Net Power Inc. SEC filings NPWR
Net Power Inc. has 350 filings in SEC EDGAR's recent list, going back to Mar 10, 2021. Its latest annual report, Form ARS, was filed on Apr 23, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 13, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 22, 2026 (material agreement). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 8-K |
Current report
Material agreement
|
Oct 22, 2026 | Oct 16, 2026 |
| 4 | Insider transaction | Oct 8, 2026 | Apr 13, 2026 |
| 8-K |
Current report
Material agreement
|
Sep 11, 2026 | Sep 8, 2026 |
| 4 | Insider transaction | Sep 10, 2026 | Sep 8, 2026 |
| 4 | Insider transaction | Sep 10, 2026 | Sep 8, 2026 |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, Regulation FD disclosure
|
Sep 3, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Aug 31, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Aug 31, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Aug 31, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Aug 31, 2026 | Jun 3, 2026 |
| 4 | Insider transaction | Aug 27, 2026 | Aug 25, 2026 |
| 4 | Insider transaction | Aug 27, 2026 | Aug 25, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Aug 17, 2026 | — |
| 4 | Insider transaction | Aug 14, 2026 | Aug 12, 2026 |
| 4 | Insider transaction | Aug 14, 2026 | Aug 12, 2026 |
| 10-Q | Quarterly report | Aug 13, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 13, 2026 | Aug 13, 2026 |
| 4 | Insider transaction | Aug 11, 2026 | Aug 7, 2026 |
| 4 | Insider transaction | Aug 11, 2026 | Aug 7, 2026 |
| 4 | Insider transaction | Aug 6, 2026 | Aug 4, 2026 |
| 4 | Insider transaction | Aug 6, 2026 | Aug 4, 2026 |
| 4 | Insider transaction | Jul 30, 2026 | Jul 28, 2026 |
| 4 | Insider transaction | Jul 30, 2026 | Jul 28, 2026 |
| 4 | Insider transaction | Jul 23, 2026 | Jul 21, 2026 |
| 4 | Insider transaction | Jul 23, 2026 | Jul 21, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Jun 5, 2026 | Jun 3, 2026 |
| 3 | Initial insider ownership | May 27, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 14, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 14, 2026 | May 12, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | May 14, 2026 | — |
| 4/A | Ownership document | May 13, 2026 | Mar 6, 2026 |
| 4/A | Ownership document | May 13, 2026 | Mar 6, 2026 |
| 10-Q | Quarterly report | May 11, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 11, 2026 | May 11, 2026 |
| ARS | Annual report to shareholders | Apr 23, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 23, 2026 | — |
| DEF 14A | Proxy statement | Apr 23, 2026 | Jun 3, 2026 |
| 8-K |
Current report
Officer or director change
|
Apr 13, 2026 | Apr 10, 2026 |
| 4 | Insider transaction | Mar 10, 2026 | Mar 6, 2026 |
| 4 | Insider transaction | Mar 10, 2026 | Mar 6, 2026 |
| 10-K | Annual report | Mar 9, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 9, 2026 | Mar 9, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 3, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 3, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 26, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 26, 2026 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 23, 2026 | Feb 19, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 13, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 13, 2026 |
| 4 | Insider transaction | Feb 12, 2026 | Feb 10, 2026 |
| 4 | Insider transaction | Feb 12, 2026 | Feb 10, 2026 |
| 4 | Insider transaction | Feb 2, 2026 | Jan 29, 2026 |
| 4 | Insider transaction | Feb 2, 2026 | Jan 29, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Jan 28, 2026 | — |
| 4 | Insider transaction | Jan 28, 2026 | Jan 26, 2026 |
| 4 | Insider transaction | Jan 28, 2026 | Jan 26, 2026 |
| 4 | Insider transaction | Jan 16, 2026 | Jan 14, 2026 |
| 4 | Insider transaction | Jan 16, 2026 | Jan 14, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 5, 2026 | Dec 29, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 24, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 24, 2025 |
