X0508 4 2026-02-03 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 Stock Option (Right to Buy) 52.46 2026-02-03 4 A false 355000 0 A 2036-02-03 Common Stock 355000 355000 D The shares of common stock underlying this stock option award will vest in equal monthly installments over the four years after January 1, 2026, 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 2026-02-04