In a major win for U.S. critical mineral supply chains, Energy Fuels successfully produces high-purity terbium oxide in Utah from ore mined in Florida and Georgia, demonstrating the first U.S. mine to oxide capability to provide a secure western source of "heavy" rare earth oxides used in key commercial and defense technologies. DENVER, March 25, 2026 /PRNewswire/ - Energy Fuels Inc. (NYSE: UUUU) (TSX: EFR), a leading U.S. producer of uranium, rare earths, and critical materials, today announced it has successfully produced its first kilogram (kg) of terbium (Tb) oxide at its White Mesa Mill in Utah.