X0508 4 2025-08-28 0000933972 374Water Inc. SCWO 0002049257 Russell Kline C/O 374 WATER INC. 100 SOUTHCENTER COURT SUITE 200 MORRISVILLE NC 27560 true Chief Financial Officer false Common Stock (restricted stock unit) 2025-08-28 4 A false 250000 0 A 648642 D The restricted stock unit vests in equal monthly installments over 36 months, on the last day of each month, beginning on March 31, 2025, subject to the Reporting Person's continuous service through each vesting date. /s/ Russell Kline 2025-09-02