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 |
|---|---|---|---|
| 4 | Insider transaction | Oct 8, 2026 | Apr 13, 2026 |
| 4 | Insider transaction | Sep 10, 2026 | Sep 8, 2026 |
| 4 | Insider transaction | Sep 10, 2026 | Sep 8, 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 |
| 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 |
| 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 |
| 4 | Insider transaction | Mar 10, 2026 | Mar 6, 2026 |
| 4 | Insider transaction | Mar 10, 2026 | Mar 6, 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 |
| 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 |
| 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 |
| 3 | Initial insider ownership | Aug 11, 2025 | Jul 30, 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 | — |
| 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 | — |
| 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 | — |
| 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 | — |
| 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 | — |
| 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 |
| 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 |
| 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 |
| 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 |
| 4 | Insider transaction | Sep 6, 2024 | Sep 3, 2024 |
| 4 | Insider transaction | Sep 6, 2024 | Sep 3, 2024 |
| 144 | Notice of proposed sale | Jul 26, 2024 | — |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 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 |
| 3 | Initial insider ownership | May 16, 2024 | May 8, 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 |
| 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 |
| 4 | Insider transaction | Oct 4, 2023 | Oct 2, 2023 |
| 4 | Insider transaction | Sep 14, 2023 | Sep 12, 2023 |
| 4 | Insider transaction | Sep 12, 2023 | Sep 8, 2023 |
| 4 | Insider transaction | Sep 8, 2023 | Sep 6, 2023 |
| 4 | Insider transaction | Sep 5, 2023 | Sep 1, 2023 |
| 4 | Insider transaction | Sep 5, 2023 | Sep 1, 2023 |
| 4 | Insider transaction | Sep 5, 2023 | Sep 1, 2023 |
| 4 | Insider transaction | Sep 5, 2023 | Sep 1, 2023 |
| 4 | Insider transaction | Sep 5, 2023 | Sep 1, 2023 |
| 4 | Insider transaction | Sep 1, 2023 | Aug 30, 2023 |
| 4 | Insider transaction | Aug 31, 2023 | Aug 29, 2023 |
| 4 | Insider transaction | Aug 30, 2023 | Aug 28, 2023 |
| 4 | Insider transaction | Aug 23, 2023 | Aug 21, 2023 |
| 4 | Insider transaction | Aug 21, 2023 | Aug 17, 2023 |
| 4 | Insider transaction | Aug 18, 2023 | Aug 16, 2023 |
| 4 | Insider transaction | Aug 11, 2023 | Aug 9, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Jun 30, 2023 | — |
| 4 | Insider transaction | Jun 30, 2023 | Jun 30, 2023 |
| 4 | Insider transaction | Jun 30, 2023 | Jun 30, 2023 |
| 3 | Initial insider ownership | Jun 20, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 20, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 20, 2023 | Jun 8, 2023 |
| SC 13D | Ownership over 5% (active) | Jun 20, 2023 | — |
| SC 13D | Ownership over 5% (active) | Jun 20, 2023 | — |
| SC 13D | Ownership over 5% (active) | Jun 20, 2023 | — |
| 3 | Initial insider ownership | Jun 20, 2023 | Jun 8, 2023 |
| SC 13G | Ownership over 5% (passive) | Jun 20, 2023 | — |
| 4 | Insider transaction | Jun 12, 2023 | Jun 8, 2023 |
| 4 | Insider transaction | Jun 12, 2023 | Jun 8, 2023 |
| 4 | Insider transaction | Jun 12, 2023 | Jun 8, 2023 |
| 4 | Insider transaction | Jun 12, 2023 | Jun 8, 2023 |
| 4 | Insider transaction | Jun 12, 2023 | Jun 8, 2023 |
| 4 | Insider transaction | Jun 12, 2023 | Jun 8, 2023 |
| 4 | Insider transaction | Jun 12, 2023 | Jun 8, 2023 |
| 4 | Insider transaction | Jun 12, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 12, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 12, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 12, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 12, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 12, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 12, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 12, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 12, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 12, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 12, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 12, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 12, 2023 | Jun 8, 2023 |
| 3 | Initial insider ownership | Jun 12, 2023 | Jun 8, 2023 |
| 4 | Insider transaction | Jun 12, 2023 | Jun 8, 2023 |
| 4 | Insider transaction | Jun 12, 2023 | Jun 8, 2023 |
| 4 | Insider transaction | Jun 12, 2023 | Jun 8, 2023 |
| 4 | Insider transaction | Jun 12, 2023 | Jun 8, 2023 |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Jun 22, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Feb 11, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Jun 28, 2021 | — |
| 3 | Initial insider ownership | Jun 15, 2021 | Jun 15, 2021 |
| 3 | Initial insider ownership | Jun 15, 2021 | Jun 15, 2021 |
| 3 | Initial insider ownership | Jun 15, 2021 | Jun 15, 2021 |
| 3 | Initial insider ownership | Jun 15, 2021 | Jun 15, 2021 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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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.