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 |
|---|---|---|---|
| EFFECT | Filing | Jun 17, 2026 | — |
| CORRESP | Letter to the SEC | Jun 15, 2026 | — |
| UPLOAD | Letter from the SEC | Jun 3, 2026 | — |
| DRS | Filing | Jun 2, 2026 | — |
| NT 20-F | Filing | May 1, 2026 | Dec 31, 2025 |
| UPLOAD | Letter from the SEC | Dec 15, 2025 | — |
| CORRESP | Letter to the SEC | Sep 18, 2025 | — |
| UPLOAD | Letter from the SEC | Sep 2, 2025 | — |
| NT 20-F | Filing | May 1, 2025 | Dec 31, 2024 |
| EFFECT | Filing | Jul 25, 2024 | — |
| CORRESP | Letter to the SEC | Jul 23, 2024 | — |
| UPLOAD | Letter from the SEC | Jul 22, 2024 | — |
| NT 20-F | Filing | May 1, 2024 | Dec 31, 2023 |
| EFFECT | Filing | Sep 11, 2023 | — |
| CORRESP | Letter to the SEC | Sep 7, 2023 | — |
| UPLOAD | Letter from the SEC | Sep 6, 2023 | — |
| UPLOAD | Letter from the SEC | Jan 24, 2023 | — |
| CORRESP | Letter to the SEC | Jan 17, 2023 | — |
| UPLOAD | Letter from the SEC | Jan 4, 2023 | — |
| CORRESP | Letter to the SEC | Nov 28, 2022 | — |
| UPLOAD | Letter from the SEC | Nov 10, 2022 | — |
| CORRESP | Letter to the SEC | Oct 12, 2022 | — |
| UPLOAD | Letter from the SEC | Sep 12, 2022 | — |
| NT 20-F | Form nt 20-f | May 2, 2022 | Dec 31, 2021 |
| EFFECT | Filing | Dec 23, 2020 | — |
| CORRESP | Letter to the SEC | Dec 22, 2020 | — |
| CORRESP | Letter to the SEC | Dec 22, 2020 | — |
| UPLOAD | Letter from the SEC | Dec 21, 2020 | — |
| D | Filing | Dec 7, 2020 | — |
| EFFECT | Filing | Aug 31, 2020 | — |
| CORRESP | Letter to the SEC | Aug 27, 2020 | — |
| UPLOAD | Letter from the SEC | Aug 26, 2020 | — |
| EFFECT | Filing | Aug 4, 2020 | — |
| NT 20-F | Filing | Jun 12, 2020 | Dec 31, 2019 |
| NT 20-F | Filing | Apr 30, 2019 | Dec 31, 2018 |
| NT 20-F | Filing | Apr 30, 2018 | Dec 31, 2017 |
| EFFECT | Filing | Mar 9, 2017 | — |
| CORRESP | Letter to the SEC | Mar 3, 2017 | — |
| RW WD | Filing | Mar 3, 2017 | — |
| CORRESP | Letter to the SEC | Mar 2, 2017 | — |
| RW | Filing | Mar 2, 2017 | — |
| CORRESP | Letter to the SEC | Mar 1, 2017 | — |
| UPLOAD | Letter from the SEC | Dec 23, 2016 | — |
| CORRESP | Letter to the SEC | Dec 21, 2016 | — |
| UPLOAD | Letter from the SEC | Dec 8, 2016 | — |
| CORRESP | Letter to the SEC | Nov 28, 2016 | — |
| UPLOAD | Letter from the SEC | Nov 3, 2016 | — |
| CORRESP | Letter to the SEC | Oct 28, 2016 | — |
| UPLOAD | Letter from the SEC | Sep 30, 2016 | — |
| EFFECT | Filing | Mar 18, 2015 | — |
| CERTNAS | Auto-generated paper document | Mar 18, 2015 | — |
| CORRESP | Letter to the SEC | Mar 17, 2015 | — |
| CORRESP | Letter to the SEC | Mar 17, 2015 | — |
| 8-A12B | Filing | Mar 17, 2015 | — |
| UPLOAD | Letter from the SEC | Mar 13, 2015 | — |
| CORRESP | Letter to the SEC | Feb 11, 2015 | — |
| CORRESP | Letter to the SEC | Feb 5, 2015 | — |
| UPLOAD | Letter from the SEC | Feb 4, 2015 | — |
| UPLOAD | Letter from the SEC | Nov 17, 2014 | — |
| UPLOAD | Letter from the SEC | Sep 29, 2014 | — |
| CORRESP | Letter to the SEC | Sep 17, 2014 | — |
| CORRESP | Letter to the SEC | Sep 16, 2014 | — |
| UPLOAD | Letter from the SEC | Sep 8, 2014 | — |
| DRSLTR | Filing | Aug 25, 2014 | — |
| DRS/A | Filing | Aug 25, 2014 | — |
| UPLOAD | Letter from the SEC | Jul 28, 2014 | — |
| DRSLTR | Filing | Jun 30, 2014 | — |
| DRS/A | Filing | Jun 30, 2014 | — |
| UPLOAD | Letter from the SEC | Mar 31, 2014 | — |
| DRSLTR | Filing | Mar 4, 2014 | — |
| DRS/A | Filing | Mar 4, 2014 | — |
| UPLOAD | Letter from the SEC | Oct 25, 2013 | — |
| DRS | Filing | Sep 30, 2013 | — |
Showing 73 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.