UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 For the fiscal year ended December 31, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to 001-42883 (Commission File Number) RICE ACQUISITION CORPORATION 3 (Exact name of registrant as specified in its charter) FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Cayman Islands 98-1863122 (State or other ...

FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-42883 RICE ACQUISITION CORPORATION 3 (Exact Name of Registrant as Specified in Its Charter) | Cayman Islands | 98-1863122 | | --- | --- | | (State or other jurisdiction of | (I.R.S. Employer | | inc ...

As filed with the U.S. Securities and Exchange Commission on September 23, 2025. Registration No. 333-289938 Cayman Islands 6770 98-1863122 (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial Classification Code Number) (I.R.S. Employer Identification No.) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 2 TO FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ____________________ Rice Acquisition Corporation 3 (Exact ...

____________________ Cayman Islands 6770 98-1863122 As filed with the U.S. Securities and Exchange Commission on September 18, 2025. Registration No. 333-289938 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ____________________ AMENDMENT NO. 1 TO FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ____________________ Rice Acquisition Corporation 3 (Exact name of registrant as specified in its charter) (I.R.S. Employer Identification No.) 102 East Main Street, Second S ...

As filed with the U.S. Securities and Exchange Commission on August 29, 2025. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ____________________ FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ____________________ Rice Acquisition Corporation 3 (Exact name of registrant as specified in its charter) ____________________ Cayman Islands 6770 98-1863122 (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial Cla ...