Soluna Holdings, Inc SEC filings SLNH
Soluna Holdings, Inc has 1,001 filings in SEC EDGAR's recent list, going back to Dec 26, 2007. Its latest annual report, Form ARS, was filed on Aug 24, 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 26, 2026 (regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 27, 2026 | — |
| 3 | Initial insider ownership | Oct 26, 2026 | Oct 16, 2026 |
| 4 | Insider transaction | Sep 24, 2026 | Sep 23, 2026 |
| 4 | Insider transaction | Sep 17, 2026 | Sep 1, 2026 |
| 4 | Insider transaction | Sep 17, 2026 | Sep 1, 2026 |
| 4 | Insider transaction | Sep 4, 2026 | Sep 3, 2026 |
| 144 | Notice of proposed sale | Sep 3, 2026 | — |
| 4 | Insider transaction | Sep 1, 2026 | Aug 28, 2026 |
| 4 | Insider transaction | Sep 1, 2026 | Sep 1, 2026 |
| 144 | Notice of proposed sale | Sep 1, 2026 | — |
| 4 | Insider transaction | Aug 31, 2026 | Aug 28, 2026 |
| 4 | Insider transaction | Aug 27, 2026 | Aug 26, 2026 |
| 4 | Insider transaction | Aug 27, 2026 | Aug 25, 2026 |
| 4 | Insider transaction | Aug 25, 2026 | Aug 21, 2026 |
| 4 | Insider transaction | Aug 24, 2026 | Aug 20, 2026 |
| 4 | Insider transaction | Aug 21, 2026 | Aug 19, 2026 |
| 144 | Notice of proposed sale | Aug 19, 2026 | — |
| 4 | Insider transaction | Aug 18, 2026 | Aug 17, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 5, 2026 | — |
| 4 | Insider transaction | Aug 4, 2026 | Aug 1, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 30, 2026 | — |
| 3 | Initial insider ownership | Jul 21, 2026 | Jul 13, 2026 |
| 4 | Insider transaction | Jun 22, 2026 | Jun 17, 2026 |
| 4 | Insider transaction | Jun 17, 2026 | Jun 15, 2026 |
| 144 | Notice of proposed sale | Jun 17, 2026 | — |
| 4 | Insider transaction | Jun 12, 2026 | Jun 10, 2026 |
| 4 | Insider transaction | Jun 12, 2026 | Jun 10, 2026 |
| 4 | Insider transaction | Jun 10, 2026 | Jun 8, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 1, 2026 | Jun 1, 2026 |
| 144 | Notice of proposed sale | Jun 1, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 26, 2026 | — |
| 4 | Insider transaction | May 22, 2026 | May 21, 2026 |
| 4 | Insider transaction | Apr 8, 2026 | Apr 6, 2026 |
| 144 | Notice of proposed sale | Apr 6, 2026 | — |
| 3 | Initial insider ownership | Apr 1, 2026 | Apr 1, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 11, 2026 | — |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Dec 17, 2025 | Dec 16, 2025 |
| 144 | Notice of proposed sale | Dec 16, 2025 | — |
| 4 | Insider transaction | Dec 15, 2025 | Dec 12, 2025 |
| 4 | Insider transaction | Dec 12, 2025 | Dec 10, 2025 |
| 4 | Insider transaction | Dec 12, 2025 | Dec 10, 2025 |
| 4/A | Filing | Dec 11, 2025 | Dec 1, 2025 |
| 4/A | Filing | Dec 11, 2025 | Dec 1, 2025 |
| 144 | Notice of proposed sale | Dec 11, 2025 | — |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 2, 2025 | Nov 28, 2025 |
| 4 | Insider transaction | Nov 25, 2025 | Nov 21, 2025 |
| 4 | Insider transaction | Nov 25, 2025 | Nov 21, 2025 |
| 4 | Insider transaction | Nov 21, 2025 | Nov 19, 2025 |
| 144 | Notice of proposed sale | Nov 21, 2025 | — |
| 144 | Notice of proposed sale | Nov 19, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 12, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 7, 2025 | — |
| 4 | Insider transaction | Oct 30, 2025 | Oct 15, 2025 |
| 3 | Initial insider ownership | Oct 30, 2025 | Oct 15, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Sep 18, 2025 | — |
| 4 | Insider transaction | Sep 2, 2025 | Sep 1, 2025 |
| 4 | Insider transaction | Sep 2, 2025 | Sep 1, 2025 |
| 4 | Insider transaction | Sep 2, 2025 | Sep 1, 2025 |
| 4 | Insider transaction | Sep 2, 2025 | Sep 1, 2025 |
| 4 | Insider transaction | Sep 2, 2025 | Sep 1, 2025 |
| 4 | Insider transaction | Sep 2, 2025 | Sep 1, 2025 |
| 4 | Insider transaction | Sep 2, 2025 | Sep 1, 2025 |
| 4 | Insider transaction | Sep 2, 2025 | Sep 1, 2025 |
| 4 | Insider transaction | Sep 2, 2025 | Sep 1, 2025 |
| 4 | Insider transaction | Sep 2, 2025 | Sep 1, 2025 |
| 4 | Insider transaction | Sep 2, 2025 | Sep 1, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 18, 2025 | — |
| 4 | Insider transaction | Jun 12, 2025 | Jun 10, 2025 |
| 4 | Insider transaction | Jun 12, 2025 | Jun 10, 2025 |
| 4 | Insider transaction | Jun 12, 2025 | Jun 10, 2025 |
| 144 | Notice of proposed sale | Jun 11, 2025 | — |
