E141117 Our Ref: TL034/17 November 14, 2017 The Stock Exchange of Thailand 93, The Stock Exchange of Thailand Building Ratchadapisek Road, Dindaeng, Bangkok 10400 Attention: The President Dear Sir

Our Ref: TL015/02 Our Ref: TL014/18 November 13, 2018 The Stock Exchange of Thailand 93, The Stock Exchange of Thailand Building Ratchadapisek Road, Dindaeng Bangkok 10400 Attention: The President

, Share of Profit from Investments was Baht 339.2 million, a 48.5% decrease from Baht 659.2 million in 1Q2018. These amount included the non-operating items which are i) Foreign Exchange Gain of Baht 94.6

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

Microsoft Word - ACE MDA Q2 23 - EN 1 No. ACE-ACC-3/2023 11 August 2023 Subject Management Discussion and Analysis for the period ended 30 June 2023 To President The Stock Exchange of Thailand

ที่บชง Page 1 of 4 Ref. Bor Chor Ngor 0280/2019 13 August 2019 Subject: Management Discussion and Analysis for the Second Quarter ended 30 June 2019 To President The Stock Exchange of Thailand

decrease was derived from engineering service, solar energy, and Trading business. • Overall gross profit margin decreased from 13.3% to 9.1% amount Baht (24.09) million. 2019 2018 Revenue 383.44 443.08

-Translation - Ref. APURE 002/2019 February 22, 2019 Subject : Financial Position and Operating Performance of year 2018 Attention : The Director and President of the Stock Exchange of Thailand

Ref: FASET 01/2562 February 26, 2019 Subject: Report the operating result for the year ended December 31, 2018 To: President of the Stock Exchange of Thailand Seamico Securities Public Company

performance for 3-month period ended June 30, 2017. To Managing Director The Stock Exchange of Thailand The Operating results of the company and its subsidiaries for the 3-month period ended June 30, 2017 as in