-1- AIT (VP-SEC) 014E/2023 May 8, 2023 Subject: Management's Discussion and Analysis of Operating Results for Q1-2023 To: The President of the Stock Exchange of Thailand Summary of Operations Q1-2023

10th May, 2018 Subject: Management Discussion and Analysis (MD&A) of the financial as at and for three months’ period ending 31st March, 2018 Attention: President The Stock Exchange of Thailand P.C.S

fund; (10) private fund managed by securities company for investment of investor under (1) to (9) or (11) to (26) or high net worth investor; (11) provident fund; (12) Government Pension Fund; (13

วันที่ 14 สิงหาคม 2550 DEMCO Public Company Limited No. Demco AC001/2019 February 28, 2019 Subject : The company’s operating result of the year 2018 To : The president, The Stock Exchange of Thailand

วันที่ 14 สิงหาคม 2550 DEMCO Public Company Limited No. Demco AC003/2018 MAY 15, 2018 Subject : The company’s operating result of the 1st quarter of year 2018. To : The president, The Stock Exchange

 company’s operating result o   :          The president,                T       The Stock Exchange of Thailand.   Demco Public Company Limited would like to inform you herewith the company result of  the 2nd

2019 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

Management discussion of three-month operating result ending March 31, 2020 To The President of the Stock Exchange of Thailand Matching Maximize Solution Public Company Limited (the Company) would like to

DEMCO 012 operating result Q 1-63 E DEMCO Public Company Limited No. Demco AC002/2020 May 18, 2020 Subject : The company’s operating result for the quarter 1/2020 To : The president, The Stock

Stock Exchange of Thailand With reference to Kang Yong Electric Public Company Limited’s submission of financial statements for quarter 1/2020 (April 2020 – June 2020) duly reviewed by a certified public