Net Power director granted 71,770 RSUs

Net Power Inc. (NPWR) reported that director Carol R. Peterson received a grant of 71,770 Restricted Stock Units effective June 3, 2026, under the company’s Non-Employee Director Compensation Policy.

Rhea-AI Filing Summary

Net Power Inc. (NPWR) reported that director Carol R. Peterson received a grant of 71,770 Restricted Stock Units effective June 3, 2026, under the company’s Non-Employee Director Compensation Policy. Each unit will convert into one share of Class A common stock, vesting on the earlier of the day immediately preceding the 2027 annual stockholder meeting or June 3, 2027, subject to continued board service. Settlement of these units is deferred under Peterson’s standing deferral election, and her direct holdings after the grant total 176,151 shares/units. The company disclosed that this Form 4 was filed late due to administrative oversight.

Insider Trade Summary

Grant/Award: 71,770 shares

Grant/Award 1 txn

Insider PETERSON CAROL R.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units F1	71,770	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 176,151 shares (Direct)

Footnotes (1)

1. F1. The restricted stock units reported in this Form 4 were granted effective June 3, 2026, the date of the Issuer's 2026 annual meeting of stockholders, pursuant to the Issuer's Non-Employee Director Compensation Policy, which provides, among other things, for an automatic annual grant of restricted stock units to eligible non-employee directors. Each restricted stock unit represents the right to receive one share of Class A common stock. The restricted stock units vest on the earlier of the day immediately preceding the date of the Issuer's 2027 annual meeting of stockholders and June 3, 2027, subject to continued service as a director. Settlement of the restricted stock units is deferred pursuant to the reporting person's standing deferral election. Due to administrative oversight, this Form 4 is being filed late.

Key Figures

Restricted Stock Units granted: 71,770 units Price per RSU: $0.00 per unit Total holdings after transaction: 176,151 shares/units +2 more

5 metrics

Restricted Stock Units granted 71,770 units Grant to director Carol R. Peterson effective June 3, 2026

Price per RSU $0.00 per unit Compensation-related RSU award, not a market purchase

Total holdings after transaction 176,151 shares/units Direct ownership reported after the June 3, 2026 grant

RSU vesting date Earlier of day before 2027 annual meeting or June 3, 2027 Vesting schedule for the 71,770 RSUs, subject to continued service

Form 4 timeliness note Filed late Footnote cites administrative oversight as the reason

Key Terms

Restricted Stock Units, Non-Employee Director Compensation Policy, Class A common stock, deferral election

4 terms

Restricted Stock Units financial

"The restricted stock units reported in this Form 4 were granted effective"

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.

Non-Employee Director Compensation Policy financial

"pursuant to the Issuer's Non-Employee Director Compensation Policy"

Class A common stock financial

"Each restricted stock unit represents the right to receive one share of Class A"

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

deferral election financial

"Settlement of the restricted stock units is deferred pursuant to the reporting"

FAQ

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

What insider transaction did NPWR report for Carol R. Peterson?

Net Power Inc. reported that director Carol R. Peterson received a grant of 71,770 Restricted Stock Units on June 3, 2026, as part of the company’s Non-Employee Director Compensation Policy. Each RSU represents the right to receive one share of Class A common stock.

When do Carol R. Peterson’s new NPWR RSUs vest?

The 71,770 Restricted Stock Units vest on the earlier of the day immediately preceding Net Power’s 2027 annual meeting of stockholders and June 3, 2027, subject to Carol R. Peterson’s continued service as a director.

How many NPWR shares/units does Carol R. Peterson hold after this Form 4?

Following the June 3, 2026 grant, Carol R. Peterson’s direct holdings are reported as 176,151 shares/units of Net Power Inc. Class A common stock and related equity awards.

What is the price per share for Carol R. Peterson’s NPWR RSU grant?

The Form 4 reports a transaction price of $0.00 per unit for the grant of 71,770 Restricted Stock Units to Carol R. Peterson, consistent with a compensation-related award rather than a market purchase.

Is settlement of Carol R. Peterson’s NPWR RSUs immediate?

No. The filing states that settlement of the 71,770 Restricted Stock Units is deferred under Carol R. Peterson’s standing deferral election, so she will receive the underlying Class A shares at a later time in accordance with that election.

Why was this NPWR Form 4 filed late?

The footnote explains that, due to administrative oversight, this Form 4 reporting Carol R. Peterson’s June 3, 2026 Restricted Stock Unit grant was filed late.

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

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Available on EDGAR 08/31/2026 - 07:34 AM EDT Accepted by SEC EDGAR 08/31/2026 - 07:34 AM EDT 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^*

PETERSON CAROL R.

(Last) (First) (Middle)

C/O NET POWER INC.

11700 KATY FREEWAY, SUITE 700

(Street)

HOUSTON TEXAS 77079

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Net Power Inc. [ NPWR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/03/2026

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
Restricted Stock Units	06/03/2026		A		71,770(1)	A	$0	176,151	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. The restricted stock units reported in this Form 4 were granted effective June 3, 2026, the date of the Issuer's 2026 annual meeting of stockholders, pursuant to the Issuer's Non-Employee Director Compensation Policy, which provides, among other things, for an automatic annual grant of restricted stock units to eligible non-employee directors. Each restricted stock unit represents the right to receive one share of Class A common stock. The restricted stock units vest on the earlier of the day immediately preceding the date of the Issuer's 2027 annual meeting of stockholders and June 3, 2027, subject to continued service as a director. Settlement of the restricted stock units is deferred pursuant to the reporting person's standing deferral election. Due to administrative oversight, this Form 4 is being filed late.

Remarks:

	/s/ Ron Rucker, attorney-in-fact	08/28/2026
	** 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)