Manager The Stock Exchange of Thailand The Board of Directors Meeting of O.C.C. Public Company Limited No. 7/2561 dated December 18, 2018 approved the Company’s waiver of the rights to purchase newly issued

(Translation) No.Tor.For. 24/2018 21 December 2018 Subject : To sell common shares of Waseda Education (Thailand) Company Limited to connected person. Attention : The President of the Stock Exchange

(Translation) Ref: EIC-AD043/2019 13 November 2019 Subject: Management Discussion and Analysis for the Performance for Nine-Month Period ended 30 September2019 To: President The Stock Exchange of Thailand The

and Manager The Stock Exchange of Thailand According to the resolution of the meeting of the Board of Directors No. 4/2019 of Wattanapat Hospital Trang Public Company Limited (“the Company”) held on 13

Assets N Hospital Company Limited with additional 16.67 percent To : The President The Stock Exchange of Thailand The Board of Directors’ Meeting of World Corporation Public Company Limited (“the Company

February 28, 2020 SET-20-AC-001 Dear The President The Stock Exchange of Thailand Subject : Clarification of Result’s Operation for the year ended 31 December 2019 According to the resolution of

Page 1 Date 13 May 2020 Re: Management Discussion & Analysis for the 3-months period Ended 31 March 2020 To The President of the Stock Exchange of Thailand (SET) CHAOPRAYAMAHANAKORN PUBLIC COMPANY

and Analysis Quarterly Ending June 30, 2020 To : The President The Stock Exchange of Thailand The Board of Directors meeting of Ratchaphruek Hospital Public Company Limited (the Company) No. 4/2020

No No. CC20200806ELE Aug 13, 2020 Re: Clarification of the changes in operation performance for the second quarter and the first half ended 30 June 2020 Attn: The President The Stock Exchange of

Exchange of Thailand The Board of Directors’ Meeting of Ladprao General Hospital Public Company Limited (the “Company”), No.4/2020, held on August 14, 2020, has approved the financial statements of the