NPEH, LLC trims NET Power (NPWR) stake with 100K-share open-market sale

Rhea-AI Filing Summary

NPEH, LLC, a 10% owner of NET Power Inc., reported selling 100,000 shares of Class A common stock in an open-market transaction on March 3, 2026. After this sale, NPEH, LLC held 400,000 shares of NET Power Class A common stock.

The filing notes that the reported price reflects a weighted average, with the shares sold in multiple trades at prices ranging from $2.01 to $2.015 per share. This transaction represents a reduction, but not an exit, of NPEH, LLC’s position in NET Power.

Insights

Equity market analyst

10% owner NPEH, LLC modestly reduces its NET Power stake through open-market sales.

NPEH, LLC, identified as a 10% owner of NET Power Inc., sold 100,000 shares of Class A common stock in an open-market transaction on March 3, 2026. The filing states a post-transaction holding of 400,000 shares, so the seller retains a significant position.

The sales were executed across multiple trades at prices ranging from $2.01 to $2.015 per share, reported as a weighted average. This looks like portfolio rebalancing or liquidity-taking rather than a full exit, but the filing does not provide the seller’s rationale.

Overall, this appears as a routine insider sale by a large holder, without additional context such as pre-set trading plans or corporate events. Future company filings and ownership reports may show whether this reduction continues or stabilizes.

Insider Trade Summary

Net Seller: 100,000 shares ($204,250)

Net Sell 1 txn

Insider NPEH, LLC

Role 10% Owner

Sold 100,000 shs ($204K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	100,000	$2.0425	$204K

Holdings After Transaction: Class A Common Stock — 400,000 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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)
03/03/2026

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	03/03/2026		S		100,000	D	$2.0425(1)	400,000	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 $2.01 to $2.015 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	03/05/2026
	** 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.

FAQ

What insider transaction did NPEH, LLC report for NET Power (NPWR)?

NPEH, LLC reported selling 100,000 shares of NET Power Class A common stock in an open-market transaction. The sale occurred on March 3, 2026 and reduced its holdings to 400,000 shares after the trade, according to the Form 4 filing.

At what prices did NPEH, LLC sell NET Power (NPWR) shares in this Form 4?

The filing states that the reported price is a weighted average, with NET Power shares sold in multiple trades. These trades occurred at prices ranging from $2.01 to $2.015 per share, and NPEH, LLC offered to provide detailed trade breakdowns upon request.

How many NET Power (NPWR) shares does NPEH, LLC own after the reported sale?

After selling 100,000 shares of Class A common stock, NPEH, LLC is reported to own 400,000 NET Power Class A shares. This indicates that, despite the sale, NPEH, LLC continues to hold a sizeable equity position in the company.

What role does NPEH, LLC have in NET Power (NPWR) according to the Form 4?

NPEH, LLC is identified in the Form 4 as a ten percent owner of NET Power Inc. The entity is not listed as a director or officer, but its 10% holder status means its trades are subject to Section 16 insider reporting requirements.

Was the NPEH, LLC NET Power (NPWR) transaction a buy or a sell?

The transaction was a sale. The Form 4 classifies it as an open-market sale of 100,000 shares of NET Power Class A common stock by NPEH, LLC, with the transaction coded as a "Sale in open market or private transaction."

What does the weighted average price disclosure mean in the NPWR Form 4?

The weighted average disclosure means the 100,000 NET Power shares were sold in multiple individual trades at slightly different prices. NPEH, LLC reports an average ranging from $2.01 to $2.015 and offers to provide exact trade-by-trade details to interested parties.