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 |
|---|---|---|---|
| EFFECT | Filing | May 8, 2026 | — |
| CORRESP | Letter to the SEC | May 6, 2026 | — |
| UPLOAD | Letter from the SEC | May 6, 2026 | — |
| EFFECT | Filing | Apr 21, 2026 | — |
| EFFECT | Filing | Apr 17, 2026 | — |
| CORRESP | Letter to the SEC | Apr 17, 2026 | — |
| UPLOAD | Letter from the SEC | Apr 17, 2026 | — |
| CORRESP | Letter to the SEC | Apr 15, 2026 | — |
| UPLOAD | Letter from the SEC | Apr 7, 2026 | — |
| DRS | Filing | Apr 1, 2026 | — |
| EFFECT | Filing | Mar 30, 2026 | — |
| CORRESP | Letter to the SEC | Mar 26, 2026 | — |
| UPLOAD | Letter from the SEC | Jan 15, 2026 | — |
| DRS | Filing | Jan 12, 2026 | — |
| UPLOAD | Letter from the SEC | Sep 29, 2025 | — |
| EFFECT | Filing | Jul 15, 2025 | — |
| EFFECT | Filing | Apr 29, 2025 | — |
| EFFECT | Filing | Apr 25, 2025 | — |
| CORRESP | Letter to the SEC | Apr 25, 2025 | — |
| UPLOAD | Letter from the SEC | Apr 25, 2025 | — |
| EFFECT | Filing | Feb 5, 2025 | — |
| CORRESP | Letter to the SEC | Feb 3, 2025 | — |
| CORRESP | Letter to the SEC | Jan 28, 2025 | — |
| UPLOAD | Letter from the SEC | Jan 27, 2025 | — |
| CORRESP | Letter to the SEC | Jan 15, 2025 | — |
| UPLOAD | Letter from the SEC | Jan 14, 2025 | — |
| CORRESP | Letter to the SEC | Dec 16, 2024 | — |
| UPLOAD | Letter from the SEC | Dec 5, 2024 | — |
| CORRESP | Letter to the SEC | Nov 12, 2024 | — |
| UPLOAD | Letter from the SEC | Nov 1, 2024 | — |
| D | Filing | Dec 20, 2022 | — |
| D | Filing | Dec 20, 2022 | — |
| D | Filing | Nov 7, 2022 | — |
| D | Filing | Oct 24, 2022 | — |
| D | Filing | Aug 3, 2022 | — |
| EFFECT | Filing | Feb 14, 2022 | — |
| CORRESP | Letter to the SEC | Feb 11, 2022 | — |
| CORRESP | Letter to the SEC | Feb 11, 2022 | — |
| CORRESP | Letter to the SEC | Feb 11, 2022 | — |
| UPLOAD | Letter from the SEC | Feb 10, 2022 | — |
| EFFECT | Filing | Dec 16, 2021 | — |
| CORRESP | Letter to the SEC | Dec 14, 2021 | — |
| UPLOAD | Letter from the SEC | Dec 6, 2021 | — |
| D | Filing | Nov 12, 2021 | — |
| D | Filing | Nov 12, 2021 | — |
| UPLOAD | Letter from the SEC | Oct 7, 2021 | — |
| PRER14A | Filing | Sep 27, 2021 | — |
| CORRESP | Letter to the SEC | Sep 24, 2021 | — |
| UPLOAD | Letter from the SEC | Sep 10, 2021 | — |
| CERT | Filing | Aug 19, 2021 | — |
| 8-A12B | Filing | Aug 19, 2021 | — |
| EFFECT | Filing | Aug 18, 2021 | — |
| CORRESP | Letter to the SEC | Aug 16, 2021 | — |
| CORRESP | Letter to the SEC | Aug 16, 2021 | — |
| UPLOAD | Letter from the SEC | Jun 29, 2021 | — |
| SD | Specialized disclosure (conflict minerals) | Jun 1, 2021 | — |
| EFFECT | Filing | Apr 26, 2021 | — |
| CORRESP | Letter to the SEC | Apr 22, 2021 | — |
| CORRESP | Letter to the SEC | Apr 22, 2021 | — |
| CERT | Filing | Mar 22, 2021 | — |
| 8-A12B | Filing | Mar 22, 2021 | — |
| UPLOAD | Letter from the SEC | Mar 17, 2021 | — |
| UPLOAD | Letter from the SEC | Jan 6, 2021 | — |
| 10-12G/A | Filing | Jan 4, 2021 | — |
| CORRESP | Letter to the SEC | Dec 22, 2020 | — |
| D | Filing | Dec 18, 2020 | — |
| UPLOAD | Letter from the SEC | Dec 9, 2020 | — |
| 10-12G/A | Filing | Nov 25, 2020 | — |
| UPLOAD | Letter from the SEC | Nov 18, 2020 | — |
| UPLOAD | Letter from the SEC | Oct 28, 2020 | — |
| 10-12G | Filing | Sep 30, 2020 | — |
| CT ORDER | Filing | Jun 24, 2020 | — |
| RW | Filing | Apr 3, 2020 | — |
| 10-12G | Filing | Mar 4, 2020 | — |
| AW | Filing | Aug 17, 2018 | — |
| AW | Filing | Aug 17, 2018 | — |
| AW | Filing | Aug 17, 2018 | — |
| AW | Filing | Aug 17, 2018 | — |
| D | Filing | Apr 18, 2018 | — |
| 15-12G | Deregistration | Mar 19, 2018 | — |
| EFFECT | Filing | Mar 16, 2018 | — |
| EFFECT | Filing | Mar 16, 2018 | — |
| EFFECT | Filing | Mar 16, 2018 | — |
| EFFECT | Filing | Mar 16, 2018 | — |
| CORRESP | Letter to the SEC | Mar 7, 2018 | — |
| UPLOAD | Letter from the SEC | Feb 15, 2018 | — |
| SD | Specialized disclosure (conflict minerals) | May 26, 2017 | — |
| EFFECT | Filing | May 10, 2017 | — |
| CORRESP | Letter to the SEC | May 8, 2017 | — |
| CORRESP | Letter to the SEC | May 5, 2017 | — |
| D | Filing | Oct 24, 2016 | — |
| 8-A12G/A | Filing | Oct 21, 2016 | — |
| 8-A12G | Filing | Oct 6, 2016 | — |
| CT ORDER | Filing | Sep 19, 2016 | — |
| SD | Specialized disclosure (conflict minerals) | May 27, 2016 | — |
| SD | Specialized disclosure (conflict minerals) | Jun 1, 2015 | — |
| SD | Specialized disclosure (conflict minerals) | Jun 2, 2014 | — |
| 25 | Notification of removal from listing and/or registration | Apr 16, 2009 | — |
| RW | Seccorrespondence-091808a | Sep 19, 2008 | — |
Showing 99 filings. 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.