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-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

No. ADD 22/2023 9 November 2023 Subject: Management discussion and analysis for the performance for the nine-month period ended 30 September 2023 To: President The Stock Exchange of Thailand AddTech

Ref. DBP. 024 / 2020 February 25, 2020 Subject : Clarification on Operating Results of Year 2019 To : President The Stock Exchange of Thailand Diamond Building Products Public Company Limited and its

.  Foreign Exchange Regulations The Bank of Thailand issued Notice of the Competent Officer on Rules and Practices regarding the Undertaking of Authorized Money Changers (No. 6), and Notice of the Competent

1 No. ACC 2019/004 13 August 2019 Subject : Management Discussion and Analysis for the three-month and six-month period ended 30 June 2019 To : President The Stock Exchange of Thailand Index Living

Ref. DBP. 068 / 2018 May 14, 2018 Subject : Clarification on operating results for the 1st Quarter ending March 31, 2018 To : President The Stock Exchange of Thailand Diamond Building Products Public

from sales and rental and rendering of services (5) Adjustment to earnings are Net gain(loss) on foreign exchange, Impairment gain(loss), Gain(loss) on disposal of assets, Gain(loss) on disposal of

Ref. DBP. 066 / 2020 May 11, 2020 Subject : Clarification on Operating Results for the 1st Quarter ending March 31, 2020 To : President The Stock Exchange of Thailand Diamond Building Products Public

/2019 (2nd additional) To Director and Manager The Stock Exchange of Thailand Enclosure 1. Information Memorandum on the Acquisition of Assets (Schedule 1) Regarding the Purchase of the Ordinary Shares of