Page 1 of 3 May 10, 2019 Re: Management Discussion and Analysis for Quarter 1/2019 (March 31 ,2019) To: Director and Manager of the Stock Exchange of Thailand Patkol Public Company Limited and its

previous Quarterly To: The President The Stock Exchange of Thailand As a result of the global economic slowdown, trade and economic negotiations and in Thailand have continued to slow down to wait for

1 27 May 2019 Subject: Explanation of operating result in the financial statement ended 31 March 2019 To: President of the Stock Exchange of Thailand With reference to the financial statement of FY

1 8 August 2019 Subject: Explanation of operating result in the financial statement ended 30 June 2019 To: President The Stock exchange of Thailand With reference to the financial statement of Q1

previous Quarterly To: The President The Stock Exchange of Thailand As a result of the trade war, both the United States and China have pulled the world economy down sharply and may cause a recession in the

August 8, 2019 SET-19-AC-003 Dear The President The Stock Exchange of Thailand Subject: Clarification of Result’s Operation for the six months ended June 30, 2019 According to the resolution of BKD’s

Page 1 of 2 August 9, 2019 Re: Management Discussion and Analysis for Quarter 2/2019 (June 30 ,2019) To: Director and Manager of the Stock Exchange of Thailand Patkol Public Company Limited and its

August 14, 2019 Subject : Management Discussion and Analysis for Six-month and 2nd quarter ended June 30, 2019 Attention : President The Stock Exchange of Thailand 1. Operating Performance 1.1

หนังสือแสดงการรับทราบความผิด 11 May 2018 Subject : Management Discussion and Analysis of the first quarter 2018 ended 31 March 2018 Attn. : Director and Manager The Stock Exchange of Thailand Encls

: BC.017/2018 May 11, 2018 Subject Interim Management’s Discussion and Analysis for the three months ended March 31, 2018 To The President The Stock Exchange of Thailand Management Discussion and