UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of January ~~December 2025~~2026

Commission File Number: 001-36885

TANTECH HOLDINGS LTD

(Translation of registrant’s name into English)

No. 10 Cen Shan Road, Shuige Industrial Zone

Lishui City, Zhejiang Province ~~323000~~

~~+86-578-226-2305~~People’s Republic of China 323000

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

Explanatory Note:

On December 30, 2025, at the annual meeting of shareholders of Tantech Holdings Ltd (the “Company”), isshareholders ~~filing~~of ~~this~~the ~~Report~~Company onapproved, ~~Form~~among ~~6-K~~other tomatters, ~~report~~ the ~~final~~amendment ~~results~~and ~~for~~restatement of the ~~votes~~Memorandum ~~for~~and ~~its~~Articles ~~annual~~of ~~meeting~~Association of ~~shareholders~~the ~~for~~Company ~~the~~to ~~fiscal~~reflect ~~year~~the ~~ended~~reclassification ~~December~~and ~~31,~~redesignation ~~2024~~of (the ~~“Annual~~Company’s ~~Meeting”).~~common Atshares ~~the~~into ~~Annual~~Class ~~Meeting~~A ~~held~~common onshares ~~December~~and ~~30,~~Class ~~2025,~~B acommon ~~quorum~~shares. ~~was~~Pursuant ~~present~~to ~~and~~the ~~four~~Amended ~~proposals~~and ~~were~~Restated ~~submitted~~Memorandum to and ~~approved~~Articles byof Association, the ~~shareholders.~~Company ~~The~~is ~~proposals~~authorized ~~were~~to ~~described~~issue inan ~~detail~~unlimited innumber ~~the~~of ~~Company’s~~Class ~~proxy~~A ~~statement~~shares ~~filed~~of no par value each, with ~~the~~one ~~U.S.~~vote ~~Securities~~per share, and ~~Exchange~~an ~~Commission~~unlimited onnumber ~~December~~of 11Class B shares of no par value each, ~~2025~~with fifty votes per share. ~~The~~This ~~final~~Report ~~results~~on Form 6-K is being filed for the ~~votes~~sole ~~regarding~~purpose ~~each~~of ~~proposal~~confirming ~~are~~that ~~set~~the ~~forth~~Amended ~~below~~and Restated Memorandum and Articles of Association has been filed with the BVI Registrar of Corporate Affairs.

1.A ~~Shareholders~~copy ~~elected two Class III members~~ of the ~~Board~~Amended ofand ~~Directors~~Restated ~~for~~Memorandum ~~a term expiring in 2027,~~ and aArticles ~~Class I member~~ of ~~the~~Association ~~Board~~is ~~for~~attached aas ~~term~~Exhibit ~~expiring~~3.1 inhereto ~~2028, or until their successors are duly elected~~ and ~~qualified.~~incorporated ~~The~~herein ~~votes~~by ~~for each of the nominees were as follows:~~reference.

	For	Withheld	Abstained
Class III: Yefang Zhang	3,711,487	35,056	-
Class III: Weilin Zhang	3,711,487	35,056	-
Class I: Shudong Wang	3,703,342	43,201	-

Exhibits

~~2. Shareholders ratified the appointment of YCM CPA, Inc. as independent registered public accounting firm for the fiscal year ending December 31, 2025.~~ The ~~votes~~following ~~regarding~~document ~~this~~is ~~proposal~~filed ~~were as follows~~herewith:

For		Against		Abstained
3,712,557		29,169		4,818

EXHIBIT INDEX

3. Shareholders approved the Reclassification and Redesignation proposal. The votes regarding this proposal were as follows:

Exhibits No.		Description
3.1		Amended and Restated Memorandum and Articles of Association of Tantech Holdings Ltd

For		Against		Abstained
3,659,429		86,778		336

4. Shareholders approved the Amended and Restated Memorandum and Articles of Association. The votes regarding this proposal were as follows:

For		Against		Abstained
3,657,146		88,440		957

5. Shareholders approved such other business as may properly come before the meeting or any adjournment thereof. The votes regarding this proposal were as follows:

For		Against		Abstained
3,651,980		92,491		2,073

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	Tantech Holdings Ltd
Date: December 31, 2025	By:	/s/ Zheyuan Liu
Date: January 15, 2026	By:	/s/ Zheyuan Liu
		Zheyuan Liu
		Chief Executive Officer

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