. Lalana Tharasuk Acquisition Stock 4.9968 0.0283 5.0251 15/06/2021 4.9968 0.0283 5.0251   246011542106-1 JTS Miss Promsiri Sahaboontham Acquisition Stock 4.9929 0.0326 5.0256 21/04/2021 4.9929 0.0326 5.0256

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

Ref. DBP. 153 / 2019 November 11, 2019 Subject : Clarification on Operating Results for the 3rd quarter and 9-month Period ending September 30, 2019 To : President The Stock Exchange of Thailand

Ref. DBP. 111 / 2020 August 10, 2020 Subject : Clarification on Operating Results for the 2nd quarter and 6-month period ending June 30, 2020 To : President The Stock Exchange of Thailand Diamond

securities business in the category of securities brokerage, shall apply only to the securities brokerage outside the Stock Exchange of Thailand. Clause 3/1.6 For the purpose of supervision the undertaking of

provisions relating to a company licensed to undertake securities business in the category of securities brokerage, shall apply only to the securities brokerage outside the Stock Exchange of Thailand. Clause 3

of securities brokerage, shall apply only to the securities brokerage outside the Stock Exchange of Thailand. Clause 3/1. For the purpose of supervision the undertaking of securities brokerage of

Held Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No TAKUNI Mr. Kanatuch Woointranon Acquisition Stock

Held Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No VARO MA ALUMINUM CORPORATION Acquisition Stock 0

Held Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No MAJOR GIC PRIVATE LIMITED Disposition Stock 5.0311