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 August 2023

Commission File Number: 001-39978

CN ENERGY GROUP. INC.

Building 2-B, Room 206, No. 268 Shiniu Road

Liandu District, Lishui City, Zhejiang Province

The People’s Republic of China

(Address of principal executive office)

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

In connection with the 2023 Annual General Meeting of Shareholders (the “Meeting”) of CN Energy Group. Inc., a business company incorporated under the laws of the British Virgin Islands (the “Company”), the Company hereby furnishes the notice and proxy statement of the Meeting and the form of proxy card as Exhibits 99.1 and 99.2, respectively.

Exhibits

Exhibit No.	Description
99.1	Notice and Proxy Statement of the Meeting, dated August 11, 2023, to be mailed to shareholders of the Company in connection with the Meeting
99.2	Form of Proxy Card to be mailed to shareholders of the Company for use in connection with the Meeting

2

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.

	CN ENERGY GROUP. INC.
Date: August 11, 2023	By:	/s/ Xinyang Wang
		Xinyang Wang
		Chief Executive Officer

3