Stephen H. McKnight - 09 Feb 2026 Form 3 Insider Report for 374Water Inc. (SCWO)

Role
Director
Signature
/s/ Stephen H. McKnight
Issuer symbol
SCWO
Transactions as of
09 Feb 2026
Net transactions value
$0
Form type
3
Filing time
27 Feb 2026, 17:07:54 UTC

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
McKnight Stephen H. Director C/O 374WATER INC., 100 SOUTHCENTER COURT, SUITE 200, MORRISVILLE /s/ Stephen H. McKnight 18 Feb 2026 0002114378

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
holding SCWO Common Stock 190,000 09 Feb 2026 Direct
holding SCWO Common Stock 1,500 09 Feb 2026 By the Stephen H. McKnight Revocable Trust, of which the Reporting Person is the sole trustee.

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
holding SCWO Warrants (right to buy) 09 Feb 2026 Common Stock 12,000 $1.94 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Remarks:

Exhibit 24.1 Power of Attorney