| 4 | Insider transaction | Dec 23, 2025 | Dec 19, 2025 |
| 4 | Insider transaction | Dec 23, 2025 | Dec 19, 2025 |
| 4 | Insider transaction | Dec 11, 2025 | Dec 9, 2025 |
| 4 | Insider transaction | Dec 11, 2025 | Dec 9, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Dec 9, 2025 | — |
| 4 | Insider transaction | Dec 8, 2025 | Dec 4, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 4, 2025 |
| 4 | Insider transaction | Dec 2, 2025 | Nov 28, 2025 |
| 4 | Insider transaction | Dec 2, 2025 | Nov 28, 2025 |
| 4 | Insider transaction | Nov 24, 2025 | Nov 20, 2025 |
| 4 | Insider transaction | Nov 24, 2025 | Nov 20, 2025 |
| 4 | Insider transaction | Nov 19, 2025 | Nov 17, 2025 |
| 4 | Insider transaction | Nov 19, 2025 | Nov 17, 2025 |
| 10-Q | Quarterly report | Nov 13, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 13, 2025 | Nov 13, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Nov 4, 2025 | — |
| 4 | Insider transaction | Nov 4, 2025 | Oct 31, 2025 |
| 4 | Insider transaction | Nov 4, 2025 | Oct 31, 2025 |
| 4 | Insider transaction | Nov 4, 2025 | Oct 31, 2025 |
| 4 | Insider transaction | Oct 30, 2025 | Oct 28, 2025 |
| 4 | Insider transaction | Oct 30, 2025 | Oct 28, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Oct 29, 2025 | — |
| 4 | Insider transaction | Oct 27, 2025 | Oct 23, 2025 |
| 4 | Insider transaction | Oct 27, 2025 | Oct 23, 2025 |
| 4 | Insider transaction | Oct 22, 2025 | Oct 20, 2025 |
| 4 | Insider transaction | Oct 22, 2025 | Oct 20, 2025 |
| 4 | Insider transaction | Oct 16, 2025 | Oct 14, 2025 |
| 4 | Insider transaction | Oct 16, 2025 | Oct 14, 2025 |
| 10-Q | Quarterly report | Aug 11, 2025 | Jun 30, 2025 |
| 3 | Initial insider ownership | Aug 11, 2025 | Jul 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2025 | Aug 11, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Aug 1, 2025 | — |
| 4 | Insider transaction | Jul 31, 2025 | Jul 30, 2025 |
| 4 | Insider transaction | Jul 17, 2025 | Jul 15, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Jul 17, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Jul 15, 2025 | Jul 10, 2025 |
| 8-K |
Current report
Agreement ended
|
Jun 20, 2025 | Jun 12, 2025 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 6, 2025 | Jun 3, 2025 |
| 4 | Insider transaction | Jun 5, 2025 | Jun 3, 2025 |
| 4 | Insider transaction | Jun 5, 2025 | Jun 3, 2025 |
| 4 | Insider transaction | Jun 5, 2025 | Jun 3, 2025 |
| 4 | Insider transaction | Jun 5, 2025 | Jun 3, 2025 |
| 4 | Insider transaction | Jun 4, 2025 | Jun 2, 2025 |
| 3 | Initial insider ownership | Jun 4, 2025 | Apr 15, 2025 |
| 144 | Notice of proposed sale | May 30, 2025 | — |
| 10-Q | Quarterly report | May 12, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 12, 2025 | May 12, 2025 |
| ARS | Annual report to shareholders | Apr 24, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Apr 24, 2025 | — |
| DEF 14A | Proxy statement | Apr 24, 2025 | Jun 3, 2025 |
| 8-K |
Current report
Officer or director change
|
Apr 15, 2025 | Apr 14, 2025 |
| 4 | Insider transaction | Apr 11, 2025 | Apr 9, 2025 |
| 4 | Insider transaction | Apr 7, 2025 | Apr 2, 2025 |
| 4 | Insider transaction | Apr 4, 2025 | Apr 2, 2025 |
| 4 | Insider transaction | Apr 4, 2025 | Apr 2, 2025 |
| 144 | Notice of proposed sale | Apr 3, 2025 | — |
| 8-K |
Current report
Auditor change
|
Mar 21, 2025 | Mar 17, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 10, 2025 | Mar 10, 2025 |
| 10-K | Annual report | Mar 10, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Jan 6, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Nov 26, 2024 | Nov 22, 2024 |
| 4 | Insider transaction | Nov 26, 2024 | Nov 22, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Nov 26, 2024 | — |
| 4 | Insider transaction | Nov 26, 2024 | Nov 22, 2024 |
| 144 | Notice of proposed sale | Nov 22, 2024 | — |
| EFFECT | Filing | Nov 21, 2024 | — |
| 4 | Insider transaction | Nov 21, 2024 | Nov 19, 2024 |
| 4 | Insider transaction | Nov 21, 2024 | Nov 19, 2024 |
| 144 | Notice of proposed sale | Nov 19, 2024 | — |
| CORRESP | Letter to the SEC | Nov 19, 2024 | — |
