. (Revised) Dear sir, We, Unimit Engineering Public Company Limited (UEC) , would like to clarify the change in operating result for Q1/2019 which changing over 20% from the same period last year as follows

No.021/2018 August 15, 2018 Subject: Report the operating result for the 2nd Quarter ended June 30, 2018 and the explanation for the causes of change more than 20% in the Company’s performance

until the gross profit being reported differently from the previous periods Operating Highlights in Q4/2019 & 2019 Q4/18 Q3/19 Q4/19 Change +/(-) 2018 2019 Change+/(-) (Unit: Million Baht) QoQ YoY

receivable under finance lease, Financial Performance of the Group 2 Sales and service income for the period ended 31 March 2021 and 2020 are presented below: Sales and service income Q1-2021 Q1-2020 Change

its subsidiary for the first quarter ended 31 March 2019 which the details are as follows: Unit: million Baht For 3-month period (Jan-Mar) 2019 2018 Change % Increase (Decrease) Revenue from sale of

year ended December 31, 2019 which the details are as follows: Unit: million Baht For the year ended December 31 2019 2018 Change % Increase (Decrease) Revenue from sale of goods 689.16 653.89 35.27 5.39

date on January 1, 2020. By this summarization of business operation and financial statement of year 2019 was prepared under standard before the change and does not have retrospective improvements on

ended 31 March 2020 which the details are as follows: Unit: million Baht For 3-month period (Jan-Mar) 2020 2019 Change % Increase (Decrease) Revenue from sale of goods 156.58 167.64 (11.06) (6.60) Revenue

Baht) Separate financial statements 2018 2017 % Change Sales and Service Income 1,940.22 1,979.16 (1.97) Cost of Sales and Services 1,572.51 1,525.25 3.10 Selling and Administrative Expenses 218.91

22.31 n 4 n r 5 9 6 1 The main Revenue f For the nin increasing year. The i Co., Ltd. ( 2019) of i million or project in T For the thi main reaso same perio 145.41% fr Cost of sal For the nin reason was