DCORP 008/2020 February 26th, 2020 Subject 2019 Performance Report for the Year Ended December 31st, 2019 and the Reduction of Performance Exceeding 20% To The Securities and Exchange Commission and

005/2017 24 November 2017 Subject: Informing on the acquisition of assets of ZIGA Innovation Public Company Limited Attention: The President The Stock Exchange of Thailand Attachment: Disclosure of

significantly, and net loss from exchange rate. Separate financial statement, the Company posted net loss Baht 1,056 million comparing with previous quarter which has net profit Baht 119 million. Total revenue

and November Monetary Policy Committee meetings, taking the rate down from 1.75 percent to 1.25 percent. The Bank of Thailand also eased foreign exchange regulations to curb the strong baht and

the 2nd Quarter of 2017 Ending June 30, 2017 To : The President The Stock Exchange of Thailand The Board of Directors meeting of Ratchaphruek Hospital Public Company Limited (the Company) No. 4/2017

for the 3rd Quarter of 2017 Ending 30 September 2017 To : The President The Stock Exchange of Thailand The Board of Directors meeting of Ratchaphruek Hospital Public Company Limited (the Company) No. 5

: Management explanation and analysis for three-month period ended September 30, 2017 Attention : The President of, The Stock Exchange of Thailand ZIGA Innovation Public Company Limited (“the Company”) would

1 No. EXE. 041-12-17 December 4, 2017 Re: Report of Information on the Connected Transaction To: President The Stock Exchange of Thailand Reference is made to the resolution of Board of Directors of

Microsoft Word - 2017 Results Notification letter_English February 13, 2018 The Director and Manager The Stock Exchange of Thailand Re: Information concerning Fiscal Year 2017 Operating Results KCE

, Nhge An, Vietnam To: President The Stock Exchange of Thailand On 28 May 2018, WHAUP Nghe An Joint Stock Company (“WHAUP Nghe An JSC”), an indirect subsidiary of WHA Utilities and Power Public Company