Insider filing report for Changes in Beneficial Ownership
- Schedule 13G & 13D forms are used to report a party's ownership of stock which exceeds 5% of a company's total stock issue.
- Schedule 13G is a shorter version of Schedule 13D with fewer reporting requirements.
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 |
SCHEDULE 13D
Under the Securities Exchange Act of 1934
(Amendment No. 5)*
|
NET Power Inc. (Name of Issuer) |
Class A Common Stock, par value $0.0001 (Title of Class of Securities) |
64107A105 (CUSIP Number) |
Min Lee 8 Rivers Capital, LLC, 406 Blackwell Street, 4th Floor Durham, NC, 27701 919-667-1800 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) |
07/15/2025 (Date of Event Which Requires Filing of This Statement) |
If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.


The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the
Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other
provisions of the Act (however, see the Notes).
SCHEDULE 13D
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CUSIP No. | 64107A105 |
1 |
Name of reporting person
8 RIVERS CAPITAL, LLC | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
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3 | SEC use only | ||||||||
4 |
Source of funds (See Instructions)
WC, OO | ||||||||
5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
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6 | Citizenship or place of organization
DELAWARE
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Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
11 | Aggregate amount beneficially owned by each reporting person
26,729,880.00 | ||||||||
12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
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13 | Percent of class represented by amount in Row (11)
25.6 % | ||||||||
14 | Type of Reporting Person (See Instructions)
OO |
Comment for Type of Reporting Person:
Row 8, 10 and 11. Beneficial ownership of shares of Class A common stock, par value $0.0001 per share ("Class A Common Stock"), of NET Power, Inc. (the "Issuer") is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such shares as a result of the relationships described under Item 2 and Item 3 and the matters described in Item 3, Item 4 and Item 5 of Schedule 13D (as defined below), as amended by this Amendment No. 5 (as defined below). Represents 26,729,880 Class A Units of NET Power Operations LLC ("Opco Units") held directly by NPEH, LLC ("NPEH"), that are exchangeable for shares of Class A Common Stock on a one-for-one basis as described herein. At the time of any such exchange, an equal number of shares of Class B common stock, par value $0.0001 per share ("Class B Common Stock"), of the Issuer held directly by NPEH, which have no economic value, will be cancelled. Row 13. Based upon (i) 77,726,852 shares of Class A Common Stock issued and outstanding as of May 9, 2025, as reported in the Issuer's Current Report on Form 10-Q filed with the Securities and Exchange Commission (the "SEC") on May 12, 2025 (the "Issuer Form 10-Q") and (ii) 26,729,880 shares of Class A Common Stock issuable to NPEH upon the redemption and exchange of an equal number of Opco Units (and the cancellation of an equal number of shares of Class B Common Stock) held by NPEH.
SCHEDULE 13D
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CUSIP No. | 64107A105 |
1 |
Name of reporting person
NPEH, LLC | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
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3 | SEC use only | ||||||||
4 |
Source of funds (See Instructions)
OO | ||||||||
5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
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6 | Citizenship or place of organization
DELAWARE
| ||||||||
Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
11 | Aggregate amount beneficially owned by each reporting person
26,729,880.00 | ||||||||
12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
![]() | ||||||||
13 | Percent of class represented by amount in Row (11)
25.6 % | ||||||||
14 | Type of Reporting Person (See Instructions)
OO |
Comment for Type of Reporting Person:
Row 8, 10 and 11. Represents 26,729,880 Opco Units held directly by NPEH that are exchangeable for shares of Class A Common Stock on a one-for-one basis as described herein. At the time of any such exchange, an equal number of shares of Class B Common Stock held directly by NPEH, which have no economic value, will be cancelled. Row 13. Based upon (i) 77,726,852 shares of Class A Common Stock issued and outstanding as of May 9, 2025, as reported in the Issuer Form 10-Q and (ii) 26,729,880 shares of Class A Common Stock issuable to NPEH upon the redemption and exchange of an equal number of Opco Units (and the cancellation of an equal number of shares of Class B Common Stock) held by NPEH.
