Rio Tinto stock: Company approves $144 million copper step
Published on 11/09/2026 at 11:00 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWSResolution Copper adds development momentum
- Resolution Copper will fund engineering, drilling, equipment purchases and water-treatment facilities in Arizona.
- The project builds on USD 500 million of preliminary spending announced in March 2026.
- The next phase is intended to position the joint venture for its next investment decision.
Resolution Copper will invest USD 144 million to advance its next development phase in Arizona, giving Rio Tinto further exposure to a large undeveloped copper project in the United States. The announcement was made on Thursday, November 5, 2026, by Resolution Copper in a PR Newswire release.
Resolution Copper Mining is owned 55% by Rio Tinto subsidiary Resolution Copper Company and 45% by BHP Copper. Rio Tinto's share of the latest investment is USD 79 million. The spending follows approximately USD 500 million of preliminary investment announced after a historic land exchange in March 2026.
Engineering and drilling move forward
The funds will support feasibility studies and final design engineering for development and production-level material-handling equipment in both mine shafts. The program also includes new water-treatment facilities, exploration drilling, underground development and production equipment, and long-lead electrical items such as transformers, circuit breakers and switchgear.
Resolution Copper said it plans to add 50 roles across mining, geotechnical and geological work, engineering and project services. The deposit lies between 5,000 and 7,000 feet underground near Superior, Arizona, and the project has the potential to become one of the largest copper mines in the United States.
Next investment decision remains key
Resolution Copper President Vicky Peacey said the program should accelerate underground development and the path toward first copper production while maintaining safe construction and operations. For investors, the announcement increases the project pipeline behind Rio Tinto's copper strategy, but the next investment decision remains an important milestone for capital allocation and execution.
Rio Tinto stock traded at 76.63 euros on Lang & Schwarz at 10:52 CET on Monday, November 9, 2026.
Rio Tinto at a glance
- Company: Rio Tinto plc
- ISIN: GB0007188757
- Announcement: USD 144 million Resolution Copper investment on November 5, 2026
- Rio Tinto share: USD 79 million
- Lang & Schwarz quote: EUR 76.63 at 10:52 CET on November 9, 2026
The wider FTSE 100 market remains the relevant UK equity backdrop for Rio Tinto, as shown in the FTSE 100 market coverage.
