Rio Tinto stock advances Resolution Copper with USD 144 million step
Published on 11/12/2026 at 11:13 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWSProject spending advances copper plans
- Resolution Copper will fund feasibility work, engineering, drilling, equipment purchases and water-treatment facilities.
- Rio Tinto operates the Arizona joint venture with BHP and holds a 55 percent interest.
- The program is intended to position the project for its next investment decision.
Rio Tinto has approved a USD 144 million investment by Resolution Copper to advance the next phase of its Arizona project, according to the company on Thursday, November 5. Rio Tinto's share of the spending is USD 79 million, while the joint venture continues to be held with BHP.
Rio Tinto stock traded at 76.15 euros on Xetra at 10:54 CET on Thursday, November 12, 0.59 percent below the Xetra close of 76.60 euros on Wednesday, November 11. The quote was 0.45 euros lower than the prior-session close.
Engineering leads the next phase
The investment will finance feasibility studies and final design engineering for development- and production-level material-handling equipment in both mine shafts. It also covers new water-treatment facilities, ongoing exploration drilling, underground development and production equipment, plus long-lead electrical equipment.
The spending follows completion of a historic land exchange in March 2026, which opened the next phase of the project. It comes in addition to approximately USD 500 million of preliminary spending announced at that time. The program is expected to create approximately 50 additional roles in mining, geotechnical and geological disciplines, engineering and project services.
Resolution Copper Mining operates the project as a joint venture owned 55 percent by Rio Tinto and 45 percent by BHP. Rio Tinto Copper Chief Executive Katie Jackson said the project could supply up to 25 percent of America's copper demand for decades and strengthen domestic supply chains. She described the latest funding as another step toward the next investment decision while underground operations and construction continue.
Execution remains the key investor issue
The project is one of the largest undeveloped copper deposits in the United States, with the deposit located between 5,000 and 7,000 feet underground near Superior, Arizona. The new spending improves engineering and development readiness, but the path to production still depends on further project work and the next investment decision.
Rio Tinto plc at a glance
- Company: Rio Tinto plc
- ISIN: GB0007188757
- Home exchange: London Stock Exchange
- Xetra quote: 76.15 euros at 10:54 CET on Thursday, November 12, 2026
- Change: Down 0.45 euros, or 0.59 percent, against the Xetra close of Wednesday, November 11
- Project: Resolution Copper, Arizona
The company said the project has the potential to become one of the largest copper mines in the United States and contribute approximately USD 1 billion annually to Arizona's economy. The development therefore gives Rio Tinto additional long-term copper exposure, while the immediate investor focus remains on capital execution and the timing of the next investment decision. The full announcement is available from Rio Tinto.
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Further project updates and analysis are available in More news and analyses on Rio Tinto stock.
