X0508 4 2026-03-16 false 0001690585 Dianthus Therapeutics, Inc. /DE/ DNTH 0001669866 Garcia Marino C/O DIANTHUS THERAPEUTICS, INC. 7 TIMES SQUARE, 43RD FLOOR NEW YORK NY 10036 true true false false CEO AND PRESIDENT false Common Stock 2026-03-16 4 M false 59700 6.70 A 59700 D Common Stock 2026-03-16 4 M false 5592 17.88 A 65292 D Stock Option (Right to Buy) 6.7 2026-03-16 4 M false 59700 0 D 2031-11-03 Common Stock 59700 41 D Stock Option (Right to Buy) 17.88 2026-03-16 4 M false 5592 0 D 2034-01-23 Common Stock 5592 269408 D 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. 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. /s/ Adam Veness, as attorney-in-fact for Marino Garcia 2026-03-17