. Tradsin Chongussayakul ) Chief Executive Officer and Acting Managing Director T Engineering Corporation Public Company Limited

จดหมายชี้แจงปี60e February 22, 2018 The Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis Ending 31 December 2017 Summary of operating result between 2017

ทดสอบกระดาษหัวจดหมาย IRC 5 -Translation- 13 May 2019 Subject: Notification of a Related-Party Transaction To: Managing Director of the Stock Exchange of Thailand Please be informed that the Board of

Officer and Acting Managing Director T Engineering Corporation Public Company Limited

(Auto 11 Lines) Fax: +66(0)2-192-3744 Page 1 of 1 -Translation- No. ED-MD18-014 14th August 2018 Subject : Clarification of changes in excess of 20% in the operating results for year Q2/2018 To : Director

ทดสอบกระดาษหัวจดหมาย IRC 5 -Translation- 11 May 2020 Subject: Notification of a Related-Party Transaction To: Managing Director of the Stock Exchange of Thailand Please be informed that the Board of

จดหมายชี้แจงq363e November 13, 2020 Managing Director Stock Exchange of Thailand Subject : Management Discussion and Analysis for three month Ending 30 September 2020 Summary onThird Quarter result

จดหมายชี้แจงq263e August 13, 2020 Managing Director Stock Exchange of Thailand Subject : Management Discussion and Analysis for three month Ending 30 June 2020 Summary on Second Quarter result

allocated assets prior to others. These customers must not be individuals with a relationship to the derivatives broker in such manners as director, executive, major shareholder and controlling person of

sold, at Baht 1.25 per share, at the purchase price of Baht 375,000; 2 The total purchase price amounts to Baht 5,375,000. It was further resolved in the Meeting that the managing director and/or the