Russell Kline - 21 Aug 2025 Form 4 Insider Report for 374Water Inc. (SCWO)

Role: Chief Financial Officer
Signature: /s/ Russell Kline
Issuer symbol: SCWO
Transactions as of: 21 Aug 2025
Net transactions value: +$7,437
Form type: 4
Filing time: 25 Aug 2025, 16:06:09 UTC
Previous filing: 21 Aug 2025
Next filing: 02 Sep 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Russell Kline	Chief Financial Officer	C/O 374 WATER INC., 100 SOUTHCENTER COURT, SUITE 200, MORRISVILLE	/s/ Russell Kline	25 Aug 2025	0002049257

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SCWO	Common Stock	Purchase	$3,693	+15,000	+4.1%	$0.2462	383,642	21 Aug 2025	Direct	F1
transaction	SCWO	Common Stock	Purchase	$3,744	+15,000	+3.9%	$0.2496	398,642	22 Aug 2025	Direct	F2

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

Explanation of Responses:

Id	Content
F1	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.
F2	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.

Content

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.

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.