Mining Stock Daily

Morning Briefing: PDAC Underway with Big M&A News - Hudbay to Acquire Arizona Sonoran

Mar 2, 2026
A fast PDAC briefing packed with major M&A action as Hudbay moves to buy Arizona Sonoran and implications for the Cactus Project. Updated resource estimates and exploration upside at Rio Grande get attention. Big resource growth at O'Brien and a new lithium converter scoping study in Yellowknife are discussed. Plus a strategic mine acquisition in Timmins and significant warrant exercise proceeds.
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INSIGHT

Hudbay Acquisition Creates Large Copper Platform

  • Hudbay Minerals is acquiring Arizona Sonoran Copper for about C$1.5 billion to combine Cactus with Hudbay's Copper World for large-scale copper output by 2030.
  • The deal values Arizona Sonoran at C$9.35 per share, a ~30% premium to its close and implies >250,000 tpa copper with potential >350,000 tpa as Cactus stages development.
INSIGHT

Rio Grande Shows Open‑Ended Polymetallic Potential

  • Aldebaran and Centauri Metals updated the Rio Grande MRE showing significant gold and copper in both indicated and inferred categories.
  • Indicated contains 1.45 Moz Au and 384,000 t Cu while inferred adds 1.5 Moz Au and 240,000 t Cu, with mineralization open at depth and many holes ending in sulfides.
INSIGHT

O'Brien Resource Grows Dramatically With Deep Drilling

  • Radisson Mining's updated O'Brien MRE shows an 82% increase in inferred gold from step‑out drilling to 1.69 Moz at ~5 g/t.
  • The company is running a fully funded 140,000 m step‑out program to test mineralization to 2 km depth continuing through next year.
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