| UPLOAD | Letter from the SEC | Nov 19, 2024 | — |
| S-3 | Shelf registration | Nov 15, 2024 | — |
| 8-K |
Current report
Results of operations
|
Nov 12, 2024 | Nov 11, 2024 |
| 10-Q | Quarterly report | Nov 12, 2024 | Sep 30, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Oct 21, 2024 | — |
| 4 | Insider transaction | Oct 18, 2024 | Oct 16, 2024 |
| 4 | Insider transaction | Oct 18, 2024 | Oct 16, 2024 |
| 4 | Insider transaction | Oct 11, 2024 | Oct 9, 2024 |
| 4 | Insider transaction | Oct 11, 2024 | Oct 9, 2024 |
| 4 | Insider transaction | Oct 11, 2024 | Oct 11, 2024 |
| 4 | Insider transaction | Oct 7, 2024 | Sep 25, 2024 |
| 4 | Insider transaction | Oct 7, 2024 | Sep 25, 2024 |
| 8-K |
Current report
Material agreement
|
Oct 4, 2024 | Sep 30, 2024 |
| 4 | Insider transaction | Oct 2, 2024 | Sep 30, 2024 |
| 4/A | Ownership document | Oct 2, 2024 | Sep 20, 2024 |
| 4 | Insider transaction | Sep 24, 2024 | Sep 20, 2024 |
| UPLOAD | Letter from the SEC | Sep 24, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Sep 23, 2024 | — |
| 4 | Insider transaction | Sep 19, 2024 | Sep 17, 2024 |
| 4 | Insider transaction | Sep 19, 2024 | Sep 17, 2024 |
| CORRESP | Letter to the SEC | Sep 18, 2024 | — |
| 4 | Insider transaction | Sep 16, 2024 | Sep 12, 2024 |
| 4 | Insider transaction | Sep 16, 2024 | Sep 12, 2024 |
| 4 | Insider transaction | Sep 11, 2024 | Sep 9, 2024 |
| 4 | Insider transaction | Sep 11, 2024 | Sep 9, 2024 |
| UPLOAD | Letter from the SEC | Sep 11, 2024 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 10, 2024 | Sep 10, 2024 |
| 4 | Insider transaction | Sep 6, 2024 | Sep 3, 2024 |
| 4 | Insider transaction | Sep 6, 2024 | Sep 3, 2024 |
| CORRESP | Letter to the SEC | Aug 27, 2024 | — |
| UPLOAD | Letter from the SEC | Aug 21, 2024 | — |
| 10-Q | Quarterly report | Aug 12, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2024 | Aug 12, 2024 |
| 144 | Notice of proposed sale | Jul 26, 2024 | — |
| 424B3 | Prospectus | Jul 8, 2024 | — |
| EFFECT | Filing | Jul 5, 2024 | — |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| POS AM | Registration statement | Jul 1, 2024 | — |
| 8-K |
Current report
Shareholder vote results
|
Jun 10, 2024 | Jun 4, 2024 |
| 4 | Insider transaction | Jun 6, 2024 | Jun 4, 2024 |
| 4 | Insider transaction | Jun 6, 2024 | Jun 4, 2024 |
| 4 | Insider transaction | Jun 6, 2024 | Jun 4, 2024 |
| 4 | Insider transaction | Jun 6, 2024 | Jun 4, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | May 28, 2024 | — |
| 4 | Insider transaction | May 28, 2024 | May 23, 2024 |
| 424B3 | Prospectus | May 24, 2024 | — |
| EFFECT | Filing | May 22, 2024 | — |
| POS AM | Post-effective registration statement | May 17, 2024 | — |
| 3 | Initial insider ownership | May 16, 2024 | May 8, 2024 |
| 424B3 | Prospectus | May 13, 2024 | — |
| 10-Q | Quarterly report | May 13, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 13, 2024 | May 13, 2024 |
| 424B3 | Prospectus | Apr 29, 2024 | — |
| DEF 14A | Proxy statement | Apr 26, 2024 | Jun 4, 2024 |
| 4 | Insider transaction | Apr 4, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 4, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 3, 2024 | Apr 1, 2024 |
| POS EX | Post-effective amendment no. 1 to form s-1 | Mar 13, 2024 | — |
| 424B3 | Prospectus | Mar 13, 2024 | — |
| 10-K | Annual report | Mar 11, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Mar 11, 2024 | Mar 11, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 7, 2024 | — |
| 4 | Insider transaction | Jan 4, 2024 | Jan 2, 2024 |
| 424B3 | Prospectus | Nov 14, 2023 | — |
| 10-Q | Quarterly report | Nov 14, 2023 | Sep 30, 2023 |
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Company profile
- Industry
- Electrical Industrial Apparatus (SIC 3620)
- Listed as
- NPWR (NYSE), NPWR-WT (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Houston, TX
- SEC filer status
- , Emerging growth company
- SEC CIK
- 1845437
- Former names
- Rice Acquisition Corp. II (until Jun 7, 2023)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.