TANTECH HOLDINGS LTD

Symbol
TANH on Nasdaq
Business address
No. 10 Cen Shan Rd, Shuige Indtrl Zone, Lishui City, Zhejiang, China, 323000
State of incorporation
Virgin Islands, British
Fiscal year end
31 December
TANTECH HOLDINGS LTD has filed 264 SEC EDGAR filings since 30 Sep 2013

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
6-K Open Document | Data Open Filing FORM 6-K 19 Dec 2025 30 Jun 2025 001-36885
6-K Open Document Open Filing FROM 6-K 11 Dec 2025 11 Dec 2025 001-36885
6-K Open Document Open Filing FORM 6-K 24 Oct 2025 23 Oct 2025 001-36885
6-K Open Document Open Filing FORM 6-K 17 Oct 2025 17 Oct 2025 001-36885
6-K Open Document Open Filing FORM 6-K 24 Sep 2025 24 Sep 2025 001-36885
20-F/A Open Document | Data Open Filing FORM 20-F/A 18 Sep 2025 31 Dec 2024 001-36885
6-K Open Document Open Filing FORM 6-K 03 Jun 2025 02 Jun 2025 001-36885
20-F Open Document | Data Open Filing FORM 20-F 15 May 2025 31 Dec 2024 001-36885
NT 20-F Open Document Open Filing NT 20-F 01 May 2025 31 Dec 2024 001-36885
SCHEDULE 13G Open Document Open Filing 21 Apr 2025 005-89402
6-K Open Document Open Filing FORM 6-K 03 Mar 2025 03 Mar 2025 001-36885
6-K Open Document Open Filing FORM 6-K 10 Feb 2025 10 Feb 2025 001-36885
6-K Open Document Open Filing FORM 6-K 08 Jan 2025 07 Jan 2025 001-36885
6-K Open Document Open Filing FORM 6-K 06 Jan 2025 06 Jan 2025 001-36885
6-K Open Document | Data Open Filing FORM 6-K 02 Jan 2025 30 Jun 2024 001-36885
6-K Open Document Open Filing FORM 8-K 27 Dec 2024 27 Dec 2024 001-36885
6-K Open Document Open Filing FORM 6-K 20 Dec 2024 20 Dec 2024 001-36885
6-K Open Document Open Filing FORM 6-K 16 Dec 2024 11 Dec 2024 001-36885
SC 13G/A Open Document Open Filing AMENDMENT NO. 1 TO SCHEDULE 13G 13 Nov 2024 005-89402
SC 13G/A Open Document Open Filing 06 Nov 2024 005-89402
6-K Open Document Open Filing FORM 6-K 10 Sep 2024 10 Sep 2024 001-36885
6-K Open Document Open Filing FORM 6-K 28 Aug 2024 28 Aug 2024 001-36885
6-K/A Open Document Open Filing FORM 6-K/A 29 Jul 2024 29 Jul 2024 001-36885
424B3 Open Document Open Filing 424B3 26 Jul 2024 333-280791
EFFECT Open Document Open Filing 25 Jul 2024 333-280791
CORRESP Open Document Open Filing 23 Jul 2024
F-1/A Open Document Open Filing FORM F-1/A 22 Jul 2024 333-280791
UPLOAD Open Document Open Filing 22 Jul 2024 333-280791
F-1 Open Document Open Filing FORM F-1 12 Jul 2024 333-280791
6-K Open Document Open Filing FORM 6-K 17 Jun 2024 17 Jun 2024 001-36885
20-F Open Document | Data Open Filing FORM 20-F 11 Jun 2024 31 Dec 2023 001-36885
6-K Open Document Open Filing FORM 6-K 21 May 2024 21 May 2024 001-36885
SC 13G Open Document Open Filing SCHEDULE 13G 08 May 2024 005-89402
6-K Open Document Open Filing FORM 6-K 08 May 2024 08 May 2024 001-36885
SC 13G Open Document Open Filing 03 May 2024 005-89402
NT 20-F Open Document Open Filing NT 20-F 01 May 2024 31 Dec 2023 001-36885
6-K Open Document Open Filing FORM 6-K 26 Apr 2024 24 Apr 2024 001-36885
