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374Water Inc.

SCWO
Exchange
Nasdaq
Industry
Motors & Generators
SEC CIK
0000933972

No open-market purchases or sales by 374Water Inc. insiders were filed in the last 90 days; 44 institutions reported holding it in 13F filings for Q2 2026, worth $3.40M in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by 374Water Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
0 filings
Insiders trading
0
Net value
$0
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for 374Water Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for 374Water Inc.
NameTitleLast reported holdingLast filingFilings, past year
Weiser Charles MauriceChief Financial Officer–Jul 8, 20261
Meyers Brad IanChief Operating Officer30,169Jun 15, 20262
Nagar Yaacov10% Owner1,771,263Apr 30, 20267
Russell KlineChief Financial Officer668,642Dec 18, 20252
Jones Stephen JInterim CEO1,055,723Dec 17, 20252
Melkote Rajesh RamaswamyChief Technology Officer882,756Oct 23, 20251
Gannon Chris MChief Executive Officer2,370,000Sep 3, 20250
Penn Buddie JDirector577,962Sep 2, 20250
Estes Deanna ReneDirector853,470Sep 2, 20250
Vanderhider James MichaelDirector596,130Sep 2, 20250
Mandel PeterGeneral Counsel638,575Sep 2, 20250
Pawloski JamesDirector619,431Sep 2, 20250
Davis Richard HDirector1,143,793Jan 2, 20250
Deshusses MarcDirector, 10% Owner22,652,451Nov 19, 20240
Merrell TerryDirector40,000Nov 19, 20240
Anderson AdrienneChief Financial Officer71,762Nov 19, 20240
Abitbol Israel DavidChief Financial Officer402,716Apr 20, 20230

