374Water Inc. (SCWO) CFO increases holdings with 20,000-share stock purchase

Rhea-AI Filing Summary

374Water Inc.'s chief financial officer reports a personal stock purchase. On December 16, 2025, the CFO acquired 20,000 shares of 374Water Inc. common stock at a price of $0.22 per share. After this transaction, the officer directly holds 668,642 shares of the company’s common stock. This filing reflects an insider increasing their direct ownership stake in the company.

Insider Trade Summary

Net Buyer: 20,000 shares

Net Buy 1 txn

Insider Russell Kline

Role Chief Financial Officer

Bought 20,000 shs ($4K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	20,000	$0.22	$4K

Holdings After Transaction: Common Stock — 668,642 shares (Direct)

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 12/18/2025 - 05:25 PM Learn about SEC filing dates

FAQ

What insider transaction did 374Water Inc. (SCWO) disclose in this filing?

The chief financial officer of 374Water Inc. reported buying 20,000 shares of the company's common stock on December 16, 2025.

At what price did the 374Water Inc. (SCWO) CFO buy shares?

The CFO purchased the 20,000 common shares of 374Water Inc. at a price of $0.22 per share.

How many 374Water Inc. (SCWO) shares does the CFO own after this transaction?

Following the reported transaction, the chief financial officer directly owns 668,642 shares of 374Water Inc. common stock.

What is the role of the reporting person in 374Water Inc. (SCWO)?

The reporting person in this filing is an officer of 374Water Inc., serving as the company's Chief Financial Officer.

Was this 374Water Inc. (SCWO) insider transaction in common or derivative securities?

The reported transaction involved common stock of 374Water Inc.. The section for derivative securities did not list any transactions.

Is the 374Water Inc. (SCWO) insider transaction a direct or indirect holding?

The 668,642 shares of common stock reported after the transaction are held in a direct ownership form by the chief financial 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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
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)
12/16/2025

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	12/16/2025		P		20,000	A	$0.22	668,642	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:

	/s/ Russell Kline	12/18/2025
	** 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.