6-K Open Document Open Filing FORM 6-K 19 Mar 2024 19 Mar 2024 001-36885
6-K Open Document Open Filing FORM 6-K 29 Feb 2024 28 Feb 2024 001-36885
6-K Open Document Open Filing FORM 6-K 16 Jan 2024 16 Jan 2024 001-36885
6-K Open Document Open Filing FORM 6-K 02 Jan 2024 02 Jan 2024 001-36885
6-K Open Document | Data Open Filing FORM 6-K 05 Dec 2023 30 Jun 2023 001-36885
6-K Open Document Open Filing FORM 6-K 20 Nov 2023 17 Nov 2023 001-36885
6-K Open Document Open Filing FORM 6-K 24 Oct 2023 24 Oct 2023 001-36885
SC 13G Open Document Open Filing SC 13G 16 Oct 2023 005-89402
SC 13G Open Document Open Filing SC 13G 13 Oct 2023 005-89402
SC 13G Open Document Open Filing SC 13G 12 Oct 2023 005-89402
SC 13G Open Document Open Filing SC 13G 12 Oct 2023 005-89402
SC 13G Open Document Open Filing SC 13G 12 Oct 2023 005-89402
SC 13G Open Document Open Filing SC 13G 12 Oct 2023 005-89402
SC 13G Open Document Open Filing 10 Oct 2023 005-89402
EFFECT Open Document Open Filing 11 Sep 2023 333-274274
CORRESP Open Document Open Filing 07 Sep 2023
UPLOAD Open Document Open Filing 06 Sep 2023
F-3 Open Document Open Filing FORM F-3 30 Aug 2023 333-274274
6-K Open Document Open Filing FORM 6-K 14 Aug 2023 14 Aug 2023 001-36885
424B5 Open Document Open Filing 424B5 30 Jun 2023 333-248197
6-K Open Document Open Filing FORM 6-K 30 Jun 2023 30 Jun 2023 001-36885
424B5 Open Document Open Filing 424B5 28 Jun 2023 333-248197
6-K/A Open Document Open Filing FORM 6-K/A 28 Jun 2023 23 Jun 2023 001-36885
6-K Open Document Open Filing FORM 6-K 23 Jun 2023 23 Jun 2023 001-36885
20-F Open Document | Data Open Filing FORM 20-F 01 May 2023 31 Dec 2022 001-36885
6-K Open Document Open Filing FORM 6-K 24 Mar 2023 24 Mar 2023 001-36885
UPLOAD Open Document Open Filing 24 Jan 2023
CORRESP Open Document Open Filing 17 Jan 2023
20-F/A Open Document | Data Open Filing 20-F/A 17 Jan 2023 31 Dec 2021 001-36885
SC 13G/A Open Document Open Filing SABBY 13GA TANH 1.10.23 10 Jan 2023 005-89402
UPLOAD Open Document Open Filing 04 Jan 2023
6-K Open Document | Data Open Filing 6-K 28 Dec 2022 30 Jun 2022 001-36885
20-F/A Open Document | Data Open Filing 20-F/A 23 Dec 2022 31 Dec 2021 001-36885
6-K Open Document Open Filing 6-K 21 Dec 2022 20 Dec 2022 001-36885
6-K Open Document Open Filing FORM 6-K 13 Dec 2022 13 Dec 2022 001-36885
6-K Open Document Open Filing FORM 6-K 01 Dec 2022 01 Dec 2022 001-36885
CORRESP Open Document Open Filing 28 Nov 2022
6-K Open Document Open Filing FORM 6-K 22 Nov 2022 22 Nov 2022 001-36885
UPLOAD Open Document Open Filing 10 Nov 2022
6-K Open Document Open Filing FORM 6-K 08 Nov 2022 08 Nov 2022 001-36885
6-K Open Document Open Filing FORM 6-K 31 Oct 2022 31 Oct 2022 001-36885
6-K Open Document Open Filing FORM 6-K 19 Oct 2022 19 Oct 2022 001-36885
CORRESP Open Document Open Filing 12 Oct 2022
UPLOAD Open Document Open Filing 12 Sep 2022
6-K Open Document Open Filing FORM 6-K 03 Aug 2022 03 Aug 2022 001-36885
