Rules, Conditions and Procedures for Filing of Annual Financial Statements and Preparation of Reports of the Stock Exchange of Thailand

Offering for Sale of Certificates Representing Interest from Underlying Securities by the Subsidiary of the Stock Exchange of Thailand

resolution of the Board of Directors with respect to the Transaction and the progress of the Transaction to the investors and the Stock Exchange today. Please be informed accordingly, Yours faithfully, -Signed

- ร่าง - 1 Feb 12, 2019 Subject Management Discussion and Analysis for the periods of three months and nine months ended 31st December 2018 To President of the Stock Exchange of Thailand Secretary of

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

- ร่าง - 1 Nov 7, 2017 Subject Management Discussion and Analysis for the period of three months and the period of 1st half ended 30th September 2017 To President of the Stock Exchange of Thailand

- ร่าง - 1 Feb 13, 2018 Subject Management Discussion and Analysis for the period of three months and the period of nine months ended 31st December 2017 To President of the Stock Exchange of Thailand

Ref. DBP. 025 / 2018 February 21, 2018 Subject : Clarification on operating results of Year 2017 To : President The Stock Exchange of Thailand Diamond Building Products Public Company Limited and its

(Translation) February 27, 2019 Ref: SET-2019-003 Re: Management's Discussion and Analysis and operating results for the Year 2018 Attn. to: President The Stock Exchange of Thailand Filter Vision

ที่ กตพ Ref. DBP. 073 / 2019 May 13, 2019 Subject : Clarification on Operating Results for the 1st quarter ending March 31, 2019 To : President The Stock Exchange of Thailand Diamond Building