SCHEDULE 13D
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CUSIP No. | 64107A105 |
1 |
Name of reporting person
SK INC. | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
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3 | SEC use only | ||||||||
4 |
Source of funds (See Instructions)
WC, OO | ||||||||
5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
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6 | Citizenship or place of organization
KOREA, REPUBLIC OF
| ||||||||
Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
11 | Aggregate amount beneficially owned by each reporting person
26,729,880.00 | ||||||||
12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
![]() | ||||||||
13 | Percent of class represented by amount in Row (11)
25.6 % | ||||||||
14 | Type of Reporting Person (See Instructions)
OO |
Comment for Type of Reporting Person:
Row 8, 10 and 11. Beneficial ownership of shares of Class A Common Stock is being reported hereunder solely because the reporting person may be deemed to have beneficial ownership of such shares as a result of the relationships described under Item 2 and Item 3 and the matters described in Item 3, 4 and Item 5 of the Schedule 13D, as amended by this Amendment No. 5. Represents 26,729,880 Opco Units held directly by NPEH that are exchangeable for shares of Class A Common Stock on a one-for-one basis as described herein. At the time of any such exchange, an equal number of shares of Class B Common Stock held directly by NPEH, which have no economic value, will be cancelled. Row 13. Based upon (i) 77,726,852 shares of Class A Common Stock issued and outstanding as of May 9, 2025, as reported in the Issuer Form 10-Q and (ii) 26,729,880 shares of Class A Common Stock issuable to NPEH upon the redemption and exchange of an equal number of Opco Units (and the cancellation of an equal number of shares of Class B Common Stock) held by NPEH.
SCHEDULE 13D
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CUSIP No. | 64107A105 |
1 |
Name of reporting person
TILLANDSIA, INC. | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
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3 | SEC use only | ||||||||
4 |
Source of funds (See Instructions)
WC, OO | ||||||||
5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
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6 | Citizenship or place of organization
DELAWARE
| ||||||||
Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
11 | Aggregate amount beneficially owned by each reporting person
0.00 | ||||||||
12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
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13 | Percent of class represented by amount in Row (11)
0 % | ||||||||
14 | Type of Reporting Person (See Instructions)
OO |
Comment for Type of Reporting Person:
Row 8 and 10. SK directly owns 100.0% of the outstanding equity of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca"), and Chamaedorea, Inc. ("Chamaedorea"), and each of Tillandsia, Areca and Chamaedorea directly owns approximately 18.60%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers Capital, LLC ("8 Rivers") and thus SK may be deemed to be a beneficial owner of the shares beneficially owned by 8 Rivers. 8 Rivers beneficially owns approximately 91.4% of the outstanding equity of NPEH and is the manager of NPEH and thus may be deemed to be a beneficial owner of the shares of Class A Common Stock deemed to be directly owned by NPEH. As indicated above, each of Tillandsia, Areca and Chamaedorea directly owns approximately 18.60%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers and none of Tillandsia, Areca or Chamaedorea controls 8 Rivers or NPEH.
SCHEDULE 13D
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CUSIP No. | 64107A105 |
1 |
Name of reporting person
ARECA, INC. | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
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3 | SEC use only | ||||||||
4 |
Source of funds (See Instructions)
WC, OO | ||||||||
5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
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6 | Citizenship or place of organization
DELAWARE
| ||||||||
Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
11 | Aggregate amount beneficially owned by each reporting person
0.00 | ||||||||
12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
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13 | Percent of class represented by amount in Row (11)
0 % | ||||||||
14 | Type of Reporting Person (See Instructions)
OO |
Comment for Type of Reporting Person:
Row 8 and 10. SK directly owns 100.0% of the outstanding equity of Tillandsia, Areca and Chamaedorea, and each of Tillandsia, Areca and Chamaedorea directly owns approximately 18.60%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the shares beneficially owned by 8 Rivers. 8 Rivers beneficially owns approximately 91.4% of the outstanding equity of NPEH and is the manager of NPEH and thus may be deemed to be a beneficial owner of the shares of Class A Common Stock deemed to be directly owned by NPEH. As indicated above, each of Tillandsia, Areca and Chamaedorea directly owns approximately 18.60%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers and none of Tillandsia, Areca or Chamaedorea controls 8 Rivers or NPEH.
