Tantech Holdings Ltd SEC filings TANH
Tantech Holdings Ltd has 294 filings in SEC EDGAR's recent list, going back to Sep 30, 2013. Its latest annual report, Form 20-F, was filed on May 14, 2026 for the period ended Dec 31, 2025. The most recent current report (Form 6-K) was filed on Oct 2, 2026. The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 3 | Initial insider ownership | Apr 9, 2026 | May 29, 2025 |
| 3 | Initial insider ownership | Mar 31, 2026 | May 26, 2023 |
| 3 | Initial insider ownership | Mar 31, 2026 | Jul 1, 2014 |
| 3 | Initial insider ownership | Mar 31, 2026 | Jul 1, 2014 |
| 3 | Initial insider ownership | Mar 17, 2026 | Jun 29, 2013 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 21, 2025 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 13, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 6, 2024 | — |
| SC 13G | Ownership over 5% (passive) | May 8, 2024 | — |
| SC 13G | Ownership over 5% (passive) | May 3, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Oct 16, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Oct 13, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Oct 12, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Oct 12, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Oct 12, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Oct 12, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Oct 10, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 10, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 5, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Dec 9, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Nov 30, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 6, 2020 | — |
| 144 | Notice of proposed sale | Aug 28, 2017 | — |
| SC 13D | Ownership over 5% (active) | May 11, 2016 | — |
| SC 13G | Ownership over 5% (passive) | Feb 17, 2016 | — |
Showing 25 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
- Industrial Organic Chemicals (SIC 2860)
- Listed as
- TANH (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- Virgin Islands, British
- Headquarters
- Zhejiang, China
- SEC filer status
- Non-accelerated filer
- SEC CIK
- 1588084
Other Industrial Organic Chemicals companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.