November 13, 2020 Subject: The Management Discussion and Analysis for the third quarter ended September 30, 2020 To: President The Stock Exchange of Thailand Well Graded Engineering Public Company Limited

prohibited from trading securities on the Stock Exchange or over-the-counter trading centers or entering into derivatives contracts on the Derivatives Exchange for one year and six months, and banned from

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Microsoft Word - 2019_Q2 Results Notification letter_English _1st Draft_ August 13, 2019 The Director and Manager The Stock Exchange of Thailand Re: Information on Operating Results for the Second

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

ที่ กตพ Ref. DBP. 108 / 2019 August 13, 2019 Subject : Clarification on Operating Results for the 2nd quarter and 6-month Period ending June 30, 2019 To : President The Stock Exchange of Thailand

- - Book Value (Baht per Share)* 2.32 2.19 0.13 5.94 Remark: * Calculated based on the number of issued and paid-up ordinary shares deducted by the number of treasury stock The Corporate Group’s total assets

)* 929.58 947.96 (18.38) (1.94) Book Value (Baht per Share)* 2.05 2.38 (0.33) (13.87) Remark: * Calculated based on the number of issued and paid-up ordinary shares deducted by the number of treasury stock

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