Executives under the Organizational Structure as of February 16, 2024 Name Position 1. Mr. Kongkrapan Intarajang Chief Executive Officer and President 2. Mr. Toasaporn Boonyapipat Chief Operating Officer - Base and Intermediate Chemicals 3. Mr. Saroj Putthammawong Chief Operating Officer - Value Added Products Acting Senior Vice President - Marketing and Sales - Industry Platforms 4. Mr. Narongsak Jivakanun Chief Operating Officer - International Business 5. Mr. Pirun Krimwongrut Chief Operating Officer - Center of Excellence 6. Miss Pattaralada Sa-ngasang Executive Vice President - Finance and Accounting 7. Mr. Chaya Chandavasu Executive Vice President - Sustainability 8. Mr. Anutin Chuaypen Executive Vice President - Organizational Effectiveness 9. Mrs. Chananchida Wiboonkanarak Executive Vice President - Corporate Strategy 10. Mr. Siridech Kumvongdee Executive Vice President - Marketing, Commercial and Supply Chain 11. Mrs. Jeeranee Pimthanothai Executive Vice President - Technical, Engineering and Maintenance 12. Mr. Pukpong Wungrattanasopon Executive Vice President - Olefins 13. Mr. Pornsak Mongkoltrirat Executive Vice President - Polymers 14. Mr. Kamel Ramdani Executive Vice President - Product Innovation Acting Senior Vice President - Innovation Growth Platforms and CVC 15. Mrs. Pilasphan Udomjarumanee Senior Vice President - Corporate Governance and Legal 16. Mr. Chatchawalit Dhammasaroj Senior Vice President - Internal Audit 17. Mr. Sakesiri Piyavej Senior Vice President - Quality, Safety, Occupational Health and Environment 18. Mrs. Chatsuda Kanjanarat Senior Vice President - Transformation Excellence 19. Mr. Rachean Chanthaweekul Senior Vice President - Procurement 20. Mr. Krit Kumpabooth Senior Vice President - CAPEX Excellence 21. Mr. Paisarn Sarapee Senior Vice President - EO and Derivatives 22. Mr. Sawat Trongdilokrat Senior Vice President - Phenol and Derivatives 23. Mr. Ratchada Sawasdirak Senior Vice President - Refinery 24. Mr. Sombat Silsangwon Senior Vice President - Aromatics 25. Mr. Panchoak Auetanapa Senior Vice President - Utilities 26. Mr. Thitipol Artsanchorn Senior Vice President - Marketing and Sales - General Applications 27. Miss Kornkamol Korpaisarn Senior Vice President - Strategy, Business Development and Commercial Excellence 28. Mr. Panod Awaiwanond Senior Vice President - US Second Home 29. Miss Wanlapa Sophiskhuankhant Senior Vice President - International Finance and Strategy Acting Senior Vice President - Specialty Business Remark: Executives in numbers 1-6 are executives as per SEC’s Notification Re: Determination of Definitions in Notifications relating to Issuance and Offer for Sale of Securities. 162
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