Director of Subsidiaries as of December 31, 2021 1. IRPC Oil Co., Ltd. Name Position (s) 1. Mr. Chawalit Tippawanich Chairman 2. Mrs. Nidcha Jirametthanakij Member 3. Miss Wanida Utaisomnapa Member 4. Mr. Woravuth Sivapetranart Member 5. Mr. Somkiat Lertritpuwadol Acting Managing Director 5. Rakpasak Co., Ltd. Name Position (s) 1. Mr. Somboon Sadsin Chairman 2. Mr. Surachai Toaphicharttrakul Member 3. Mr. Chokchai Olansirikul Member 4. Mr. Panutat Kiatananchai Managing Director 2. IRPC Polyol Co., Ltd. Name Position (s) 1. Mr. Chawalit Tippawanich Chairman 2. Mrs. Nidcha Jirametthanakij Member 3. Mr. Woravuth Sivapetranart Member 4. Miss Wanida Utaisomnapa Member 5. Mr. Sergiusz Stefanowski Member 6. Mr. Rafal Zdon Member 7. Mr. Waldermar Franz Preussner Member 8. Ms. Soh Bee Hong Managing Director 4. IRPC A&L Co., Ltd. Name Position (s) 1. Mr. Chawalit Tippawanich Chairman 2. Mrs. Nidcha Jirametthanakij Member 3. Miss Wanida Utaisomnapa Member 4. Mr. Woravuth Sivapetranart Member 5. Mr. Payom Boonyoung Member 6. Mr. Soji Sakamoto Member 7. Mr. Hideyuki Tokimasa Member 8. Mr. Dai Yamashita Member 9. Mr. Takayuki Mano Member 10. Mr. Somkiat Lertritpuwadol Acting Managing Director 3. IRPC Technology Co., Ltd. Name Position (s) 1. Mr. Chawalit Tippawanich Chairman 2. Mr. Somkiat Lertritpuwadol Member 3. Miss Arisara Suthasut Member 4. Mr. Surachai Toaphicharttrakul Member 5. Mrs. Suchinda Ploymontree Member 6. Mr. Phothiwat Paopongchuang Managing Director 6. iPolymer Co., Ltd. Name Position (s) 1. Mr. Chawalit Tippawanich Chairman 2. Mr. Somkiat Lertritpuwadol Member 3. Mrs. Nidcha Jirametthanakij Member 4. Mr. Hu Jiezhang Member 5. Ms. Liu Yuhong Member 244 IRPC PUBLIC COMPANY LIMITED 56-1 ONE REPORT 2021
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