Tantech Holdings (NASDAQ: TANH) furnishes 2025 annual meeting proxy on Form 6-K

Rhea-AI Filing Summary

Tantech Holdings Ltd submitted a Form 6-K as a foreign private issuer to provide materials for its 2025 annual shareholder meeting. The filing furnishes a notice of annual meeting of shareholders and proxy statement, along with a proxy card, so shareholders can review proposals and vote their shares.

U.S. SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 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 December 2025

Commission File Number: 001-36885

Tantech Holdings Ltd

(Registrant’s name)

No. 10 Cen Shan Road, Shuige Industrial Zone

Lishui City, Zhejiang Province 323000

+86-578-226-2305

(Address of principal executive offices)

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

Form 20-F ☒      Form 40-F ☐

Explanatory Note:

The Registrant is filing this Report on Form 6-K to provide its proxy statement for its 2025 annual shareholder meeting.

Exhibits No.		Description
99.1		Notice of Annual Meeting of Shareholders and Proxy Statement
99.2		Proxy Card

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SIGNATURES

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 11, 2025	By:	/s/ Zheyuan Liu
	Name:	Zheyuan Liu
	Title:	Chief Executive Officer

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FAQ

What does Tantech Holdings Ltd (TANH) report in this Form 6-K?

Tantech Holdings Ltd uses this Form 6-K to provide materials for its 2025 annual shareholder meeting. The submission includes a notice of meeting, a detailed proxy statement, and a proxy card enabling shareholders to cast votes on the matters presented.

What documents are attached to Tantech (TANH) December 2025 Form 6-K?

The Form 6-K includes two main exhibits: a Notice of Annual Meeting of Shareholders and Proxy Statement (Exhibit 99.1) and a Proxy Card (Exhibit 99.2). These documents outline meeting details and allow shareholders to vote on agenda items.

Why is Tantech Holdings Ltd (TANH) providing a proxy statement on Form 6-K?

Tantech Holdings Ltd is providing its 2025 proxy statement on Form 6-K to formally distribute annual meeting information to shareholders. This approach complies with U.S. securities rules for foreign private issuers and supports informed voting on corporate matters.

Who signed the Tantech Holdings Ltd (TANH) December 2025 Form 6-K?

The Form 6-K was signed on behalf of Tantech Holdings Ltd by Chief Executive Officer Zheyuan Liu on December 11, 2025. The signature confirms the company’s authorization and responsibility for the accuracy of the information furnished in the report.

Is Tantech Holdings Ltd (TANH) a foreign private issuer under SEC rules?

Yes. Tantech Holdings Ltd files this report as a foreign private issuer under the Securities Exchange Act of 1934. The company indicates it provides annual reports under cover of Form 20-F, consistent with reporting obligations for non-U.S. issuers listed in the United States.