2017 Bangchak Corporation Plc. Table of Contents 6 8 08 8 Refinery Business 12 Marketing Business 13 Green Power Business 15 Bio-Based Products Business 18 Exploration & Production Business 21 25 23

recommended to deal with the said insufficiency;   (4) Monitoring (MR): Some audit firms were found having insufficient monitoring and without action plans to monitor deficiency remediation. In this regard

closely monitoring the matter, the SEC has found that at around 08.30 hours on 2 September 2019, a suspicious Facebook account posted deceitful statements that misled the public to believe that such

gathering related documents and evidence for auditor. Considering that financial statements provide investors and shareholders with vital information for making investment decision and monitoring listed

Bangchak Corporation Plc. Table of Contents 5 10 0 10 Refinery Business 14 Marketing Business 16 Green Power Business 18 Bio-Based Products Business 21 Exploration & Production Business 26 31 30 Statement

authorized auditors. Sincerely yours, VAROPAKORN PUBLIC COMPANY LIMITED (Mr. Sahasee Chitanondh) Managing Director CC. Corporate Monitoring Department, The Securities and Exchange Commission

) Managing Director CC. Corporate Monitoring Department, The Securities and Exchange Commission

Chitanondh) Managing Director CC. Corporate Monitoring Department, The Securities and Exchange Commission

PUBLIC COMPANY LIMITED (Mr. Sahasee Chitanondh) Managing DirectorCC. Corporate Monitoring Department, The Securities and Exchange Commission

. Sincerely yours, VAROPAKORN PUBLIC COMPANY LIMITED (Mr. Sahasee Chitanondh) Managing Director CC. Corporate Monitoring Department, The Securities and Exchange Commission