# EDGAR Filing Document

**Accession Number:** 0001845437
**File Stem:** 0001104659-25-073191
**Filing Date:** 2025-8
**Character Count:** 37210
**Document Hash:** 0d15bbc5c34cca1eff21bd7df3f25ffa
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-073191.hdr.sgml**: 20250801

**ACCESSION NUMBER**: 0001104659-25-073191

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20250801

**DATE AS OF CHANGE**: 20250801

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NET Power Inc.
- **CENTRAL INDEX KEY:** 0001845437
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRICAL INDUSTRIAL APPARATUS [3620]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 981580612
- **STATE OF INCORPORATION:** NC
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-92617
- **FILM NUMBER:** 251177469

**BUSINESS ADDRESS:**
- **STREET 1:** 320 RONEY STREET, SUITE 200
- **CITY:** DURHAM
- **STATE:** NC
- **ZIP:** 27701
- **BUSINESS PHONE:** (919) 287-4750

**MAIL ADDRESS:**
- **STREET 1:** 320 RONEY STREET, SUITE 200
- **CITY:** DURHAM
- **STATE:** NC
- **ZIP:** 27701

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Rice Acquisition Corp. II
- **DATE OF NAME CHANGE:** 20210210
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SK INC.
- **CENTRAL INDEX KEY:** 0001947998

**ORGANIZATION NAME:**
- **EIN:** 981183281
- **STATE OF INCORPORATION:** M5
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** 26, JONG-RO, JONGNO-GU
- **CITY:** SEOUL
- **STATE:** M5
- **ZIP:** 03188
- **BUSINESS PHONE:** 82221215114

**MAIL ADDRESS:**
- **STREET 1:** 26, JONG-RO, JONGNO-GU
- **CITY:** SEOUL
- **STATE:** M5
- **ZIP:** 03188

## Exhibit 99.1

**Exhibit 99.1**

<u>Joint Filing Agreement</u>

In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Statement on Schedule 13D (including amendments thereto) with respect to the Class A Common Stock, par value $0.0001 per share, of Net Power Inc. This Joint Filing Agreement shall be filed as an Exhibit to such Statement.

Dated July 30, 2025

---

| | |
|:---|:---|
| 8 RIVERS CAPITAL, LLC | 8 RIVERS CAPITAL, LLC |
| By: | /s/ Min Lee |
|  | Min Lee, Acting General Counsel |
| NPEH, LLC | NPEH, LLC |
| By: | /s/ Min Lee |
|  | Min Lee, Acting General Counsel |
| DAMIAN BEAUCHAMP | DAMIAN BEAUCHAMP |
| By: | /s/ Damian Beauchamp |
|  | Damian Beauchamp |
| CYNDA BEAUCHAMP | CYNDA BEAUCHAMP |
| By: | /s/ Cynda Beauchamp |
|  | Cynda Beauchamp |
| 8RCH, LLC | 8RCH, LLC |
| By: | /s/ Cynda Beauchamp |
|  | Cynda Beauchamp, President & Secretary |
| TILLANDSIA, INC. | TILLANDSIA, INC. |
| By: | /s/ Kiseon Park |
|  | Kiseon Park, President |
| ARECA, INC. | ARECA, INC. |
| By: | /s/ Jae Hun Jang |
|  | Jae Hun Jang, President |
| CHAMAEDOREA, INC. | CHAMAEDOREA, INC. |
| By: | /s/ Munhyuk Jang |
|  | Munhyuk Jang, Treasurer |
| SK INC. | SK INC. |
| By: | /s/ Munhyuk Jang |
|  | Munhyuk Jang, Head of Corporate Management Department |

---

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 6)**

**NET Power Inc.**

*(Name of Issuer)*

**Class A Common Stock, par value $0.0001**

*(Title of Class of Securities)*

**64107A105**

*(CUSIP Number)*

**Min Lee**<br>8 Rivers Capital, LLC<br>406 Blackwell Street, 4th Floor<br>Durham NC 27701<br>919-667-1800

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**07/30/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **64107A105** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**8 RIVERS CAPITAL, LLC** | Name of reporting person<br>**8 RIVERS CAPITAL, LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**26729880.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**26729880.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**26729880.00** | Aggregate amount beneficially owned by each reporting person<br>**26729880.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.6%** | Percent of class represented by amount in Row (11)<br>**25.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for 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. 6 (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 Quarterly 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.

| **CUSIP No.** | **64107A105** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**NPEH, LLC** | Name of reporting person<br>**NPEH, LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**26729880.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**26729880.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**26729880.00** | Aggregate amount beneficially owned by each reporting person<br>**26729880.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.6%** | Percent of class represented by amount in Row (11)<br>**25.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for 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.

| **CUSIP No.** | **64107A105** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**SK INC.** | Name of reporting person<br>**SK INC.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**M5** | Citizenship or place of organization<br>**M5** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** Row 8, 10, 11 and 13.

