X4 Pharmaceuticals, Inc
SEC CIK 1501697 · XFOR · last insider filing 2026-05-13
Directors (from insider filings)
| Name | Capacity as filed | Filings |
|---|---|---|
| Bridger Gary | Director | filed 2019 - 2026 |
| Wyzga Michael S | Director | filed 2019 - 2026 |
| Stewart Murray | Director · Interim Chief Medical Officer | filed 2019 - 2026 |
| de Craecker Francoise | Director | filed 2021 - 2026 |
| Craig Adam R | Director · Executive Chairman | filed 2025 - 2025 |
| Mcgirr David W J | Director | filed 2017 - 2025 |
| Woods Keith | Director | filed 2023 - 2025 |
| Ragan Paula | Director · President and CEO | filed 2019 - 2025 |
| Lawton Alison Frances | Director | filed 2020 - 2024 |
| Aliski William | Director | filed 2019 - 2024 |
| Russo Rene | Director · See Remarks | filed 2017 - 2021 |
| Blech Isaac | Director | filed 2019 - 2019 |
| Gray Michael | Director · See Remarks | filed 2017 - 2018 |
| Mcguire Terrance | Director | filed 2017 - 2018 |
| Ross Michael Jay | Director | filed 2017 - 2018 |
| Gordon Carl L | Director | filed 2017 - 2018 |
| Clark William D | Director | filed 2017 - 2018 |
| Schulman AMY W | Director | filed 2017 - 2018 |
| Nessi Claudio | Director | filed 2017 - 2018 |
| Gerngross Tillman U. | Director | filed 2017 - 2018 |
Officers (from insider filings)
| Name | Title as filed | Filings |
|---|---|---|
| Kirske David | Chief Financial Officer | filed 2025 - 2026 |
| Volpone John | President | filed 2025 - 2025 |
| Thoren Natasha Fay | Chief Legal Officer | filed 2025 - 2025 |
| Baldry Mark | Chief Commercial Officer | filed 2022 - 2025 |
| Mostafa Adam S. | See Remarks | filed 2019 - 2025 |
| Arbet-Engels Christophe | Chief Medical Officer | filed 2023 - 2025 |
| Dibiase Mary | Chief Operating Officer | filed 2021 - 2025 |
| Taveras Arthur | Chief Scientific Officer | filed 2020 - 2024 |
| Meisner Derek M | General Counsel | filed 2019 - 2022 |
| Cadavid Diego | Chief Medical Officer | filed 2020 - 2022 |
| Skerlj Renato | Chief Scientific Officer | filed 2020 - 2020 |
| Kelley Lynne E | See Remarks | filed 2019 - 2019 |
| Stevens Anthony Chris | Chief Medical Officer | filed 2017 - 2018 |
| Mantus David | Chief Development Officer | filed 2017 - 2018 |
| Nagy Eszter | Chief Scientific Officer | filed 2017 - 2018 |
About this record
From the SEC's insider-transaction filings (Forms 3, 4 and 5). Every reporting director and officer carries a Commission-assigned identifier (CIK), so these footprints are identifier-verified - no name matching involved. Insiders file when they transact, so dates are filing dates: "last filed" never means "served until". This layer is not yet joined to the nonprofit register - identity joins ship only after independent review.
Source: SEC Insider Transactions Data Sets (Forms 3/4/5), US Federal Government public domain.