1 No. CC20180203ELE February 23, 2018 Subject Report of the Resolutions of Board of Directors’ Meeting No.1/2018 To President The Stock Exchange of Thailand The Board of Directors of Cal-Comp

No. ED-MD2020-0008 March 12, 2020 Subject: Announcement of schedule AGM for the year 2020 and omission of dividend for year 2019. Attention: The President,The Stock Exchange of Thailand The Meeting

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

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

Extraordinary General Meeting of the Shareholders No. 1/2561, Plans for listing CAZ (Thailand) Co., Ltd. on the Stock Exchange of Thailand Attention The President The Stock Exchange of Thailand Enclosure

Extraordinary General Meeting of Shareholders No.1/2019 (EGM 1/2019) To: The President of the Stock Exchange of Thailand Attachment: 1. Information Memorandum of the Purchase and Acquisition of Entire Business

-Translation- Ref. No. PorBor.027 / 2019 September 11, 2019 Subject: Entering into Transaction of Disposing of Subsidiary’s ordinary shares To: President The Stock Exchange of Thailand Enclosure

Resources CONTENTS Executive Summary 03 Statement of Income 07 Business Performance 09 Statement of Financial Position 21 Statement of Cash Flows 23 Financial Ratios 24 Environment Management Accounting 26 3

Resources CONTENTS Executive Summary and Management Guidelines to Mitigate the Effects of the COVID-19 Outbreak 03 Statement of Income 09 Business Performance 11 Statement of Financial Position 24 Cash of

assets and convening the Extraordinary General Meeting of the Shareholders No. 1/2018 (Revise 3) To : President, The Stock Exchange of Thailand Attachment : 1. Capital Increase Report Form (F 53-4) 2