hosting an annual conference must be submitted three years in advance. The SEC will submit the proposal for hosting the IOSCO annual conference on 7 June 2019 according to the IOSCO schedule. If passing

Office, 189 JMART B Building, Second Floor, Ramkamheang Road, Rat Phatthana, Saphan Sung Bangkok with the agenda as follows: Agenda 1 To certify the minutes of Extraordinary General Meeting of the

, Bangkok 10900, having the agenda items as follows: Agenda 1 To consider and certify the minutes of the 2017 Annual General Meeting of Shareholders Agenda 2 To consider and approve the increase of the

., 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

/2019 To Director and Manager The Stock Exchange of Thailand Enclosure 1. Information Memorandum on the Acquisition of Assets (Schedule 1) Regarding the Purchase of the Ordinary Shares of KPN Academy

/2019 (additional) To Director and Manager The Stock Exchange of Thailand Enclosure 1. Information Memorandum on the Acquisition of Assets (Schedule 1) Regarding the Purchase of the Ordinary Shares of KPN

/2019 (2nd additional) To Director and Manager The Stock Exchange of Thailand Enclosure 1. Information Memorandum on the Acquisition of Assets (Schedule 1) Regarding the Purchase of the Ordinary Shares of