NPEH LLC trims NET Power (NPWR) stake with 86,483-share sale

Rhea-AI Filing Summary

NPEH, LLC, a 10% owner of NET Power Inc., reported open‑market sales of a total of 86,483 shares of Class A Common Stock. The sales occurred on February 26, February 27, and March 2, 2026 at weighted average prices around $2.00–$2.05 per share.

After these transactions, NPEH, LLC directly held 500,000 shares of Class A Common Stock. The prices reported are weighted averages for multiple trades on each date, with detailed price breakdowns available from NPEH upon request.

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

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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)
02/26/2026

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	02/26/2026		S		1,881	D	$2(1)	584,602	D
Class A Common Stock	02/27/2026		S		4,744	D	$2.0003(2)	579,858	D
Class A Common Stock	03/02/2026		S		79,858	D	$2.0508(3)	500,000	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 a price of $2.00. 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 $2.00 to $2.005. 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 $2.00 to $2.10. 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	03/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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FAQ

What did NPEH, LLC report in this NET Power (NPWR) Form 4?

NPEH, LLC reported selling 86,483 shares of NET Power Class A Common Stock. The open-market sales took place over three days in late February and early March 2026 at weighted average prices near $2 per share.

How many NET Power (NPWR) shares did NPEH, LLC sell and at what prices?

NPEH, LLC sold 86,483 NET Power Class A shares. Reported weighted average prices were about $2.00, $2.0003, and $2.0508 per share, with actual trade prices ranging from $2.00 to $2.10, as disclosed in the transaction footnotes.

Over what dates did NPEH, LLC sell NET Power (NPWR) shares?

NPEH, LLC sold NET Power Class A shares on February 26, February 27, and March 2, 2026. Each day’s activity was reported separately, reflecting multiple trades aggregated into a single weighted average sale price per day.

How many NET Power (NPWR) shares does NPEH, LLC hold after these sales?

Following the reported transactions, NPEH, LLC directly held 500,000 shares of NET Power Class A Common Stock. This figure reflects the position after the March 2, 2026 sale, as shown in the post-transaction ownership column.

What do the weighted average prices mean in the NPEH, LLC NET Power (NPWR) filing?

The weighted average prices reflect that each day’s sales were executed in multiple trades at slightly different prices. Footnotes state trades ranged from $2.00 up to $2.10, and NPEH, LLC will provide exact per-trade details upon request.