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. 141 / 2017 November 13, 2017 Subject : Clarification on Operating Results for the 3-Month Period and 9-Month Period ending September 30, 2017 To : President The Stock Exchange of Thailand

amended) and the Notification of the Board of Governors of the Stock Exchange of Thailand Re: Disclosure of Information and Other Acts of Listed Companies Concerning the Acquisition and Disposition of

regarding the Acquisition and Disposition of Assets of the Company (Revised) Attention: President, The Stock Exchange of Thailand According to the resolution of the Board of Director’s Meeting No. 8/2019 of

Ref. No. IVL 005/11/2019 11 November 2019 The President The Stock Exchange of Thailand Subject: Submission of Quarterly Review of Financial Statements and the Management Discussion and Analysis of

Ref. No. IVL 002/05/2020 12 May 2020 The President The Stock Exchange of Thailand Subject: Submission of Quarterly Review of Financial Statements and the Management Discussion and Analysis of

Disposal of Assets Transaction, and Acquisition of Assets Transaction To : Director and Manager The Stock Exchange of Thailand Enclosure 1. Information Memorandum on the Disposal of Komchadluek Business and

.  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

according to the additional paid up in the capital of GPSC’s associates and in increase in plant, property and equipment (PP&E) of subsidiaries in which the power plants are in construction. Moreover, for Q1

Determination of the Date of Extraordinary General Meeting of Shareholders No. 1/2018 To: President The Stock Exchange of Thailand Enclosures: 1. Information Memorandum on the Offering of Newly Issued Ordinary