| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Huber Martin H. Jr. | Director | C/O SYNDAX PHARMACEUTICALS, INC., 730 THIRD AVENUE, FLOOR 9, NEW YORK | /s/ Michael A. Metzger, as Attorney-in-Fact | 2025-05-19 | 0001653276 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | SNDX | Common Stock | Purchase | $45K | +5K | +6.76% | $8.99 | 79K | May 19, 2025 | Direct |