Net Power holder NPEH sells 150,745 shares

NPEH, LLC, a 10% owner of Net Power Inc., reported selling a total of 150,745 shares of Class A Common Stock over three days in August 2026.

Rhea-AI Filing Summary

NPEH, LLC, a 10% owner of Net Power Inc., reported selling a total of 150,745 shares of Class A Common Stock over three days in August 2026. The sales comprised 60,345 shares on August 7 at a weighted average price of $1.5259, 55,400 shares on August 10 at $1.5537, and 35,000 shares on August 11 at $1.5997. Each transaction was executed as multiple trades within stated price ranges.

Insider Trade Summary

Net Seller: 150,745 shares

Net Sell 3 txns

Insider NPEH, LLC

Role 10% Owner

Sold 150,745 shs ($234K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F3	35,000	$1.5997	$56K
Sale	Class A Common Stock F2	55,400	$1.5537	$86K
Sale	Class A Common Stock F1	60,345	$1.5259	$92K

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

Footnotes (3)

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 $1.50 to $1.55. 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. F2. 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 $1.525 to $1.57. 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. F3. 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 $1.54 to $1.625. 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.

Key Figures

Total shares sold: 150,745 shares Shares sold on 2026-08-07: 60,345 shares Weighted average price on 2026-08-07: $1.5259 per share +4 more

7 metrics

Total shares sold 150,745 shares Aggregate net shares sold across reported transactions

Shares sold on 2026-08-07 60,345 shares Class A Common Stock sold by NPEH, LLC

Weighted average price on 2026-08-07 $1.5259 per share Weighted average sales price with trades from $1.50 to $1.55

Shares sold on 2026-08-10 55,400 shares Class A Common Stock sold by NPEH, LLC

Weighted average price on 2026-08-10 $1.5537 per share Weighted average sales price with trades from $1.525 to $1.57

Shares sold on 2026-08-11 35,000 shares Class A Common Stock sold by NPEH, LLC

Weighted average price on 2026-08-11 $1.5997 per share Weighted average sales price with trades from $1.54 to $1.625

Key Terms

weighted average sales price, multiple trades, Class A Common Stock, open market or private transaction

4 terms

weighted average sales price financial

"The price reported reflects the weighted average sales price."

multiple trades financial

"The shares of Class A Common Stock were sold in multiple trades at prices"

Class A Common Stock financial

"The shares of Class A Common Stock were sold in multiple trades"

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

open market or private transaction financial

"Sale in open market or private transaction"

FAQ

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

What insider activity did NPEH, LLC report for Net Power Inc. (NPWR)?

NPEH, LLC reported selling 150,745 shares of Net Power Inc. Class A Common Stock over three days in August 2026. The transactions were open-market sales at weighted average prices between roughly $1.53 and $1.60 per share, executed in multiple trades.

How many NPWR shares did NPEH, LLC sell on each reported date?

NPEH, LLC sold 60,345 shares on August 7, 55,400 shares on August 10, and 35,000 shares on August 11, 2026. All sales involved Net Power Inc. Class A Common Stock in multiple trades at various prices on each date.

What prices did NPEH, LLC receive for its NPWR share sales?

The reported weighted average prices were $1.5259 on August 7, $1.5537 on August 10, and $1.5997 on August 11, 2026. Footnotes state the shares were sold in multiple trades within specified price ranges around each average.

Were NPEH, LLC’s NPWR transactions single trades or aggregated trades?

Each reported Net Power Inc. transaction reflects a weighted average sales price for multiple trades. Footnotes explain the Class A Common Stock was sold in numerous trades within stated price ranges, and detailed per-trade data is available upon request.

Does the filing state NPEH, LLC still holds NPWR shares after these sales?

The transactions report shares sold and prices but do not specify shares held after the sales. The post-transaction share fields are not completed, so remaining ownership amounts are not detailed in this disclosure.

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

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Accepted by SEC EDGAR 08/11/2026 - 06:00 PM EDT 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 NORTH CAROLINA 27701

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/07/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	08/07/2026		S		60,345	D	$1.5259(1)	2,090,400	D
Class A Common Stock	08/10/2026		S		55,400	D	$1.5537(2)	2,035,000	D
Class A Common Stock	08/11/2026		S		35,000	D	$1.5997(3)	2,000,000	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 $1.50 to $1.55. 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 $1.525 to $1.57. 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 $1.54 to $1.625. 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	08/11/2026
	** 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.
* Form 4: SEC 1474 (03-26)