Business Operation For the second quarter ended 30th June, 2017 http://www.google.co.th/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjD7_TkjpnTAhUWTo8KHY7JB7MQjRwIBw&url=http

company and its subsidiaries’ operating result for the 1st quarter ended 31st March 2020 Unit: THB Million Q1/2020 Q4/2019 QoQ Q1/2019 YoY Total Revenue 43,070 50,146 -14% 45,535 -5% Accounting EBITDA

-517-0109-14 Fax 66-2-5170529 February 27, 2017 Subject Management Discussion and Analysis for the year ended December 31, 2016 To Managing Director of Stock Exchange of Thailand Table of Financial Ratio

Management Discussion and Analysis for the Year 2019 1. Operating Results (Company and Subsidiaries) Consolidated revenue for year ended 2019 of both treatment of industrial waste business division

dated August 3, 2019 approved the Company’s Interim Financial Information ending June 30, 2019. The Company would like to clarify the six-month period ended June 30, 2019 earnings results, as follows

Management Discussion & Analysis of Business Operation Bangchak Corporation Public Company Limited For the year ended December 31st, 2018 Management Discussion and Analysis of Business Operation for

- Translation - MPIC 007/2019 February 13, 2019 Subject: Submit the Year End Financial Statement ended December 31, 2019 and clarification for the change of operating result more than 20% Attention

- Translation - MPIC 002/2020 February 17, 2020 Subject: Submit the Year End Financial Statement ended December 31, 2019 and clarification for the change of operating result more than 20% Attention

(Auto 11 Lines) Fax: +66(0)2-192-3744 Page 1 of 1 -Translation- No. ED-MD18-004 26th February 2018 Subject : Clarification of changes in excess of 20% in the operating results for year ended 2017 To

(Translation) LEE 08/2019 9 August 2019 Subject : Management Discussion and Analysis for the second quarter ended June 30, 2019 To : President of The Stock Exchange of Thailand We submit herewith the