ED-MD2020-0022 June 25th, 2020 Subject: Information Memorandum regarding the approval and ratification of the purchase land 3 plots Attention: Directors and Managers The Stock Exchange of Thailand

Manager of The Stock Exchange of Thailand Union Petrochemical Public Company Limited and its subsidiaries ("the Company") would like to clarify the operating results for the Year 2019 ended December 31

หัวข้อ (Translation) No. Tor.For 17/2017 September 29, 2017 Subject : Progress of the decrease of registered capital of subsidiary Attention : The President of the Stock Exchange of Thailand The

Manager of The Stock Exchange of Thailand Union Petrochemical Public Company Limited and its subsidiaries ("the Company") would like to clarify the operating results for the Quarter1/2020 ended March 31

Page 1 of 1 ACC6508/001 August 11, 2022 Subject: Clarification of operating results for the second quarter of 2022 ended June 30, 2022 Dear Directors and Managers Stock Exchange of Thailand According

1 EFORL 031/2017 August 15, 2017 Subject: Notification the waiver of subscription right to capital increase of WCI Holding Co., Ltd. To: President The Stock Exchange of Thailand Ref: Letter no. EFORL

offered to the public but must be listed on the Stock Exchange of Thailand. For infrastructure trust with exceeding 30% of its investment in infrastructure project under construction, the unit trust will be

Board No.TorJor.21/2551 re: Rules on Connected Transactions dated 31 August 2008 and its amendment, and Notification of The Board of Governors of The Stock Exchange of Thailand Re: Disclosure of

1 No. CC20190805ELE August 13, 2019 Subject Report of the Resolutions of Board of Directors’ Meeting No.3/2019 To President The Stock Exchange of Thailand The Board of Directors’ meeting of Cal-Comp

exchange? Yes No If yes, please specify the name and country of the stock exchange Do you have any experience relating to the audit of the financial statements of the public interest entities whose shares