Tantech Holdings Ltd (TANH) SEC Filings — 2026
3 SEC filings for Tantech Holdings Ltd (TANH) in 2026.
Filings
- Tantech Holdings Ltd. Files 6-K with Exchange Agreement — 6-K · Mar 31, 2026
- TANTECH Files 6-K, Reveals Major Sales Agreement — 6-K · Mar 25, 2026
- TANTECH Files 424B5 Prospectus Supplement for Existing Offering — 424B5 · Mar 25, 2026