X0508 4 2026-02-17 0 0001410636 American Water Works Company, Inc. AWK 0002062690 Sutton Lori 1 WATER STREET CAMDEN NJ 08102-1658 0 1 0 0 EVP, CHRO 0 Common Stock 2026-02-17 4 A 0 1364 0 A 2721 D Represents shares underlying an award of restricted stock units (RSUs) granted on February 17, 2026, under the American Water Works Company, Inc. 2017 Omnibus Equity Compensation Plan. These awards will vest in three approximately equal increments on January 31, 2027, 2028 and 2029, subject to continued employment on each vesting date and applicable continued vesting provisions in the event of retirement. RSUs are settled solely by the delivery of one share of common stock per RSU (and may not be settled in cash). /s/ Jeffrey M. Taylor, as attorney-in-fact for Lori A. Sutton 2026-02-18