meeting empower the Executive Committee or the Managing Director to amend or change the date of determination of shareholders who shall be entitled to attend the Extraordinary General Meeting of

% Revenue from service incomes 0.49 0.42% 0.51 0.44% 0.02 3.86% Revenue from rental incomes 0.70 0.60% 0.63 0.54% (0.07) -10.66% Total revenues 116.70 100.00% 115.48 100.00% (1.22) -1.05% Gross Profit

incomes 2.87 0.65% 2.90 0.74% 0.03 0.89% Revenue from rental incomes 2.44 0.55% 2.63 0.67% 0.19 7.26% Total revenues 444.32 100.00% 393.34 100.00% (50.98) -12.96% Gross Profit / Margin 121.70 27.39% 99.52

2.87 0.65% 2.90 0.74% 0.03 0.89% Revenue from rental incomes 2.44 0.55% 2.63 0.67% 0.19 7.26% Total revenues 393.34 100.00% 444.32 100.00% (50.98) -12.96% Gross Profit / Margin 121.70 27.39% 99.52 25.30

Equity Yours faithfully, Mr. Hiroaki Sano Managing Director Financial Ratios Q2 2018 Q2 2017 Gross profit margin 19.2% 20.1% Net profit margin 12.0% 8.4% Debt to Equity ratio 0.11 0.14 Earnings per share

be inform accordingly, (Mr. Chaiyasit Samrittivanicha) Managing Director Q2/2016 Q1/2017 Q2/2017 Total Revenue (Million Baht) 217.56 218.95 204.10 Gross Profit Margin (%) 18.05 13.09 8.86 Net Profit

line as net profit. Please be informed accordingly. Sincerely Yours, ( Mr. Nipon Leelasithorn ) Chairman of the Executive Director, and Managing Director

ACC1/19-007 February 18, 2019 Subject: Management Discussion and Analysis for the year ended December 31, 2018 To: Director and Managing Director The Stock Exchange of Thailand Qualitech Public

gain sale revenue and profit from new service business. Please be informed accordingly. Yours sincerely, (Mr.Domdej Sripinproach) Managing Director

-5170529 14 November 2017 RE: Explanation of performance for the third quarter of 2017 with a change exceeding twenty percent from the previous year. ATTN: Managing Director, Stock Exchange of Thailand