Investor Presentaiton

2C Gross Oil Resources (MMBO) 1,600 1,400 1,200 1,000 2023 Alaska Investor Trip Santos Pikka, Horseshoe, Mitquq, and Stirrup Discoveries Pikka was the largest North American onshore oil field discovery in 30 years at the time of discovery, with strong Santos-led follow-on exploration success Santos Alaska Gross 2C Resource History Exploration Wells 416 (Gross) 173 (Net) 450 (Gross) 177 (Net) 112 (Gross) 46 (Net) 1,082 (Gross) 438 (Net) -397 (Gross) -165 (Net) 800 500 (Gross) 600 208 (Net) 400 200 0 Acquisition Pikka 2019-2022 Additions Quokka 2020-2022 Additions Horseshoe 2019-2022 Additions Pikka Phase 1 2P Reserves YE2022 2C ** STO Units Nanushuk Fairways STO Discovery Exploration well on acreage Exploration well off acreage Pikl ai Stony Hill Terminal Pikka Unit Pikka C Nanushuk Coyote/Palm Qugruk 3 Mitquq 1/ST 1 Pikka B Putu Quokka Unit orsesho Fairway Horseshoe 1/1A e Horseshoe Unit • • • The Pikka field was discovered in 2013 with the Qugruk-3 well encountering significant pay in Nanushuk 3 Horseshoe discovery in 2017 confirmed a giant oil discovery across the entire Nanushuk-3 fairway Successful appraisal of Pikka underpinned by 21 penetrations in the Nanushuk 2/3 with a robust geologic dataset to constrain reservoir properties, including Pikka B and Pikka C appraisal wells successfully drilled and flow tested by Santos in 2019 • Successful 2020 exploration season, with the Mitquq and Stirrup discoveries • Added 563 MMBO (223 Net) 2C resource from Mitquq-1 and Stirrup-1 exploration wells and Placer acquisition Stirrup 14 M · Significant additional upside prospective resources remain to be appraised Quokka Fairway 0 5 10 Miles NPRA State Lands

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