Ref. No. 132 /2560 10 August 2017 SUBJECT : 2Q/2017 reviewed financial statements and related comments. ATTN : The President Stock Exchange of Thailand Attachment : The reviewed financial statements

Translation November 10, 2017 Subject: Management explanation and analysis for Quarter ended 30 September 2017 Attn: The Managing Director, the Stock Exchange of Thailand Pacific Pipe Public Company

จดหมายชี้แจงq360e November 14, 2017 The Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis for three month Ending 30 September 2017 Summary on third Quarter

November 14, 2017 SET-17-AC-004 Dear The President The Stock Exchange of Thailand Subject: Clarification of Result’s Operation for three months periods ended 30 September 2017 According to the

Manager of The Stock Exchange of Thailand Union Petrochemical Public Company Limited and its subsidiaries ("the Company") would like to clarify the operating results for the year 2018 ended December 31

Quarter 1/2019 To : Director and Manager of The Stock Exchange of Thailand Union Petrochemical Public Company Limited and its subsidiaries ("the Company") would like to clarify the operating results for the

AC 52/07-003 ACC1/19-042 August 13, 2019 Subject: Management Discussion and Analysis Quarter 2 Ending June 30, 2019 To: Director and Managing Director The Stock Exchange of Thailand Qualitech Public

จดหมายชี้แจงq262e August 14, 2019 The Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis for three month Ending 30 June 2019 Summary on Second Quarter

Manager of The Stock Exchange of Thailand Union Petrochemical Public Company Limited and its subsidiaries would like to describe and analyze the financial situation and business operation for Quarter 1/2018

จดหมายชี้แจงq261e August 14, 2018 The Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis for three month Ending 30 June 2018 Summary on Second Quarter