144 0002000149 XXXXXXXX LIVE 0000933972 374Water Inc. 001-41420 100 Southcenter Court Suite 200 Morrisville NC 27560 6019677 Meyers Brad Ian OFFICER Common Charles Schwab & Co., Inc.

3000 Schwab Way Westlake TX 76262

18831 47266 17495504 06/10/2026 NASDAQ Comm Class A 12/23/2025 Restricted Stock Unit Issuer N 18831 12/23/2025 Equity Compensation Y 06/10/2026 /s/Brad I. Meyers