each operating segments for the year ended 31 December 2019 of the Company and its subsidiaries had changed from the previous period of last year as follows (1) Revenue from sales of program rights

(2) Calculated based on total revenue from sales and service per total operating days of the same branch In the 3rd quarter of 2018 and 2019, the Group’s other income increased from THB 5.7 Mn to THB

-1- AIT (VP-SEC) 026E/2020 August 10, 2020 Subject: Management's Discussion and Analysis of Operating Results for Q2-2020 To: The President of The Stock Exchange of Thailand Summary of Operations Q2

-1- AIT (VP-SEC) 016E/2021 August 10, 2021 Subject: Management's Discussion and Analysis of Operating Results for Q2-2021 To: The President of the Stock Exchange of Thailand Summary of Operations Q2

-1- AIT (VP-SEC) 035E/2023 November 7, 2023 Subject: Management's Discussion and Analysis of Operating Results for Q3-2023 To: The President of the Stock Exchange of Thailand Summary of Operations Q3

/2020 Operating Results Overall operating results of the Company and its subsidiaries (unit: THB million) Q3/19 Q2/20 Q3/20 change +/(-) 9M/19 9M/20 Change +/(-) YoYYoY QoQ Operating revenue 19,227 18,138

-2841-5925 Website: www.kiatnakin.co.th http://www.kiatnakin.co.th/ 2 Management Discussion and Analysis (MD&A) For the first quarter ended March 31, 2018 comparing operating performance and financial

Website: www.kiatnakin.co.th http://www.kiatnakin.co.th/ 2 Management Discussion and Analysis (MD&A) For the first quarter ended March 31, 2018 comparing operating performance and financial position for the

to 1) consolidated operating loss of Baht 273 million during the year; 2) the recorded transaction of treasury shares from shareholders’ equity for financial management of 4 million shares during Q1

operating results for the 3-month period and 6-month period ending June 30, 2017 To : President The Stock Exchange of Thailand Diamond Building Products Public Company Limited and its Subsidiary (together