UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K/A

(Amendment No. 1)

CURRENT REPORT PURSUANT

TO SECTION 13 OR 15(d) OF

THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (date of earliest event reported): February 4, 2026

374WATER INC.

(Exact Name of Registrant as Specified in Charter)

Delaware

000-27866

88-0271109

(State or Other Jurisdiction

of Incorporation)

(Commission

File No.)

(I.R.S. Employer

Identification No.)

100 Southcenter Court, Suite 200

Morrisville, NC 27560

(Address of Principal Executive

Offices)(Zip Code)

(440) 601-9677

(Registrant’s Telephone Number, Including Area Code)

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading

Symbol(s)

Name of each exchange on

which registered

Common Stock, par value $0.0001

SCWO

The Nasdaq Capital Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

374Water Inc. (the “Company”) filed a Current Report on Form 8-K on February 9, 2026 (the “Form 8-K”) to report, among other things, the appointment of Stephen McKnight to the Company’s Board of Directors (the “Board”). At the time the Form 8-K was filed, the Board had not yet made a determination regarding Board committee assignments for Mr. McKnight.

The Form 8-K is hereby amended solely to report that, on February 23, 2026, the Board appointed Mr. McKnight to the Board’s Nominating and Corporate Governance Committee and Compensation Committee, effective as of such date.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Company has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated: February 25, 2026	374WATER INC.

	By:	/s/ Danny Bogar
	Name:	Danny Bogar
	Title:	President and Chief Executive Officer

374Water Inc. 8-K/A