Arizona Sonoran Copper Company (ASCU) investor relations material

Deal rationale and strategic fit

• Acquisition creates the third-largest copper district in North America by combining two major Arizona copper assets, establishing a major copper hub and enhancing exposure to copper growth opportunities.

• Strengthens position as a leading Americas-focused copper producer with a robust development pipeline and long-life, low-cost assets in top jurisdictions.

• Provides Arizona Sonoran shareholders with a significant premium and participation in a diversified, well-capitalized, industry-leading copper growth platform.

• Enhances ability to supply US-refined copper, supporting the domestic critical mineral supply chain and U.S. critical minerals strategy.

• Reduces execution and financing risks for the acquired company’s flagship project by leveraging the acquirer’s established platform and balance sheet.

Financial terms and conditions

• Arizona Sonoran shareholders receive 0.242 Hudbay shares per share, implying C$9.35 per share and a 30% premium to last close and 36% to 20-day VWAP.

• Equity value of the deal is US$1,480 million; enterprise value to Hudbay is US$1,278 million after accounting for existing ownership.

• Post-transaction, Hudbay and Arizona Sonoran shareholders will own approximately 89% and 11% of Hudbay, respectively.

• Transaction unanimously approved by both boards, subject to Arizona Sonoran shareholder and customary regulatory, court, and stock exchange approvals.

• Includes customary deal protections, non-solicitation covenants, and a termination fee.

Synergies and expected cost savings

• Creation of an Arizona operating hub enables shared technical and support functions, centralized permitting, and development activities, with operational efficiencies from staged project development.

• Anticipated corporate-level synergies of $5–10 million annually from reduced G&A, enhanced commercial terms, and optimized tax structures.

• Regional purchasing power, tax pooling, and internal sulfuric acid supply expected to drive further efficiencies and stable reagent costs.

• Strategic redeployment of construction teams and use of by-products (e.g., sulphuric acid) between projects.