[Form 4] 374Water Inc. Insider Trading Activity

Rhea-AI Filing Summary

374Water Inc. (SCWO) reporting person Russell Kline, who is identified as an officer (Chief Financial Officer), purchased 20,000 shares of the company's common stock on 08/20/2025 at a weighted average price of $0.239 per share. After the purchases, Mr. Kline beneficially owns 368,642 shares. The filing discloses the purchase occurred in multiple trades at prices ranging from $0.2368 to $0.2416, and the reporting person offers to provide a breakdown of quantities at each price on request.

Positive

• Officer purchase of shares can signal insider confidence in the company's prospects
• Transparent pricing disclosure with a weighted average and range ($0.2368–$0.2416) and offer to provide trade-level details

Negative

• Size unclear relative to total shares outstanding, so materiality to investors is unknown
• No additional context such as total outstanding shares or market capitalization to assess impact

Insights

Financial Analyst

TL;DR: CFO bought 20,000 shares at a low price, modestly increasing insider ownership but not clearly material to valuation.

The purchase of 20,000 shares by the Chief Financial Officer increases his stake to 368,642 shares and signals insider buying, which can be interpreted positively by the market. The weighted average purchase price of $0.239 and the disclosed trade range indicate small, incremental purchases rather than a single large block trade. Without context on outstanding shares or market capitalization, the transaction's impact on valuation or control is unclear. This is a routine Section 16 disclosure consistent with internal buying activity.

Corporate Governance Expert

TL;DR: Insider purchase by an officer shows alignment but lacks size context to be governance-material.

Russell Kline is identified as the Chief Financial Officer and the Form 4 documents open-market purchases totaling 20,000 shares at a disclosed weighted average price. Insider purchases by senior officers may reflect confidence in the company, but governance materiality depends on stake size relative to total outstanding shares and any concurrent corporate actions. The filing includes the required offer to provide trade-level detail, which supports transparency and compliance with Section 16 reporting obligations.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Russell Kline

(Last) (First) (Middle)

C/O 374 WATER INC.

100 SOUTHCENTER COURT, SUITE 200

(Street)

MORRISVILLE NC 27560

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
374Water Inc. [ SCWO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

3. Date of Earliest Transaction (Month/Day/Year)
08/20/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/20/2025		P		20,000	A	$0.239(1)	368,642	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $0.2368 to $0.2416, inclusive. The reporting person undertakes to provide to 374Water Inc., any security holder of 374Water Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in footnote (1) to this Form 4.

	/s/ Russell Kline	08/21/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Russell Kline report for SCWO?

The filing reports Mr. Kline purchased 20,000 shares of 374Water Inc. common stock on 08/20/2025 at a weighted average price of $0.239 per share.

What is Russell Kline's role at 374Water Inc. (SCWO)?

The Form 4 identifies Russell Kline as an Officer with the title Chief Financial Officer.

How many shares does Russell Kline beneficially own after the reported transaction?

After the reported purchase, Mr. Kline beneficially owns 368,642 shares.

At what price range were the SCWO shares purchased?

The shares were purchased in multiple transactions at prices ranging from $0.2368 to $0.2416, with a weighted average of $0.239.

Does the Form 4 provide breakdowns of each trade price and quantity?

The filing states the reporting person will provide, upon request, full information regarding the number of shares purchased at each separate price within the disclosed range.