Chris M. Gannon - 22 Apr 2024 Form 4 Insider Report for 374Water Inc. (SCWO)

Role: Chief Executive Officer
Signature: /s/ Chris M. Gannon
Issuer symbol: SCWO
Transactions as of: 22 Apr 2024
Net transactions value: $0
Form type: 4
Filing time: 03 Sep 2025, 10:13:45 UTC
Next filing: 20 Nov 2024
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Gannon Chris M	Chief Executive Officer	C/O 374 WATER INC., 100 SOUTHCENTER COURT, SUITE 200, MORRISVILLE	/s/ Chris M. Gannon	02 Sep 2025	0001645284

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SCWO	Common Stock (restricted stock units)	Award	$0	+1,000,000	+833%	$0.000000	1,120,000	22 Apr 2024	Direct	F1, F2
transaction	SCWO	Common Stock (restricted stock units)	Award	$0	+1,250,000	+112%	$0.000000	2,370,000	28 Aug 2025	Direct	F3

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	+1,250,000		$0.000000	1,250,000	22 Apr 2024	Common Stock, $0.0001 par value	1,250,000	$0.000000	Direct	F1, F2, F4

* 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 "2024 RSUs") reported herein were granted to the Reporting Person on April 22, 2024, pursuant to his Employment Agreement (the "Employment Agreement"), dated as of April 19, 2024, and effective as of April 22, 2024 (the "Effective Date"). 250,000 of the shares subject to the 2024 RSUs vested on April 22, 2025, and the remaining 750,000 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, 333,333 shares subject to the 2024 RSUs were vested, and 666,667 shares are unvested.
F2	On May 1, 2024, the Reporting Person inadvertently filed a Form 3 that reported the RSUs. This filing serves to disclose the RSUs on a Form 4.
F3	The shares subject to the Restricted Stock Unit vest in equal increments on the last day of every month over 36 months, beginning on March 31, 2025, subject to the Reporting Person's continued employment with the Issuer on each vesting date.
F4	Under the Employment Agreement and subject to the terms of the Issuer's 2021 Equity Incentive Plan (the "Plan"), the Reporting Person was granted up 1,250,000 RSUs under the Plan, that vest pursuant to certain milestones set forth by the Issuer.