Marc Horstman - 02 Jun 2025 Form 4 Insider Report for NET Power Inc. (NPWR)

Reporting relationship: Chief Operating Officer
Issuer ticker: NPWR
Reported as of: 02 Jun 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 04 Jun 2025, 21:14:44 UTC
Prior SEC filing: 04 Jun 2025
Source filing: View source filing
Reporting owner signature: /s/ Marc Horstman

Key filing fact

Marc Horstman filed Form 4 for NET Power Inc. (NPWR) on 04 Jun 2025.

Key facts

This page summarizes Marc Horstman's Form 4 filing for NET Power Inc. (NPWR).
2 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 04 Jun 2025, 21:14.

Change

Previous filing in this sequence was filed on 04 Jun 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 0002070734 Primary reporting owner

Horstman Marc

Relationship: Chief Operating Officer
Address: 320 RONEY STREET, SUITE 200, DURHAM
Signature: /s/ Marc Horstman
Signature date: 04 Jun 2025

Reported derivative securities

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

NPWR transaction Derivative

Stock Options

Award

Transaction value: $0
Shares: +240,000
Change %
Price: $0.000000
Shares after: 240,000
Date: 02 Jun 2025
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 240,000
Exercise price: $2.13
Footnotes: F1

NPWR transaction Derivative

Performance Stock Units

Award

Transaction value: $0
Shares: +74,766
Change %
Price: $0.000000
Shares after: 74,766
Date: 02 Jun 2025
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 74,766
Exercise price
Footnotes: F2

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Stock options vest on June 2, 2026, subject to continued employment.

Footnote F2

The Reporting Person will receive a number of shares of Class A common stock equal to 50% of the number of PSUs upon attainment of a 10% compound annual growth rate ("CAGR") of the 30-day volume weighted average price ("VWAP") of a share of Class A common stock on April 2, 2028 as compared to the VWAP of a share of Class A common stock on April 2, 2025. The Reporting Person will receive a number of shares of Class A common stock equal to 100% of the number of PSUs upon attainment of a 12% CAGR of the VWAP of a share of Class A common stock on April 2, 2028 as compared to the VWAP of a share of Class A common stock on April 2, 2025. The Reporting Person will receive a number of shares of Class A common stock equal to 200% of the number of PSUs upon attainment of a 15% CAGR of the VWAP of a share of Class A common stock on April 2, 2028 as compared to the VWAP of a share of Class A common stock on April 2, 2025.