| 144 | Notice of proposed sale | Jun 10, 2025 | — |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | Jun 1, 2025 |
| 4 | Insider transaction | May 22, 2025 | May 22, 2025 |
| 4 | Insider transaction | May 22, 2025 | May 20, 2025 |
| 4 | Insider transaction | Mar 28, 2025 | Oct 31, 2024 |
| 4 | Insider transaction | Mar 28, 2025 | Oct 31, 2024 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 6, 2025 | — |
| 4 | Insider transaction | Dec 12, 2024 | Dec 10, 2024 |
| 4 | Insider transaction | Dec 12, 2024 | Dec 10, 2024 |
| 4 | Insider transaction | Dec 10, 2024 | Dec 6, 2024 |
| 4 | Insider transaction | Dec 9, 2024 | Dec 5, 2024 |
| 4 | Insider transaction | Dec 3, 2024 | Dec 1, 2024 |
| 4 | Insider transaction | Dec 3, 2024 | Dec 1, 2024 |
| 4 | Insider transaction | Dec 3, 2024 | Dec 1, 2024 |
| 4 | Insider transaction | Dec 3, 2024 | Dec 1, 2024 |
| 4 | Insider transaction | Dec 3, 2024 | Dec 1, 2024 |
| 4 | Insider transaction | Dec 3, 2024 | Dec 1, 2024 |
| 4 | Insider transaction | Dec 3, 2024 | Dec 1, 2024 |
| 4 | Insider transaction | Dec 3, 2024 | Dec 1, 2024 |
| 4 | Insider transaction | Dec 3, 2024 | Dec 1, 2024 |
| 4 | Insider transaction | Dec 3, 2024 | Dec 1, 2024 |
| 4 | Insider transaction | Dec 3, 2024 | Dec 1, 2024 |
| 4 | Insider transaction | Dec 3, 2024 | Dec 1, 2024 |
| 4 | Insider transaction | Nov 25, 2024 | Nov 21, 2024 |
| 4 | Insider transaction | Nov 21, 2024 | Nov 19, 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 21, 2024 | — |
| 4 | Insider transaction | Nov 12, 2024 | Nov 8, 2024 |
| 4 | Insider transaction | Nov 12, 2024 | Nov 8, 2024 |
| 4 | Insider transaction | Nov 7, 2024 | Nov 5, 2024 |
| 4 | Insider transaction | Nov 7, 2024 | Nov 5, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Sep 1, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Sep 1, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Sep 1, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Sep 1, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Sep 1, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Sep 1, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Sep 1, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Sep 1, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Sep 1, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Sep 1, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Sep 1, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Sep 1, 2024 |
| 4 | Insider transaction | Jun 20, 2024 | Jun 18, 2024 |
| 4 | Insider transaction | Jun 20, 2024 | Jun 18, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 1, 2024 |
| 4 | Insider transaction | Jun 5, 2024 | Jun 1, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Apr 26, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Apr 25, 2024 | — |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| 3 | Initial insider ownership | Apr 12, 2024 | Apr 8, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 6, 2024 | — |
| 4 | Insider transaction | Dec 15, 2023 | Dec 13, 2023 |
| 4 | Insider transaction | Dec 13, 2023 | Dec 12, 2023 |
| 4 | Insider transaction | Dec 13, 2023 | Dec 12, 2023 |
| 144 | Notice of proposed sale | Dec 12, 2023 | — |
| 144 | Notice of proposed sale | Nov 27, 2023 | — |
| SC 13D/A | Amended ownership over 5% (active) | Sep 5, 2023 | — |
| SC 13D | Ownership over 5% (active) | Aug 1, 2023 | — |
| 144 | Notice of proposed sale | Jun 5, 2023 | — |
| 4/A | Filing | May 31, 2023 | May 30, 2023 |
| 4/A | Filing | May 31, 2023 | May 30, 2023 |
| 4/A | Filing | Apr 18, 2023 | Apr 14, 2023 |
| 4/A | Filing | Apr 18, 2023 | Apr 14, 2023 |
| SC 13G | Ownership over 5% (passive) | Mar 30, 2023 | — |
| 4 | Insider transaction | Mar 23, 2023 | Mar 21, 2023 |
| 4 | Insider transaction | Mar 23, 2023 | Mar 21, 2023 |
| 4 | Insider transaction | Mar 23, 2023 | Mar 21, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 16, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 24, 2023 | — |
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
- Finance Services (SIC 6199)
- Listed as
- SLNH (Nasdaq), SLNHP (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- NV
- Headquarters
- Albany, NY
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 64463
- Former names
- MECHANICAL TECHNOLOGY INC (until Oct 29, 2021)
Other Finance Services companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.