X0508 4 2024-03-06 0001177648 ENANTA PHARMACEUTICALS INC ENTA 0001236389 FOLETTA MARK G C/O ENANTA PHARMACEUTICALS, INC. 500 ARSENAL STREET WATERTOWN MA 02472 1 0 0 0 0 Stock Option (right to buy) 15.66 2024-03-06 4 A 0 15700 0 A 2034-03-06 Common Stock 15700 15700 D Such option will become exercisable monthly in substantially equal installments over one year, beginning from the date of grant (March 6, 2024), with the final monthly installment vesting on the nearest trading day on the Nasdaq Global Select Market preceding the 2025 annual meeting of stockholders. /s/ Paul J. Mellett as attorney-in-fact 2024-03-08