On July 30, 2025, SK Inc. ("SK"), which directly owned 100% of each of Tillandsia, Inc. ("Tillandsia"), Areca, Inc. ("Areca") and Chamaedorea, Inc. ("Chamaedoria"), sold its interests in each of Tillandsia, Areca and Chamaedorea to Damian Beauchamp ("Mr. Beauchamp") and 8RCH, LLC, a Delaware limited liability company ("8RCH"), (the "Sale"). Following the Sale, Mr. Beauchamp directly owns 50% of each of Tillandsia, Areca and Chamaedorea and 8RCH directly owns 50% of each of Tillandsia, Areca and Chamaedorea. Following the Sale, SK no longer beneficially owns 5% or greater of the Issuer's Class A Common Stock, and is therefore no longer a Reporting Person.

| **CUSIP No.** | **64107A105** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**TILLANDSIA, INC.** | Name of reporting person<br>**TILLANDSIA, INC.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** Row 8 and 10.

Mr. Beauchamp directly owns 50% of the outstanding equity of each of Tillandsia, Areca and Chamaedorea. 8RCH directly owns 50% of the outstanding equity of each of Tillandsia, Areca and Chamaedorea and Cynda Beauchamp ("Mrs. Beauchamp") directly owns 100% of the outstanding equity of 8RCH. 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 Mr. Beauchamp directly owns approximately 2.27% of the voting units of 8 Rivers. Thus, each of Mr. Beauchamp, Mrs. Beauchamp and 8RCH may be deemed to be a beneficial owner of the shares beneficially owned by 8 Rivers.  8 Rivers 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.

| **CUSIP No.** | **64107A105** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**ARECA, INC.** | Name of reporting person<br>**ARECA, INC.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** Row 8 and 10.

Mr. Beauchamp directly owns 50% of the outstanding equity of each of Tillandsia, Areca and Chamaedorea. 8RCH directly owns 50% of the outstanding equity of each of Tillandsia, Areca and Chamaedorea. 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 Mr. Beauchamp directly owns approximately 2.27% of the voting units of 8 Rivers. Thus, each of Mr. Beauchamp, Mrs. Beauchamp and 8RCH may be deemed to be a beneficial owner of the shares beneficially owned by 8 Rivers.  8 Rivers 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.

| **CUSIP No.** | **64107A105** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**CHAMAEDOREA, INC.** | Name of reporting person<br>**CHAMAEDOREA, INC.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** Row 8 and 10.

Mr. Beauchamp directly owns 50% of the outstanding equity of each of Tillandsia, Areca and Chamaedorea. 8RCH directly owns 50% of the outstanding equity of each of Tillandsia, Areca and Chamaedorea. 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 Mr. Beauchamp diretly owns approxiamtely 2.27% of the voting units of 8 Rivers. Thus, each of Mr. Beauchamp, Mrs. Beauchamp and 8RCH may be deemed to be a beneficial owner of the shares beneficially owned by 8 Rivers.  8 Rivers 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.

| **CUSIP No.** | **64107A105** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Damian Beauchamp** | Name of reporting person<br>**Damian Beauchamp** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**26729880.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**26729880.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**26729880.00** | Aggregate amount beneficially owned by each reporting person<br>**26729880.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.6%** | Percent of class represented by amount in Row (11)<br>**25.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** Rows 8, 10 and 11:

Mr. Beauchamp directly owns 50% of the outstanding equity of each of Tillandsia, Areca and Chamaedorea.  Mrs. Beauchamp directly owns 100% of the interests of 8RCH.  8RCH directly owns 50% of the outstanding equity of each of Tillandsia, Areca and Chamaedorea. Each of Tillandsia, Areca and Chamaedorea directly owns approximately 18.60%, 25.77% and 24.11%, respectively, or an aggregate of approximately 68.48% of the voting units of 8 Rivers and Mr. Beauchamp directly owns approximately 2.27% of the voting units of 8 Rivers.  8 Rivers owns approximately 91.4% of the outstanding equity of NPEH and is the manager of NPEH and may be deemed to beneficially own the 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.  Because of the foregoing relationships, each of Mr. Beauchamp, Mrs. Beauchamp and 8RCH may be deemed to beneficially own the shares of Class A Common Stock that may be beneficially owned by 8 Rivers.

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.

| **CUSIP No.** | **64107A105** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**8RCH, LLC** | Name of reporting person<br>**8RCH, LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**26729880.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**26729880.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**26729880.00** | Aggregate amount beneficially owned by each reporting person<br>**26729880.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.6%** | Percent of class represented by amount in Row (11)<br>**25.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** Rows 8, 10 and 11:

Mr. Beauchamp directly owns 50% of the outstanding equity of each of Tillandsia, Areca and Chamaedorea.  Mrs. Beauchamp directly owns 100% of the interests of 8RCH.  8RCH directly owns 50% of the outstanding equity of each of Tillandsia, Areca and Chamaedorea. Each of Tillandsia, Areca and Chamaedorea directly owns approximately 18.60%, 25.77% and 24.11%, respectively, or an aggregate of approximately 68.48% of the voting units of 8 Rivers and Mr. Beauchamp directly owns approximately 2.27% of the voting units of 8 Rivers.  8 Rivers owns approximately 91.4% of the outstanding equity of NPEH and is the manager of NPEH and may be deemed to beneficially own the 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.  Because of the foregoing relationships, each of Mr. Beauchamp, Mrs. Beauchamp and 8RCH may be deemed to beneficially own the shares of Class A Common Stock that may be beneficially owned by 8 Rivers.

