No. WHAUP-CS014-2562 1 8 August 2019 Re Share Acquisition in Duong River Surface Water Plant JSC in Vietnam Dear President The Stock Exchange of Thailand WHA Utilities and Power Public Company

Exchange or the securities trading center with the approval of the Office, as the case may be; (2) short sale of securities which are debt instruments, whereby the Office also has the power to issue

power to issue Notifications prescribing addition rules on such matter for the securities companies; or (3) short sale as a consequence of duties arising from obligations under categories or

2017 Bangchak Corporation Plc. Table of Contents 7 9 09 8 Refinery Business 13 Marketing Business 14 Green Power Business 16 Bio-Based Products Business 18 Exploration & Production Business 22 26 24

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