TANTECH HOLDINGS LTD Amended Reports
Filings on SEC EDGAR, newest first; amendments sit with their base form. Values are as filed.
- 2025-09-18: Form 20-F/A; Period of report 2024-12-31; Description FORM 20-F/A; Document tanh_20fa.htm.
- 2023-01-17: Form 20-F/A; Period of report 2021-12-31; Description 20-F/A; Document tanh-20211231x20fa.htm.
- 2022-12-23: Form 20-F/A; Period of report 2021-12-31; Description 20-F/A; Document tanh-20211231x20fa.htm.
- 2020-07-06: Form 20-F/A; Period of report 2019-12-31; Description 20-F/A; Document tm2024156d1_20fa.htm.
| Filed | Form | Period of report | Description | Document |
|---|---|---|---|---|
| 2025-09-18 | 20-F/A | 2024-12-31 | FORM 20-F/A | tanh_20fa.htm |
| 2023-01-17 | 20-F/A | 2021-12-31 | 20-F/A | tanh-20211231x20fa.htm |
| 2022-12-23 | 20-F/A | 2021-12-31 | 20-F/A | tanh-20211231x20fa.htm |
| 2020-07-06 | 20-F/A | 2019-12-31 | 20-F/A | tm2024156d1_20fa.htm |
| 2016-12-21 | 20-F/A | 2015-12-31 | 20-F/A | v455472_20fa.htm |
| 2016-11-28 | 20-F/A | 2015-12-31 | 20-F/A | v453958_20fa.htm |
| 2016-10-28 | 20-F/A | 2015-12-31 | FORM 20-F/A | v451599_20fa.htm |