6-K Open Document Open Filing FORM 6-K 21 Jul 2022 21 Jul 2022 001-36885
20-F Open Document | Data Open Filing 20-F 18 Jul 2022 31 Dec 2021 001-36885
6-K Open Document Open Filing FORM 6-K 21 Jun 2022 21 Jun 2022 001-36885
6-K Open Document Open Filing FORM 6-K 01 Jun 2022 01 Jun 2022 001-36885
6-K Open Document Open Filing FORM 6-K 27 May 2022 27 May 2022 001-36885
6-K Open Document Open Filing FORM 6-K 19 May 2022 19 May 2022 001-36885
NT 20-F Open Document Open Filing FORM NT 20-F 02 May 2022 31 Dec 2021 001-36885
6-K Open Document Open Filing FORM 6-K 28 Apr 2022 28 Apr 2022 001-36885
6-K Open Document Open Filing FORM 6-K 22 Mar 2022 22 Mar 2022 001-36885
6-K Open Document Open Filing FORM 6-K 21 Mar 2022 21 Mar 2022 001-36885
424B5 Open Document Open Filing 424B5 18 Mar 2022 333-248197
424B5 Open Document Open Filing 424B5 16 Mar 2022 333-248197
6-K Open Document Open Filing FORM 6-K 15 Mar 2022 15 Mar 2022 001-36885
6-K Open Document Open Filing 6-K 02 Mar 2022 02 Mar 2022 001-36885
6-K Open Document Open Filing FORM 6-K 25 Feb 2022 25 Feb 2022 001-36885
SC 13G/A Open Document Open Filing SABBY 13G-A TANH 1.04.22 05 Jan 2022 005-89402
SC 13G Open Document Open Filing SABBY 13G TANH 12.09.21 09 Dec 2021 005-89402
6-K Open Document Open Filing FORM 6-K 07 Dec 2021 06 Dec 2021 001-36885
424B5 Open Document Open Filing 424B5 06 Dec 2021 333-248197
424B5 Open Document Open Filing 424B5 02 Dec 2021 333-248197
6-K Open Document Open Filing FORM 6-K 18 Nov 2021 18 Nov 2021 001-36885
6-K Open Document Open Filing FORM 6-K 04 Nov 2021 04 Nov 2021 001-36885
6-K Open Document | Data Open Filing FORM 6-K 22 Oct 2021 30 Jun 2021 001-36885
6-K Open Document Open Filing FORM 6-K 04 Oct 2021 04 Oct 2021 001-36885
6-K Open Document Open Filing FORM 6-K 01 Sep 2021 01 Sep 2021 001-36885
6-K Open Document Open Filing FORM 6-K 09 Aug 2021 09 Aug 2021 001-36885
6-K Open Document Open Filing FORM 6-K 06 Aug 2021 06 Aug 2021 001-36885
6-K Open Document Open Filing FORM 6-K 06 Aug 2021 06 Aug 2021 001-36885
6-K Open Document Open Filing FORM 6-K 19 Jul 2021 19 Jul 2021 001-36885
6-K Open Document Open Filing FORM 6-K 08 Jun 2021 08 Jun 2021 001-36885
6-K/A Open Document Open Filing FORM 6-K/A 07 Jun 2021 07 Jun 2021 001-36885
6-K Open Document Open Filing FORM 6-K 27 May 2021 27 May 2021 001-36885
20-F Open Document | Data Open Filing 20-F 27 Apr 2021 31 Dec 2020 001-36885
424B3 Open Document Open Filing 424B3 28 Dec 2020 333-251509
EFFECT Open Document Open Filing 23 Dec 2020 333-251509
CORRESP Open Document Open Filing 22 Dec 2020
CORRESP Open Document Open Filing 22 Dec 2020
UPLOAD Open Document Open Filing 21 Dec 2020
F-3 Open Document Open Filing F-3 18 Dec 2020 333-251509
6-K/A Open Document Open Filing FORM 6-K/A 08 Dec 2020 08 Dec 2020 001-36885
D Open Document Open Filing 07 Dec 2020 021-382494
SC 13G Open Document Open Filing SCHEDULE 13G 30 Nov 2020 005-89402