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.

| **CUSIP No.** | **64107A105** |

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| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Cynda Beauchamp** | Name of reporting person<br>**Cynda Beauchamp** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**26729880.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**26729880.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**26729880.00** | Aggregate amount beneficially owned by each reporting person<br>**26729880.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.6%** | Percent of class represented by amount in Row (11)<br>**25.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** Rows 8, 10 and 11:

Mr. Beauchamp directly owns 50% of the outstanding equity of each of Tillandsia, Areca and Chamaedorea.  Mrs. Beauchamp directly owns 100% of the interests of 8RCH.  8RCH directly owns 50% of the outstanding equity of each of Tillandsia, Areca and Chamaedorea. Each of Tillandsia, Areca and Chamaedorea directly owns approximately 18.60%, 25.77% and 24.11%, respectively, or an aggregate of approximately 68.48% of the voting units of 8 Rivers and Mr. Beauchamp directly owns approximately 2.27% of the voting units of 8 Rivers.  8 Rivers owns approximately 91.4% of the outstanding equity of NPEH and is the manager of NPEH and may be deemed to beneficially own the 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.  Because of the foregoing relationships, each of Mr. Beauchamp, Mrs. Beauchamp and 8RCH may be deemed to beneficially own the shares of Class A Common Stock that may be beneficially owned by 8 Rivers.

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.

**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, NC, 27701

This Amendment No. 6 ("Amendment No. 6") 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, as amended by Amendment No. 4 on November 26, 2024 and as amended by Amendment No. 5 on July 17, 2025 (the "Schedule 13D").  Following the Sale, SK no longer beneficially owns 5% or greater of the Issuer's Class A Common Stock, and is therefore no longer a Reporting Person. Capitalized terms used but not defined in this Amendment No. 6 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 30, 2025, SK, which directly owned 100% of each of Tillandsia, Areca and Chamaedorea, sold its interests in each of Tillandsia, Areca and Chamaedorea to Mr. Beauchamp and 8RCH. Following the Sale, Mr. Beauchamp directly owns 50% of each of Tillandsia, Areca and Chamaedorea and 8RCH directly owns 50% of Tillandsia, Areca and Chamaedorea. Following the Sale, SK no longer beneficially owns 5% or greater of the Issuer's Class A Common Stock, and is therefore no longer a Reporting Person.

**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. 6 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.

**(b)**
—

**(c)**
Except as described in Schedule 13D and this Amendment No. 6, no transactions in the class of securities reported have been effected during the past sixty (60) days by the Reporting Persons.

### 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.

**Reporting Person:** 8 RIVERS CAPITAL, LLC

**Signature:** /s/ Min Lee

**Name/Title:** Min Lee, Acting General Counsel

**Date:** 07/30/2025

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.

**Reporting Person:** NPEH, LLC

**Signature:** /s/ Min Lee

**Name/Title:** Min Lee, Acting General Counsel

**Date:** 07/30/2025

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.

**Reporting Person:** SK INC.

**Signature:** /s/ Munhyuk Jang

**Name/Title:** Munhyuk Jang, Head of Corporate Management Department

**Date:** 07/30/2025

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.

**Reporting Person:** TILLANDSIA, INC.

**Signature:** /s/ Kiseon Park

**Name/Title:** Kiseon Park, President

**Date:** 07/30/2025

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.

**Reporting Person:** ARECA, INC.

**Signature:** /s/ Jae Hun Jang

**Name/Title:** Jae Hun Jang, President

**Date:** 07/30/2025

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.

**Reporting Person:** CHAMAEDOREA, INC.

**Signature:** /s/ Munhyuk Jang

**Name/Title:** Munhyuk Jang, Treasurer

**Date:** 07/30/2025

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.

**Reporting Person:** Damian Beauchamp

**Signature:** /s/ Damian Beauchamp

**Name/Title:** Damian Beauchamp

**Date:** 07/30/2025

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.

**Reporting Person:** 8RCH, LLC

**Signature:** /s/ Cynda Beauchamp

**Name/Title:** Cynda Beauchamp, President & Secretary

**Date:** 07/30/2025

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.

**Reporting Person:** Cynda Beauchamp

**Signature:** /s/ Cynda Beauchamp

**Name/Title:** Cynda Beauchamp

**Date:** 07/30/2025