STOCK TITAN

NPEH swaps 3,000,000 units for NET Power (NPWR) Class A shares

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4/A

Rhea-AI Filing Summary

NPEH, LLC, a 10% owner of NET Power Inc., reported an internal equity reclassification. On March 6, 2026, NPEH exchanged 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of NET Power Class A Common Stock, at a stated price of $0.00 per share. For each exchanged unit, a corresponding share of NET Power Class B Common Stock held by NPEH, which has no economic value, was cancelled, leaving NPEH with 17,729,880 Class B shares and 17,729,880 Class A Units. Following the transaction, NPEH directly owns 3,400,000 shares of NET Power Class A Common Stock. This amendment corrects an administrative error in an earlier Form 4 by properly reflecting the 3,000,000 Class A Units as converted in the derivative table.

Positive

  • None.

Negative

  • None.
Insider NPEH, LLC
Role null
Type Security Shares Price Value
Conversion Class A Units of NET Power Operations LLC 3,000,000 $0.00 --
Conversion Class A Common Stock 3,000,000 $0.00 --
Other Class B Common Stock 3,000,000 $0.00 --
Holdings After Transaction: Class A Units of NET Power Operations LLC — 17,729,880 shares (Direct, null); Class A Common Stock — 3,400,000 shares (Direct, null); Class B Common Stock — 17,729,880 shares (Direct, null)
Footnotes (1)
  1. 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. 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. This amendment is being filed to correct an administrative error in the Form 4 filed on March 10, 2026 (the "Original Form 4") and report the 3,000,000 Class A Units of NET Power Operations LLC that were converted into an equal number of shares of the Issuer's Class A Common Stock as being disposed of by the Reporting Person. The Original Form 4 inadvertently omitted such Class A Units from Table II.
Units converted 3,000,000 Class A Units Exchanged into Class A Common Stock on March 6, 2026
Shares received 3,000,000 Class A Common shares Issued to NPEH, LLC upon unit exchange
Class A Common post-transaction 3,400,000 shares NPEH direct holdings after conversion
Class A Units post-transaction 17,729,880 units NET Power Operations LLC units held by NPEH after exchange
Class B Common post-transaction 17,729,880 shares NPEH Class B holdings after related cancellations
Stated conversion price $0.00 per share Price per share for the reported transactions
Class A Units of NET Power Operations LLC financial
"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..."
Class A Common Stock financial
"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."
Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.
Class B Common Stock financial
"an equal number of shares of Class B Common Stock of the Issuer held by NPEH, which have no economic value, were cancelled."
A class B common stock is one of multiple types of a company’s ordinary shares that carries specific rights—often different voting power or dividend priority—compared with other classes. For investors it matters because those differences affect how much influence you have over company decisions, the income you might receive, and how freely the shares trade; think of it like owning a car with different keys: some keys let you start the engine and open the trunk, others only unlock the door.
Conversion of derivative security financial
"transaction_code_description: Conversion of derivative security"
administrative error financial
"This amendment is being filed to correct an administrative error in the Form 4 filed on March 10, 2026..."
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
NPEH, LLC

(Last)(First)(Middle)
406 BLACKWELL STREET, 4TH FLOOR

(Street)
DURHAM NORTH CAROLINA 27701

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
NET Power Inc. [ NPWR ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
DirectorX10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
03/06/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)
03/10/2026
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Class A Common Stock03/06/2026C3,000,000A(1)3,400,000D
Class B Common Stock03/06/2026J3,000,000D(2)17,729,880D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Class A Units of NET Power Operations LLC(1)(3)03/06/2026(3)C3,000,000 (1)(3) (1)(3)Class A Common Stock3,000,000(1)(3)17,729,880D
Explanation of Responses:
1. 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.
2. 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.
3. This amendment is being filed to correct an administrative error in the Form 4 filed on March 10, 2026 (the "Original Form 4") and report the 3,000,000 Class A Units of NET Power Operations LLC that were converted into an equal number of shares of the Issuer's Class A Common Stock as being disposed of by the Reporting Person. The Original Form 4 inadvertently omitted such Class A Units from Table II.
By: /s/ Min Lee, General Counsel of 8 Rivers Capital, LLC, its Manager05/13/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did NPEH, LLC report in NET Power (NPWR) shares?

NPEH, LLC reported exchanging 3,000,000 Class A Units of NET Power Operations LLC for 3,000,000 shares of NET Power Class A Common Stock. This was an internal conversion at a stated price of $0.00 per share, not an open-market purchase or sale.

How did the NET Power (NPWR) unit conversion affect NPEH’s Class A Common Stock holdings?

After converting 3,000,000 Class A Units into 3,000,000 shares of Class A Common Stock, NPEH, LLC directly holds 3,400,000 Class A shares. This reflects the post-transaction ownership reported in the filing, consolidating more of NPEH’s economic interest into listed common stock.

What happened to NPEH’s Class B Common Stock in the NET Power (NPWR) filing?

For each exchanged Class A Unit, one corresponding NET Power Class B Common share held by NPEH was cancelled. These Class B shares have no economic value. After the cancellations, NPEH still holds 17,729,880 Class B shares linked to remaining Class A Units.

Why was this Form 4/A amendment filed for NET Power (NPWR)?

The amendment corrects an administrative error in an earlier Form 4 that omitted the 3,000,000 Class A Units from the derivative securities table. It reclassifies those units as converted into an equal number of Class A Common shares, aligning the derivative table with the actual exchange.

Did NPEH, LLC sell or buy NET Power (NPWR) shares on the open market?

The reported activity reflects a conversion of 3,000,000 Class A Units into Class A Common Stock and cancellation of related Class B shares, all at a stated price of $0.00. The filing does not show open-market buys or sells; it records an internal equity restructuring.

What are NET Power Operations LLC Class A Units mentioned in the NPEH filing?

The Class A Units of NET Power Operations LLC are exchangeable on a one-for-one basis into NET Power Class A Common Stock or, at NET Power’s election, cash. They have no expiration date. NPEH exchanged 3,000,000 such units for 3,000,000 Class A shares on March 6, 2026.