NET Power (NPWR) affiliate sells 255,858 shares in late July 2026

Rhea-AI Filing Summary

8 Rivers Capital, LLC and Damian R. Beauchamp, both 10% owners of NET Power Inc., reported indirect sales of an aggregate 255,858 shares of Class A Common Stock by NPEH, LLC on July 28–30, 2026, at weighted-average prices between $1.40 and $1.495 per share, while each disclaims beneficial ownership beyond their pecuniary interests.

Insider Trade Summary

Net Seller: 255,858 shares

Net Sell 3 txns

Insider 8 Rivers Capital, LLC, BEAUCHAMP DAMIAN R.

Role 10% Owner | 10% Owner

Sold 255,858 shs ($367K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F3, F4, F5	155,000	$1.4284	$221K
Sale	Class A Common Stock F2, F4, F5	45,000	$1.4073	$63K
Sale	Class A Common Stock F1, F4, F5	55,858	$1.4721	$82K

Holdings After Transaction: Class A Common Stock — 2,500,000 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 $1.415 to $1.495. 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 $1.40 to $1.41. 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 $1.40 to $1.47. 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

Aggregate shares sold: 255,858 shares Shares sold on 2026-07-28: 55,858 shares Weighted average price 2026-07-28: $1.4721 per share +4 more

7 metrics

Aggregate shares sold 255,858 shares Total Class A Common Stock sold indirectly by NPEH, LLC from 2026-07-28 to 2026-07-30

Shares sold on 2026-07-28 55,858 shares Class A Common Stock sold indirectly by NPEH, LLC at weighted-average price on 2026-07-28

Weighted average price 2026-07-28 $1.4721 per share Average sale price; individual trades ranged from $1.415 to $1.495 on 2026-07-28

Shares sold on 2026-07-29 45,000 shares Class A Common Stock sold indirectly by NPEH, LLC at weighted-average price on 2026-07-29

Weighted average price 2026-07-29 $1.4073 per share Average sale price; trades executed between $1.40 and $1.41 on 2026-07-29

Shares sold on 2026-07-30 155,000 shares Class A Common Stock sold indirectly by NPEH, LLC at weighted-average price on 2026-07-30

Weighted average price 2026-07-30 $1.4284 per share Average sale price; trades executed between $1.40 and $1.47 on 2026-07-30

Key Terms

weighted average sales price, beneficial owner, pecuniary interest, Section 16

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 therein"

Section 16 regulatory

"beneficial owner of such securities for purposes of Section 16 or otherwise"

Section 16 is a U.S. securities law rule that governs the trading and disclosure obligations of company insiders — typically officers, directors and large shareholders — to promote transparency and deter unfair profit-taking. It requires insiders to publicly report their stock trades and allows companies or the issuer to reclaim quick, short-term profits from certain insider trades, like a scoreboard and a refund policy that help investors see and limit possible insider advantage.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/30/2026 - 06:00 PM Accepted by SEC EDGAR 07/30/2026 - 06:00 PM Learn about SEC filing dates

FAQ

What did the NET Power (NPWR) Form 4 filed by 8 Rivers Capital report?

The Form 4 reports indirect sales of 255,858 NPWR Class A shares by NPEH, LLC on July 28–30, 2026, at weighted-average prices between $1.40 and $1.495 per share, with 8 Rivers and Damian R. Beauchamp disclosing only indirect, pecuniary beneficial interests.

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

NPEH, LLC sold 55,858 shares on July 28, 2026 at a weighted-average $1.4721, 45,000 shares on July 29 at $1.4073, and 155,000 shares on July 30 at $1.4284, each executed through multiple trades within the disclosed price ranges.

Who actually held the NET Power (NPWR) shares sold in this Form 4?

The shares were directly owned and sold by NPEH, LLC. 8 Rivers Capital, LLC holds about 90.9% of NPEH’s equity and may be deemed a beneficial owner, while Damian R. Beauchamp indirectly and directly owns interests in 8 Rivers, all limited to their pecuniary interests.

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

Damian R. Beauchamp independently indirectly owns 63.70% of 8 Rivers and directly owns 3.83%. Through these stakes, he may be deemed an indirect beneficial owner of NPEH’s NET Power shares, but he disclaims beneficial ownership beyond his pecuniary interest.

Were the reported NET Power (NPWR) sales made under a Rule 10b5-1 trading plan?

The Form 4’s Rule 10b5-1 checkbox is not marked as adopted, and the footnotes describe pricing, ownership, and beneficial interest but do not reference any Rule 10b5-1 or other pre-arranged trading plan for these transactions.

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)
07/28/2026

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	07/28/2026		S		55,858	D	$1.4721(1)	2,700,000	I	By: NPEH, LLC(4)(5)
Class A Common Stock	07/29/2026		S		45,000	D	$1.4073(2)	2,655,000	I	By: NPEH, LLC(4)(5)
Class A Common Stock	07/30/2026		S		155,000	D	$1.4284(3)	2,500,000	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 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 $1.415 to $1.495. 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 $1.40 to $1.41. 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 $1.40 to $1.47. 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	07/30/2026
	By: /s/ Damian R. Beauchamp	07/30/2026
	** 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)