[Form 4] 374Water Inc. Insider Trading Activity

Rhea-AI Filing Summary

Russell Kline, Chief Financial Officer of 374Water Inc. (SCWO), reported two open-market purchases of common stock. He acquired 15,000 shares on 08/21/2025 at a weighted average price of $0.2462, bringing his direct holdings to 383,642 shares. He purchased another 15,000 shares on 08/22/2025 at a weighted average price of $0.2496, increasing his direct holdings to 398,642 shares.

The Form 4 is signed by Mr. Kline on 08/25/2025 and lists his reporting address in Morrisville, North Carolina. Footnotes state each reported price is a weighted average of multiple transactions within the disclosed price ranges and that Mr. Kline will provide transaction-level detail to the company or SEC staff upon request.

Insights

Securities Analyst

TL;DR: Insider made small, consecutive open-market purchases increasing direct holdings modestly.

The filing discloses two separate purchases totaling 30,000 shares executed over two days at weighted average prices of $0.2462 and $0.2496. The transactions are reported as direct ownership increases and the reporting person is the company CFO. The filing contains customary footnote language clarifying weighted-average pricing ranges and the offer to provide detailed per-transaction pricing on request. From a trading-disclosure standpoint, the Form 4 appears complete and procedurally standard.

Corporate Governance Expert

TL;DR: Disclosure is standard and properly documents the CFO's beneficial ownership change.

The Form 4 identifies the reporting person, relationship to the issuer, transaction dates, share counts and weighted-average prices, and includes the required signature. Footnotes clarify the use of weighted averages and availability of detailed breakdowns. The report fulfills Section 16 reporting requirements by documenting the timing and size of open-market purchases by an officer.

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

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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)
08/21/2025

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	08/21/2025		P		15,000	A	$0.2462(1)	383,642	D
Common Stock	08/22/2025		P		15,000	A	$0.2496(2)	398,642	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 $0.2444 to $0.2493, 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.

2. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $0.2450 to $0.2519, 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 (2) to this Form 4.

	/s/ Russell Kline	08/25/2025
	** 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 transactions did SCWO CFO Russell Kline report?

Mr. Kline reported two open-market purchases: 15,000 shares on 08/21/2025 at a weighted average price of $0.2462 and 15,000 shares on 08/22/2025 at $0.2496.

How many shares does Russell Kline beneficially own after these transactions?

Following the 08/21/2025 purchase his direct holdings were 383,642 shares; after the 08/22/2025 purchase they increased to 398,642 shares.

When was the Form 4 signed and filed by the reporting person?

The Form 4 shows a signature by Russell Kline dated 08/25/2025.

Are the reported share prices exact per trade or averages?

Each reported price is a weighted average of multiple transactions; footnotes provide the price ranges and offer to supply per-transaction details on request.

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

The Form 4 identifies Russell Kline as an Officer, specifically the Chief Financial Officer of 374Water Inc.