Energy Recovery Unit from Thai Oil Public Company Limited and entry into the relevant agreements (Edited) Attention: President Stock Exchange of Thailand Enclosure: Information Memorandum on Asset

Transactions Deemed as Acquisition or Disposal of Assets dated August 31, 2008 (as amended) and the Notification of the Board of Governors of the Stock Exchange of Thailand Re: Disclosure of Information and

(Translation) No. CK-19-0000-PO-L-0008 February 28, 2019 Re: Scheduling of the 2019 Annual Ordinary General Meeting of Shareholders and Declaration of Dividend Payment Attn: President of the Stock

the Stock Exchange of Thailand CH. Karnchang Public Company Limited hereby informs the resolutions of the Board of Directors’ Meeting No. 1/2019 which was held on February 28, 2019 as follows: 1

regarding Definition of Institutional Investor, Ultra High Net Worth, and High Net Worth Investor; “client” means user of an intermediary’s services; “Stock Exchange” means the Stock Exchange of Thailand

providing services relevant to renting or using area, as the case may be. “SET” means the Stock Exchange of Thailand. Clause 2 This Notificaiton: (1) contains regulations to be used in conjunction with the

(Additional) To President The Stock Exchange of Thailand Enclosure 1. Information Memorandum on the Asset Acquisition (Addendum 1) regarding acquisition of shares of S-TREK (Thailand) Co., Ltd. in the

Deemed as Acquisition or Disposal of Assets dated August 31, 2008 and the Notification of the Board of Governors of the Stock Exchange of Thailand Re: Disclosure of Information and Other Acts of Listed

limited company; (8) “listed company” means any company having shares listed on the Stock Exchange of Thailand; (9) “offering convertible bond at lower market price” means offer for sale of convertible bond

Transaction on Acquisition of Assets and Determination of the 2020 Annual General Meeting of Shareholders To: Director and Manager The Stock Exchange of Thailand Enclosure 1. Information Memorandum on the