The playbook — copper · October 21, 2026
Hudbay greenlights Copper World, a new U.S. copper mine for 2029
Board approval turns an Arizona copper project from study into a 36-month build, with Mitsubishi as a 30% partner and first metal targeted for H2 2029.
On October 21, Hudbay Minerals and its partner Mitsubishi pulled the trigger on Copper World, a copper project in Pima County, Arizona. The two boards approved construction — the moment a project stops being a study and becomes a thing you actually build. Hudbay owns 70%, Mitsubishi the other 30%. The plan calls for $2.07 billion in initial capital over a 36-month build, with first copper targeted for the second half of 2029. This is the same company we covered when Hudbay stretched Snow Lake’s gold life out to 2043; this time the story is copper, not gold.
The decision rests on a definitive feasibility study, so there are no new drill holes to weigh — the geology that matters is the reserve. Copper World carries proven-and-probable reserves of 390 million tonnes at 0.47% copper, with a 15-year mine life and a strip ratio of 1.5 (you move 1.5 tonnes of waste for every tonne of ore). For a bulk-tonnage open-pit copper deposit, 0.47% copper is a genuinely strong grade and that low strip ratio is favorable — less waste to haul means lower cost. Measured-and-indicated resources run deeper at 1.2 billion tonnes at 0.40% copper. CEO Peter Kukielski has built big mines before, running ArcelorMittal’s 27-mine portfolio and serving as COO at both Teck and Falconbridge. Over the last three months the stock rose 2.7% while copper gained 0.7% and the copper-equity index slipped 0.6% — a narrow edge, and the sparkline shows the shares touched roughly C$42 mid-period before fading back to C$33.
What to watch: Hudbay says it will file an NI 43-101 technical report on the DFS — timing not stated — and expects to close upsized $700 million senior credit facilities in Q4 2026. The company’s own first equity contribution to the joint venture is deferred to 2028. The caveats are real. Roughly $650 million of project-level debt is still only “anticipated” — lenders and terms are not yet set. The base-case economics assume $5.00 per pound copper, above many long-term analyst estimates, and the returns drop as that price falls. A longer 37-year “Extension Case” needs federal permits by year 10 that are not yet in hand.