Zen Corporation Group Public Company Limited 782/1 Soi Onnuch 17, Suanluang, Bangkok 10250 THAILAND Tel: 02-0195000 18 February 2019 No. ZEN 2562-002 Subject Management Discussion and Analysis for

Zen Corporation Group Public Company Limited 782/1 Soi Onnuch 17, Suanluang, Bangkok 10250 THAILAND Tel: 02-0195000 18 February 2019 No. ZEN 2562-006 Subject Management Discussion and Analysis for

Dusit Thani PLC Management Discussion and Analysis For 4Q19 and FY2019 P a g e | 1 Executive Summary 2019 marked our first year in the second phase of the Company’s 9-year strategic journey (2019

2017_Q2_MDA_ENG -Final Ocean Glass Public Company Limited Page 1/3 Management Discussion and Analysis Operating Results In the 2nd quarter of 2017, Ocean Glass Public Company Limited and Subsidiaries

2017_Q3_MDA_ENG Ocean Glass Public Company Limited Page 1/3 Management Discussion and Analysis Operating Results In the 3rd quarter of 2017, Ocean Glass Public Company Limited and Subsidiaries (“the

373.88 36.57 Other income 5.96 13.15 (7.19) (54.67) Cost of service 1,054.29 761.49 292.80 38.45 Expenses of sales 46.13 41.25 4.89 11.85 Expenses of management 170.92 133.48 37.44 28.05 Expenses of

increased by Baht 11.24 million or an increase of 2.73 percent. Details of the changes or impacts are described in the Management Discussion and Analysis (MD&A) as attached herewith. Please be informed

the Management Discussion and Analysis (MD&A) as attached herewith. Please be informed accordingly. Yours faithfully, For and on behalf of Diamond Building Products Public Company Limited (Mr. Satid

profit of the Corporate Group for the 1st quarter 2019 would be Baht 165.62 million or an increase of 18.30 percent. Details of the changes or impacts are described in the Management Discussion and

Management Discussion and Analysis For the Annual Operating Results 2018 Ended December 31, 2018 Note: This Management Discussion and Analysis (MD&A) was made to disclose information and the vision