Microsoft Word - MDA Q219 EN August 14, 2019 To President The Stock Exchange of Thailand Subject Notification on the difference of revenue from sales and net profit YOY by more than 20 percent

for the three-month period ended March 31, 2019 To: Director and Manager of the Stock Exchange of Thailand Referring to the submission of the reviewed financial statements for quarter 1/2019 of Wiik

FS 07/2020 14 May 2020 Subject Report resolution of establishment of a new subsidiary To Director and President The Stock Exchange of Thailand Forth Smart Service Public Company Limited (“the Company

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POST 019/2019 16 December 2019 Subject Notification convening date of the Extraordinary General Meeting of Shareholders No. 1/2020 To The President The Stock Exchange of Thailand 93 Ratchadaphisek

retail investors and prevent inproportionate share allocation to patrons and related persons of the issuing company in such a way that could control the IPO volume on the Stock Exchange of Thailand (SET

1 - TRANSLATION - VS/PC (Q-Con) 004/2018 February 1st , 2018. Attention Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis for year 2017 Quality

1 - TRANSLATION - VS/PC (Q-Con) 032/2017 October 31st, 2017. Attention Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis the third quarter ended 30

1 - TRANSLATION - KT/KP (Q-CON) 007/2018 November 1st , 2018. Attention Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis the third quarter ended 30

1 - TRANSLATION - KT/PB (Q-Con) 001/2020 February 13, 2020. Attention Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis for year 2019 Quality Construction