-Translation- Ref. EIC-AD017/2018 May 15, 2018 Subject: Management Discussion and Analysis for the Quarterly Performance Ending March 31, 2018 To: President The Stock Exchange of Thailand Reference is made to

MDA Q2_61 EN -Translation- No. ECF2 033/2018 August 15, 2018 Subject: Management Discussion and Analysis of the 2nd quarter ended June 30, 2018 To President The Stock Exchange of Thailand East Coast

(Translation) UAC.CS/021/2018 November 14, 2018 Subject: Explanation of the operating results for the third quarter period ended September 30, 2018 To: President The Stock Exchange of Thailand

) (175.13) 147.93 -84.47% Currency differences on translation (2.16) (0.58) (1.58) 270.94% (29.36) (175.72) 146.36 -83.29% (26.35) (172.13) 145.78 -84.69% Gross Profit (Loss) Company's Performance For Quarter

Translation CEN 016-2020 August 14, 2020 Subject Management Discussion and Analysis for business operation of Quarter 2/2020 To The Manager and President The Stock Exchange of Thailand Capital

% Corporate Tax (Expenses) Rev (48.82) 11.38 11.38 -528.97% (822.37) (598.03) (373.99) 59.99% Actualrial gain/(loss) (4.48) - Currency differences on translation 0.54 0.46 0.46 17.15% (826.32) (597.57) (373.53

Rnj, (Translation) MD. 073/2020 May 13 , 2020 Re: Management Discussion and Analysis For the Operating Results ended March 31, 2020 To: President The Stock Exchange of Thailand Management Discussion

(Translation) UAC.CS/015/2020 August 14, 2020 Subject: Explanation of the operating results for the second quarter period ended June 30, 2020 To: President The Stock Exchange of Thailand Attachment

163.17 42.9% 202.75 46.0% 39.58 24.3% SG&A 58.51 15.4% 83.78 19.0% 25.27 43.2% EBIT 104.66 27.5% 118.97 27.0% 14.31 13.7% Share of Gain in Associates - - 0.51 0.1% 0.51 - Interest Expenses 0.48 0.1% 0.35

-Translation- No. ECF2 005/2019 17 January 2019 Subject: Cancellation of the resolutions of the Board of Directors’ Meeting No. 13/2018 in relation to the investment in the ordinary shares of S-TREK