of Governors of the Stock Exchange of Thailand Reference is made to the resolutions of the Board of Directors’ Meeting No. 6/2018 of Master Ad Public Company Limited (the “Company”), held on May 17

a result of the ability to maintain profitability, the stock buyback, and the Company’s interim dividend payment. Quarter Quarter Quarter 1/2019 4/2019 1/2020 Current ratio 0.63 0.64 0.57 Debt to

increase the asset utilization efficiency. Return on equity was 42.0% decreasing from previous, as a result of the ability to maintain profitability, the stock buyback, and the Company’s interim dividend

(Translation) UAC.CS/021/2020 November 11, 2020 Subject: Explanation of the operating results for the third quarter period ended September 30, 2020 To: President The Stock Exchange of Thailand

was 42.3% decreasing from previous quarter, as a result of the ability to maintain profitability, the stock buyback, and the Company’s interim dividend payment. Quarter Quarter Quarter 3/2019 2/2020 3

May 12, 2022 Subject: Management’s Discussion and Analysis for 1st quarter of 2022 ended as of March 31, 2022 Attention: President The Stock Exchange of Thailand AI Energy Public Company Limited (“the

project, auditors will be classified into 2 groups: (I) auditors for companies in capital market and (II) auditors for companies to be listed on SMEs board which will be launched in the future for

financial gaps and needs using internationally accepted instruments in order to identify target groups and policy areas to focus and to compare with countries in the region or internationally??Monitoring of

Ref. DBP. 111 / 2020 August 10, 2020 Subject : Clarification on Operating Results for the 2nd quarter and 6-month period ending June 30, 2020 To : President The Stock Exchange of Thailand Diamond

IFA Jay Capital Advisory Company Limited SET The Stock Exchange of Thailand SEC The Securities and Exchange Commission Notification of the Acquisition or Disposition Notification of Capital Market