Investor Presentaiton

Gas Business QoQ: Gas pool price surged from LNG import while overall gas volume improved 2021 vs 2020: Increased gas sales vol., higher industrial selling prices referenced to FO price NG Price VS FO & Customer Breakdown NGV Price & Sales Volume NG Price ૨૦૨ FO (2%) 22% Pool Price 34% $/MMBTU YOY 2021vs2020 54% 85% NGV Avg. price Unit: THB/KG ૨૦૦ 16% YoY 1% 64% 5% $/TON 15.5 15.5 14 566 600 14.2 14.4 Fuel Oil 464 12 HSFO 180 CST 2%S 500 13.4 I 443 397 10.90 367 I 400 10 286 281 262 I 300 NGV Sales Vol. 8 188 T 8.14 7.23 6.84 I 5.79 200 6.20 5.68 5.89 6.36 Unit: K.Ton/Day 3% QoQ 11% YoY I 20% 6 Avg. Pooled gas price 100 AVG. 2021 = 6.78 AVG. 2020 = 6.48 4 1Q20 2Q20 3Q20 4Q20 1Q21 2Q21 3Q21 4Q21 1Q22 4.0 3.7 3.2 3.3 3.2 NG Vol. Unit: MMSCFD 6% QoQ 4% YoY 1% ptt 1Q21 4Q21 1Q22 2020 2021 4,619 4,422 4,437 150 4,158 4,394 136 786 129 791 163 709 131 779 NGV (3%) Industry (18%) Key Highlights 762 ૨૦૨ ▼ 957 846 909 909 GSP (20%) 865 1,323 1,290 1,281 1,312 1,331 SPP (30%) I 598 580 546 514 805 576 779 786 1Q21 4Q21 1Q22 2020 587 IPP (13%) 700 2021 EGAT (16%) Avg. pooled gas price surged from higher vol. of imported LNG during high price and increased Myanmar and gulf gas prices + Increased overall NG sales volume mainly from power producers due to lower hydro import + Industrial selling prices linked to FO increased following oil 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 39

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