X0508 4 2025-08-26 0000933972 374Water Inc. SCWO 0001935149 Estes Deanna Rene C/O 374 WATER INC. 100 SOUTHCENTER COURT, SUITE 200 MORRISVILLE NC 27560 true false false false Common Stock 2025-08-26 4 P false 30000 0.2902 A 106500 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $0.2849 to $0.2903, inclusive. The reporting person undertakes to provide to 374Water Inc., any security holder of 374Water Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in footnote (1) to this Form 4. /s/ Deanna Rene Estes 2025-08-27