1 Translation CEN 025-2017 November 13, 2017 Subject : Management Discussion and Analysis for business operation of quarter 3/2017 To The Manager and President The Stock Exchange of Thailand For 3

1 / 2 IR.017/2019 13 August 2019 Re: Notification of the changes of the Profit and Loss Statement To President The Stock Exchange of Thailand We, T Engineering Corporation Public Company Limited (the

1 / 2 IR.023/2018 13 November 2018 Re: Notification of the changes of the Profit and Loss Statement To President The Stock Exchange of Thailand We, T Engineering Corporation Public Company Limited

Translation CEN 034-2018 November 13, 2018 Subject : Management Discussion and Analysis for quarter 3-2018 To : The Manager and President The Stock Exchange of Thailand Business operation for 3

MDE01_2018_10Jan2019 draft (Translation) No. 01/2019 January 10, 2019 President The Stock Exchange of Thailand Re: Notification of the Resolution of the Board of Directors’ Meeting No. 1/2019 We

1 / 3 IR.031/2020 13 August 2020 Re: Notification of the changes of the Profit and Loss Statement To President The Stock Exchange of Thailand We, T Engineering Corporation Public Company Limited (the

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-Translation- Ref. No. PorBor. 050 / 2019 December 27, 2019 Subject: Entering into Transaction of Acquisition of Associate Company’s ordinary shares To: President The Stock Exchange of Thailand

certified public accountants, prohibited characteristics, and qualifications used for registration, whether with authority or not, training history at the Thai Institute of Directors. Financial data: Data