OceanaGold (OGC) Corporate presentation summary

Portfolio and 2026 guidance

• Four operating mines in the USA, New Zealand and the Philippines; 2026 guidance of 520–590 koz gold, 13–15 kt copper and $1,750–$1,900/oz AISC.

• Total gold reserves of 5.8 Moz and measured and indicated resources of 8.6 Moz, inclusive of reserves, based on 2025 year-end estimates.

• Haile is expected to drive 2026 production growth; its guidance is 235–260 koz gold, compared with 135–155 koz at Macraes, 60–75 koz at Waihi and 85–105 koz at Didipio.

Production growth and projects

• Indicative production profile reaches potential of ~650,000 oz/year, with Katanning included; Katanning first gold is expected in 2029 and annual production potential exceeds 100,000 oz, subject to acquisition closing.

• Haile first ore is expected from Palomino Underground in 2028 and Ledbetter Underground in 2029; average production is expected to be 210,000 oz/year from 2027–2031 inclusive.

• Macraes targets ~100,000 oz/year into the late 2030s; MP4 and further opportunities could extend mine life into the 2040s.

• Waihi North is advancing toward Wharekirauponga Underground, with first ore expected in 2032; the updated technical report is expected in January 2027.

• Katanning is described as a conventional, low-capital open-pit development with a 10-year mine life and +100,000 oz/year production potential.

Exploration and responsible operations

• Planned 2026 exploration spend is $60M, up ~50% from $40M in 2025; priorities include resource-to-reserve conversion, brownfield growth and greenfield opportunities.

• 27% of short-term incentive KPIs are sustainability-related; the 2026 scorecard covers production, growth, culture, cost and continuous improvement, health and safety, and environment, energy and carbon.

• Wharekirauponga drilling included 6.3 m at 97.2 g/t Au and 8.5 m at 41.5 g/t Au; the stated reserve is 1.2 Moz at 9.2 g/t Au.

• No operational disruptions from the Iran conflict had occurred to date; 80% of diesel at Haile and Macraes is hedged at ~ $65/bbl on a rolling 12-month basis.