Subsidiaries Business type Shareholding (Percentage) IRPC Technology Company Limited Vocational school 99.99% Joint Venture Vajira Lab for Society Company Limited (Other co-investor: Navamindradhiraj University 50%) Laboratory testing and certification services for medical devices 50.00% WHA Industrial Estate Rayong Company Limited (Other joint venture partners: WHA Industrial Development Public Company Limited, 60%) Industrial estate development 40.00% Associate Company IRPC Clean Power Company Limited (Other joint venture partners: Global Power Synergy Public Company Limited 51%) Production and distribution of electricity and steam 48.99% VISUP Company Limited (Other joint venture partners: Vidyasirimedhi Institute 33.33%, PTT PCL. 22.22%, Top Ventures Co., Ltd. 11.11%, Beacon Venture Capital Co., Ltd. 11.11%) Investment in other businesses 22.22% Other investments Guangzhou Saiju Performance Polymer Ltd. Distribution of polymers and chemicals through E-commerce in China 15.00% Sarn Palung Social Enterprise Company Limited Support execution of social enterprises 15.00% Rayong Acetylene Company Limited Production and distribution of acetylene gas 13.04% Other Businesses Note: On December 19, 2023, the Board of Directors meeting resolved to approve the dissolution of iPolymer Company Limited and on January 9, 2024, the Extraordinary General Meeting of iPolymer’s shareholders resolved to approve the dissolution of business. The registration for dissolution of business is expected by June 2024. 94 Structure and Business Operations of IRPC IRPC Public Company Limited
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