Slide 1: 30 June 2025 Reserves Report
30 June 2025 Reserves Report 26 September 2025
Slide 2: Disclaimer
Disclaimer This presentation contains certain forward-looking statements that are subject to the usual risk factors and uncertainties associated with the oil and gas exploration and production business. Whilst Tullow believes the expectations reflected herein to be reasonable in light of the informa
Slide 3: PRMS classification
PRMS classification Production Project maturity sub-classes Commercial On Production (OP) Reserves Approved for Development (AD) Discovered PIIP Total petroleum initially-in-place Justified for Development (JD) Increasing chance of Development Pending Sub-Commercial commerciality Development On Hold
Slide 4: 2P reserves by category
2P reserves by category 30 June 2025 Oil Gas Total oil equivalent Reserves category (mmstb) (bscf) (mmboe) On Production (OP) 52.3 99.9 68.9 Approved for Development (AD) 10.4 42.7 17.5 Justified for Development (JD) 26.3 6.6 27.4 Total reserves 88.9 149.2 113.8 • The table represents the volumes in
Slide 5: 2P reserves by category split by country/asset
2P reserves by category split by country/asset 30 June 2025 Oil Gas Total oil Oil Gas Total oil Jubilee (Ghana) reserves equivalent Côte d’Ivoire reserves equivalent (mmstb) (bscf) (mmboe) (mmstb) (bscf) (mmboe) On Production (OP) 47.6 99.3 64.1 On Production (OP) 0.3 0.6 0.4 Approved for Developmen
Slide 6: Economics
Economics The economics below are presented pro forma the Gabon disposal which completed on 29 July 2025 NPV10 net to Tullow, as of 1 July 2025 ($m) Price deck • Economic evaluation is based on the average Jubilee 1,609.9 of Brent ICE Futures Europe Strip for each of TEN (21.3) the 30 trading days b
Slide 7: Tullow Oil plc
Tullow Oil plc 9 Chiswick Park, 566 Chiswick High Road London W4 5XT United Kingdom Tel: +44 (0)20 3249 9000 Email: ir@tullowoil.com Web: www.tullowoil.com