8 Rivers Capital, LLC - 12 Aug 2026 Form 4 Insider Report for Net Power Inc. (NPWR)

Reporting relationship: 10%+ Owner
Issuer ticker: NPWR
Reported as of: 12 Aug 2026
Net transaction value: -$1,395,933
SEC form: 4
Accepted by SEC: 14 Aug 2026, 18:00:09 UTC
Prior SEC filing: 11 Aug 2026
Source filing: View source filing
Reporting owner signature: By: /s/ Min Lee, General Counsel of 8 Rivers Capital, LLC

Key filing fact

8 Rivers Capital, LLC filed Form 4 for Net Power Inc. (NPWR) on 14 Aug 2026.

Key facts

This page summarizes 8 Rivers Capital, LLC's Form 4 filing for Net Power Inc. (NPWR).
3 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 14 Aug 2026, 18:00.

Change

Previous filing in this sequence was filed on 11 Aug 2026.
Current net transaction value: -$1,395,933.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (2)

CIK 0001981100 Primary reporting owner

8 Rivers Capital, LLC

Relationship: 10%+ Owner
Address: 406 BLACKWELL STREET, 4TH FLOOR, DURHAM
Signature: By: /s/ Min Lee, General Counsel of 8 Rivers Capital, LLC
Signature date: 14 Aug 2026

CIK 0001973442

BEAUCHAMP DAMIAN R.

Relationship: 10%+ Owner
Address: 406 BLACKWELL STREET, 4TH FLOOR, DURHAM
Signature: By: /s/ Damian R. Beauchamp
Signature date: 14 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

NPWR transaction

Class A Common Stock

Sale

Transaction value: $81,575
Shares: -50,000
Change %: -2.5%
Price: $1.63
Shares after: 1,950,000
Date: 12 Aug 2026
Ownership: By: NPEH, LLC
Footnotes: F1, F4, F5

NPWR transaction

Class A Common Stock

Sale

Transaction value: $81,575
Shares: -50,000
Change %: -2.5%
Price: $1.63
Shares after: 1,950,000
Date: 12 Aug 2026
Ownership: By: NPEH, LLC
Footnotes: F1, F4, F5

NPWR transaction

Class A Common Stock

Sale

Transaction value: $323,840
Shares: -200,000
Change %: -10%
Price: $1.62
Shares after: 1,750,000
Date: 13 Aug 2026
Ownership: By: NPEH, LLC
Footnotes: F2, F4, F5

NPWR transaction

Class A Common Stock

Sale

Transaction value: $323,840
Shares: -200,000
Change %: -10%
Price: $1.62
Shares after: 1,750,000
Date: 13 Aug 2026
Ownership: By: NPEH, LLC
Footnotes: F2, F4, F5

NPWR transaction

Class A Common Stock

Sale

Transaction value: $990,518
Shares: -507,100
Change %: -29%
Price: $1.95
Shares after: 1,242,900
Date: 14 Aug 2026
Ownership: By: NPEH, LLC
Footnotes: F3, F4, F5

NPWR transaction

Class A Common Stock

Sale

Transaction value: $990,518
Shares: -507,100
Change %: -29%
Price: $1.95
Shares after: 1,242,900
Date: 14 Aug 2026
Ownership: By: NPEH, LLC
Footnotes: F3, F4, F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote 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 $1.62 to $1.665. 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.

Footnote 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 $1.585 to $1.65. 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.

Footnote 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 $1.85 to $2.06. 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.

Footnote 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.

Footnote 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.