Slide 1: Gold Fields partners with Osisko Mining on the Windfall Project & Exploration Camp
Gold Fields partners with Osisko Mining on the Windfall Project & Exploration Camp in Québec, Canada May 2023 1
Slide 2: Important information
Important information Forward-Looking Statements This announcement contains forward-looking statements within the meaning of the “safe harbour” provisions of the United States Private Securities Litigation Reform Act of 1995. All statements other than statements of historical fact included in this a
Slide 3: Partnering on a world class asset in a Tier 1 jurisdiction
Partnering on a world class asset in a Tier 1 jurisdiction Strong ESG track record JV with an experienced AISC of <US$800/oz Significant expansion and + 10 years of reserve life that will advance our ESG Canadian partner (<C$1,000/oz) exploration potential journey and commitments • Partnering with O
Slide 4: Commercial terms and operating structure
Commercial terms and operating structure Transaction Immediate formation of a 50/50 partnership jointly run by parties through equal representation Partnership Partnership covers feasibility stage Windfall project and the highly prospective Urban Barry and Scope Quévillon camps Cash purchase of 50%
Slide 5: #ThisIsGoldFields
‘ #ThislsGoldFields Where we want to go | To be the preferred gold mining company delivering sustainable, superior value Enablers + Zero harm (Safety, Health, Environment) : Differentiators and Wellbeing + High performance, values-driven culture that is welcoming to all Develop and enhance capabilit
Slide 6: Windfall meets all of Gold Fields' key strategic criteria
Windfall meets all of Gold Fields’ key strategic criteria for improving the value and quality of our portfolio Asset Quality Jurisdictional Strengthen ESG (LoM+AISC) Quality Pipeline Commitment AISC <US$ 800/oz Québec, Canada Camp scale, long life, OSK’s ESG practices (<C$1,000/oz); pre-construction
Slide 7: Why Windfall?
Windfall is an exceptional deposit 1 Size Why Windfall? Windfall • Only 10% of Superior 3 Growth prospects of Windfall deposit Province Au An exceptional deposit discoveries >5Moz 2 Grade If in production today, Windfall would be in the top 10 highest grade Full resource focused in a zone from surfa
Slide 8: Feasibility Study highlights and 2023 progress
Feasibility Study highlights and 2023 progress Conservative FS mine plan with optimisation and expansion opportunities, low-cost producer • 10-year LOM based on Reserves only for 3.2 Moz Au • First production expected in 2025 subject to permitting and finalisation Windfall comparison to Québec and O
Slide 9: Ramp-up and expansion potential, de-risked with significant drilling
Ramp-up and expansion potential, de-risked with significant drilling Current Ramps 12.5km *Current LOM planned from 3 key zones: Lynx, Main & Underdog. 1 *Main We see upside from extensions of mineralisation at depth 600m 3 *Lynx Significant underground development already in place Quick ramp-up pos
Slide 10: Strong ESG credentials that complement our 2030 targets
Strong ESG credentials that complement our 2030 targets Note: 2021 is the latest published ESG data for Osisko. 2022 data expected to be published mid-2023 as per the 2020 and 2021 reports Excellent ESG track record to date Gold Fields and Osisko partnership 10
Slide 11: Regional Exploration Package
Regional Exploration Package
Slide 12: Camp scale opportunity
Camp scale opportunity Osisko’s fully controlled exploration camp relative to Val D’Or mining camp Windfall MII Resource 7.4Moz Au Osborne Bell 4.1Moz M&I @11.4 g/t Au 0.51 Moz @6.13 g/t (Inf) 3.3 Moz Inf @ 8.4g/t Osisko ~2,400 km2 Scale 35km 1 8 7 Val D’Or Mining mining Camp camp ~1,400 km2 , ~100M
Slide 13: Regional Exploration
Regional Exploration Multiple high-grade targets emerging within 5km haulage distance Fold 3.3 m at 3.0 g/t Au Golden Bear 6.7 m at 27.4 g/t inc. 2.7 m at 63.6 g/t Fox 32km drilling 11.6 m at 3.2 g/t Au 7 mineralised pods 3.1 m at 27.6 g/t Au Fox West 2.8 m at 16.7 g/t Au inc. 1.0 m at 45.0 g/t Au N
Slide 14: Appendices
(— : OSISKO MINING Appendices
Slide 15: 2022 Feasibility Study
Appendix 2022 Feasibility Study Note: Pre-construction capital estimate of C$200m not included Extracted from Osisko’s Windfall Feasibility Study available on SEDAR filed 10 January 2023, figures stated on 100% basis Gold Fields and Osisko partnership 15
Slide 16: Windfall Mineral Reserves & Resource Estimates
Appendix Windfall Mineral Reserves & Resource Estimates Extracted from Osisko’s Windfall Feasibility Study available on SEDAR filed 10 January 2023, figures stated on 100% basis Gold Fields and Osisko partnership 16
Slide 17: Appendix: Windfall in pictures
Appendix: Windfall in pictures Underground wash Bay at Windfall Bulk sample at Windfall Long hole drilling at Windfall Gold Fields and Osisko partnership 17
Slide 18: Appendix: Windfall in pictures
Appendix: Windfall in pictures Underground portal at Windfall Exhaust fans Gold Fields and Osisko partnership 18
Slide 19: Thank You
THANK YOU QUESTIONS