result of the adjustment of the provision for obsolete and slow-moving 4 inventory in the first quarter of 2019 in order to better classify product inventory shelf life, depreciation, and obsolescence, the

ที่ กตพ Ref. DBP. 030 / 2019 February 20, 2019 Subject : Clarification on Operating Results of Year 2018 To : President The Stock Exchange of Thailand Diamond Building Products Public Company Limited

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

Products Public Company Limited and its Subsidiary (together referred to as “Corporate Group”) would like to clarify on the operating results according to the consolidated financial statements for the 1st

Company Limited and its Subsidiary (together referred to as “Corporate Group”) would like to clarify on the operating results according to the consolidated financial statements for the 1st quarter ending

Diamond Building Products Public Company Limited and its Subsidiary (together referred to as “Corporate Group”) would like to clarify on the operating results according to the consolidated financial

Thailand Diamond Building Products Public Company Limited and its Subsidiary (together referred to as “Corporate Group”) would like to clarify on the operating results according to the consolidated financial

proportion of 51 percent 2. Capital Increase Form (F53-4) 3. Information Memorandum regarding the offer of newly issued shares by capital increase of East Coast Public Company Limited to the specific person

PowerPoint Presentation Management’s Discussion and Analysis (MD&A) For the Financial Result for the Fiscal Year Ended December 31, 2019 B.GRIMM POWER PUBLIC COMPANY LIMITED Management’s Discussion

Building Products Public Company Limited and its subsidiary company (together referred to as the “Corporate Group”) would like to clarify on the operating results according to the consolidated financial