[Form 4] NET Power Inc. Insider Trading Activity

Rhea-AI Filing Summary

NET Power Inc. (NPWR) disclosed insider sales by a reporting person identified as a Director. On 10/20/2025, the holder sold 201,000 Class A shares at a weighted average price of $3.5784, leaving 3,562,400 shares beneficially owned. On 10/21/2025, they sold 189,300 shares at a weighted average of $3.5307, leaving 3,373,100 shares. On 10/22/2025, they sold 89,000 shares at a weighted average of $3.3071, leaving 3,284,100 shares.

The prices reflect multiple trades within disclosed ranges for each date, and the reported ownership is listed as direct.

Insights

Securities disclosure analyst

Director reported three open-market sales with updated holdings.

The filing lists sales of Class A common stock across three consecutive days with weighted average prices and post-transaction holdings. Each day’s activity includes a share count sold and the remaining beneficial ownership, indicating the reporting person maintains a substantial direct position after the trades.

Prices were reported as weighted averages with specified intra-day ranges, a standard presentation when sales occur in multiple executions. The filing notes direct ownership and provides precise counts after each sale.

Without additional context on motivations or broader corporate developments, the market impact depends on holder decisions and future disclosures in periodic reports.

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^*

NPEH, LLC

(Last) (First) (Middle)

406 BLACKWELL STREET, 4TH FLOOR

(Street)

DURHAM NC 27701

(City) (State) (Zip)

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

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
Class A Common Stock	10/20/2025		S		201,000	D	$3.5784(1)	3,562,400	D
Class A Common Stock	10/21/2025		S		189,300	D	$3.5307(2)	3,373,100	D
Class A Common Stock	10/22/2025		S		89,000	D	$3.3071(3)	3,284,100	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 price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.51 to $3.72. NPEH, LLC ("NPEH") will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

2. The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.51 to $3.5775. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

3. The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $3.225 to $3.365. NPEH will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

	By: /s/ Min Lee, General Counsel of 8 Rivers Capital, LLC, its Manager	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 NPWR disclose?

A Director reported open-market sales of Class A common stock over three days with weighted average prices and updated direct holdings after each sale.

How many NPWR shares were sold on 10/20/2025 and at what price?

201,000 shares at a weighted average price of $3.5784; beneficial ownership after the sale was 3,562,400 shares.

What were the NPWR sales and prices on 10/21/2025?

Sold 189,300 shares at a weighted average of $3.5307; beneficial ownership was 3,373,100 shares after the transactions.

What were the NPWR sales and prices on 10/22/2025?

Sold 89,000 shares at a weighted average of $3.3071; beneficial ownership was 3,284,100 shares after the transactions.

Were the NPWR sales executed in multiple trades within price ranges?

Yes. Each date’s weighted average price reflects multiple trades within disclosed ranges, and detailed trade-by-trade data is available upon request as noted.

What is the ownership form reported for the NPWR shares?

The filing indicates direct ownership for the reported holdings.