PTTEP Non-Deal Roadshow by Daiwa… - May 15, 2025

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Investor Presentation May 2025

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Business Update Company and Strategy Overview Financials

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Company OverviewCompany Overview 3 Unit Cost Optimization 43.60 29.58 ~30 2014 2024 Committed to Ensuring the Nation's Energy Security 322 489 505-510 2014 2024 Sales Volume Growth -32% +52% Unit: USD/BOEUnit: KBOED Thailand Myanmar Malaysia Middle East BN USD Market Capitalization 12 Top 10 Publicly Listed Company in SET (Stock Exchange of Thailand) 3,970 Million Shares As of book closing Feb 2025 PTT 64% Retails 6% Africa8% FY2024 Dividend Yield 2025(E) 0% Volume Mix Liquid ~30% 50% 100% Gas ~70% 2025(E) ~15 USD/BOE Competitive Cash Cost Sustainability Framework Level “B” Level “BBB” 2016-2024 AA 2024 National Oil Company Energy Security International Growth Value Creations Strategic Foothold Countries 82% Market Share

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Source: CERAWeek, PTTEP Energy Strategies for a Complex World Energy Security & Natural Gas Geopolitical Landscape Future Energy Investment Rising of AI & Energy Demand Energy Security, Geopolitics reshape a World of Energy Transition Shifting Focus in Energy Industry Securing the Future with Cleaner Gas as a “Destination Fuel” Balancing Climate Commitments with Energy Security AI Accelerates Energy Demand and Efficiency Energy Dynamics & U.S. Tariff Reshaping Strategies Next-Gen Clean Energy Gains Traction Amid Challenges PTTEP Strategy Drive Value Gas Focus Portfolio Decarbonize for cleaner gas Diversify for energy transition 4 Maximize gas supply from 3 gas corridors Drive cost competitiveness through GoT SAVE Initiatives Seek international growth in focus areas Implement GHG reduction initiatives to achieve Net Zero Target by 2050 Push forward Arthit CCS (Thailand’s Pilot CCS) Pursue CCS Hub in Thailand (CCSaaS) Capture value from offshore windfarm project Explore future energy sources 5 YearBudget: $32.3 Billion 5 YearBudget: $0.5 Billion 5 YearBudget: $0.7 Billion

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ARV is a Ventures Builder principally engaged in the research, development and provision of solutions using Artificial Intelligence and Robotics technologies, as well has ventures ideation, incubation, development and commercialization. VENTURES BUILDER ARV has successfully spun-off start-ups into separate legal entities focused on further commercialization and development of their respective deep-tech domains. BUSINESS UNITS JOINT VENTURES ROVULA JOINT VENTURES VARUNAJOINT VENTURES SKYLLER JOINT VENTURES CARIVA Unmanned Robotic Technologies and Data Analytics for Marine, Offshore and Underwater Assets AI-driven and Autonomous Aerial Drone Technologies, Operations and Data Analytics for Various Industries and Operations One-Stop Agriculture and Climate Technology Solutions Health Solutions Platform that Simplifies Data Access, Manage Security and Accelerates the Creation of Digital Health Solutions Geospatial Location Intelligence Platform and AI Technology to provide advanced location insights XGATEWAY Unmanned Surface Vehicle for Hydrographic Survey and Surveillance XPLORER Autonomous Underwater Vehicle for Subsea Pipeline Inspection NAUTILUS Underwater Robotic System for Inspection, Repair & Maintenance of Subsea Pipelines XSPECTOR IA cloud-based data management platform specifically tailored for subsea inspection and survey operations HORRUS Autonomous Nested Drone Systems for Asset Inspection, Surveillance and Mapping SKYLLER PLAFORM Data Platform for Fleet Management, Data Visualization and Analytics SKYLLER AI ML AI-Assisted anomalies detection for fast and accurate decision making UAV LOGISITIC Drone Delivery Solutions for intra-city, long range and remote delivery of critical cargo and parts AiANG SPRAYER UAV UAV for blanket and precision- spraying services for various crops SMART FOREST Green Area management platform and carbon credit solutions CARBON CREDIT TOKENIZATION PLATFORM Platform enables seamless trading of carbon credit using blockchain technology KANNA CARBOM FARMING Mobile application for productivity improvement and carbon project registration HEALTH APPLICATIONS Variety of completed health applications for health and wellness solutions HARDWARE SOLUTIONS Seamless integrate to software with IoT and Robotics solutions BUILDING BLOCKS Data management and software API platforms for building the custom-made digital health solutions. AI HEALTH PRODUCTS AI-powered solutions for personalized health care and precision medicine BUILDING PERMIT PLATFORM ASSET MANAGEMENT PLATFORM MUNICIPAL TAX PLATFORM Platform to supporting cities to operate urban infrastructure components and services efficiently with data connectivity Allows government offices to monitor, review and update assets’ status for informed evaluation and decision making The integration of AI and GIS to streamline rive accurate, quick and convenient permission processes for officer and citizen One-stop tax collection & valuation intelligent system to facilitate citizens for submission of online petition form, payment check and status tracking CITY DIGITAL DATA PLAFORM 29 GREEN ARANYA (GARY)

