X0306 4 2016-06-02 0 0001437402 ARDELYX, INC. ARDX 0001620152 Bazemore Robert B C/O ARDELYX, INC. 34175 ARDENWOOD BLVD, SUITE 200 FREMONT CA 94555 1 0 0 0 Stock Option (Right to Buy) 9.27 2016-06-02 4 A 0 25000 0.00 A 2026-06-02 Common Stock 25000 25000 D The option becomes exercisable as it vests and the shares subject to the option vest in 36 successive, equal monthly installments on each monthly anniversary of June 2, 2016, subject to the Reporting Person's continued employment or service relationship with the Issuer on each such vesting date. /s/ Elizabeth Grammer, Attorney-in-Fact for Robert Bazemore 2016-06-06