X0508 4 2026-03-11 0001177648 ENANTA PHARMACEUTICALS INC ENTA 0001508596 Peterson Kristine C/O ENANTA PHARMACEUTICALS, INC. 4 KINGSBURY AVENUE WATERTOWN MA 02472 1 0 0 0 0 Stock Option (right to buy) 14.17 2026-03-11 4 A 0 20000 0 A 2036-03-11 Common Stock 20000 20000 D Such option will become exercisable monthly in substantially equal installments over one year, beginning from the date of grant (March 11, 2026), with the final monthly installment vesting no later than the nearest trading day on the Nasdaq Global Select Market preceding the 2027 annual meeting of stockholders. /s/ Matthew Kowalsky as attorney-in-fact 2026-03-13