6-K Open Document Open Filing FORM 6-K 24 Nov 2020 24 Nov 2020 001-36885
424B5 Open Document Open Filing 424B5 24 Nov 2020 333-248197
6-K Open Document Open Filing FORM 6-K 20 Nov 2020 20 Nov 2020 001-36885
6-K Open Document | Data Open Filing FORM 6-K 30 Sep 2020 30 Jun 2020 001-36885
6-K Open Document Open Filing 6-K 14 Sep 2020 14 Sep 2020 001-36885
EFFECT Open Document Open Filing 31 Aug 2020 333-248197
CORRESP Open Document Open Filing 27 Aug 2020
UPLOAD Open Document Open Filing 26 Aug 2020
F-3 Open Document Open Filing F-3 20 Aug 2020 333-248197
6-K Open Document Open Filing FORM 6-K 12 Aug 2020 12 Aug 2020 001-36885
EFFECT Open Document Open Filing 04 Aug 2020 333-213240
POS AM Open Document Open Filing POS AM 24 Jul 2020 333-213240
20-F/A Open Document Open Filing 20-F/A 06 Jul 2020 31 Dec 2019 001-36885
20-F Open Document | Data Open Filing FORM 20-F 30 Jun 2020 31 Dec 2019 001-36885
NT 20-F Open Document Open Filing NT 20-F 12 Jun 2020 31 Dec 2019 001-36885
6-K Open Document Open Filing FORM 6-K 20 May 2020 20 May 2020 001-36885
6-K Open Document Open Filing FORM 6-K 22 Apr 2020 22 Apr 2020 001-36885
SC 13G/A Open Document Open Filing SC 13G/A 06 Feb 2020 005-89402
6-K Open Document Open Filing FORM 6-K 18 Dec 2019 18 Dec 2019 001-36885
6-K Open Document Open Filing FORM 6-K 17 Dec 2019 17 Dec 2019 001-36885
6-K Open Document Open Filing FORM 6-K 06 Dec 2019 06 Dec 2019 001-36885
6-K Open Document Open Filing 6-K 29 Jul 2019 29 Jul 2019 001-36885
6-K Open Document Open Filing FORM 6-K 27 Jun 2019 27 Jun 2019 001-36885
6-K Open Document Open Filing FORM 6-K 27 Jun 2019 27 Jun 2019 001-36885
6-K Open Document Open Filing 6-K 28 May 2019 28 May 2019 001-36885
20-F Open Document | Data Open Filing 20-F 15 May 2019 31 Dec 2018 001-36885
NT 20-F Open Document Open Filing NT 20-F 30 Apr 2019 31 Dec 2018 001-36885
6-K Open Document Open Filing FORM 6-K 23 Apr 2019 22 Apr 2019 001-36885
6-K Open Document Open Filing FORM 6-K 30 Jan 2019 30 Jan 2019 001-36885
6-K Open Document Open Filing FORM 6-K 26 Dec 2018 26 Dec 2018 001-36885
6-K Open Document Open Filing 6-K 14 Dec 2018 14 Dec 2018 001-36885
6-K Open Document Open Filing 6-K 10 Dec 2018 10 Dec 2018 001-36885
6-K Open Document Open Filing FORM 6-K 07 Nov 2018 07 Nov 2018 001-36885
6-K Open Document Open Filing FORM 6-K 15 Oct 2018 15 Oct 2018 001-36885
6-K Open Document Open Filing 6-K 17 Sep 2018 17 Sep 2018 001-36885
6-K Open Document Open Filing FORM 6-K 31 Aug 2018 31 Aug 2018 001-36885
6-K Open Document Open Filing 6-K 23 Aug 2018 23 Aug 2018 001-36885
20-F Open Document | Data Open Filing 20-F 11 May 2018 31 Dec 2017 001-36885
NT 20-F Open Document Open Filing NT 20-F 30 Apr 2018 31 Dec 2017 001-36885
6-K Open Document Open Filing 6-K 19 Apr 2018 19 Apr 2018 001-36885
6-K Open Document Open Filing FORM 6-K 06 Mar 2018 06 Mar 2018 001-36885
6-K Open Document Open Filing FORM 6-K 10 Jan 2018 10 Jan 2018 001-36885
6-K Open Document Open Filing FORM 6-K 29 Dec 2017 29 Dec 2017 001-36885