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Project Name Status Phase Participating Interest* (%) Production Volume Latest StatusGas (MMSCFD) Liquid (KBPD) 1 G1/61 (Erawan) OP Production PTTEP 60%**** 723 21 • Ramp-up to 800 MMSCFD since 20 March 2024 • Continue investment for additional wellhead platforms installation and production well drillings to sustain production 2 G2/61 (Bongkot) OP Production PTTEP 100% 634 20 • Maintain gas production • Continue investment for additional production platforms installation and development well drillings to sustain production 3 Arthit OP Production PTTEP Chevron MOECO 80% 16% 4% 328 15 • Achieved production target to surpass Daily Contracted Quantity under the GSA • continue the production well drilling in order to boost production 4 Contract 4 (Pailin) JV Production PTTEP Chevron MOECO 60% 35% 5% 416 14 • On-going additional development wells drilling activities, with the aim to maintain production plateau 5 MTJDA (Malaysia- Thailand Joint Development Area) JOC Production PTTEP CPOC 50% 50% 287 10 • On-going production well drilling to sustain production levels 6 Sinphuhorm OP Production PTTEP Apico ExxonMobil 55% 35% 10% 91 0.2 • PTTEP acquired additional 27.18% stake in APICO LLC from Jadestone with the completion effective from 16 April 2025. 7 B8/32 & 9A JV Production PTTEP Chevron MOECO KrisEnergy Palang Sophon 25.00% 51.66% 16.71% 4.63% 2% 38 9 • Continue additional development well drillings to sustain production Note: * PTTEP denotes respective PTTEP subsidiaries participating in the project ** Production volume represent average volume for 100% of the project in Q1/2025 *** Status: OP = PTTEP operatorship / JOC = PTTEP joint operatorship/ JV = PTTEP Joint Venture Partner **** PTTEP’s Participating interest under Production Sharing Contract is 60%, however, PTTEP has agreed for sole investment in the project, since 1 December 2021. 36 E&P Projects Detail - Thailand

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Note: * PTTEP denotes respective PTTEP subsidiaries participating in the project ** Production volume represent average volume for 100% of the project in Q1/2025 ** Status: OP = PTTEP operatorship / JOC = PTTEP joint operatorship/ JV = PTTEP Joint Venture Partner Project Name Status Phase Participating Interest* (%) Production Volume Latest StatusGas (MMSCFD) Liquid (KBPD) 1 Malaysia Block K - Kikeh - Siakap-North Petai field (SNP) - Gumusut-Kakap field (GK) OP (Kikeh & SNP) JV (GK) Production PTTEP Kikeh 56% SNP 22.4% GK 7.17% 16 21 • Normal operations 2 Malaysia SK309 and SK311 OP Production PTTEP 42 – 59.5% 134 10 • Normal operations 3 Malaysia Block H OP Production PTTEP 42 – 56% 149 - • The additional two exploration wells are planned to be drilled as per minimum work commitment in 2025. 4 Malaysia – Other projects OP Exploration PTTEP 42.5 - 80% (varied by permits) - - • SK410B : Completed FEED study for LLB. It is in the process of re- engineering design to strengthen project’s economic viability. • SK417 : Preparing for one exploration well, which is expected to be drilled in 2025. • SK405B : Preparing for field development plan, with completion expected by 2025. • SK438 : The project discovered massive sweet gas sandstone reservoirs with thickness up to 200 meters, considered as another sizable field. Another exploration well will be drilled in 2025, according to the minimum work commitment. • SK314A : Evaluating for remaining petroleum potential with two exploration wells drilling expected in 2026. • SB412 : Evaluating for remaining petroleum potential to plan for exploration well drilling following the minimum work commitment. • SK325 : Evaluating for remaining petroleum potential to plan for the committed exploration wells which is expected to be drilled in 2026. 5 Myanmar - Yadana OP Production PTTEPI MOGE 62.9630% 37.0370% 381 - • Normal operations 6 Myanmar - Zawtika : M9 & a part of M11 OP Production PTTEP MOGE 80% 20% 305 - • Continue Phase 1E wellhead platforms construction to maintain production level 39 E&P Projects Detail – SEA

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