1 August 17, 2018 Subject: Capital Increase for Offering for Sale to Specific Investors (Private Placement), Connected Transaction, Amendments to Articles of Association/Objectives of the Company and

Subject Notification of the Board of Directors No.6/2018 Re: Convening the Extraordinary Shareholders’ Meeting No.1/2018; an Acquisition of Assets and Connected Transaction for the Entire Business Transfer

, Bangkok 10900, Thailand Fax : (662) 936-1669 ทะเบียนเลขท่ี 0107554000097 Registration No. 0107554000097 HYDROTEK PUBLIC COMPANY LIMITED บริษทั ไฮโดรเท็ค จ ำกดั (Translation) No. 037/0561 May 8, 2018 Subject

Ref. No. IVL 003/02/2019 26 February 2019 The President The Stock Exchange of Thailand Subject: Submission of Annual Audited Financial Statements and the Management Discussion and Analysis of

, which are, by their nature, subject to significant risks and uncertainties. These forward-looking statements reflect our current views with respect to future events and are not a guarantee of future

” statements that relate to future events, which are, by their nature, subject to significant risks and uncertainties. These forward-looking statements reflect our current views with respect to future events and

Microsoft Word - 5. TKS - SET Announcement (BOD) (EN) - final (amended).docx 1 (-Translation-) Ref. IR 60/011 December 12, 2017 Subject: Reduction of the Registered Capital, Conditional Voluntary

Microsoft Word - 5. TKS - SET Announcement (BOD) (EN) - final (first amendment with allocation ratio).docx 1 (-Translation-) Ref. IR 60/011 December 12, 2017 Subject: Reduction of the Registered

Microsoft Word - 5. TKS - SET Announcement (BOD) (EN) (2nd amendment).docx 1 (-Translation-) Ref. IR 60/011 December 12, 2017 Subject: Reduction of the Registered Capital, Conditional Voluntary

contains “forward-looking” statements that relate to future events, which are, by their nature, subject to significant risks and uncertainties. These forward-looking statements reflect our current views with