IRPC Annual Report 2023

Outcome of Stakeholder Hearings Key Stake- holders Engagement Approach (Frequency)* Engagement Objective Issue of Interest Action Guidelines Implementing Unit Shareholders/ Investors • Domestic and international roadshows (quarterly online channels) • Analyst meetings (quarterly online channels) • Conference calls (quarterly online channel) • Site visits (annual) • News and Public Relations (Monthly) • Opportunities for investors to ask questions about IRPC • Build confidence in the organization and investment • Access to accurate information • Protect the rights of shareholders that they are entitled to according to the regulations. • Improve competitiveness and follow the business direction in accordance with the new vision • Organizational risk management, both short-term and longterm • Sustainability actions, particularly to achieve Net Zero Target • Actions to increase production capacity and seek new businesses to correspond with current situations • Presentation of enterprise risk management information • Answer investors’ questions regarding sustainability Office of Corporate Affairs/ Investor Relations Employees • Employee engagement survey (annual) • Announcement of news and measures during COVID-19 (weekly or more frequently as needed) • CEO Townhall • Measure and strengthen corporate culture and desirable behaviors • Measure performance of human resource management • Inform about health and safety measures during COVID-19 • Organizational values and desirable behaviors • Employee engagement • Human resource management and development • Improve business competitiveness and follow business direction in accordance with the new vision • IRPC G3 Development Guidelines • Human resource management excellence • Make improvements to correspond with engagement factors • Actions to increase production capacity and seek new businesses to correspond with current situations Human Resources and Organizational Capabilities Customers/ Consumers • Online customer seminar (annual) • Customer satisfaction survey (annual) • Activities to strengthen relationships between customers and the company, such as holiday gifts, sporting events, seminars, thank you parties (annual) • Awareness of customer needs and suggestions • Keep track of updated product information and expectations • Develop a good relationship between customers and the company • Updated product information and IRPC’s expectation • Details of relevant laws and market trends • Product Development Plan • Guidelines for exchanging knowledge, sharing of knowledge in business and ESG • Notify relevant units about customers’ requirements, expectations and concerns and develop relevant action plans • Guidelines for notifying product progress Commerce and Marketing 110 Business-Driven Sustainability IRPC Public Company Limited

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