1 JSP 016/2563 (OOP) Date: 22 April 2020 Re: Notification of the connected transaction-renew from connected person (Add) Attn: The President The Stock Exchange of Thailand The Board of Director’s

financial statement of the Company and its subsidiaries as at March 31, 2020 4 Note : 1 and 2 The company inform the Stock Exchange of Thailand on 22 April 2020. No. Contract No. Borrower Lender Appro ved

Company has assessed the impact from such delay in project completion. In relation to this project, there were unbilled contract revenue amounting to Baht 57 million, which the collectability are directly

of lease contract between IMP and the Office of the Privy Purse, Bureau of the Royal Household and/or Bejaratana-Suvadhana Foundation both in terms of expenses and building usage. Other risks

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

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

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

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

ที่ กตพ Ref. DBP. 108 / 2019 August 13, 2019 Subject : Clarification on Operating Results for the 2nd quarter and 6-month Period ending June 30, 2019 To : President The Stock Exchange of Thailand

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