NPEH, LLC - 31 Oct 2025 Form 4 Insider Report for NET Power Inc. (NPWR)

Role
10%+ Owner
Signature
By: /s/ Min Lee, General Counsel of 8 Rivers Capital, LLC, its Manager
Issuer symbol
NPWR
Transactions as of
31 Oct 2025
Transactions value $
$-107,348
Form type
4
Filing time
04 Nov 2025, 21:16:30 UTC
Previous filing
30 Oct 2025
Next filing
19 Nov 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
NPEH, LLC 10%+ Owner 406 BLACKWELL STREET, 4TH FLOOR, DURHAM By: /s/ Min Lee, General Counsel of 8 Rivers Capital, LLC, its Manager 04 Nov 2025 0001981772

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction NPWR Class A Common Stock Sale $-73,419 -18,116 -0.97% $4.05 1,847,130 31 Oct 2025 Direct F1
transaction NPWR Class A Common Stock Sale $-33,929 -8,477 -0.46% $4.00 1,838,653 03 Nov 2025 Direct F2
transaction NPWR Class A Common Stock Conversion of derivative security +2,000,000 +109% 3,838,653 03 Nov 2025 Direct F3
transaction NPWR Class B Common Stock Other -2,000,000 -8.8% 20,729,880 03 Nov 2025 Direct F4

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction NPWR Class A Units of NET Power Operations LLC Conversion of derivative security -2,000,000 -8.8% 20,729,880 03 Nov 2025 Class A Common Stock 2,000,000 Direct F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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 $4.05 to $4.06. 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.
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 $4.00 to $4.01. 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.
F3 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 November 03, 2025, NPEH exchanged 2,000,000 Class A Units of NET Power Operations LLC for 2,000,000 shares of the Issuer's Class A Common Stock.
F4 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 2,000,000 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.