6-K

UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TORULE 13a-16 OR 15d-16UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of April 2022

Commission File Number: 001-36885

TANTECH HOLDINGS LTD

(Translation of registrant’s name into English)

c/oZhejiang Forest Bamboo Technology Co., Ltd.

No.10 Cen Shan Road, Shuige Industrial Zone

LishuiCity, 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 Form 20-F or Form 40-F.

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):   ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):   ¨

Explanatory Note:

On April 28, 2022, the Registrant received a letter from the Listings Qualifications Department of The Nasdaq Stock Market LLC (the “Nasdaq”) notifying the Registrant that the minimum closing bid price per share for its common shares was below $1.00 for a period of 30 consecutive business days and that the Registrant did not meet the minimum bid price requirement set forth in Nasdaq Listing Rule 5550(a)(2). This current report is filed pursuant to Nasdaq Listing Rule 5810(b). The Nasdaq notification letter does not result in the immediate delisting of the Registrant’s common shares, and the shares will continue to trade uninterrupted under the symbol “TANH.”

Pursuant to Nasdaq Listing Rule 5810(c)(3)(A), the Registrant has a compliance period of 180 calendar days, or until October 25, 2022 (the “Compliance Period”), to regain compliance with Nasdaq’s minimum bid price requirement. If at any time during the Compliance Period, the closing bid price per share of the Registrant's common shares is at least $1.00 for a minimum of 10 consecutive business days, Nasdaq will provide the Registrant a written confirmation of compliance and the matter will be closed.

In the event the Registrant does not regain compliance by October 25, 2022, the Registrant may be eligible for an additional 180 calendar day grace period. To qualify, the Registrant will be required to meet the continued listing requirement for market value of publicly held shares and all other initial listing standards for Nasdaq, with the exception of the bid price requirement, and will need to provide written notice of its intention to cure the deficiency during the second compliance period, including by effecting a reverse stock split, if necessary. If the Registrant chooses to implement a reverse stock split, it must complete the split no later than ten business days prior to the expiration of the second compliance period.

On April 28, 2022, the Registrant issued a press release entitled “Tantech Receives NASDAQ Notification Regarding Minimum Bid Requirements.” A copy of the please release is filed as Exhibit 99.1 to this Current Report on Form 6-K and is incorporated herein by reference.

Exhibits

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.

Exhibit 99.1

Tantech Receives NASDAQ Notification RegardingMinimum Bid Requirements

LISHUI, China, April 28, 2022 – Tantech Holdings Ltd (NASDAQ: TANH) ("Tantech" or the "Company"), a clean energy company, today announced that on April 28, 2022, it received a letter from The Nasdaq Stock Market LLC ("Nasdaq"), notifying the Company that it is currently not in compliance with the minimum bid price requirement set forth under Nasdaq Listing Rule 5550(a)(2). It resulted from the fact that the closing bid price of the Company's ordinary shares was below $1.00 per share for a period of 30 consecutive business days. This press release is issued pursuant to Nasdaq Listing Rule 5810(b), which requires prompt disclosure of receipt of a deficiency notification. The notification has no immediate effect on the listing of the Company's common shares, which will continue to trade uninterrupted on Nasdaq under the ticker “TANH”.

Pursuant to Nasdaq Listing Rule 5810(c)(3)(A), the Company has a compliance period of 180 calendar days, or until October 25, 2022 (the “Compliance Period”), to regain compliance with Nasdaq’s minimum bid price requirement. If at any time during the Compliance Period, the closing bid price per share of the Company's ordinary shares is at least $1.00 for a minimum of 10 consecutive business days, Nasdaq will provide the Company a written confirmation of compliance and the matter will be closed.

In the event the Company does not regain compliance with the minimum bid price requirement by October 25, 2022, the Company may be eligible for an additional 180 calendar day grace period.

About Tantech Holdings Ltd

For the past decade, Tantech has been a highly specialized high-tech enterprise producing, researching and developing bamboo charcoal-based products with an established domestic and international sales and distribution network. Since 2017, when the Company acquired 70% of Shangchi Automobile, a vehicle manufacturer based in Zhangjiagang City, Jiangsu Province, it has manufactured and sold vehicles. The Company established two new subsidiaries, Lishui Smart New Energy Automobile Co., Ltd. and Zhejiang Shangchi New Energy Automobile Co., Ltd., in November 2020, to produce and sell street sweepers and other electric vehicles. The Company is fully ISO 90000 and ISO 14000 certified and has received a number of national, provincial and local honors, awards and certifications for its products and scientific research efforts. The Company's subsidiary, First International Commercial Factoring (Shenzhen) Co., LTD, is engaged in commercial factoring for businesses in and related to its supply chain. For more information, please visit: http://ir.tantech.cn.

Forward-Looking Statements

This news release contains forward-looking statements as defined by the Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements concerning the sales, plans, objectives, goals, strategies, future events or performance, and underlying assumptions and other statements that are other than statements of historical facts. These statements are subject to uncertainties and risks including, but not limited to, product and service demand and acceptance, changes in technology, economic conditions, the impact of competition and pricing, government regulations, and other risks contained in reports filed by the Company with the Securities and Exchange Commission. All such forward-looking statements, whether written or oral, and whether made by or on behalf of the Company, are expressly qualified by this cautionary statement and any other cautionary statements which may accompany the forward-looking statements. In addition, the Company disclaims any obligation to update any forward-looking statements to reflect events or circumstances after the date hereof.

For more information, please contact:

Global IR Partners

David Pasquale

New York Phone: +1-914-337-8801

TANH@globalirpartners.com