GC One Report 2023 [EN]

Name - Surname : Mrs. Rattana Nakasiri Vice President - Corporate Governance Age : 60 Years Appointed : 15 October 2015 Education : Master of Business Administration, National Institute of Development Administration : Bachelor of Economics, Ramkhamhaeng University Training : PTTGC Group VP: Leadership Development Program (LDP 2) 2015 (by GC) : Business Simulation for VP: CELEMI Decision Base, KNOWLEDGE CO., LTD : Corporate Compliance Overview - Executive, Hunton & Williams : Company Secretary Challenges in Building Trust in the Boardroom Seminar 2022, Subsidiary Governance, Business and Legal Issues for Directors and Executives and Transformative Leadership for Global Enterprise 2022, Director’s Legal Liabilities, Ethical Leadership for New Era and High Performing Board & Board Effectiveness 2021 (In-house Programs by GC), Director Certification Program (DCP) Class 290/2020, Ethical Leadership Program (ELP) Class 15/2019, Risk Management Program for Corporate Leaders (RCL) Class 11/2018, IT Governance and Cyber Resilience Program (ITG) Class 8/2018, Company Reporting Program (CRP) Class 17/2017, Roles of Company Secretaries in Corporate Governance Promotion Seminar, IOD Open House 1/2017, Company Secretary Program (CSP) Class 69/2016, Board Reporting Program (BRP) Class 20/2016, Effective Minute Taking (EMT) Class 35/2016, Anti-Corruption: The Practical Guide (ACPG) Class 29/2016, and Corporate Governance for Executive (CGE) Class 7/2016, Thai Institute of Directors Association (IOD) Board Member / Management in Listed Company – The Stock Exchange of Thailand : 1 : Vice President - Corporate Governance, PTT Global Chemical Public Company Limited Board Member / Management in Non-Listed Company – The Stock Exchange of Thailand : None Position in Other Organizations / Institutions : None Work Experiences (5-year past experiences) 29 Oct 2019 - 1 Oct 2021 Director, GC Estate Company Limited Shareholding : None Relation among Family with Other Directors, Management, Major Shareholders of the Company or Subsidiaries : None 401 PTT GLOBAL CHEMICAL PUBLIC COMPANY LIMITED Form 56-1 One Report 2023

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