Shareholders in Proportion to their Respective Shareholdings and Convening of the Extraordinary General Meeting of Shareholders No. 1/2018 To: President The Stock Exchange of Thailand Enclosure: 1. Information

Stock Exchange of Thailand Enclosure: 1. Information Memorandum Re: Acquisition of Assets of T.K.S. Technologies Public Company Limited (Schedule 1) 2. Information Memorandum Re: the Allocation of the

Shareholders in Proportion to their Respective Shareholdings and Convening of the Extraordinary General Meeting of Shareholders No. 1/2018 (Second Amendment) To: President The Stock Exchange of Thailand

No. ECF2 044/2561 3 December 2018 Subject: Notification of the resolutions of the Board of Directors’ Meeting approving the investment in purchasing the ordinary shares of S-TREK (Thailand) Co., Ltd

, Bangkok 10900, Thailand Fax : (662) 936-1669 ทะเบียนเลขท่ี 0107554000097 Registration No. 0107554000097 HYDROTEK PUBLIC COMPANY LIMITED บริษทั ไฮโดรเท็ค จ ำกดั (มหำชน) (Translation) No. 089/1060 9 October

fee and 3) impact from political unrest in Hong Kong created change in plans for some Chinese tourists to visit Thailand instead. For the last quarter of 2019, the Thai economy is expected to continue

3) impact from political unrest in Hong Kong created change in plans for some Chinese tourists to visit Thailand instead. For the last quarter of 2019, the Thai economy is expected to continue to

statements and operating results of the past 3 years or since actual operation of business by providing the following information: (1) summary of auditor’s report; (2) summarized table of consolidated

สารสนเทศข่าว มติ BOD 5-60 20171204En No. NDR013/2017 Subject Resolution of the Board of Directors’ Meeting To President The Stock Exchange of Thailand Enclosure 1. Information Memorandum on the

(Thailand) Co., Ltd., capital increase, and the issuance and allocation of the newly issued ordinary shares to the specific person under the private placement basis, and the schedule for Extraordinary General