TANTECH HOLDINGS LTD Form 20-F: Annual report of foreign private issuer
Filings on SEC EDGAR, newest first; amendments sit with their base form. Values are as filed.
- 2026-05-14: Form 20-F; Period of report 2025-12-31; Description FORM 20-F; Document tanh_20f.htm.
- 2025-05-15: Form 20-F; Period of report 2024-12-31; Description FORM 20-F; Document tanh_20f.htm.
- 2024-06-11: Form 20-F; Period of report 2023-12-31; Description FORM 20-F; Document tanh_20f.htm.
- 2023-05-01: Form 20-F; Period of report 2022-12-31; Description FORM 20-F; Document tanh_20f.htm.
| Filed | Form | Period of report | Description | Document |
|---|---|---|---|---|
| 2026-05-14 | 20-F | 2025-12-31 | FORM 20-F | tanh_20f.htm |
| 2025-05-15 | 20-F | 2024-12-31 | FORM 20-F | tanh_20f.htm |
| 2024-06-11 | 20-F | 2023-12-31 | FORM 20-F | tanh_20f.htm |
| 2023-05-01 | 20-F | 2022-12-31 | FORM 20-F | tanh_20f.htm |
| 2022-07-18 | 20-F | 2021-12-31 | 20-F | tanh-20211231x20f.htm |
| 2021-04-27 | 20-F | 2020-12-31 | 20-F | tm211768d1_20f.htm |
| 2020-06-30 | 20-F | 2019-12-31 | FORM 20-F | tm206462-1_20f.htm |
| 2019-05-15 | 20-F | 2018-12-31 | 20-F | tv521135_20f.htm |
| 2018-05-11 | 20-F | 2017-12-31 | 20-F | tv488623_20f.htm |
| 2017-05-01 | 20-F | 2016-12-31 | 20-F | v464135_20f.htm |
| 2016-04-29 | 20-F | 2015-12-31 | 20-F | v436579_20f.htm |
| 2015-04-30 | 20-F | 2014-12-31 | 20-F | v406978_20f.htm |