Insider entity linked to NET Power (NPWR) sells 86,483 shares around $2

Rhea-AI Filing Summary

NET Power Inc. reported insider sales of Class A common stock by an entity associated with major holder 8 Rivers Capital, LLC. Through NPEH, LLC, a total of 86,483 shares were sold in open-market transactions at prices around $2.00–$2.05 per share over three days. After these sales, NPEH, LLC held 500,000 shares of Class A common stock indirectly. 8 Rivers and Damian R. Beauchamp each state that they may be deemed indirect beneficial owners only to the extent of their pecuniary interests and explicitly disclaim beneficial ownership beyond that.

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^*

8 Rivers Capital, 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)

	Form filed by One Reporting Person
X	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	I	By: NPEH, LLC(4)(5)
Class A Common Stock	02/27/2026		S		4,744	D	$2.0003(2)	579,858	I	By: NPEH, LLC(4)(5)
Class A Common Stock	03/02/2026		S		79,858	D	$2.0508(3)	500,000	I	By: NPEH, LLC(4)(5)

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

1. Name and Address of Reporting Person^*

8 Rivers Capital, LLC

(Last) (First) (Middle)

406 BLACKWELL STREET, 4TH FLOOR

(Street)

DURHAM NC 27701

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

BEAUCHAMP DAMIAN R.

(Last) (First) (Middle)

406 BLACKWELL STREET, 4TH FLOOR

(Street)

DURHAM NC 27701

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

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.

4. As manager and holder of approximately 90.9% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Rivers disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that 8 Rivers is the beneficial owner of such securities for purposes of Section 16 or otherwise.

5. Damian R. Beauchamp ("Mr. Beauchamp") independently indirectly owns approximately 63.72% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH to the extent of his pecuniary interest therein. Mr. Beauchamp disclaims beneficial ownership of any such securities, except to the extent of his or her pecuniary interest therein, if any, and this report shall not be deemed an admission that Mr. Beauchamp is the beneficial owner of such securities for purposes of Section 16 or otherwise.

	By: /s/ Min Lee, General Counsel of 8 Rivers Capital, LLC	03/02/2026
	By: /s/ Damian R. Beauchamp	03/02/2026
	** Signature of Reporting Person	Date
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FAQ

What insider transaction did NET Power Inc. (NPWR) report in this Form 4?

NET Power reported that NPEH, LLC, an entity associated with 8 Rivers Capital, sold 86,483 shares of Class A common stock in open-market trades around $2 per share, leaving NPEH, LLC with 500,000 shares held indirectly after the reported transactions.

On which dates did the NET Power (NPWR) insider entity sell shares and at what prices?

The insider entity sold shares on February 26, 2026, February 27, 2026, and March 2, 2026. Reported weighted average prices ranged from about $2.00 to $2.0508 per share, with trades occurring in multiple lots within those price ranges.

How many NET Power (NPWR) shares did the insider entity hold after these Form 4 sales?

After the reported transactions, NPEH, LLC held 500,000 shares of NET Power Class A common stock indirectly. This figure reflects the balance following open-market sales totaling 86,483 shares across three trading days, as disclosed in the Form 4 ownership information.

Who is reported as potentially benefiting from NET Power (NPWR) shares sold by NPEH, LLC?

The filing states 8 Rivers Capital, LLC may be deemed a beneficial owner of NPEH, LLC’s securities to the extent of its pecuniary interest. It also notes Damian R. Beauchamp may be deemed an indirect beneficial owner via his ownership interests in 8 Rivers.

Do 8 Rivers Capital and Damian R. Beauchamp fully acknowledge beneficial ownership of NET Power (NPWR) shares?

No. Both 8 Rivers Capital and Damian R. Beauchamp expressly disclaim beneficial ownership of the NET Power securities held by NPEH, LLC, except to the extent of their respective pecuniary interests, and state the report should not be viewed as an admission of beneficial ownership.

How were the NET Power (NPWR) insider sale prices determined and disclosed?

Each transaction’s price is reported as a weighted average sales price. The filing notes that individual trades occurred in multiple lots within disclosed ranges, and NPEH, LLC will provide full trade-by-trade price details to the SEC, issuer, or any security holder upon request.