15 insiders reported 31 Form 4 transactions for X4 Pharmaceuticals, Inc (XFOR) over the past 18 months (most recent 2026-05-13). Recent activity: KIRSKE DAVID (Chief Financial Officer) Sell 16,961 shares, Craig Adam R (Executive Chairman) Buy 86,206 shares, KIRSKE DAVID (Chief Financial Officer) Buy 193,254 shares, Craig Adam R (Executive Chairman) Buy 289,881 shares, Volpone John (President) Buy 289,881 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-13 | KIRSKE DAVID | Chief Financial Officer | Sell | 16,961 | $72,820 |
| 2025-10-27 | Craig Adam R | Executive Chairman | Buy | 86,206 | $249,997 |
| 2025-08-14 | KIRSKE DAVID | Chief Financial Officer | Buy | 193,254 | $0 |
| 2025-08-14 | Craig Adam R | Executive Chairman | Buy | 289,881 | $0 |
| 2025-08-14 | Volpone John | President | Buy | 289,881 | $0 |
| 2025-07-03 | Thoren Natasha Fay | Chief Legal Officer | Buy | 3,333 | $0 |
| 2025-06-10 | Woods Keith | Director | Buy | 1,500 | $0 |
| 2025-06-10 | Bridger Gary | Director | Buy | 1,500 | $0 |
| 2025-06-10 | WYZGA MICHAEL S | Director | Buy | 1,500 | $0 |
| 2025-06-10 | MCGIRR DAVID W J | Director | Buy | 1,500 | $0 |
| 2025-06-10 | de Craecker Francoise | Director | Buy | 1,500 | $0 |
| 2025-06-10 | Stewart Murray | Director | Buy | 1,500 | $0 |
| 2025-06-03 | Baldry Mark | Chief Commercial Officer | Buy | 1,032 | $2,559 |
| 2025-05-20 | Baldry Mark | Chief Commercial Officer | Buy | 1,032 | $2,559 |
| 2025-02-14 | Mostafa Adam S. | Chief Financial Officer | Buy | 850,000 | $0 |
| 2025-02-14 | Baldry Mark | Chief Commercial Officer | Buy | 21,646 | $14,719 |
| 2025-02-14 | Baldry Mark | Chief Commercial Officer | Buy | 13,404 | $4,557 |
| 2025-02-14 | Baldry Mark | Chief Commercial Officer | Buy | 600,000 | $0 |
| 2025-02-14 | DiBiase Mary | Chief Operating Officer | Buy | 650,000 | $0 |
| 2025-02-14 | Arbet-Engels Christophe | Chief Medical Officer | Buy | 850,000 | $0 |
| 2025-02-14 | Ragan Paula | President and CEO | Buy | 2.2M | $0 |
| 2025-01-27 | Arbet-Engels Christophe | Chief Medical Officer | Buy | 25,831 | $0 |
| 2025-01-27 | Arbet-Engels Christophe | Chief Medical Officer | Sell | 11,624 | $5,231 |
| 2025-01-27 | Mostafa Adam S. | Chief Financial Officer | Buy | 74,773 | $0 |
| 2025-01-27 | Mostafa Adam S. | Chief Financial Officer | Sell | 74,773 | $33,648 |
Source: SEC Form 4 filings · as of 2026-05-13
