374WATER Inc.

SCWO·NASDAQ·$2.30Share Price as of 11/2·$33MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/14/26 10-QQ1 ended 03/31/2605/14/26 10-K/AFY 202504/30/26 10-KFY 202503/31/26 10-QQ3 ended 09/30/2511/12/25

Disclosures

8-KCurrent report10/29/26 8-KCurrent report09/30/26 8-KCurrent report08/18/26 8-KCurrent report08/11/26 8-KCurrent report07/08/26

Prospectuses and Registrations

424B5Prospectus supplement08/11/26 424B5Prospectus supplement12/29/25 424B5Prospectus supplement12/29/25 S-3/AShelf registration (amended)12/15/25 S-3Shelf registration11/12/25

Proxies

DEF 14ADefinitive proxy08/25/26 PRE 14APreliminary proxy08/14/26 DEFA14AAdditional proxy materials12/15/25 DEFA14AAdditional proxy materials12/02/25 DEFA14AAdditional proxy materials11/12/25

Ownership

Form 4Insider transaction07/08/26 Form 4Insider transaction06/15/26 144Proposed sale of securities06/11/26 Form 4Insider transaction04/30/26 SC 13D/ABeneficial ownership (amended)04/30/26

Other

EFFECTRequest for effectiveness12/23/25 CORRESPCorrespondence with the SEC12/19/25 SEC STAFF ACTIONSEC staff action05/04/23 EFFECTRequest for effectiveness12/30/22 CORRESPCorrespondence with the SEC12/29/22