| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Savitz Ryan | CFO & CBO | C/O DIANTHUS THERAPEUTICS, INC., 7 TIMES SQUARE, 43RD FLOOR, NEW YORK | /s/ Adam Veness, as attorney-in-fact for Ryan Savitz | 25 Sep 2025 | 0001992324 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | DNTH | Stock Option (Right to Buy) | Award | $0 | +60,000 | $0.000000 | 60,000 | 23 Sep 2025 | Common Stock | 60,000 | $37.87 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | The shares of common stock underlying this stock option award will vest in equal monthly installments over the four years after September 23, 2025, subject to the Reporting Person's continued service to the Issuer on each such vesting date. |