Transaction on Acquisition of Assets and Determination of the 2020 Annual General Meeting of Shareholders To: Director and Manager The Stock Exchange of Thailand Enclosure 1. Information Memorandum on the

: The President The Stock Exchange of Thailand The Extraordinary Board of Directors’ meeting of Bangkok Airways Public Company Limited, (“Company” or “BA”) No. 1/2019 held on March 19, 2019 and the Board

Energy Recovery Unit from Thai Oil Public Company Limited and entry into the relevant agreements (Edited) Attention: President Stock Exchange of Thailand Enclosure: Information Memorandum on Asset

Research International (Thailand) Ltd. and Marketeer magazine, for the fourth consecutive year. 15 4. Operating Performance and Financial Position Analysis 4.1 Operating Performance KBank’s consolidated net

December 2019 To : The President The Stock Exchange of Thailand Bangkok Chain Hospital Public Company Limited (the “Company”) would like to report the operating results for year ended 31 December 2019 which

February 26, 2018 To: The President The Stock Exchange of Thailand Re: 2017 operating results We, Delta Electronics (Thailand) Public Company Ltd, would like to notify the Company’s 2017 operating

Limited. The Company has already registered the changes to the Department of Business Development, Ministry of Commerce on April 17, 2019. In this regard, the Company still uses the same stock symbol “RATCH

Q3/17 Q4/17 Q1/18 Q2/18 Q3/18 Sales Revenue Net Profit Unit: Million Baht Page 2 3. Results of Operations and Profitability Consolidated (Unit: Million Baht) Q3/2018 Q3/2017 %YoY 9M/2018 9M/2017 %YoY

2020 To : The President The Stock Exchange of Thailand Bangkok Chain Hospital Public Company Limited (the “Company”) would like to report the operating results for the first quarter ended 31 March 2020

June 2020 To : The President The Stock Exchange of Thailand Bangkok Chain Hospital Public Company Limited (the “Company”) would like to report the operating results for the second quarter ended 30 June