8 Rivers Capital, LLC - 06 Mar 2026 Form 4 Insider Report for NET Power Inc. (NPWR)

Role: 10%+ Owner
Signature: By: /s/ Min Lee, General Counsel of 8 Rivers Capital, LLC
Issuer symbol: NPWR
Transactions as of: 06 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 10 Mar 2026, 18:02:02 UTC
Previous filing: 05 Mar 2026
SEC: View on sec.gov

Reporting Owners (2)

Name	Relationship	Address	Signature	Signature date	CIK
8 Rivers Capital, LLC	10%+ Owner	406 BLACKWELL STREET, 4TH FLOOR, DURHAM	By: /s/ Min Lee, General Counsel of 8 Rivers Capital, LLC	10 Mar 2026	0001981100
BEAUCHAMP DAMIAN R.	10%+ Owner	406 BLACKWELL STREET, 4TH FLOOR, DURHAM	By: /s/ Damian R. Beauchamp	10 Mar 2026	0001973442

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	NPWR	Class A Common Stock	Conversion of derivative security		+3,000,000	+750%		3,400,000	06 Mar 2026	By: NPEH, LLC	F1, F3, F4
transaction	NPWR	Class B Common Stock	Other		-3,000,000	-14%		17,729,880	06 Mar 2026	By: NPEH, LLC	F2, F3, F4

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

Explanation of Responses:

Id	Content
F1	The Class A Units of NET Power Operations LLC are exchangeable into shares of the Issuer's Class A Common Stock or, at the Issuer's election, cash, on a one-for-one basis and have no expiration date. On March 6, 2026, NPEH exchanged 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of the Issuer's Class A Common Stock.
F2	For each Class A Unit of Net Power Operations LLC, NPEH owns a corresponding share of Class B Common Stock of the Issuer. Upon the exchange of 3,000,000 Class A Units of Net Power Operations LLC, an equal number of shares of Class B Common Stock of the Issuer held by NPEH, which have no economic value, were cancelled.
F3	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.
F4	Damian R. Beauchamp ("Mr. Beauchamp") independently indirectly owns approximately 63.72% 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.