PTTEP Project Details and Financial Performance

Unit Cost Unit: $/BOE 28.36 29.32* ** 30 26.07* 26.54 Cash Cost 20 Unit Cost 14.56 ☑ 15.22 14.25 13.11 ☑ Х 10 DD&A Finance Cost Royalties G&A Exploration Expenses Operating Expenses Lifting Cost 2022 Q4 22 Q1 23 Q1 22 13.80 14.10 11.82 13.43 1.37 1.21 1.86 1.35 4.02 3.78 3.39 4.27 2.46 ** * 3.36 2.20 2.23 0.42 0.16 0.26 0.15 6.29 6.71 * 6.54 5.11 4.42 4.64 4.48 3.87 * Note: Exclude Bongkot Goodwill write-off (OPEX) ** Exclude Montara Class action settlement (G&A) All Unit Cost shown above exclude costs related to new business The formulas for calculating ratios are provided in the supplementary section for your reference 15 PTTEP

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