| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Craig Adam R | Executive Chairman, Director | C/O X4 PHARMACEUTICALS INC., 61 NORTH BEACON STREET, 4TH FLOOR, BOSTON | /s/ David Kirske, Attorney-In-Fact | 14 Aug 2025 | 0001339498 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | XFOR | Common Stock | Award | $0 | +290K | $0.00 | 290K | 14 Aug 2025 | Direct | F1 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | XFOR | Stock Option (right to buy) | Award | $0 | +1.61M | $0.00 | 1.61M | 12 Aug 2025 | Common Stock | 1.61M | $1.42 | Direct | F2 | |
| transaction | XFOR | Stock Option (right to buy) | Award | $0 | +529K | $0.00 | 529K | 14 Aug 2025 | Common Stock | 529K | $3.14 | Direct | F2 |
| Id | Content |
|---|---|
| F1 | Represents restricted stock units (RSUs) granted to the Reporting Person. One third of the RSUs shall vest on each of August 12, 2026, August 12, 2027 and August 12, 2028, subject to the Reporting Person continuing to provide services through each such date and contingent upon approval of the grant at the Issuer's 2026 Annual Meeting of Stockholders. |
| F2 | One third of the shares subject to the option shall vest on August 12, 2026, with the remainder vesting in equal installments each successive month thereafter for a period of 24 months, subject to the Reporting Person continuing to provide services through each such date. |