Marc Horstman - 15 Apr 2025 Form 3 Insider Report for NET Power Inc. (NPWR)

Role: Chief Operating Officer
Signature: /s/ Marc Horstman
Issuer symbol: NPWR
Transactions as of: 15 Apr 2025
Net transactions value: $0
Form type: 3
Filing time: 04 Jun 2025, 21:13:43 UTC
Next filing: 04 Jun 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Horstman Marc	Chief Operating Officer	320 RONEY STREET, SUITE 200, DURHAM	/s/ Marc Horstman	03 Jun 2025	0002070734

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	NPWR	Restricted Stock Units						165,814	15 Apr 2025	Direct	F1
holding	NPWR	Class A Common Stock						1,845	15 Apr 2025	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	On August 28, 2023, the Reporting Person recieved a grant of 20,000 restricted stock units ("RSUs") that vest on August 28, 2026, subject to continued employment. On April 2, 2024, the Reporting Person received a grant of 8,442 RSUs, of which 5,527 RSUs are still outstanding and will vest in equal installments on each of April 2, 2026 and April 2, 2027, subject to continued employment. On April 2, 2025, the Reporting Person received a grant of 46,729 RSUs that will vest in equal installments on each of April 2, 2026, April 2, 2027 and April 2, 2028, subejct to continued employment. On April 2, 2025, the Reporting Person also received a grant of 93,458 RSUs that will vest on April 2, 2028, subject to continued employment.

Content

On August 28, 2023, the Reporting Person recieved a grant of 20,000 restricted stock units ("RSUs") that vest on August 28, 2026, subject to continued employment. On April 2, 2024, the Reporting Person received a grant of 8,442 RSUs, of which 5,527 RSUs are still outstanding and will vest in equal installments on each of April 2, 2026 and April 2, 2027, subject to continued employment. On April 2, 2025, the Reporting Person received a grant of 46,729 RSUs that will vest in equal installments on each of April 2, 2026, April 2, 2027 and April 2, 2028, subejct to continued employment. On April 2, 2025, the Reporting Person also received a grant of 93,458 RSUs that will vest on April 2, 2028, subject to continued employment.