As filed with the Securities and Exchange Commission on August 8, 2025. Registration No. 333-281530 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ____________________________ AMENDMENT NO. 4 to FORM F-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 (Name, address, including zip code, and telephone number, including area code, of agent for service) ____________________________ ____________________________ Texxon Holding Limited (Exact name of Registrant as specified in its ...