GC One Report 2023 [EN]

GC hosted a talk for the Board of Directors on the topic of Decarbonization Roadmap & 5Y Plan GC, led by GC’s senior executives to keep the Directors informed of GC’s decarbonization guidelines and targets according to its Decarbonization Pathways for use in supplementing the formulation of GC’s strategic plans for sustainability. Training for Executives and Company Secretary GC consistently encourages its Executives and the Company Secretary to pursue further education and participate in training programs to acquire knowledge beneficial to their duties as well as their roles in supporting GC and the Board of Directors, as detailed below. GC conducted training programs for Executives from the Senior Vice President level upward and Executives serving as Directors and Executive Directors of companies under GC Group. The topics are as follows: Topic 1: Financial Statements for Directors by EY Corporate Advisory Services Co. Ltd. The objective was to foster an understanding of accounting principles, enable the participants to read and understand financial statements as well as raise questions and provide more beneficial insights to the Board of Directors regarding the accounting reports in the financial statements, and identify potential risk issues based on analysis in the financial statements in accordance with their fiduciary duties in safeguarding the interests of GC and its shareholders. Topic 2: Risk Management for Directors by EY Corporate Advisory Services Co. Ltd. The objective was to foster an understanding of the principles of risk management and the analysis of key issues from the perspective of the Board of Directors as well as a good risk management framework and appropriate methods for overseeing each type of risk so that the participants could apply them in supervising GC’s risk management alongside business management. In addition to the aforementioned training programs, GC has developed training programs for Executives at all levels. Further details appear under “Employees.” GC encouraged the Company Secretary to attend training programs to support the Board of Directors. In 2023, the Company Secretary attended programs offered by the Thai Institute of Directors Association (IOD), namely the Anti-Corruption Practical Guide (ACPG), Class 64/2023 and the Board Nomination & Compensation Program (BNCP), Class 16/2023; and other in-house programs, namely Financial Statements for Directors and Risk Management for Directors, hosted by EY Corporate Advisory Services Co. Ltd. Board Performance Assessment Board of Directors GC has prescribed annual board performance assessments, conducted through an online system to allow the Board of Directors to participate in the review of their annual performance and obtain guidelines for auditing their performance according to good corporate governance principles. Three assessment forms are utilized: group assessment, self-assessment, and cross-assessment (individual assessment of other directors). The Board of Directors may engage external consultants to establish guidelines and provide suggestions on board performance assessment every three years to ensure compliance with CG Code and the Dow Jones Sustainability Index (DJSI) criteria. In 2023, 15 Di rectors underwent performance assessments. A summary of the outcomes is given below. Group Assessment: The group assessment form comprised six main sections: 1) Board policy, 2) Board performance, 3) Board structure (composition and qualifications), 4) Board style, 5) Board meeting, and 6) Board development. The average group assessment score was 99.1%. 186

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