Net Power insider sells 242,900 shares at ~$1.91

Net Power Inc. (NPWR) had insider-related entities report open-market sales of its Class A Common Stock.

Rhea-AI Filing Summary

Net Power Inc. (NPWR) had insider-related entities report open-market sales of its Class A Common Stock. On August 25 and 26, 2026, NPEH, LLC sold a total of 242,900 shares at weighted average prices of $1.9065 and $1.9124 per share, respectively. The sales are reported by 8 Rivers Capital, LLC and Damian R. Beauchamp as indirect transactions, with both parties stating they may be deemed beneficial owners only to the extent of their pecuniary interests and expressly disclaiming broader beneficial ownership.

Insider Trade Summary

Net Seller: 242,900 shares

Net Sell 2 txns

Insider 8 Rivers Capital, LLC, BEAUCHAMP DAMIAN R.

Role 10% Owner | 10% Owner

Sold 242,900 shs ($463K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F2, F3, F4	41,350	$1.9124	$79K
Sale	Class A Common Stock F1, F3, F4	201,550	$1.9065	$384K

Holdings After Transaction: Class A Common Stock — 1,000,000 shares (Indirect, By: NPEH, LLC)

Footnotes (4)

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 $1.84 to $2.0091. 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 $1.82 to $1.985. 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. 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.
4. F4. Damian R. Beauchamp ("Mr. Beauchamp") independently indirectly owns approximately 63.70% 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.

Key Figures

Shares sold on 2026-08-25: 201,550 shares of Class A Common Stock Weighted average price on 2026-08-25: $1.9065 per share Shares sold on 2026-08-26: 41,350 shares of Class A Common Stock +5 more

8 metrics

Shares sold on 2026-08-25 201,550 shares of Class A Common Stock Indirect sale by NPEH, LLC reported by 8 Rivers Capital, LLC and Damian R. Beauchamp

Weighted average price on 2026-08-25 $1.9065 per share Multiple trades between $1.84 and $2.0091 per share

Shares sold on 2026-08-26 41,350 shares of Class A Common Stock Indirect sale by NPEH, LLC

Weighted average price on 2026-08-26 $1.9124 per share Multiple trades between $1.82 and $1.985 per share

Total shares sold across reported transactions 242,900 shares of Class A Common Stock Sum of indirect sales by NPEH, LLC on August 25–26, 2026

8 Rivers equity interest in NPEH Approximately 90.9% Manager and equity holder in NPEH, LLC, which directly owns the shares

Damian R. Beauchamp’s indirect interest in 8 Rivers Approximately 63.70% Indirect ownership of 8 Rivers Capital, LLC equity

Damian R. Beauchamp’s direct interest in 8 Rivers Approximately 3.83% Direct ownership of 8 Rivers Capital, LLC equity

Key Terms

weighted average sales price, beneficial owner, pecuniary interest, indirect beneficial owner

4 terms

weighted average sales price financial

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

beneficial owner financial

"may be deemed to be a beneficial owner of the securities"

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

pecuniary interest financial

"disclaims beneficial ownership ... except to the extent of its pecuniary interest"

indirect beneficial owner financial

"may be deemed the indirect beneficial owner of the securities"

FAQ

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

What insider transactions in NPWR stock did 8 Rivers Capital, LLC report?

8 Rivers Capital, LLC reported indirect sales through NPEH, LLC totaling 242,900 shares of Net Power Inc. Class A Common Stock on August 25–26, 2026, at weighted average prices of $1.9065 and $1.9124 per share, in open-market or private transactions.

How many NPWR shares were sold on August 25, 2026, and at what price?

On August 25, 2026, NPEH, LLC sold 201,550 shares of Net Power Inc. Class A Common Stock at a $1.9065 weighted average price per share, in multiple trades with prices ranging from $1.84 to $2.0091.

How many NPWR shares were sold on August 26, 2026, and at what price?

On August 26, 2026, NPEH, LLC sold 41,350 shares of Net Power Inc. Class A Common Stock at a $1.9124 weighted average price per share, in multiple trades with prices ranging from $1.82 to $1.985.

What is Damian R. Beauchamp’s relationship to the NPWR share sales?

Damian R. Beauchamp indirectly owns approximately 63.70% of 8 Rivers and directly owns approximately 3.83% of 8 Rivers. He may be deemed an indirect beneficial owner of the securities held by NPEH, LLC to the extent of his pecuniary interest and disclaims beneficial ownership beyond that.

How is 8 Rivers Capital, LLC connected to the NPWR shares sold by NPEH, LLC?

8 Rivers Capital, LLC is the manager and holds approximately 90.9% of the outstanding equity of NPEH, LLC. It may be deemed a beneficial owner of NPEH’s Net Power Inc. shares to the extent of its pecuniary interest, while expressly disclaiming broader beneficial ownership.

Were the reported NPWR insider sales made under a Rule 10b5-1 trading plan?

The filing’s Rule 10b5-1 checkbox is not checked, and the footnotes do not state that the sales were made pursuant to a Rule 10b5-1 trading plan, so the transactions are not described as being under such a plan.

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

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Available on EDGAR 08/27/2026 - 06:00 PM EDT Accepted by SEC EDGAR 08/27/2026 - 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^*

8 Rivers Capital, 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)
08/25/2026

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

	Form filed by One Reporting Person
X	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	08/25/2026		S		201,550	D	$1.9065(1)	1,041,350	I	By: NPEH, LLC(3)(4)
Class A Common Stock	08/26/2026		S		41,350	D	$1.9124(2)	1,000,000	I	By: NPEH, LLC(3)(4)

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 NORTH CAROLINA 27701

(City) (State) (Zip)

UNITED STATES

(Country)

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 NORTH CAROLINA 27701

(City) (State) (Zip)

UNITED STATES

(Country)

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 prices ranging from $1.84 to $2.0091. 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 $1.82 to $1.985. 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. 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.

4. Damian R. Beauchamp ("Mr. Beauchamp") independently indirectly owns approximately 63.70% 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	08/27/2026
	By: /s/ Damian R. Beauchamp	08/27/2026
	** 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)