Bangchak Corporation Plc. Management Discussion & Analysis of Business Operation For the first quarter ended March 31st, 2019 Management Discussion and Analysis of Business Operation for Q1/2019

-months period ending 31 March 2019 To The President The Stock Exchange of Thailand We, ZEN Corporation Group Public Company Limited (“the Group”), are pleased to provide you our management discussion and

Management Discussion & Analysis of Business Operation Bangchak Corporation Public Company Limited For the 2nd quarter ended June 30th, 2018 Management Discussion and Analysis of Business Operation

-Translation- Ref. No. PorBor.027 / 2019 September 11, 2019 Subject: Entering into Transaction of Disposing of Subsidiary’s ordinary shares To: President The Stock Exchange of Thailand Enclosure

Exchange of Thailand (Revised) No. DCORP 017/2561 dated 16 February 2018 (the “Clarification Letter”) Demeter Corporation Public Company Limited (the “Company”) would like to inform that the Meeting of the

Exchange of Thailand (Revised) No. DCORP 017/2018 dated 16 February 2018 (the “Clarification Letter”) Demeter Corporation Public Company Limited (the “Company”) would like to inform that the Meeting of the

President The Stock Exchange of Thailand PACE Development Corporation Public Company Limited (“the Company”) would like to report the operating results for the third quarter of the year 2018 ended 30

Central Retail Corporation Public Company Limited Management discussion and analysis /Page 1 Management Discussion and Analysis The Thai economy is expected to gradually recover in line with COVID-19

Management Discussion & Analysis of Business Operation Bangchak Corporation Public Company Limited For the 3rd quarter ended September 30th, 2018 Management Discussion and Analysis of Business

is cancel this report. 246007822012-1 OTO SAMART CORPORATION PUBLIC COMPANY LIMITED Disposition Stock 68.4285 68.4285 0 09/12/2020 69.2208 69.1785 0.0423   246007852012-1 OTO THE SAMART ENGINEERING