X0206 3 2023-11-06 0 0000933972 374Water Inc. SCWO 0002000149 Meyers Brad Ian C/O 374WATER INC. 701 W. MAIN STREET, SUITE 410 DURHAM NC 27701 true Chief Operating Officer Option to Purchase Common Stock 1.42 Common Stock 400000 D This option to purchase common stock was granted on November 6, 2023 and vests as follows: (a) 25% vesting on November 6, 2023 and (b) the balance vesting equally every month thereafter over the following 36 months beginning on December 31, 2023. Reporting Person must be an employee of the Issuer as of each vesting date. This option expires on November 6, 2033. /s/ Brad Ian Meyers 2023-11-13