RIO2 ANNOUNCES FILING OF PROSPECTUS SUPPLEMENT IN CONNECTION WITH PREVIOUSLY ANNOUNCED “BOUGHT DEAL” EQUITY FINANCING

NOT FOR DISTRIBUTION TO UNITED STATES NEWS WIRE SERVICES OR FOR DISSEMINATION IN THE UNITED STATES For Immediate Release December 11, 2025 VANCOUVER, BC – Rio2 Limited (“ Rio2 ” or the “ Company ”) (TSX: RIO; OTCQX: RIOFF; BVL: RIO) today announced that it has filed a prospectus supplement dated December 10, 2025 (the “ Prospectus Supplement ”), to its short form base shelf prospectus dated October 16, 2024, as amended pursuant to amendment no. 1 to such short form base shelf prospectus dated...