September 2017 Subject: Notification of the Board of Directors No.8/2017 and the date of the Extraordinary General Meeting of Shareholders No. 1/2017 (Amended) To: The President The Stock Exchange of Thailand

September 2017 Subject: Notification of the Board of Directors No.8/2017 and the date of the Extraordinary General Meeting of Shareholders No. 1/2017 (Amended 2) To: The President The Stock Exchange of

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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

Ref.No.IVL001/08/2019 8th August 2019 President The Stock Exchange of Thailand Subject: Acquisition of Integrated Oxides and Derivatives Businesses/ Assets Enclosure: Information concerning the Acquisition of

(loss) of the year 464.4 29.2% (299.9) (11.4%) (164.6%) Adjusted items Net unrealized loss on exchange rate - - 29.0 1.1% - Non-recurring items2 235.5 14.8% (261.8) (9.9%) (211.2) Adjusted EBITDA3 715.8

แบบแสดงรายการข้อมูลสำหรับการเสนอขายหลักทรัพย์ (แบบ 69-1) 1 No. WHAUP-CS015/2562 August 08, 2019 Attention: Managing Director – Stock Exchange of Thailand Subject: Report of Financial Results for the

bond of USD 180m (“the Bond”) exercised the right to early redeem 100% of the Bond and the Bond was delisted from the Singapore Exchange already. Regarding the redemption, the Company received financial

Office of the Securities and Exchange Commission with regard to their operating performance and financial position. 3. Criteria for digital asset businesses: Digital asset businesses are categorized into

Board No. Tor.Jor. 20/2008 regarding Criteria for entering into significant transaction that is the acquisition or disposal of assets and Notification of the Board of Governors of the Stock Exchange of