Net Power holder sells 150,745 shares

Net Power Inc. reported that an affiliated entity completed a series of indirect open-market sales of Class A Common Stock.

Rhea-AI Filing Summary

Net Power Inc. reported that an affiliated entity completed a series of indirect open-market sales of Class A Common Stock. NPEH, LLC sold 60,345 shares on August 7, 2026 at a weighted average price of $1.5259 per share, 55,400 shares on August 10, 2026 at $1.5537 per share, and 35,000 shares on August 11, 2026 at $1.5997 per share, for a total of 150,745 shares sold indirectly. Prices on each date reflect weighted averages over multiple trades within disclosed intraday ranges. 8 Rivers Capital, LLC and Damian R. Beauchamp are associated with NPEH and may be deemed indirect beneficial owners to the extent of their pecuniary interests, but each disclaims beneficial ownership beyond that.

Insider Trade Summary

Net Seller: 150,745 shares

Net Sell 3 txns

Insider 8 Rivers Capital, LLC, BEAUCHAMP DAMIAN R.

Role 10% Owner | 10% Owner

Sold 150,745 shs ($234K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F3, F4, F5	35,000	$1.5997	$56K
Sale	Class A Common Stock F2, F4, F5	55,400	$1.5537	$86K
Sale	Class A Common Stock F1, F4, F5	60,345	$1.5259	$92K

Holdings After Transaction: Class A Common Stock — 2,000,000 shares (Indirect, By: NPEH, LLC)

Footnotes (5)

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.
4. F4. 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. F5. 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 Aug. 7, 2026: 60,345 shares Price Aug. 7, 2026: $1.5259 per share Shares sold Aug. 10, 2026: 55,400 shares +5 more

8 metrics

Shares sold Aug. 7, 2026 60,345 shares Indirect sale of Class A Common Stock by NPEH, LLC at weighted average price

Price Aug. 7, 2026 $1.5259 per share Weighted average sales price; actual trades ranged from $1.50 to $1.55

Shares sold Aug. 10, 2026 55,400 shares Indirect sale of Class A Common Stock by NPEH, LLC at weighted average price

Price Aug. 10, 2026 $1.5537 per share Weighted average sales price; trades ranged from $1.525 to $1.57

Shares sold Aug. 11, 2026 35,000 shares Indirect sale of Class A Common Stock by NPEH, LLC at weighted average price

Price Aug. 11, 2026 $1.5997 per share Weighted average sales price; trades ranged from $1.54 to $1.625

Total shares sold 150,745 shares Aggregate of three indirect open-market sales reported in the Form 4

Indirect ownership in NPEH Approximately 90.9% 8 Rivers Capital’s equity interest in NPEH, LLC as disclosed in footnotes

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

"8 Rivers 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 of any such securities, except to the extent of its pecuniary interest"

indirect beneficial owner financial

"Mr. Beauchamp may be deemed the indirect beneficial owner of the securities owned by NPEH"

FAQ

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

What insider activity did Net Power (NPWR) disclose in this Form 4?

Net Power reported indirect open-market sales of Class A Common Stock by NPEH, LLC totaling 150,745 shares over three days in August 2026, at weighted average prices between $1.5259 and $1.5997 per share.

How many Net Power (NPWR) shares were sold on each reported date?

NPEH, LLC sold 60,345 shares on August 7, 2026, 55,400 shares on August 10, 2026, and 35,000 shares on August 11, 2026, all as indirect sales of Net Power Class A Common Stock.

What prices did the Net Power (NPWR) shares sell for in these transactions?

The reported prices are weighted average sales prices: $1.5259, $1.5537, and $1.5997 per share. Footnotes state the actual trades occurred within ranges from $1.50 to $1.625 per share.

Who is considered the seller in the Net Power (NPWR) Form 4 transactions?

The shares were sold by NPEH, LLC. 8 Rivers Capital, LLC and Damian R. Beauchamp are associated with NPEH and may be deemed indirect beneficial owners to the extent of their pecuniary interests, subject to stated disclaimers.

Were the Net Power (NPWR) insider sales made under a Rule 10b5-1 plan?

The filing’s Rule 10b5-1 checkbox is not marked as affirming a plan, and no footnote states that the transactions were made pursuant to a Rule 10b5-1 trading arrangement.

How is Damian R. Beauchamp related to the Net Power (NPWR) share sales?

Footnotes state Damian R. Beauchamp indirectly owns approximately 63.70% of 8 Rivers and directly 3.83%, and may be deemed an indirect beneficial owner of NPEH-held shares only to the extent of his pecuniary interest, which he disclaims beyond that.

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^*

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)
08/07/2026

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	08/07/2026		S		60,345	D	$1.5259(1)	2,090,400	I	By: NPEH, LLC(4)(5)
Class A Common Stock	08/10/2026		S		55,400	D	$1.5537(2)	2,035,000	I	By: NPEH, LLC(4)(5)
Class A Common Stock	08/11/2026		S		35,000	D	$1.5997(3)	2,000,000	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 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 $1.50 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.

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 63.70% 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	08/11/2026
	By: /s/ Damian R. Beauchamp	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)