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 |
|---|---|---|---|
| F-3 | Shelf registration (foreign issuer) | Jun 9, 2026 | — |
| 424B5 | Prospectus supplement | Apr 2, 2026 | — |
| 424B5 | Prospectus supplement | Mar 25, 2026 | — |
| 424B3 | Prospectus | Jul 26, 2024 | — |
| F-1/A | Form f-1/a | Jul 22, 2024 | — |
| F-1 | Registration statement (foreign issuer) | Jul 12, 2024 | — |
| F-3 | Shelf registration (foreign issuer) | Aug 30, 2023 | — |
| 424B5 | Prospectus supplement | Jun 30, 2023 | — |
| 424B5 | Prospectus supplement | Jun 28, 2023 | — |
| 424B5 | Prospectus supplement | Mar 18, 2022 | — |
| 424B5 | Prospectus supplement | Mar 16, 2022 | — |
| 424B5 | Prospectus supplement | Dec 6, 2021 | — |
| 424B5 | Prospectus supplement | Dec 2, 2021 | — |
| 424B3 | Prospectus | Dec 28, 2020 | — |
| F-3 | Shelf registration (foreign issuer) | Dec 18, 2020 | — |
| 424B5 | Prospectus supplement | Nov 24, 2020 | — |
| F-3 | Shelf registration (foreign issuer) | Aug 20, 2020 | — |
| POS AM | Filing | Jul 24, 2020 | — |
| 424B5 | Prospectus supplement | Sep 27, 2017 | — |
| F-3/A | Filing | Feb 27, 2017 | — |
| F-3/A | Filing | Feb 9, 2017 | — |
| F-3/A | Filing | Sep 12, 2016 | — |
| F-3/A | Filing | Sep 2, 2016 | — |
| F-3 | Shelf registration (foreign issuer) | Aug 22, 2016 | — |
| S-8 | Employee stock plan registration | Jul 23, 2015 | — |
| S-8 | Employee stock plan registration | Apr 13, 2015 | — |
| 424B1 | Form 424b1 | Mar 27, 2015 | — |
| F-1/A | Form f-1/a | Mar 16, 2015 | — |
| F-1/A | Form f-1/a | Mar 16, 2015 | — |
| F-1/A | Filing | Mar 4, 2015 | — |
| F-1/A | Filing | Feb 11, 2015 | — |
| F-1/A | Form f-1/a | Feb 6, 2015 | — |
| F-1/A | Filing | Jan 21, 2015 | — |
| F-1/A | Filing | Dec 15, 2014 | — |
| F-1/A | Form f-1/a | Nov 3, 2014 | — |
| F-1/A | Form f-1/a | Sep 30, 2014 | — |
| F-1 | Registration statement (foreign issuer) | Sep 16, 2014 | — |
Showing 37 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.