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

Translation CEN 022-2017 August 11, 2017 Subject Management Discussion and Analysis for business operation of quarter 2/2017 To The Manager and President The Stock Exchange of Thailand For 3 months

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

วันที่ 14 สิงหาคม 2550 DEMCO Public Company Limited No. Demco AC002/2019 May 14, 2019 Subject : The company’s operating result for the 1st quarter of year 2019 To : The president, The Stock Exchange

วันที่ 14 สิงหาคม 2550 DEMCO Public Company Limited No. Demco AC003/2019 August 14, 2019 Subject : The company’s operating result for the 2nd quarter of year 2019 To : The president, The Stock

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

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

วันที่ 14 สิงหาคม 2550 DEMCO Public Company Limited No. Demco AC004/2019 November 13, 2019 Subject : The company’s operating result for the 3rd quarter of year 2019 To : The president, The Stock