[Form 4] 374Water Inc. Insider Trading Activity

Rhea-AI Filing Summary

374Water (SCWO) disclosed insider share sales by a reporting person identified as a 10% owner. On 10/20/2025, the holder sold 13,330 shares of common stock at a weighted‑average price of $0.4208; on 10/21/2025, 284,394 shares at $0.4204; and on 10/22/2025, 32,791 shares at $0.4209.

After these transactions, the reporting person beneficially owned 32,646,843 shares, held directly. Each day’s sale was executed in multiple trades within stated price ranges: $0.4202–$0.4211, $0.420–$0.4208, and $0.4207–$0.4210, respectively.

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^*

Nagar Yaacov

(Last) (First) (Middle)

600 PARK OFFICES DR.

SUITE 300

(Street)

DURHAM NC 27713

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

3. Date of Earliest Transaction (Month/Day/Year)
10/20/2025

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	10/20/2025		S		13,330	D	$0.4208(1)	32,964,028	D
Common Stock	10/21/2025		S		284,394	D	$0.4204(2)	32,679,634	D
Common Stock	10/22/2025		S		32,791	D	$0.4209(3)	32,646,843	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. This transaction was executed in multiple trades at prices ranging from $0.4202 to $0.4211 The price set forth above reflects the weighted-average price per share. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

2. This transaction was executed in multiple trades at prices ranging from $0.420 to $0.4208 The price set forth above reflects the weighted-average price per share. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

3. This transaction was executed in multiple trades at prices ranging from $0.4207 to $0.4210 The price set forth above reflects the weighted-average price per share. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

	/s/ YAACOV NAGAR	10/22/2025
	** 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 activity did 374Water (SCWO) report?

A 10% owner reported sales of 13,330 shares on 10/20/2025, 284,394 shares on 10/21/2025, and 32,791 shares on 10/22/2025.

What prices were received in the SCWO insider sales?

Weighted‑average prices were $0.4208 (10/20), $0.4204 (10/21), and $0.4209 (10/22), each from multiple trades within disclosed ranges.

How many SCWO shares does the reporting person now hold?

Following the reported transactions, the reporting person beneficially owned 32,646,843 shares, held directly.

Were the insider trades executed in multiple transactions?

Yes. The filing states each day’s sale was executed in multiple trades within ranges of $0.4202–$0.4211, $0.420–$0.4208, and $0.4207–$0.4210.

What type of security was sold in the SCWO insider transactions?

The reported transactions involved Common Stock of 374Water Inc.

Is there any derivative security activity reported?

No derivative security transactions are listed in the provided excerpt of Table II.