Indorama Ventures Public Company Limited 75/102 Ocean Tower 2, 37th Floor, Sukhumvit 19 (Wattana), Asoke Road, Klongtoey Nuer, Wattana, Bangkok 10110, Thailand Tel : +66(0)2 661 6661 Fax : +66(0)2

YONG THAI PUBLIC COMPANY LIMITED 633/14 Sathupradit Road, Yannawa, Bangkok 10120 Thailand Tel. (662) 2943364-8, Fax : (662) 2943373 YTC 19/2018 November 14, 2018 To : The President The Stock Exchange

Indorama Ventures Public Company Limited 75/102 Ocean Tower 2, 37th Floor, Sukhumvit 19 (Wattana), Asoke Road, Klongtoey Nuer, Wattana, Bangkok 10110, Thailand Tel : +66(0)2 661 6661 Fax : +66(0)2

INDORAMA VENTURES PUBLIC COMPANY LIMITED 75/102 Ocean Tower 2, 37th Floor, Asoke Road, Klongtoey Nuer, Wattana, Bangkok 10110, Thailand Tel. 02-661-6661 Fax. 02-661-6664 www.indoramaventures.com

e-service Online Submission No Data Contact The Securities and Exchange Commission, Thailand 333/3 Vibhavadi-Rangsit Road, Chomphon, Chatuchak Bangkok 10900, Thailand SEC Help Center 1207 Tel : +66

e-service Online Submission No Data Contact The Securities and Exchange Commission, Thailand 333/3 Vibhavadi-Rangsit Road, Chomphon, Chatuchak Bangkok 10900, Thailand SEC Help Center 1207 Tel : +66

e-service Online Submission No Data Contact The Securities and Exchange Commission, Thailand 333/3 Vibhavadi-Rangsit Road, Chomphon, Chatuchak Bangkok 10900, Thailand SEC Help Center 1207 Tel : +66

Indorama Ventures Public Company Limited 75/102 Ocean Tower 2, 37th Floor, Sukhumvit 19 (Wattana), Asoke Road, Klongtoey Nuer, Wattana, Bangkok 10110, Thailand Tel : +66(0)2 661 6661 Fax : +66(0)2

แบบฟอร์มหัวจดหมายของธนาคาร(ภาษาอังกฤษ) Bangkok Bank Public Company Limited Registration No. 0107536000374 333 Silom Road Bangrak Bangkok 10500 Thailand Tel. (66) 2230-1919 Fax (66) 2231-4890

Indorama Ventures Public Company Limited 75/102 Ocean Tower 2, 37th Floor, Sukhumvit 19 (Wattana), Asoke Road, Klongtoey Nuer, Wattana, Bangkok 10110, Thailand Tel : +66(0)2 661 6661 Fax : +66(0)2