Through the 90-day period concluding February 19, 2026, X4 Pharmaceuticals's top three insider stakeholders include Executive Chairman Adam R Craig (376.09K shares), President John Volpone (289.88K shares), Chief Financial Officer David Kirske (193.25K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Paula Ragan | President And Ceo | 111,235 | 14 Feb, 2025 |
| Mary Dibiase | Chief Operating Officer | 38,029 | 14 Feb, 2025 |
| Christophe Arbet-Engels | Chief Medical Officer | 28,804 | 14 Feb, 2025 |
| Adam S. Mostafa | Chief Financial Officer | 28,331 | 14 Feb, 2025 |
| Arthur Taveras | Chief Scientific Officer | 12,933 | 08 Oct, 2024 |
| Adam R Craig | Executive Chairman | 376,087 | 27 Oct, 2025 |
| John Volpone | President | 289,881 | 14 Aug, 2025 |
| David Kirske | Chief Financial Officer | 193,254 | 14 Aug, 2025 |
| Derek M Meisner | Chief Legal Officer | 4,838 | 19 Aug, 2022 |
| Diego Cadavid | Chief Medical Officer | 3,470 | 01 Mar, 2022 |
| William Aliski | 3,222 | 11 Jun, 2024 | |
| Alison Frances Lawton | 3,222 | 11 Jun, 2024 | |
| Mark Baldry | Chief Commercial Officer | 25,337 | 03 Jun, 2025 |
| Natasha Fay Thoren | Chief Legal Officer | 9,462 | 03 Jul, 2025 |
| Murray Stewart | 7,883 | 10 Jun, 2025 | |
| Keith Woods | 6,000 | 10 Jun, 2025 | |
| Michael S Wyzga | 5,555 | 10 Jun, 2025 | |
| Gary Bridger | 4,722 | 10 Jun, 2025 | |
| Craecker Francoise De | 4,722 | 10 Jun, 2025 | |
| David W J Mcgirr | 4,722 | 10 Jun, 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 |
|---|---|---|---|---|---|---|---|---|
| 23 Oct, 2025 | Adam R Craig | Common Stock | A | 86,206 | $2.90 | 376,087 | D | P |
| 14 Aug, 2025 | David Kirske | Common Stock | A | 193,254 | $0.00 | 193,254 | D | A |
| 14 Aug, 2025 | Adam R Craig | Common Stock | A | 289,881 | $0.00 | 289,881 | D | A |
| 14 Aug, 2025 | John Volpone | - | - | 289,881 | D | |||
| 14 Aug, 2025 | John Volpone | Common Stock | A | 289,881 | $0.00 | 289,881 | D | A |
| 09 Jun, 2025 | Michael S Wyzga | Common Stock | A | 1,500 | $0.00 | 5,555 | D | A |
| 09 Jun, 2025 | David W J Mcgirr | Common Stock | A | 1,500 | $0.00 | 4,722 | D | A |
| 09 Jun, 2025 | Gary Bridger | Common Stock | A | 1,500 | $0.00 | 4,722 | D | A |
| 09 Jun, 2025 | Murray Stewart | - | - | 7,883 | D | |||
| 09 Jun, 2025 | Murray Stewart | Common Stock | A | 1,500 | $0.00 | 7,883 | D | A |
| 09 Jun, 2025 | Craecker Francoise De | Common Stock | A | 1,500 | $0.00 | 4,722 | D | A |
| 09 Jun, 2025 | Keith Woods | Common Stock | A | 1,500 | $0.00 | 6,000 | D | A |
| 20 May, 2025 | Natasha Fay Thoren | Common Stock | A | 3,333 | $0.00 | 9,462 | D | A |
| 20 May, 2025 | Natasha Fay Thoren | - | - | 9,462 | D | |||
| 16 May, 2025 | Mark Baldry | Common Stock | A | 1,032 | $2.48 | 25,337 | D | P |
| 16 May, 2025 | Mark Baldry | Common Stock | A | 1,032 | $2.48 | 25,337 | D | A |
| 16 May, 2025 | Mark Baldry | - | - | 25,337 | D | |||
| 12 Feb, 2025 | Adam S. Mostafa | Common Stock | A | 850,000 | $0.00 | 28,331 | D | A |
| 12 Feb, 2025 | Paula Ragan | Common Stock | A | 2,250,000 | $0.00 | 111,235 | D | A |
| 12 Feb, 2025 | Christophe Arbet-Engels | Common Stock | A | 850,000 | $0.00 | 28,804 | D | A |