13_MDA Q1_2563 EN -Translated Version- No. ECF2 018/2020 May 15, 2020 Subject: Management Discussion and Analysis of the 1st quarter ended 31 March, 2020 To President The Stock Exchange of Thailand

right to purchase, or to convert those securities into, shares of such business; (2) “Business” means a company whose shares are listed on the Stock Exchange; (3) “SEC Notification No. KorChor. 53/2545

pay to increase in capital of GS proportionally which mean the Company hold GS’s share for 40 percent. (The details in clause 4 sub-clause 3) page 14) The entering into the transaction constitutes an

Notification of the Board of Governor of the Stock Exchange of Thailand Re: Disclosure of Information and Other Acts of Listed Companies concerning Connected Transactions B.E. 2546 (2003) (as amended) (the

Governor of the Stock Exchange of Thailand Re: Disclosure of Information and Other Acts of Listed Companies concerning Connected Transactions B.E. 2546 (2003) (as amended) (the “Connected Transaction

Transactions Deemed as Acquisition or Disposal of Assets, and the Notification of the Board of Governors of the Stock Exchange of Thailand Re: Disclosure of Information and Other Acts of Listed Companies

., 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