X0609 4 2026-05-21 0001690585 Dianthus Therapeutics, Inc. /DE/ DNTH 0001542650 Lawton Alison Frances false C/O DIANTHUS THERAPEUTICS, INC. 7 TIMES SQUARE, 43RD FLOOR NEW YORK NY 10036 true false false false false Stock Option (Right to Buy) 89.63 2026-05-21 4 A false 6090 0 A 2036-05-21 Common Stock 6090 6090 D The shares of common stock underlying this stock option award will vest in full on the date that is the earlier of (i) the first anniversary of the grant date or (ii) the Issuer's 2027 Annual Meeting of Stockholders, subject to the Reporting Person's continued service to the Issuer through the vesting date. /s/ Adam Veness, as attorney-in-fact for Alison Frances Lawton 2026-05-22