10th May, 2018 Subject: Management Discussion and Analysis (MD&A) of the financial as at and for three months’ period ending 31st March, 2018 Attention: President The Stock Exchange of Thailand P.C.S

Zen Corporation Group Public Company Limited 782/1 Soi Onnuch 17, Suanluang, Bangkok 10250 THAILAND Tel: 02-0195000 18 February 2019 No. ZEN 2562-008 Subject Management Discussion and Analysis for 9

project with the Department of Industrial Promotion. To reduce production costs and increase gross margin to sales and service income from 0.42 percent in 2016 to 9.19 percent in 2017. - The company focuses

Microsoft Word - MD&A_Q1_2019_ENG 1 NPPG.036/2019 13 May 2019 Subject Management Discussion and Analysis for the quarter 1 year 2019 Attention The President The Stock Exchange of Thailand

% in the same quarter of last year. Excluding TBSP of 22.2% GP, Company’s %GP represented at 27.1%, primary by higher Gross Profit of High-Valued Document. %Gross Profit Margin Mil THB 72 102 62 Q1'18

: EIC-AD020/2019 15 May 2019 Subject: Management Discussion and Analysis for the Performance for Three-Month Period ended 31 March 2019 To: President The Stock Exchange of Thailand The Board of Directors

: EIC-AD033/2019 13 August 2019 Subject: Management Discussion and Analysis for the Performance for Six-Month Period ended 30 June 2019 To: President The Stock Exchange of Thailand The Board of Directors

: EIC-AD033/2019 13 August 2019 Subject: Management Discussion and Analysis for the Performance for Six-Month Period ended 30 June 2019 (Added Information) To: President The Stock Exchange of Thailand The

Project Management, Supply and Installation of the M&E Systems for the MRT Blue Line Extension Project at the project inception. Cost of construction services and sales of construction materials The Company

(Translation) Ref: EIC-AD043/2019 13 November 2019 Subject: Management Discussion and Analysis for the Performance for Nine-Month Period ended 30 September2019 To: President The Stock Exchange of Thailand The