ชี้แจงผลการดำเนินงานของบริษัทและบริษัทย่อยประจำปี 2549 UKEM004/2019 February 27, 2019 Subject : Management Discussion and Analysis of Business Operation results for Year 2018 To : Director and

UKEM010/2019 May 13, 2019 Subject : Management Discussion and Analysis of Business Operation results for

AC 52/07-003 ACC1/19-042 August 13, 2019 Subject: Management Discussion and Analysis Quarter 2 Ending June 30, 2019 To: Director and Managing Director The Stock Exchange of Thailand Qualitech Public

จดหมายชี้แจงq262e August 14, 2019 The Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis for three month Ending 30 June 2019 Summary on Second Quarter

ชี้แจงผลการดำเนินงานของบริษัทและบริษัทย่อยประจำปี 2549 UKEM013/2018 May 11, 2018 Subject : Management Discussion and Analysis of Business Operation results for Quarter 1/2018 To : Director and

จดหมายชี้แจงq261e August 14, 2018 The Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis for three month Ending 30 June 2018 Summary on Second Quarter

Stock Exchange of Thailand For the Q3/2018 period ended of September 30, 2018 (3 months) operating result of the company net profit Baht 4.79 Million comparison with the previous Q3/2017’s net loss of

UKEM021/2018 September 12, 2018 Subject : Management Discussion and Analysis of Business Operation

writer Ref. No. 158/2562 November 13, 2019 SUBJECT : Management Discussion and Analysis ending September 30, 2019 ATTN : The President Stock Exchange of Thailand The Company realized profit for the

AC 52/07-003 ACC1/20-030 May 11, 2020 Subject: Management Discussion and Analysis Quarter 1 Ending March 31, 2020 To: Director and Managing Director The Stock Exchange of Thailand Qualitech Public