Rio Tinto filed a Form 6-K summarising a series of December 2025 announcements by Rio Tinto plc and Rio Tinto Limited. The report bundles stock exchange notices and media releases on capital structure, management shareholdings, project development and community agreements.
Key items include an updated total voting rights and issued capital statement, several disclosures on shareholdings of persons discharging managerial responsibility and key management personnel, and notifications of unquoted equity securities and director interest changes. Operationally, the exhibits cover initial reporting of lithium Mineral Resources and Ore Reserves, a lithium-focused investor "Deep Dive" and site visit to Argentina, first copper produced using Rio Tinto’s Nuton technology, and a media release on battery-electric haul trucks in the Pilbara with BHP. The filing also highlights Indigenous agreement updates and a $191 million feasibility study for the Rhodes Ridge Joint Venture on an iron ore mine of up to 50Mtpa in the Pilbara.