NPEH, 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, 18:01:35 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, its Manager

Key filing fact

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

Key facts

This page summarizes NPEH, 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, 18:01.

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 (1)

CIK 0001981772 Primary reporting owner

NPEH, LLC

Relationship: 10%+ Owner
Address: 406 BLACKWELL STREET, 4TH FLOOR, DURHAM
Signature: By: /s/ Min Lee, General Counsel of 8 Rivers Capital, LLC, its Manager
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: Direct
Footnotes: F1

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: Direct
Footnotes: F2

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: Direct
Footnotes: F3

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 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.