Investor Update April 2022

Gas Business QoQ: Pool price increased from LNG import and lower NG vol. from soften power demand as well as pressured gas supply 2021 vs 2020: Increased gas sales vol., higher industrial selling prices referenced to FO price NG Price VS FO & Customer Breakdown ptt NGV Price & Sales Volume FO (2%) NG Price ૨૦૨ YOY 5% Pool Price 19% 62% 43% NGV Avg. price Unit: THB/KG 3% QoQ 15% YoY I I 1% $/MMBTU 2021vs2020 64% 5% $/TON 15.5 14 464 500 443 Fuel Oil 397 367 15.0 13.5 14.2 14.4 12 HSFO 180 CST 2%S 400 286 10 10 281 262 300 188 8.14 NGV Sales Vol. 8 7.23 6.84 200 19% QoQ 20% 6.79 6.36 Unit: K.Ton/Day 6.20 5.68 5.89 18% YoY 6 100 Avg. Pooled gas price AVG. 2021 = 6.78 AVG. 2020 = 6.48 4 T 3.9 4.0 1Q20 2Q20 3Q20 4Q20 1Q21 2Q21 3Q21 4Q21 3.2 3.2 2.7 NG Vol. Unit: MMSCFD 2% QoQ 2% YoY 1% 4,437 4,255 4,224 4,158 4,394 163 159 131 NGV (3%) 112 129 709 779 Industry (18%) 739 764 762 909 920 857 909 GSP (20%) 865 1,258 1,355 1,281 1,331 SPP (30%) 1,312 476 546 509 514 703 627 576 786 4Q20 3Q21 4Q21 2020 587 IPP (13%) 700 2021 4Q20 3Q21 4Q21 2020 2021 Key Highlights ૨૦૨ ▼ EGAT (16%) - Avg. pooled gas price increased from imported LNG and Myanmar gas Decreased overall NG sales volume mainly from power producers due to seasonal demand and lower gas supply + Industrial selling prices linked to FO increased + NGV vol. increased from easing lockdown and the cap of NGV price 2021 vs 2020 + NG sales vol. increased from industrial customers due to the recovery of economic activities + Industrial selling prices improved according to FO price linked - NGV sales vol. dropped from lockdown measuresand switching to alternative fuels 38

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