of Governors of the Stock Exchange of Thailand Reference is made to the resolutions of the Board of Directors’ Meeting No. 6/2018 of Master Ad Public Company Limited (the “Company”), held on May 17

:  Rules and Practices Regarding Currency Exchange and Measures to Prevent Thai Baht Speculation The Bank of Thailand issued Notice of the Competent Officer on Rules and Practices regarding Currency Exchange

Media Public Company Limited No. 2 (VGI-W2), Capital Increase through a General Mandate and Calling the 2018 Annual General Meeting of Shareholders To The President The Stock Exchange of Thailand

Securities and Exchange Commission No. Sor Nor. 87/2558 Re: Rules, Conditions, and Procedures for Management of Retail Funds, Mutual Funds for Accredited Investors, Mutual Funds for Institutional Funds, and

., and Schedule for the EGM of Shareholders No. 1/2019 To: The President The Stock Exchange of Thailand Enclosure: 1. Information Memorandum of Hydrotek Public Company Limited on Disposal of Assets and

., and Schedule for the EGM of Shareholders No. 1/2019 (Revised) To: The President The Stock Exchange of Thailand Enclosure: 1. Information Memorandum of Hydrotek Public Company Limited on Disposal of

., and Schedule for the EGM of Shareholders No. 1/2019 (Revised2) To: The President The Stock Exchange of Thailand Enclosure: 1. Information Memorandum of Hydrotek Public Company Limited on Disposal of

., and Schedule for the EGM of Shareholders No. 1/2019 (Revised3) To: The President The Stock Exchange of Thailand Enclosure: 1. Information Memorandum of Hydrotek Public Company Limited on Disposal of

Assets and Connected Transaction for the Entire Business Transfer and Allocation of Securities to the Specific Investor (Private Placement) To The President The Stock Exchange of Thailand Attachment 1

" of the Securities and Exchange Commission (SEC). An English version of the MD&A has been prepared from the Thai version. In the event of a conflict or a difference in interpretation between the two