NPEH, LLC Sells 170,000 NET Power Shares at $2.21 Avg Price

NPEH, LLC, a reporting person for NET Power Inc. (NPWR), disclosed a sale of Class A common stock.

Rhea-AI Filing Summary

NPEH, LLC, a reporting person for NET Power Inc. (NPWR), disclosed a sale of Class A common stock. On 12/24/2025, NPEH sold 170,000 shares in an open-market transaction coded as a sale. The weighted average sales price was $2.2096 per share, with individual trades executed between $2.18 and $2.27 per share. After this transaction, NPEH reported beneficial ownership of 2,050,000 shares of NET Power Class A common stock held directly.

Insights

Equity ownership analyst

Routine Form 4 showing a modest share sale and remaining large stake.

This filing shows that NPEH, LLC, a reporting person for NET Power Inc. (NPWR), sold 170,000 shares of Class A common stock on 12/24/2025. The transaction is coded as a sale, with a weighted average price of $2.2096 per share and individual trades between $2.18 and $2.27 per share.

Following the sale, NPEH reported beneficial ownership of 2,050,000 NET Power Class A shares held directly. The filing notes that NPEH will provide full trade-level pricing details on request, which is standard language when a weighted average price is reported. Overall, this looks like a routine ownership adjustment rather than a transformative event.

Insider Trade Summary

Net Seller: 170,000 shares

Net Sell 1 txn

Insider NPEH, LLC

Role 10% Owner

Sold 170,000 shs ($376K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	170,000	$2.2096	$376K

Holdings After Transaction: Class A Common Stock — 2,050,000 shares (Direct)

Footnotes (1)

1. F1. 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 $2.18 to $2.27. 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.

FAQ

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

What insider transaction did NPWR report in this Form 4 filing?

The filing reports that NPEH, LLC sold 170,000 shares of NET Power Inc. Class A common stock in a transaction dated 12/24/2025.

What price did NPEH, LLC receive for the NET Power (NPWR) shares sold?

The filing lists a weighted average sales price of $2.2096 per share, with the shares sold in multiple trades at prices ranging from $2.18 to $2.27.

How many NET Power (NPWR) shares does NPEH, LLC own after this transaction?

After the reported sale, NPEH, LLC beneficially owns 2,050,000 shares of NET Power Inc. Class A common stock, held directly.

What type of security did the NPWR insider sale involve?

The transaction involved Class A Common Stock of NET Power Inc., as shown in Table I for non-derivative securities.

Was this NET Power (NPWR) insider trade reported as a purchase or a sale?

It was reported with transaction code S, indicating a sale of 170,000 shares of Class A common stock.

Does the filing provide details about the different trade prices for the NPWR shares?

Yes. It explains that the shares were sold in multiple trades between $2.18 and $2.27, and states that NPEH, LLC will provide full information on the number of shares sold at each price upon request.

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

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Accepted by SEC EDGAR 12/29/2025 - 07:49 PM EST 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^*

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)
12/24/2025

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	12/24/2025		S		170,000	D	$2.2096(1)	2,050,000	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 $2.18 to $2.27. 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.

	By: /s/ Min Lee, General Counsel of 8 Rivers Capital, LLC, its Manager	12/29/2025
	** 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.