No. CC20190804ELE August 13, 2019 Re: Clarification of the changes in operation performance for the second quarter and the first half ended 30 June, 2019 Attn: The President The Stock Exchange of

15 May 2018 Subject: Management Discussion and Analysis for the 3-Month Period Ended March 31, 2018 To: Directors and Managers The Stock Exchange of Thailand Halcyon Technology Public Company Limited

24 July 2018 To: The President The Stock Exchange of Thailand Re: Q2-2018 operating results We, Delta Electronics (Thailand) Public Company Ltd, would like to notify the Company’s Q2-2018 (Apr-Jun

14 August 2018 Subject: Management Discussion and Analysis for the Six-Month Period Ended June 30, 2018 To: Directors and Managers The Stock Exchange of Thailand Halcyon Technology Public Company

No. CC20181103ELE November 12, 2018 Re: Clarification of the changes in operation performance for the third quarter and the nine- month period ended 30 September 2018 Attn: The President The Stock

exceed 20% To : The President The Stock Exchange of Thailand Bangkok Chain Hospital Public Company Limited (the “Company”) would like to report the operating results of the Company and its subsidiaries for

14 November 2018 Subject: Management Discussion and Analysis for the Nine-Month Period Ended September 30, 2018 To: Directors and Managers The Stock Exchange of Thailand Halcyon Technology Public

Ref. 66/2018 November 27, 2018 Subject : Waiver of rights to purchase ordinary shares of Dhipaya Bodin Co., Ltd. To : Director and Manager The Stock Exchange of Thailand The Board of Directors

exceed 20% (Revised) To : The President The Stock Exchange of Thailand Bangkok Chain Hospital Public Company Limited (the “Company”) would like to report the operating results of the Company and its

IDH-AC-000-อส6302/30.00 20 February 2020 Re: Management Discussion and Analysis Operating results for the year ended 31 December 2019 To: President The Stock Exchange of Thailand Overview of the