28 April 2020 At: ACC/HO 011/63 Re: Management Discussion and Analysis for the Quarter of 1/2020 To: President The Stock Exchange of Thailand Following the Coronavirus 2019 (COVID-19) pandemic and

prescribed in the Notification of Securities and Exchange Commission concerning the Principles for Undertaking Securities and Derivatives Businesses . In order to adhere to the principles, the intermediary

the shareholding in subsidiary companies To: President The Stock Exchange of Thailand Attachment: Structure of the shareholding in subsidiary companies Filter Vision Public Company Limited (“the Company

2017 To : Directors and Manager The Stock Exchange of Thailand According to the resolution of the meeting of the Board of Directors No.8/2017 of Wattanapat Hospital Trang Public Company Limited (“the

deemed to have the permission to use back office service from the Office, if the service providers are as follows; (1) The Stock Exchange of Thailand; (2) Limited company or Limited public company

broker shall be deemed to have the permission to use back office service from the Office, if the service providers are as follows; (1) The Stock Exchange of Thailand; (2) Limited company or Limited public

follows; (1) The Stock Exchange of Thailand; (2) Limited company or Limited public company established by the Stock Exchange of Thailand and holds shares not less than seventy five percent of total sold

of the shareholders or [iii] any other proceeding in order to perform in accordance with law on capital market, which have to be provided the asset appraisal for support. “law on capital market” means

Stock Exchange of Thailand Reference is made to the fact that BCP Innovation Pte. Ltd. (“BCPI”), which is the subsidiary of Bangchak Corporation Public Company Limited (“Company”), had signed an

1 No. CC20190504ELE May 14, 2019 Subject Report of the Resolutions of Board of Directors’ Meeting No.2/2019 To President The Stock Exchange of Thailand The Board of Directors’ meeting of Cal-Comp