| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Katkin Keith | Director | C/O SYNDAX PHARMACEUTICALS, INC., 730 THIRD AVENUE, FLOOR 9, NEW YORK | /s/ Michael A. Metzger, as Attorney-in-Fact | 06 Feb 2026 | 0001314596 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | SNDX | Common Stock | Award | $0 | +24,000 | +24% | $0.000000 | 124,000 | 04 Feb 2026 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Award of Restricted Stock Units that vests one year from the date of grant. The shares underlying such Restricted Stock Units will not be delivered to the Reporting Person and may not be transferred or sold until the earlier of a separation from service, death, disability or change in control. |