F-1/A 1 cney_f1a.htm FORM F-1/A As filed with the Securities and Exchange Commission on October 29, 2025 Registration No. 333-288429 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 PRE-EFFECTIVE AMENDMENT NO. 1 TO FORM F-3 ON FORM F-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 CN ENERGY GROUP. INC. (Exact name of registrant as specified in its charter) British Virgin Islands Not Applicable (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Id ...