374Water CFO granted RSUs and stock options

374Water Inc. reported that Chief Financial Officer Charles Maurice Weiser received new equity awards as part of his compensation.

Rhea-AI Filing Summary

374Water Inc. reported that Chief Financial Officer Charles Maurice Weiser received new equity awards as part of his compensation. He was granted 125,000 restricted stock units and stock options for 150,000 shares of common stock at an exercise price of $2.16 per share on July 1, 2026. Both the RSUs and options vest 25% on the grant date and the remaining 75% in 12 equal quarterly installments starting October 1, 2026, aligning his incentives with the company’s long-term performance.

Insider Trade Summary

Grant/Award: 275,000 shares

Grant/Award 2 txns

Insider Weiser Charles Maurice

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (right to buy)	150,000	$0.00	$0.00
Grant/Award	Restricted Stock Units	125,000	$0.00	$0.00

Holdings After Transaction: Stock Option (right to buy) — 150,000 contracts (Direct); Restricted Stock Units — 125,000 contracts (Direct)

Footnotes (2)

1. F1. The stock option was granted pursuant to the 374Water Inc. 2021 Equity Incentive Plan, as amended. The option vests as follows: 25% (37,500 shares) on the grant date (July 1, 2026), and the remaining 75% (112,500 shares) in 12 equal quarterly installments of 9,375 shares commencing October 1, 2026 (subject to a rounding adjustment on the final installment). The exercise price equals the closing price of the Issuer's common stock on the Nasdaq Capital Market on the date of grant.
2. F2. The restricted stock unit award was granted pursuant to the 374Water Inc. 2021 Equity Incentive Plan, as amended. The RSUs vest as follows: 25% (31,250 shares) on the grant date (July 1, 2026), and the remaining 75% (93,750 shares) in 12 equal quarterly installments of 7,813 shares commencing October 1, 2026 (subject to a rounding adjustment on the final installment to account for the aggregate total of 93,750 shares).

Key Figures

RSU grant size: 125,000 units Option grant size: 150,000 options Option exercise price: $2.16 per share +5 more

8 metrics

RSU grant size 125,000 units Restricted stock units granted to CFO on July 1, 2026

Option grant size 150,000 options Stock options granted to CFO on July 1, 2026

Option exercise price $2.16 per share Equal to closing price on grant date

RSU initial vesting 31,250 units 25% of RSUs vest on July 1, 2026

Option initial vesting 37,500 options 25% of options vest on July 1, 2026

Remaining RSU vesting 93,750 units Vest in 12 quarterly installments starting October 1, 2026

Remaining option vesting 112,500 options Vest in 12 quarterly installments starting October 1, 2026

Option expiration date July 1, 2036 Final date to exercise granted options

Key Terms

Restricted Stock Units, Stock Option, 2021 Equity Incentive Plan, exercise price, +1 more

5 terms

Restricted Stock Units financial

"The restricted stock unit award was granted pursuant to the 374Water Inc. 2021 Equity Incentive Plan, as amended."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Stock Option financial

"The stock option was granted pursuant to the 374Water Inc. 2021 Equity Incentive Plan, as amended."

A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.

2021 Equity Incentive Plan financial

"was granted pursuant to the 374Water Inc. 2021 Equity Incentive Plan, as amended."

exercise price financial

"The exercise price equals the closing price of the Issuer's common stock on the Nasdaq Capital Market on the date of grant."

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

vesting financial

"The RSUs vest as follows: 25% (31,250 shares) on the grant date, and the remaining 75% in 12 equal quarterly installments."

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What equity awards did 374Water (SCWO) grant to its CFO?

374Water granted CFO Charles Maurice Weiser 125,000 restricted stock units and stock options on 150,000 shares. These awards are part of his compensation and are tied to the company’s 2021 Equity Incentive Plan, aligning pay with long-term shareholder interests.

What is the exercise price of the new 374Water (SCWO) stock options?

The new stock options have an exercise price of $2.16 per share, equal to the closing price on the grant date. This means the options only have value if 374Water’s share price rises above $2.16 after vesting and before expiration.

How do the CFO’s new restricted stock units at 374Water (SCWO) vest?

The 125,000 restricted stock units vest 25% (31,250 shares) on July 1, 2026. The remaining 75% (93,750 shares) vest in 12 equal quarterly installments of 7,813 shares starting October 1, 2026, subject to a rounding adjustment on the final installment.

What is the vesting schedule for the new 374Water (SCWO) stock options?

The 150,000 stock options vest 25% (37,500 options) on July 1, 2026. The remaining 75% (112,500 options) vest in 12 equal quarterly installments of 9,375 options beginning October 1, 2026, with a rounding adjustment on the final installment if needed.

When do the new 374Water (SCWO) stock options granted to the CFO expire?

The stock options granted to the CFO on July 1, 2026 expire on July 1, 2036. He may choose to exercise vested options any time before expiration, subject to plan terms and company policies, if the share price exceeds the $2.16 exercise price.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 07/08/2026 - 04:34 PM Learn about SEC filing dates

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^*

Weiser Charles Maurice

(Last) (First) (Middle)

C/O 374WATER INC.

100 SOUTHCENTER COURT SUITE 200

(Street)

MORRISVILLE NORTH CAROLINA 27560

(City) (State) (Zip)

UNITED STATES

(Country)

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
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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

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
Stock Option (right to buy)	$2.16	07/01/2026		A		150,000(1)		07/01/2026	07/01/2036	Common Stock	150,000	$0	150,000	D
Restricted Stock Units	$0	07/01/2026		A		125,000(2)		07/01/2026	07/01/2029	Common Stock	125,000	$0	125,000	D

Explanation of Responses:

1. The stock option was granted pursuant to the 374Water Inc. 2021 Equity Incentive Plan, as amended. The option vests as follows: 25% (37,500 shares) on the grant date (July 1, 2026), and the remaining 75% (112,500 shares) in 12 equal quarterly installments of 9,375 shares commencing October 1, 2026 (subject to a rounding adjustment on the final installment). The exercise price equals the closing price of the Issuer's common stock on the Nasdaq Capital Market on the date of grant.

2. The restricted stock unit award was granted pursuant to the 374Water Inc. 2021 Equity Incentive Plan, as amended. The RSUs vest as follows: 25% (31,250 shares) on the grant date (July 1, 2026), and the remaining 75% (93,750 shares) in 12 equal quarterly installments of 7,813 shares commencing October 1, 2026 (subject to a rounding adjustment on the final installment to account for the aggregate total of 93,750 shares).

	/s/ Chuck Maurice Weiser	07/08/2026
	** 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.
* Form 4: SEC 1474 (03-26)