XBiotech's three largest insider shareholders as of August 04, 2026 are John Simard (Chief Executive Officer, 3.87Mn shares), W Thorpe Mckenzie (Director, 2.60Mn shares), Peter Libby (Director, 25.00K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| W Thorpe Mckenzie | - | 2,597,471 | 0 | 13 Jan, 2022 |
| John Simard | Chief Executive Officer | 3,873,166 | 0 | 15 Oct, 2021 |
| Donald H. Macadam | - | 10,000 | 0 | 12 Jul, 2021 |
| Peter Libby | - | 25,000 | 0 | 12 Jul, 2021 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 01 Oct, 2025 | Thomas Martin Kuendig | Director Stock Option | A | 79,115 | $0.00 | 79,115 | D | A |
| 01 Oct, 2025 | Craig Evan Rademaker | Director Stock Option | A | 92,104 | $0.00 | 92,104 | D | A |
| 01 Oct, 2025 | Tevi David Troy | Director Stock Option | A | 56,000 | $0.00 | 56,000 | D | A |
| 01 Oct, 2025 | David Spencer Soffer | Director Stock Option | A | 51,000 | $0.00 | 51,000 | D | A |
| 17 Mar, 2025 | John Simard | Stock Option | A | 1,026,228 | $0.00 | 1,896,609 | D | A |
| 31 Jan, 2025 | John Simard | Convertible Loan Agreement | D | 2,470,355 | $10,000,000.00 | 870,381 | D | J |
| 20 Jun, 2024 | Donald H. Macadam | Director Stock Option | A | 37,500 | $0.00 | 37,500 | D | A |
| 20 Jun, 2024 | W Thorpe Mckenzie | Director Stock Option | A | 37,500 | $0.00 | 37,500 | D | A |
| 20 Jun, 2024 | Peter Libby | Director Stock Option | A | 37,500 | $0.00 | 37,500 | D | A |
| 20 Jun, 2024 | Jan-Paul Waldin | Director Stock Option | A | 37,500 | $0.00 | 37,500 | D | A |
| 03 Jan, 2024 | John Simard | Convertible Loan Agreement | A | 2,470,355 | $10,000,000.00 | 3,840,736 | D | P |
| 23 Jun, 2023 | Jan-Paul Waldin | Director Stock Option | A | 25,000 | $0.00 | 25,000 | D | A |
| 23 Jun, 2023 | W Thorpe Mckenzie | Director Stock Option | A | 25,000 | $0.00 | 25,000 | D | A |
| 23 Jun, 2023 | Peter Libby | Director Stock Option | A | 25,000 | $0.00 | 25,000 | D | A |
| 23 Jun, 2023 | Donald H. Macadam | Director Stock Option | A | 25,000 | $0.00 | 25,000 | D | A |
| 10 Feb, 2023 | Sushma Shivaswamy | Employee Stock Option (right to buy) | A | 100,000 | $0.00 | 100,000 | D | A |
| 22 Jun, 2022 | W Thorpe Mckenzie | Stock Option | A | 25,000 | $0.00 | 25,000 | D | A |
| 22 Jun, 2022 | Jan-Paul Waldin | Stock Option | A | 25,000 | $0.00 | 25,000 | D | A |
| 22 Jun, 2022 | Donald H. Macadam | Stock Option | A | 25,000 | $0.00 | 25,000 | D | A |
| 22 Jun, 2022 | Peter Libby | Director Stock option | A | 25,000 | $0.00 | 25,000 | D | A |