NPEH, LLC trims NET Power (NYSE: NPWR) stake with 500,000-share sale

Rhea-AI Filing Summary

NPEH, LLC, a 10% owner of NET Power Inc., reported open-market sales of the company’s Class A common stock over three consecutive days in January 2026.

The entity sold 135,000 shares on January 14, 2026 at a weighted average price of $2.7379, 135,000 shares on January 15, 2026 at a weighted average price of $2.5718, and 230,000 shares on January 16, 2026 at a weighted average price of $2.6325. In total, NPEH, LLC sold 500,000 shares and reported owning 1,550,000 shares of Class A common stock directly after the final transaction.

Each price represents a weighted average across multiple trades within the stated intraday price ranges, and NPEH, LLC has indicated it will provide full trade details upon request to regulators, the issuer, or its security holders.

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)
01/14/2026

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	01/14/2026		S		135,000	D	$2.7379(1)	1,915,000	D
Class A Common Stock	01/15/2026		S		135,000	D	$2.5718(2)	1,780,000	D
Class A Common Stock	01/16/2026		S		230,000	D	$2.6325(3)	1,550,000	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 prices ranging from $2.725 to $2.755. 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 $2.50 to $2.77. 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 $2.535 to $2.705. 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	01/16/2026
	** 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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FAQ

Who reported the insider transactions in NET Power Inc. (NPWR)?

The reporting person is NPEH, LLC, which is identified as a 10% owner of NET Power Inc. on the Form 4.

How many NET Power (NPWR) shares did NPEH, LLC sell in this Form 4?

NPEH, LLC reported selling a total of 500,000 shares of NET Power’s Class A common stock across three days: 135,000 shares on January 14, 135,000 shares on January 15, and 230,000 shares on January 16, 2026.

At what prices were the NET Power (NPWR) shares sold by NPEH, LLC?

The sales were executed at weighted average prices of $2.7379 on January 14, $2.5718 on January 15, and $2.6325 on January 16, 2026. Each figure reflects a weighted average across multiple trades within stated price ranges.

How many NET Power (NPWR) shares does NPEH, LLC own after these transactions?

Following the reported sales, NPEH, LLC reported beneficial ownership of 1,550,000 shares of NET Power’s Class A common stock, held directly.

What do the weighted average price footnotes mean in this NET Power (NPWR) Form 4?

The footnotes state that each reported price is a weighted average of multiple trades executed within specified price ranges on the transaction date. NPEH, LLC has indicated it will provide detailed trade-by-trade information, including the number of shares sold at each price, upon request to the SEC, NET Power, or a security holder.

Does this NET Power (NPWR) Form 4 involve any derivative securities?

No derivative securities are reported in Table II. The filing lists only non-derivative transactions in Class A common stock for the disclosed dates.