ที่ BCH No. BCH.211/2017 8 November 2017 Subject : Explanation of the change in operating results of Q3/2017 which exceed 20% To : The President The Stock Exchange of Thailand Bangkok Chain Hospital

, Unimit Engineering Public Company Limited (UEC) , would like to clarify the change in operating result for Q3/2017 which changing over 20% from the same period last year as follows ; Unimit and its

, Unimit Engineering Public Company Limited (UEC) , would like to clarify the change in operating result for 2017 which changing over 20% from the same period last year as follows ; Unimit and its

- 2019 Balance by Quarter Change Q1–19 Q4–18 Q1–18 Q1–19 VS Q4–18 Q1–19 VS Q1–18 (Million Baht: MB) (MB) % (MB) % Total Revenue 1,266.5 1,109.5 1,044.9 157.0 14.2 221.6 21.2 Total Operating Expenses

. 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 ; Unimit

. (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

ที่ - Translation - PorBor. 018 / 2018 May 15, 2018 Subject: Clarification of operating results change from the same period last year by more than 20% To: President The Stock Exchange of Thailand

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

result. Dear sir, We, Unimit Engineering Public Company Limited (UEC) , would like to clarify the change in operating result for Q3/2018 which changing over 20% from the same period last year as follows

value of the associates for the year 2017 and the total amount Consolidated Separate Amount Change Amount Change 2017 2016 Amount % 2017 2016 Amount % Revenue from sale – net 1,444.62 1,370.78 73.84 5