SK INC. - 30 Jul 2025 Form 4 Insider Report for NET Power Inc. (NPWR)

Reporting relationship: 10%+ Owner
Issuer ticker: NPWR
Reported as of: 30 Jul 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 31 Jul 2025, 19:06:37 UTC
Prior SEC filing: 17 Jul 2025
Source filing: View source filing
Reporting owner signature: /s/ Munhyuk Jang, Head of Corporate Management Department of SK Inc.

Key filing fact

SK INC. filed Form 4 for NET Power Inc. (NPWR) on 31 Jul 2025.

Key facts

This page summarizes SK INC.'s Form 4 filing for NET Power Inc. (NPWR).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 31 Jul 2025, 19:06.

Change

Previous filing in this sequence was filed on 17 Jul 2025.
Current net transaction value: $0.

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 0001947998 Primary reporting owner

SK INC.

Relationship: 10%+ Owner
Address: 26, JONG-RO, JONGNO-GU, SEOUL, KOREA, REPUBLIC OF
Signature: /s/ Munhyuk Jang, Head of Corporate Management Department of SK Inc.
Signature date: 31 Jul 2025

Reported non-derivative transactions

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

NPWR transaction

Class B Common Stock

Other

Transaction value
Shares: -26,729,880
Change %: -100%
Price
Shares after: 0
Date: 30 Jul 2025
Ownership: See Footnotes
Footnotes: F1, F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

NPWR transaction Derivative

Class A Units of NET Power Operations LLC

Other

Transaction value
Shares: -26,729,880
Change %: -100%
Price
Shares after: 0
Date: 30 Jul 2025
Ownership: See Footnotes
Underlying class: Class A Common Stock
Underlying amount: 26,729,880
Exercise price
Footnotes: F1, F2

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

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

SK INC. is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 2 footnotes

Footnote F1

The securities reported in this Form 4 are directly held by NPEH, LLC ("NPEH"), a limited liability company of which the Reporting Person was the indirect majority owner. On July 30, 2025, the Reporting Person sold 100% of the equity interests of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedoria"). Tillandsia, Areca and Chamaedorea own approximately 18.6%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers Capital, LLC ("8 Rivers"). 8 Rivers is the manager and owns approximately 91.4% of NPEH.

Footnote F2

For each Class A Unit of Net Power Operations LLC, NPEH owns one corresponding share of Class B Common Stock of the Issuer. The Class A Units of NET Power Operations LLC are exchangeable (together with the cancellation of a corresponding number of shares of the Issuer's Class B Common Stock) into shares of the Issuer's Class A Common Stock on a one-for-one basis or, at the Issuer's election, cash, and have no expiration date.