[Form 4] 374Water Inc. Insider Trading Activity

Rhea-AI Filing Summary

James Michael Vanderhider, a director of 374Water Inc. (SCWO), reported acquisitions of restricted stock units and indirect holdings. He was granted 130,000 RSUs that fully vested on 08/28/2025 and 426,130 RSUs that vest 100% on 08/28/2026 (subject to continued service). After these reported transactions the filing shows 596,130 shares beneficially owned directly. Additionally, the filing discloses 1,420,000 shares held indirectly by Aspen View LP, over which Vanderhider has sole voting and dispositive power. The filing was signed by an attorney-in-fact on 09/02/2025.

Positive

• Material direct equity accumulation: Reporting person received 556,130 RSUs (130,000 vested and 426,130 subject to one-year vesting), increasing direct ownership.
• Significant alignment with shareholders: Combined direct holdings and indirect control total 2,016,130 shares, aligning the director's economic interests with company performance.

Negative

• Concentrated voting power: The reporting person has sole voting and dispositive power over Aspen View LP's 1,420,000 shares, creating concentrated insider control.
• Lack of disposition activity: No sales or diversification reported, which may limit liquidity or risk management for the insider.

Insights

Financial Analyst

TL;DR: Director acquired a material number of RSUs and retains significant indirect holdings, increasing his economic and voting exposure to SCWO.

The reported grants total 556,130 RSUs with 130,000 immediately vested and 426,130 cliff-vesting in one year, which raises the director's direct stake to 596,130 shares post-transaction. Combined with 1,420,000 shares controlled via Aspen View LP, the director has meaningful alignment with equity performance and substantial voting influence. For investors, these moves signal retention incentives and concentrated insider ownership; monitor potential dilution if additional grants or exercises occur.

Corporate Governance Expert

TL;DR: Significant indirect holdings and new RSU grants strengthen insider control but raise governance concentration considerations.

The filing confirms sole voting and dispositive power over Aspen View LP's 1,420,000 shares, which together with newly reported direct holdings increases insider control. The immediate vesting of 130,000 RSUs and time-based vest of 426,130 RSUs are typical retention mechanisms, but the combination of direct and indirect ownership warrants disclosure clarity on related-party arrangements and potential conflicts. No sales or dispositions are reported.

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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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^*

Vanderhider James Michael

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
08/28/2025

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 (restricted stock units)	08/28/2025		A		130,000(1)	A	$0	170,000	D
Common Stock (restricted stock units)	08/28/2025		A		426,130(2)	A	$0	596,130	D
Common Stock								1,420,000	I	See Footnote(3)

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. Fully vested on date of grant.

2. 100% of the shares vest on August 28, 2026, subject to the Reporting Person's continuous service through such date

3. All 1,420,000 shares are owned and held by Aspen View LP. The Reporting Person has sole voting and dispositive power over the securities held by Aspen View LP.

	/s/ Peter Mandel, Attorney-in-fact	09/02/2025
	** 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 RSU grants did SCWO director James Michael Vanderhider report on Form 4?

The Form 4 reports grants of 130,000 RSUs that fully vested on 08/28/2025 and 426,130 RSUs that vest 100% on 08/28/2026, subject to continued service.

How many SCWO shares does Vanderhider beneficially own after the reported transactions?

After the reported transactions the filing shows 596,130 shares beneficially owned directly and an additional 1,420,000 shares indirectly via Aspen View LP.

Does Vanderhider have voting control over the indirect SCWO shares?

Yes. The filing states the Reporting Person has sole voting and dispositive power over the securities held by Aspen View LP.

Were any SCWO shares sold or disposed of in this Form 4?

No. The transactions reported are acquisitions of restricted stock units; there are no sales or dispositions disclosed in this filing.

When was the Form 4 signed and filed for SCWO insider activity?

The signature block shows the form was signed by an attorney-in-fact on 09/02/2025.