. Nares Ngam-apichon Disposition Stock 20.0019 0.3787 19.6231 17/06/2020 20.0019 0.3787 19.6231   246004322006-1 MACO PLAN B MEDIA PUBLIC COMPANY LIMITED Disposition Stock 19.9557 9.9778 9.9778 14/05/2020

. Chutchaya Tritrakulchai Disposition Stock 33.3314 7.3438 25.9876 25/02/2020 33.3314 7.3438 25.9876   246002562002-1 OCEAN Mr. Teera Chutivarapon Acquisition Stock 9.1176 7.3438 16.4615 25/02/2020 9.1176

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

13_MDA Q1_2563 EN -Translated Version- No. ECF2 018/2020 May 15, 2020 Subject: Management Discussion and Analysis of the 1st quarter ended 31 March, 2020 To President The Stock Exchange of Thailand

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

Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No OCEAN Mr. Jirat Tritrakulchai Disposition Stock 6.3018 1.7105

Held Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No XPG ELEVATED RETURNS LLC Disposition Stock 7.9717

Held Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No WAVE THANAVARIN COMPANY LIMITED Acquisition Stock

Held Before Acquisition/ Disposition 2 % Group of Held Acquisition/ Disposition 2 % Group of Held After Acquisition/ Disposition 2 Remark 3 File No JTS Mrs. Lalana Tharasuk Acquisition Stock 4.9968