SCHEDULE 13D
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CUSIP No. | 64107A105 |
1 |
Name of reporting person
CHAMAEDOREA, INC. | ||||||||
2 | Check the appropriate box if a member of a Group (See Instructions)
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3 | SEC use only | ||||||||
4 |
Source of funds (See Instructions)
WC, OO | ||||||||
5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
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6 | Citizenship or place of organization
DELAWARE
| ||||||||
Number of Shares Beneficially Owned by Each Reporting Person With: |
| ||||||||
11 | Aggregate amount beneficially owned by each reporting person
0.00 | ||||||||
12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
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13 | Percent of class represented by amount in Row (11)
0 % | ||||||||
14 | Type of Reporting Person (See Instructions)
OO |
Comment for Type of Reporting Person:
Row 8 and 10. SK directly owns 100.0% of the outstanding equity of Tillandsia, Areca and Chamaedorea, and each of Tillandsia, Areca and Chamaedorea directly owns approximately 18.60%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers and thus SK may be deemed to be a beneficial owner of the shares beneficially owned by 8 Rivers. 8 Rivers beneficially owns approximately 91.4% of the outstanding equity of NPEH and is the manager of NPEH and thus may be deemed to be a beneficial owner of the shares of Class A Common Stock deemed to be directly owned by NPEH. As indicated above, each of Tillandsia, Areca and Chamaedorea directly owns approximately 18.60%, 25.77% and 24.11%, respectively, of the voting units of 8 Rivers and none of Tillandsia, Areca or Chamaedorea controls 8 Rivers or NPEH.
SCHEDULE 13D
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Item 1. | Security and Issuer | |
(a) | Title of Class of Securities:
Class A Common Stock, par value $0.0001 | |
(b) | Name of Issuer:
NET Power Inc. | |
(c) | Address of Issuer's Principal Executive Offices:
320 Roney Street, Suite 200, Durham,
NORTH CAROLINA
, 27701. | |
Item 1 Comment:
This Amendment No. 5 ("Amendment No. 5") to Schedule 13D amends the statement on Schedule 13D originally filed by each of 8 Rivers, NPEH, SK, Tillandsia, Areca and Chamaedorea (each, a "Reporting Person" and, collectively, the "Reporting Persons") on June 20, 2023, as amended by Amendment No. 1 on May 28, 2024, as amended by Amendment No. 2 on September 23, 2024, as amended by Amendment No. 3 on October 21, 2024 and as amended by Amendment No. 4 on November 26, 2024 (the "Schedule 13D"). Capitalized terms used but not defined in this Amendment No. 5 shall have the same meanings ascribed to them in the Schedule 13D. Except as otherwise provided herein, each Item of the Schedule 13D remains unchanged. | ||
Item 4. | Purpose of Transaction | |
The information contained in Item 4 of Schedule 13D is hereby amended and supplemented by adding the following information: On July 15, 2025, Tillandsia sold 2,500,000 shares of Class A Common Stock pursuant to a block trade through its placement manager, Citigroup Global Markets Inc., at a price of $2.61 per share (the "Block Trade"). | ||
Item 5. | Interest in Securities of the Issuer | |
(a) | The information contained in Item 5(a) and (b) of the Schedule 13D is hereby amended and restated in its entirety as follows: The information contained in rows 7, 8, 9, 10, 11 and 13 of the cover pages for each Reporting Person is hereby incorporated by reference in its entirety. The percentages reported in this Amendment No. 5 are calculated based upon (i) 77,726,852 shares of Class A Common Stock issued and outstanding as of May 9, 2025, as reported in the Issuer Form 10-Q and (ii) 26,729,880 shares of Class A Common Stock issuable to NPEH upon the redemption and exchange of an equal number of Opco Units (and the cancellation of an equal number of shares of Class B Common Stock) held by NPEH. | |
(c) | Except as described in this Amendment No. 5, no transactions in the class of securities reported have been effected during the past sixty (60) days by the Reporting Persons. | |
(d) | Other than as described in this Amendment No. 5, to the knowledge of the Reporting Persons, no other person has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities of Issuer covered by this Amendment No. 5. | |
(e) | Not applicable. |
SIGNATURE | |
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
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