November 11, 2019 SET-19-AC-004 Dear The President The Stock Exchange of Thailand Subject : Clarification of Result’s Operation for the nine months ended September 30, 2019 According to the

-4560 348 Soi Ladprao 94 (Punjamitr), Phlapphla, Wangthonglang, Bangkok, Thailand Tel: (662)-934-4364 Fax: (662)-934-4560 SET 003/2020 13 May 2020 Subject Management Discussion and Analysis for the first

- No. LMJG/SET/2020/019 August 10th, 2020 Subject: Clarification for the change of Operating Results more than 20% Attention: The President The Stock Exchange of Thailand Effects of the COVID-19

August 13 ,2020 Dear Director and The Manager of SET Re: Clarification on the Operating Result of Quarter 2/2020 Thailand economy’s condition of the quarter 2/2563 had a tendency to severely shrink

Provincial Waterworks Authority Attention: Directors and Managers The Stock Exchange of Thailand CC: Secretary-General of the Office of the Securities and Exchange Commission, Thailand Attachment: Map of the

No No. CC20200505ELE May 12, 2020 Re: Clarification of the changes in operation performance for the first quarter ended 31 March 2020 Attn: The President The Stock Exchange of Thailand Cal-Comp

available at www.sec.or.th/hearing. Stakeholders and interested parties are welcome to submit https://www.sec.or.th/EN/Pages/News_Detail.aspx?SECID=6263 Civil Action Dated 06/06/2018 the common stock of

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