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 |
|---|---|---|---|
| DEF 14A | Proxy statement | Aug 24, 2026 | Dec 31, 2025 |
| PRE 14A | Preliminary proxy statement | Aug 14, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Oct 27, 2025 | — |
| DEFA14A | Additional proxy material | Oct 20, 2025 | — |
| DEF 14A | Proxy statement | Oct 14, 2025 | Oct 14, 2025 |
| PRE 14A | Preliminary proxy statement | Oct 3, 2025 | Oct 3, 2025 |
| DEF 14A | Proxy statement | Jul 21, 2025 | Jul 21, 2025 |
| PRE 14A | Preliminary proxy statement | Jul 9, 2025 | Dec 31, 2024 |
| DEF 14A | Proxy statement | Oct 28, 2024 | Oct 28, 2024 |
| PRE 14A | Preliminary proxy statement | Oct 17, 2024 | Oct 17, 2024 |
| DEF 14A | Proxy statement | Apr 29, 2024 | Apr 29, 2024 |
| PRE 14A | Preliminary proxy statement | Apr 19, 2024 | Apr 19, 2024 |
| DEF 14A | Proxy statement | May 30, 2023 | May 30, 2023 |
| PRE 14A | Preliminary proxy statement | May 19, 2023 | May 19, 2023 |
| DEF 14A | Proxy statement | Feb 10, 2023 | Feb 10, 2023 |
| PRE 14A | Preliminary proxy statement | Jan 25, 2023 | Jan 25, 2023 |
| DEF 14A | Proxy statement | Sep 19, 2022 | Sep 29, 2022 |
| PRE 14A | Preliminary proxy statement | Sep 6, 2022 | Sep 6, 2022 |
| DEFA14A | Additional proxy material | Apr 13, 2022 | — |
| DEF 14A | Proxy statement | Apr 13, 2022 | May 27, 2022 |
| DEF 14A | Proxy statement | Oct 7, 2021 | Oct 29, 2021 |
| PREM14A | Pre 14a | Aug 30, 2021 | Aug 30, 2021 |
| DEFA14A | Additional proxy material | Aug 12, 2021 | — |
| DEF 14A | Proxy statement | May 18, 2021 | Jun 9, 2021 |
| DEFA14A | Additional proxy material | May 18, 2021 | — |
| PRE 14A | Preliminary proxy statement | Apr 30, 2021 | Jun 9, 2021 |
| DEF 14A | Proxy statement | Feb 22, 2021 | Mar 25, 2021 |
| PRE 14A | Preliminary proxy statement | Feb 12, 2021 | Mar 25, 2021 |
| DEF 14A | Proxy statement | Apr 20, 2018 | Jun 6, 2018 |
| PRE 14A | Preliminary proxy statement | Jan 17, 2018 | Jan 17, 2018 |
| DEF 14A | Proxy statement | Apr 21, 2017 | Jun 7, 2017 |
| DEF 14A | Proxy statement | Apr 22, 2016 | Jun 8, 2016 |
| DEF 14A | Proxy statement | Apr 24, 2015 | Jun 11, 2015 |
| DEF 14A | Proxy statement | Apr 25, 2014 | Jun 11, 2014 |
| DEF 14A | Proxy statement | Apr 26, 2013 | Jun 12, 2013 |
| DEF 14A | Proxy statement | Apr 27, 2012 | Jun 14, 2012 |
| DEF 14A | Proxy statement | Apr 28, 2011 | Jun 16, 2011 |
| DEF 14A | Proxy statement | Apr 28, 2010 | Jun 17, 2010 |
| DEF 14A | Proxy statement | Apr 30, 2009 | Jun 18, 2009 |
| DEF 14A | Proxy statement | Apr 8, 2008 | May 15, 2008 |
| PRE 14A | Preliminary proxy statement | Mar 27, 2008 | May 15, 2008 |
Showing 41 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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
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.