6-K Open Document Open Filing FORM 6-K 21 Dec 2017 21 Dec 2017 001-36885
6-K Open Document Open Filing FORM 6-K 19 Dec 2017 19 Dec 2017 001-36885
6-K Open Document Open Filing 6-K 11 Dec 2017 11 Dec 2017 001-36885
6-K Open Document Open Filing FORM 6-K 08 Nov 2017 08 Nov 2017 001-36885
6-K Open Document Open Filing FORM 6-K 12 Oct 2017 12 Oct 2017 001-36885
6-K Open Document Open Filing 6-K 29 Sep 2017 29 Sep 2017 001-36885
424B5 Open Document Open Filing 424B5 27 Sep 2017 333-213240
6-K Open Document Open Filing FORM 6-K 27 Sep 2017 27 Sep 2017 001-36885
6-K Open Document Open Filing 6-K 27 Sep 2017 27 Sep 2017 001-36885
6-K/A Open Document Open Filing FORM 6-K/A 25 Sep 2017 25 Sep 2017 001-36885
6-K Open Document Open Filing 6-K 21 Sep 2017 21 Sep 2017 001-36885
144 Open Document Open Filing FORM 144 28 Aug 2017 001-36885
6-K/A Open Document | Data Open Filing 6-K/A 19 Jul 2017 19 Jul 2017 001-36885
6-K Open Document | Data Open Filing 6-K 17 Jul 2017 17 Jul 2017 001-36885
20-F Open Document | Data Open Filing 20-F 01 May 2017 31 Dec 2016 001-36885
EFFECT Open Document Open Filing 09 Mar 2017 333-213240
CORRESP Open Document Open Filing 03 Mar 2017
RW WD Open Document Open Filing RW WD 03 Mar 2017 333-213240
CORRESP Open Document Open Filing 02 Mar 2017
RW Open Document Open Filing RW 02 Mar 2017 333-213240
CORRESP Open Document Open Filing 01 Mar 2017
F-3/A Open Document Open Filing F-3/A 27 Feb 2017 333-213240
6-K Open Document Open Filing FORM 6-K 24 Feb 2017 23 Feb 2017 001-36885
6-K Open Document Open Filing FORM 6-K 10 Feb 2017 10 Feb 2017 001-36885
F-3/A Open Document Open Filing F-3/A 09 Feb 2017 333-213240
6-K Open Document Open Filing 6-K 03 Jan 2017 03 Jan 2017 001-36885
6-K Open Document Open Filing FORM 6-K 28 Dec 2016 28 Dec 2016 001-36885
UPLOAD Open Document Open Filing 23 Dec 2016
6-K Open Document Open Filing FORM 6-K 22 Dec 2016 22 Dec 2016 001-36885
CORRESP Open Document Open Filing 21 Dec 2016
20-F/A Open Document Open Filing 20-F/A 21 Dec 2016 31 Dec 2015 001-36885
6-K Open Document Open Filing FORM 6-K 19 Dec 2016 19 Dec 2016 001-36885
6-K Open Document Open Filing 6-K 13 Dec 2016 13 Dec 2016 001-36885
UPLOAD Open Document Open Filing 08 Dec 2016
CORRESP Open Document Open Filing 28 Nov 2016
20-F/A Open Document Open Filing 20-F/A 28 Nov 2016 31 Dec 2015 001-36885
UPLOAD Open Document Open Filing 03 Nov 2016
CORRESP Open Document Open Filing 28 Oct 2016
20-F/A Open Document | Data Open Filing FORM 20-F/A 28 Oct 2016 31 Dec 2015 001-36885
UPLOAD Open Document Open Filing 30 Sep 2016
F-3/A Open Document Open Filing F-3/A 12 Sep 2016 333-213240
F-3/A Open Document Open Filing F-3/A 02 Sep 2016 333-213240
F-3 Open Document Open Filing F-3 22 Aug 2016 333-213240
6-K/A Open Document Open Filing FORM 6-K/A 15 Jul 2016 15 Jul 2016 001-36885
6-K Open Document Open Filing FORM 6-K 12 Jul 2016 12 Jul 2016 001-36885
6-K Open Document Open Filing FORM 6-K 24 Jun 2016 24 Jun 2016 001-36885
