Brad Ian Meyers - 16 May 2025 Form 4/A - Amendment Insider Report for 374Water Inc. (SCWO)

Role: Chief Operating Officer
Signature: /s/ Brad Ian Meyers
Issuer symbol: SCWO
Transactions as of: 16 May 2025
Net transactions value: $0
Form type: 4/A - Amendment
Filing time: 03 Sep 2025, 10:11:22 UTC
Date Of Original Report: 22 May 2025
Previous filing: 22 May 2024
Next filing: 03 Sep 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Meyers Brad Ian	Chief Operating Officer	C/O 374 WATER INC., 100 SOUTHCENTER COURT, SUITE 200, MORRISVILLE	/s/ Brad Ian Meyers	02 Sep 2025	0002000149

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SCWO	Common Stock (restricted stock units)	Award	$0	+115,500		$0.000000	115,500	16 May 2025	Direct	F1

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
transaction	SCWO	Restricted Stock Units	Award	$0	+115,500		$0.000000	115,500	16 May 2025	Common Stock, $0.0001 par value	115,500	$0.000000	Direct	F1, F2, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The Restricted Stock Units (the "RSU") reported herein were granted to the Reporting Person May 16, 2024 (the "Effective Date") pursuant to his Employment Agreement (the "Employment Agreement"). The RSU grants consisted of an RSU for 115,500 shares that vest over time (the "Time RSU") and an RSU for 115,500 shares that vest on the achievement of certain milestones (the "Performance RSU"). 28,875 of the shares subject to the Time RSU vested on May 16, 2025, and the remaining 86,625 shares vest in equal increments on the last day of every month thereafter over the following 36 months, subject to the Reporting Person's continued employment with the Issuer on each vesting date. As of September 2, 2025, 36,093 shares subject to the Time RSU were vested, and 79,407 shares are unvested.
F2	On May 22, 2024, the Reporting Person filed a Form 4 that reported both the Time RSU and the Performance RSU in Table II. This amendment serves to remove the Time RSU from Table II and report it in Table I.
F3	Under the Employment Agreement, the Reporting Person was granted the Performance RSU, that vest pursuant to certain milestones set forth by the Issuer.