26 February 2019 Subject: Management Discussion and Analysis for the Year Ended December 31, 2018 To: Directors and Managers The Stock Exchange of Thailand Halcyon Technology Public Company Limited

15 November 2017 Subject: Management Discussion and Analysis for the 9-Month Period Ended September 30, 2017 To: Directors and Managers The Stock Exchange of Thailand Halcyon Technology Public

26 February 2018 Subject: Management Discussion and Analysis for the Year Ended December 31, 2017 To: Directors and Managers The Stock Exchange of Thailand Halcyon Technology Public Company Limited

15 May 2019 Subject: Management Discussion and Analysis for the 3-Month Period Ended March 31, 2019 To: Directors and Managers The Stock Exchange of Thailand Halcyon Technology Public Company Limited

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

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

26 October 2018 To: The President The Stock Exchange of Thailand Re: Q3-2018 operating results We, Delta Electronics (Thailand) Public Company Ltd, would like to notify the Company’s Q3-2018 (Jul-Sep

No. INGRS059 14 September 2020 Subject : Management Discussion & Analysis (MD&A) for the consolidated financial statements of the 2nd quarter ended 31 July 2020 To : The President The Stock Exchange

No. INGRS066 30 March 2021 Subject : Management Discussion & Analysis (MD&A) for the consolidated financial statements for the financial year ended 31 January 2021 To : The President The Stock

27 April 2020 To: The President The Stock Exchange of Thailand Re: Q1-2020 Operating Results We, Delta Electronics (Thailand) Public Company Limited (the “Company”) would like to notify the Company’s