As filed with the U.S. Securities and Exchange Commission on July 1, 2024 Registration No. 333-276630 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 3 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Alternus Clean Energy, Inc. (Exact Name of Registrant as Specified in Its Charter) (State or Other Jurisdiction of Incorporation or Organization) (Primary Standard Industrial Delaware 4931 87-1431377 (I.R.S. Employer Identification Number) Classification ...