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

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

ที่ กตพ Ref. DBP. 107 / 2018 August 14, 2018 Subject : Clarification on Operating Results for the 3-month Period and 6-month Period ending June 30, 2018 To : President The Stock Exchange of Thailand

ที่ กตพ Ref. DBP. 156 / 2018 November 12, 2018 Subject : Clarification on Operating Results for the 3rd quarter and 9-month Period ending September 30, 2018 To : President The Stock Exchange of

transaction including additional announcement and according to the announcement of the Stock Exchange of Thailand regarding the revealing of operating data of registered company in connected transaction B.E

1 Ref: AC.031/2017 15 August 2017 Subject: Management discussion and analysis of financial position and operating results To: President and Manager The Stock Exchange of Thailand Overall operating

1 Ref: AC.042/2017 14 November 2017 Subject: Management discussion and analysis of financial position and operating results To: President and Manager The Stock Exchange of Thailand Overall operating

วันที่ 25 กุมภาพันธ์ 2558 August 14, 2019 Subject: Management’s Explanation and Analysis for the 3 months and 6 months period ended June 30, 2019 Attention: Director and Manager The Stock Exchange of

Exercise ratio (warrant: common stock) 1 : 1 Exercise price (baht per share) 2.10 Term of warrants 3 years Exercise period Quarterly First exercise date 30 September 2020 Last exercise date 27 August 2021

วันที่ 25 กุมภาพันธ์ 2558 November 14, 2019 Subject: Management’s Explanation and Analysis for the 3 months and 9 months period ended September 30, 2019 Attention: Director and Manager The Stock