: Management explanation and analysis for three-month period ended 31 March 2018 Attention : The President of, The Stock Exchange of Thailand ZIGA Innovation Public Company Limited (“the Company”) would like to

1 Ref: CK-18-0000-AFD(AC)-L-0022 May 15, 2018 Subject: Clarification on Operating Result and Financial Position for the three-month ended March 31, 2018 Attention: President The Stock Exchange of

: 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 Page1/4 Ref. IR61/12 10 August 2018 Subject: Management Discussion and Analysis, 2nd Quarter Ending 30 June 2018 To : President Stock Exchange of Thailand

November 13, 2018 Subject: MD&A for the financial statements of the 3rd quarter of fiscal year 2018 ended as of September 30, 2018 To: The President The Stock Exchange of Thailand Aapico Hitech Public

Page 1 of 4 No. RJH – SET 9/2020 10 August 2020 Subject : Management’s Discussion and Analysis for the Second Quarter of 2020 To : The President The Stock Exchange of Thailand Rajthanee Hospital

Connected Transaction (the extend period for granted financial assistance) To: The President The Stock Exchange of Thailand G J Steel Public Company Limited (“the Company”) would like to report information on

Stock Exchange of Thailand Demeter Corporation Public Company Limited (“DCORP” or the “Company”) would like to submit the reviewed financial statements for first quarter of the year 2019 ended March 31

Stock Exchange of Thailand Demeter Corporation Public Company Limited (“DCORP” or the “Company”) would like to submit the reviewed financial statements for second quarter of the year 2019 ended June 30

Ref. DBP. 068 / 2018 May 14, 2018 Subject : Clarification on operating results for the 1st Quarter ending March 31, 2018 To : President The Stock Exchange of Thailand Diamond Building Products Public