TANTECH HOLDINGS LTD Late Filing Notices
Filings on SEC EDGAR, newest first; amendments sit with their base form. Values are as filed.
- 2026-05-01: Form NT 20-F; Period of report 2025-12-31; Description NT 20-F; Document tanh_nt20f.htm.
- 2025-05-01: Form NT 20-F; Period of report 2024-12-31; Description NT 20-F; Document tanh_nt20f.htm.
- 2024-05-01: Form NT 20-F; Period of report 2023-12-31; Description NT 20-F; Document tanh_nt20f.htm.
- 2022-05-02: Form NT 20-F; Period of report 2021-12-31; Description FORM NT 20-F; Document tm2214249d1_nt20f.htm.
| Filed | Form | Period of report | Description | Document |
|---|---|---|---|---|
| 2026-05-01 | NT 20-F | 2025-12-31 | NT 20-F | tanh_nt20f.htm |
| 2025-05-01 | NT 20-F | 2024-12-31 | NT 20-F | tanh_nt20f.htm |
| 2024-05-01 | NT 20-F | 2023-12-31 | NT 20-F | tanh_nt20f.htm |
| 2022-05-02 | NT 20-F | 2021-12-31 | FORM NT 20-F | tm2214249d1_nt20f.htm |
| 2020-06-12 | NT 20-F | 2019-12-31 | NT 20-F | tm206462d4_nt20f.htm |
| 2019-04-30 | NT 20-F | 2018-12-31 | NT 20-F | tv520186_nt20f.htm |
| 2018-04-30 | NT 20-F | 2017-12-31 | NT 20-F | tv492617_nt20f.htm |