| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Garcia Marino | CEO AND PRESIDENT, Director | C/O DIANTHUS THERAPEUTICS, INC., 7 TIMES SQUARE, 43RD FLOOR, NEW YORK | /s/ Adam Veness, as attorney-in-fact for Marino Garcia | 17 Mar 2026 | 0001669866 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | DNTH | Common Stock | Options Exercise | +59,700 | $6.70* | 59,700 | 16 Mar 2026 | Direct | |||
| transaction | DNTH | Common Stock | Options Exercise | +5,592 | +9.4% | $17.88* | 65,292 | 16 Mar 2026 | Direct |
| 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) | Options Exercise | -59,700 | -100% | $0.000000* | 41 | 16 Mar 2026 | Common Stock | 59,700 | $6.70 | Direct | F1 | |
| transaction | DNTH | Stock Option (Right to Buy) | Options Exercise | -5,592 | -2% | $0.000000* | 269,408 | 16 Mar 2026 | Common Stock | 5,592 | $17.88 | Direct | F2 |
| Id | Content |
|---|---|
| F1 | The shares of common stock underlying this stock option award vested as to 25% of the shares on November 1, 2022, with the remaining three quarters vested in equal monthly installments over the following three years, subject to the Reporting Person's continued service to the Issuer on each such vesting date. |
| F2 | The shares of common stock underlying this stock option award vest in equal monthly installments over the four years after January 1, 2024, subject to the Reporting Person's continued service to the Issuer on each such vesting date. |