J Reich | Ceo | Acquired A | 4,800,000 | $0.00 | $0 | 4,800,000 | Direct |
| 05 Jan, 2026 | David Zaccardelli | Director | Acquired A | 240,000 | $0.00 | $0 | 240,000 | Direct |
| 05 Jan, 2026 | Rita Jain | Director | Acquired A | 240,000 | $0.00 | $0 | 240,000 | Direct |
| 16 Dec, 2025 | Helen K. Ellias | Director | Acquired A | 150,000 | $0.00 | $0 | 150,000 | Direct |
| 16 Dec, 2025 | Scott Giberson | Director | Acquired A | 150,000 | $0.00 | $0 | 150,000 | Direct |
| 16 Dec, 2025 | William James Polvino | Director | Acquired A | 150,000 | $0.00 | $0 | 150,000 | Direct |
| 16 Dec, 2025 | David Link | Director | Acquired A | 150,000 | $0.00 | $0 | 150,000 | Direct |
| 16 Dec, 2025 | Erick Lucera | Director | Acquired A | 150,000 | $0.00 | $0 | 150,000 | Direct |
| 16 Dec, 2025 | Jay S Skyler | Director | Acquired A | 150,000 | $0.00 | $0 | 150,000 | Direct |
| 11 Dec, 2025 | Alexandra Kropotova | Chief Medical Officer | Disposed F | 988 | — | — | 44,284 | Direct |
| 29 Sep, 2025 | Andrew Moin | Director | Acquired M | 1,740,000 | $1.75 | $3.05Mn | 2,198,457 | Indirect |
| 29 Sep, 2025 | Capital (Master), L.P. Sessa | Director | Acquired M | 1,740,000 | $1.75 | $3.05Mn | 2,198,457 | Direct |
| 29 Sep, 2025 | Andrew Moin | Director | Disposed M | 17,400 | — | — | 211,100 | Indirect |