. OCMSET/1907/003 July 30, 2019 Subject: Clarification of the operating results for the six-month period of 2019, change of rate more than 20% Dear: Director and Manager the Stock Exchange of Thailand

and Analysis Quarterly Ending June 30, 2019 To : The President The Stock Exchange of Thailand The Board of Directors meeting of Ratchaphruek Hospital Public Company Limited (the Company) No. 3/2019

: President The Stock Exchange of Thailand Pursuant to JAS Asset Public Company Limited (“the Company”) Meeting Resolution No. 6/2019 on 6 August 2019, the resolution to certify the Company’s financial

ที่บชง Page 1 of 4 Ref. Bor Chor Ngor 0280/2019 13 August 2019 Subject: Management Discussion and Analysis for the Second Quarter ended 30 June 2019 To President The Stock Exchange of Thailand

Stock Exchange of Thailand The Board of Director’s meeting No. 4/2018 of General Engineering Public Company Limited (“the Company”) held on 15 May 2018 has approved and verified the financial statements

: Management explanation and analysis for the 2nd Quarter ended 30 June 2018 Attention : The President of, The Stock Exchange of Thailand ZIGA Innovation Public Company Limited (“ the Company”) would like to

Management Discussion and Analysis, Q2/2018 Page 1/3 Ref: IR61/014 10 August 2018 Subject: Management Discussion and Analysis, 2nd Quarter Ending 30 June 2018 To : President The Stock Exchange of

and Analysis Quarterly Ending September 30, 2018 To : The President The Stock Exchange of Thailand The Board of Directors meeting of Ratchaphruek Hospital Public Company Limited (the Company) No. 4/2018

1/5 Ref. 4/2019 January 11, 2019 Subject : The acquisition of investment in Ramkhamhaeng Hospital PCL. To : Director and Manager The Stock Exchange of Thailand The Board of Directors Meeting

Ref. PDI/BK-BS-064/2019 12th November 2019 Re: Management Discussion and Analysis (MD&A) For the three-month and nine-month periods ended September 30, 2019 To: President The Stock Exchange of