Investor Presentaiton

2023 Alaska Investor Trip Alaska in the Santos Portfolio World-class asset in OECD country with internationally competitive investment environment • Project Phase 1 final investment decision (FID) taken August 2022 Alaska is a material part of the Santos resource base Pikka 2P Reserves 2C Resources Committed to net-zero project (Scope 1 and 2, equity share) Alaska (2) Alaska (2)- 165 438 1,745 mmboe 3,280 mmboe • Alaska creates portfolio • diversification (product and geography) in an OECD(1), business friendly environment Material, liquids-rich asset in existing leasehold position - Presents opportunities for further growth in gas, carbon capture and abatement Phase 1 cash flows will fund future opportunity set and return cash flow to corporation and shareholders Flexibility in pace of portfolio maturation 1 Organization for Economic Cooperation and Development 2 Year-end 2022 reserves (2P for Pikka Phase 1) and resources (2C for Alaska) Santos portfolio STO net M Papua New Guinea PNG LNG Timor-Leste Barossa Dorado Moomba Brisbane Narrabri Parth Australia Horseshoe Alaska Quokka O Office locations ° Operated faction O Non-perated facilities Development projects Planned project location Planned carbon capture and storage Sentoe operated exploration acreage Non-operated exploration acreage Of postres -Gas pipelnes Santos

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