SC 13D Open Document Open Filing SC 13D 11 May 2016 005-89402
6-K Open Document Open Filing FORM 6-K 06 May 2016 06 May 2016 001-36885
6-K Open Document | Data Open Filing FORM 6-K 02 May 2016 02 May 2016 001-36885
20-F Open Document | Data Open Filing 20-F 29 Apr 2016 31 Dec 2015 001-36885
6-K Open Document Open Filing FORM 6-K 04 Mar 2016 04 Mar 2016 001-36885
SC 13G Open Document Open Filing SC 13G 17 Feb 2016 005-89402
6-K Open Document Open Filing FORM 6-K 03 Feb 2016 03 Feb 2016 001-36885
6-K Open Document Open Filing FORM 6-K 29 Jan 2016 29 Jan 2016 001-36885
6-K Open Document Open Filing FORM 6-K 09 Dec 2015 09 Dec 2015 001-36885
6-K Open Document Open Filing FORM 6-K 21 Aug 2015 21 Aug 2015 001-36885
6-K Open Document Open Filing FORM 6-K 10 Aug 2015 10 Aug 2015 001-36885
S-8 Open Document Open Filing FORM S-8 23 Jul 2015 333-205821
6-K Open Document Open Filing FORM 6-K 30 Jun 2015 30 Jun 2015 001-36885
6-K Open Document Open Filing FORM 6-K 08 Jun 2015 08 Jun 2015 001-36885
20-F Open Document | Data Open Filing 20-F 30 Apr 2015 31 Dec 2014 001-36885
S-8 Open Document Open Filing S-8 13 Apr 2015 333-203387
424B1 Open Document Open Filing FORM 424B1 27 Mar 2015 333-198788
EFFECT Open Document Open Filing 18 Mar 2015 333-198788
CERTNAS Open Document Open Filing AUTO-GENERATED PAPER DOCUMENT 18 Mar 2015 001-36885
CORRESP Open Document Open Filing 17 Mar 2015
CORRESP Open Document Open Filing 17 Mar 2015
8-A12B Open Document Open Filing 8-A12B 17 Mar 2015 001-36885
F-1/A Open Document Open Filing FORM F-1/A 16 Mar 2015 333-198788
F-1/A Open Document Open Filing FORM F-1/A 16 Mar 2015 333-198788
UPLOAD Open Document Open Filing 13 Mar 2015
F-1/A Open Document Open Filing F-1/A 04 Mar 2015 333-198788
CORRESP Open Document Open Filing 11 Feb 2015
F-1/A Open Document Open Filing F-1/A 11 Feb 2015 333-198788
F-1/A Open Document Open Filing FORM F-1/A 06 Feb 2015 333-198788
CORRESP Open Document Open Filing 05 Feb 2015
UPLOAD Open Document Open Filing 04 Feb 2015
F-1/A Open Document Open Filing F-1/A 21 Jan 2015 333-198788
F-1/A Open Document Open Filing F-1/A 15 Dec 2014 333-198788
UPLOAD Open Document Open Filing 17 Nov 2014
F-1/A Open Document Open Filing FORM F-1/A 03 Nov 2014 333-198788
F-1/A Open Document Open Filing FORM F-1/A 30 Sep 2014 333-198788
UPLOAD Open Document Open Filing 29 Sep 2014
CORRESP Open Document Open Filing 17 Sep 2014
CORRESP Open Document Open Filing 16 Sep 2014
F-1 Open Document Open Filing F-1 16 Sep 2014 333-198788
UPLOAD Open Document Open Filing 08 Sep 2014
DRSLTR Open Document Open Filing 25 Aug 2014
DRS/A Open Document Open Filing 25 Aug 2014 377-00326
UPLOAD Open Document Open Filing 28 Jul 2014
DRSLTR Open Document Open Filing 30 Jun 2014
DRS/A Open Document Open Filing 30 Jun 2014 377-00326
UPLOAD Open Document Open Filing 31 Mar 2014
DRSLTR Open Document Open Filing 04 Mar 2014
DRS/A Open Document Open Filing 04 Mar 2014 377-00326