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Jun 15, 2026 (view filing)Jun 11-124 daysMeyers Brad IanChief Operating OfficerSSale−18.8K$2.39−$45.0K−38.4%30.2K after2 lots
Dec 18, 2025 (view filing)5:25 PM ETDec 162 daysRussell KlineChief Financial OfficerPPurchase+20.0K$0.22+$4.40K+3.1%668.6K after
Dec 17, 2025 (view filing)5:14 PM ETDec 161 dayJones Stephen JInterim CEOPPurchase+450.0K$0.2311+$104.0K+74.3%1.06M after
Oct 24, 2025 (view filing)6:47 PM ETOct 22-232 daysNagar Yaacov10% OwnerSSale−534.2K$0.4325−$231.1K−1.6%32.1M after2 lots
Oct 22, 2025 (view filing)7:44 PM ETOct 20-222 daysNagar Yaacov10% OwnerSSale−330.5K$0.4205−$139.0K−1.0%32.6M after3 lots
Oct 20, 2025 (view filing)8:08 PM ETOct 16-174 daysNagar Yaacov10% OwnerSSale−217.1K$0.4583−$99.5K−0.7%33.0M after2 lots
Oct 16, 2025 (view filing)Oct 14-152 daysNagar Yaacov10% OwnerSSale−1.06M$0.52−$553.2K−3.1%33.2M after2 lots
Oct 10, 2025 (view filing)5:27 PM ETOct 82 daysNagar Yaacov10% OwnerSSale−1.50M$0.4641−$695.7K−4.2%34.3M after
Oct 9, 2025 (view filing)8:46 PM ETOct 72 daysNagar Yaacov10% OwnerSSale−1.00K$0.39−$3900.0%35.8M after
Sep 8, 2025 (view filing)6:24 PM ETSep 5-83 daysNagar Yaacov10% OwnerSSale−177.3K$0.3948−$70.0K−0.5%35.8M after2 lots
Sep 8, 2025 (view filing)6:22 PM ETAug 2910 daysLateNagar Yaacov10% OwnerSSale−22.7K$0.39−$8.86K−0.1%35.9M after
Aug 27, 2025 (view filing)4:05 PM ETAug 261 dayEstes Deanna ReneDirectorPPurchase+30.0K$0.2902+$8.71K+39.2%106.5K after
Aug 26, 2025 (view filing)4:04 PM ETAug 251 dayPawloski JamesDirectorPPurchase+193.3K$0.2629+$50.8KNew position193.3K after
Aug 25, 2025 (view filing)4:06 PM ETAug 21-224 daysRussell KlineChief Financial OfficerPPurchase+30.0K$0.2479+$7.44K+8.1%398.6K after2 lots
Aug 21, 2025 (view filing)4:07 PM ETAug 201 dayRussell KlineChief Financial OfficerPPurchase+20.0K$0.239+$4.78K+5.7%368.6K after
Aug 20, 2025 (view filing)4:06 PM ETAug 18-192 daysMandel PeterGeneral CounselPPurchase+5.00K$0.2498+$1.25K+1.9%263.6K after2 lots
Jun 30, 2025 (view filing)6:08 PM ETJun 26-274 daysNagar Yaacov10% OwnerSSale−126.8K$0.4206−$53.3K−0.4%36.0M after2 lots
Jun 25, 2025 (view filing)7:28 PM ETJun 23-242 daysNagar Yaacov10% OwnerSSale−96.1K$0.4226−$40.6K−0.3%36.1M after2 lots
Jun 25, 2025 (view filing)7:25 PM ETJun 187 daysNagar Yaacov10% OwnerSSale−51.6K$0.402−$20.7K−0.1%36.2M afterAmended
Jun 16, 2025 (view filing)6:47 PM ETJun 124 daysNagar Yaacov10% OwnerSSale−42.4K$0.40−$16.9K−0.1%36.2M after
Jun 5, 2025 (view filing)4:56 PM ETJun 32 daysJones Stephen JDirectorPPurchase+40.0K$0.475+$19.0K+28.7%179.6K after
Jun 3, 2025 (view filing)4:05 PM ETMay 304 daysJones Stephen JDirectorPPurchase+50.0K$0.4224+$21.1K+55.8%139.6K after
May 27, 2025 (view filing)4:04 PM ETMay 225 daysJones Stephen JDirectorPPurchase+40.0K$0.315+$12.6K+80.7%89.6K after
May 22, 2025 (view filing)7:57 PM ETMay 202 daysJones Stephen JDirectorPPurchase+49.6K$0.30+$14.9KNew position49.6K after
Mar 28, 2025 (view filing)9:16 PM ETMar 26-272 daysNagar Yaacov10% OwnerSSale−107.2K$0.4171−$44.7K−0.3%36.3M after2 lots
Feb 11, 2025 (view filing)6:21 PM ETFeb 74 daysNagar Yaacov10% OwnerSSale−12.4K$0.42−$5.22K0.0%36.4M after
Feb 7, 2025 (view filing)7:17 PM ETFeb 52 daysNagar Yaacov10% OwnerSSale−144.9K$0.4348−$63.0K−0.4%36.4M after
Feb 5, 2025 (view filing)6:37 PM ETFeb 3-42 daysNagar Yaacov10% OwnerSSale−228.0K$0.4911−$112.0K−0.6%36.5M after2 lots
Jan 27, 2025 (view filing)Jan 23-244 daysNagar Yaacov10% OwnerSSale−31.9K$0.5997−$19.1K−0.1%36.8M after2 lots
Jan 23, 2025 (view filing)Jan 21-222 daysNagar Yaacov10% OwnerSSale−56.2K$0.5965−$33.5K−0.2%36.8M after2 lots
Jan 21, 2025 (view filing)Jan 16-175 daysNagar Yaacov10% OwnerSSale−115.3K$0.6001−$69.2K−0.3%36.9M after2 lots
Jan 16, 2025 (view filing)Jan 14-152 daysNagar Yaacov10% OwnerSSale−73.6K$0.63−$46.4K−0.2%37.0M after2 lots
Jan 14, 2025 (view filing)Jan 104 daysNagar Yaacov10% OwnerSSale−69.6K$0.68−$47.3K−0.2%37.1M after
Nov 25, 2024 (view filing)Nov 187 daysLateDavis Richard HDirectorPPurchase+40.0K$1.25+$50.0K+33.2%160.5K after
Nov 25, 2024 (view filing)Nov 187 daysLateDavis Richard HDirectorPPurchase+60.0K–––60.0K afterDerivative
Nov 20, 2024 (view filing)Nov 182 daysGannon Chris MPresident & CEOPPurchase+120.0K$1.25+$150.0KNew position120.0K after
Nov 20, 2024 (view filing)Nov 182 daysGannon Chris MPresident & CEOPPurchase+180.0K–––180.0K afterDerivative
Nov 19, 2024 (view filing)Nov 181 dayDeshusses MarcDirector, 10% OwnerPPurchase+32.0K$1.25+$40.0K+0.1%22.7M after
Nov 19, 2024 (view filing)Nov 181 dayDeshusses MarcDirector, 10% OwnerPPurchase+48.0K–––48.0K afterDerivative
Nov 19, 2024 (view filing)Nov 181 dayPenn Buddie JDirectorPPurchase+20.0K$1.25+$25.0K+50.0%60.0K after
Nov 19, 2024 (view filing)Nov 181 dayPenn Buddie JDirectorPPurchase+30.0K–––30.0K afterDerivative
Nov 19, 2024 (view filing)Nov 181 dayAnderson AdrienneChief Financial OfficerPPurchase+10.0K$1.25+$12.5K+16.2%71.8K after
Nov 19, 2024 (view filing)Nov 181 dayAnderson AdrienneChief Financial OfficerPPurchase+15.0K–––15.0K afterDerivative
Nov 19, 2024 (view filing)Nov 181 dayVanderhider James MichaelDirectorPPurchase+250.0K$1.25+$312.5K+21.4%1.42M after
Nov 19, 2024 (view filing)Nov 181 dayVanderhider James MichaelDirectorPPurchase+375.0K–––375.0K afterDerivative
Nov 19, 2024 (view filing)Nov 181 dayEstes Deanna ReneDirectorPPurchase+24.0K$1.25+$30.0K+45.7%76.5K after
Nov 19, 2024 (view filing)Nov 181 dayEstes Deanna ReneDirectorPPurchase+36.0K–––36.0K afterDerivative
Nov 19, 2024 (view filing)Nov 181 dayMandel PeterGeneral CounselPPurchase+10.8K$1.25+$13.5K+4.4%258.6K after
Nov 19, 2024 (view filing)Nov 181 dayMandel PeterGeneral CounselPPurchase+16.2K–––16.2K afterDerivative
Nov 18, 2024 (view filing)Nov 144 daysNagar Yaacov10% OwnerSSale−8.56K$1.41−$12.1K0.0%37.1M after