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

ที่ กตพ Ref. DBP. 107 / 2018 August 14, 2018 Subject : Clarification on Operating Results for the 3-month Period and 6-month Period ending June 30, 2018 To : President The Stock Exchange of Thailand

ที่ กตพ Ref. DBP. 156 / 2018 November 12, 2018 Subject : Clarification on Operating Results for the 3rd quarter and 9-month Period ending September 30, 2018 To : President The Stock Exchange of

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

and the Notification of the Board of Governors of the Stock Exchange of Thailand (SET), entitled Disclosure of Information and Other Acts of Listed Companies concerning the Connected Transaction, B.E

(Translation) No. IR/2561/010 27 February 2018 Subject: Acquisition of assets To: President The Stock Exchange of Thailand Enclosures: Information Memorandum of Singha Estate Public Company Limited

2017 Subject: Notification of the Board of Directors No. 10/2017, Postponement of the date of the Extraordinary General Meeting of Shareholders No.1/2017 and the Record Date To: The President The Stock

Nation U Co., Ltd., the subsidiary of the Company, and change in the accounting policy regarding the record of the land valuation To: Director and Manager The Stock Exchange of Thailand (SET) Attachment

No. MVP005/2020 21 February 2020 Subject: Management Discussion and Analysis for the year ended 31 December 2019 To: President and Manager The Stock Exchange of Thailand M Vision Public Company

, 2017 To: President of the Stock Exchange of Thailand Seamico Securities Public Company Limited (“The Company”) would like to report the unaudited operating result for the period ended June 30, 2017 as