Stephen J. Jones - 07 Oct 2025 Form 4 Insider Report for 374Water Inc. (SCWO)

Role: Interim CEO, Director
Signature: /s/ Stephen Jones
Issuer symbol: SCWO
Transactions as of: 07 Oct 2025
Net transactions value: $0
Form type: 4
Filing time: 09 Oct 2025, 17:11:30 UTC
Previous filing: 03 Sep 2025
Next filing: 17 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Jones Stephen J	Interim CEO, Director	C/O 374 WATER INC., 100 SOUTHCENTER COURT SUITE 200, MORRISVILLE	/s/ Stephen Jones	09 Oct 2025	0001412239

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	Stock options (right to buy)	Award	$0	+4,500,000		$0.000000	4,500,000	07 Oct 2025	Common Stock	4,500,000	$0.3700	Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	Represents stock options granted to the Reporting Person as compensation in connection with his appointment as Interim Chief Executive Officer of 374Water Inc. (the "Company"). The vesting commencement date of the stock options is October 7, 2025. 25% of the stock options vest and become exercisable on the vesting commencement date, 25% of the stock options vest and become exercisable 90 days after the vesting commencement date, 25% of the stock options vest and become exercisable 180 days after the vesting commencement date and 25% of the stock options vest and become exercisable 270 days after the vesting commencement date, subject to the Reporting Person's continuing service through each vesting date. (Continues in footnote no. 2)
F2	Notwithstanding the foregoing, the stock options will vest and become exercisable immediately in the event of (i) a change of control of the Company, (ii) the hiring of a full-time Chief Executive Officer for the Company, or (iii) the termination of the Reporting Person other than for cause. Upon vesting, each stock option gives the Reporting Person the right to purchase one share of the Company's Common Stock at the exercise price. The stock options expire on the date which is ten years from the date on which the applicable shares vest, unless earlier terminated in accordance with the stock option grant agreement.

Content

Represents stock options granted to the Reporting Person as compensation in connection with his appointment as Interim Chief Executive Officer of 374Water Inc. (the "Company"). The vesting commencement date of the stock options is October 7, 2025. 25% of the stock options vest and become exercisable on the vesting commencement date, 25% of the stock options vest and become exercisable 90 days after the vesting commencement date, 25% of the stock options vest and become exercisable 180 days after the vesting commencement date and 25% of the stock options vest and become exercisable 270 days after the vesting commencement date, subject to the Reporting Person's continuing service through each vesting date. (Continues in footnote no. 2)

Notwithstanding the foregoing, the stock options will vest and become exercisable immediately in the event of (i) a change of control of the Company, (ii) the hiring of a full-time Chief Executive Officer for the Company, or (iii) the termination of the Reporting Person other than for cause. Upon vesting, each stock option gives the Reporting Person the right to purchase one share of the Company's Common Stock at the exercise price. The stock options expire on the date which is ten years from the date on which the applicable shares vest, unless earlier terminated in accordance with the stock option grant agreement.