15 May 2019 Subject: Management Discussion and Analysis for the 3-Month Period Ended March 31, 2019 To: Directors and Managers The Stock Exchange of Thailand Halcyon Technology Public Company Limited

ที่ บช NO. AC. 002/2019 15 May 2019 Subject: Clarification of changes in operating performance of more than 20% To: The President of the Stock Exchange of Thailand M.K. Real Estate Development Plc

: Interim Analysis and Explanation of the Management To: Directors and Managers The Stock Exchange of Thailand Short-term loan from directors As of June 30, 2019, the company had a short-term loan from

15 May 2018 Subject: Management Discussion and Analysis for the 3-Month Period Ended March 31, 2018 To: Directors and Managers The Stock Exchange of Thailand Halcyon Technology Public Company Limited

operating results that posted a difference greater than 20% from the preceding year To: Director and Manager the Stocks Exchange of Thailand World corporation public company limited ("the Company") and its

Justification_E_2-61 NO. AC. 003/2018 14 August 2018 Subject: Clarification of changes in operating performance of more than 20% To: The President of the Stock Exchange of Thailand M. K. Real Estate

of the Stock Exchange of Thailand Seamico Securities Public Company Limited and its subsidiaries (“The Company”) would like to report operating result that has been audited by our auditor for the

Ref. 66/2018 November 27, 2018 Subject : Waiver of rights to purchase ordinary shares of Dhipaya Bodin Co., Ltd. To : Director and Manager The Stock Exchange of Thailand The Board of Directors

Exchange of Thailand. Demco Public Company Limited would like to inform you herewith the company result for the quarter 1/2020 according to the company’s consolidated financial statements for the year ended

T.K.S. TECHNOLOGIES 11 August 2020 Re: Management Discussion and Analysis for Quarter 2/2020 To: President The Stock Exchange of Thailand T.K.S. Technologies Public Company Limited (“TKS”) and its