ACC1/20-012 February 25, 2020 Subject: Management Discussion and Analysis for the year ended December 31, 2019 To: Director and Managing Director The Stock Exchange of Thailand Qualitech Public

AC 52/07-003 ACC1/19-042 August 13, 2019 Subject: Management Discussion and Analysis Quarter 2 Ending June 30, 2019 To: Director and Managing Director The Stock Exchange of Thailand Qualitech Public

-English translation- M06/006/19 August 14, 2019 Subject Clarification of Q2/2019 Company Performance To The President of the Stock Exchange of Thailand Reference MDX Public Company Limited and its

Ref Ref. 2S_BoD013/2019 August 14, 2019 Subject: Clarification of the change in operating result more than 20% To : The president The Stock Exchange of Thailand 2S Metal Public Company Limited (the

Manager The Stock Exchange of Thailand The operating performance for three-month period end 30 June 2019 of Mahachai Hospital Public Company Limited compared to the prior year was decreasing in net profit

No. SN.LK 022/2018 August 10, 2018 Subject Management Discussion and Analysis for the 2nd quarter ended June 2018 To The President The Stock Exchange of Thailand Indara Insurance Public Company

The Securities and Exchange Commission (SEC) participated in the seminar titled "Business and Human Rights: Creating Opportunities for Thai Companies to Grow Sustainably," as part of the Bangkok

participation and key roles in the international arena. This meeting is an important platform for APRC members to discuss and exchange views on various topics related to capital market development and

disclosure of information related to digital asset investment via the Electronic Information Transmission System of the Stock Exchange of Thailand (SET), their own company websites and the annual registration

Bangkok, 25 October 2017 ? The SEC in cooperation with securities companies, asset management companies and the Stock Exchange of Thailand Group exercised a joint cyber drill to raise the industry's