-1- AIT (VP-SEC) 022E/2022 August 11, 2022 Subject: Management's Discussion and Analysis of Operating Results for Q2-2022 To: The President of the Stock Exchange of Thailand Summary of Operations Q1

- 1 - AIT (VP-SEC) 005E/2019 February 13, 2020 Subject: Management's Discussion and Analysis of Operating Results for the year 2019 and Q4-2019 To: The President of the Stock Exchange of Thailand

(“O2O”) solutions through the talk-of-the-town ‘Station Sponsorship’ campaigns on 11 stations of the BTS Skytrain network. The innovation campaign has been unlocking the value of offline and online

1 Translation CEN 025-2017 November 13, 2017 Subject : Management Discussion and Analysis for business operation of quarter 3/2017 To The Manager and President The Stock Exchange of Thailand For 3

MDE01_2017_12Jan2018 Final (Translation) No. 01/2018 January 12, 2018 President The Stock Exchange of Thailand Re: Notification of the Resolution of the Board of Directors’ Meeting No. 1/2018 We

Translation CEN 003-2018 February 23, 2018 Subject : Management Discussion and Analysis for business operation of year 2017 To : The Manager and President The Stock Exchange of Thailand Business

1 Translation CEN 004-2019 February 27, 2019 Subject Management Discussion, analysis and business operation of year 2018 To The Manager and President The Stock Exchange of Thailand Yearly business

1 Translation CEN 012-2019 May 14, 2019 Subject Management discussion and analysis for business operation Quarter 1-2019 To The Manager and President The Stock Exchange of Thailand For 3 months

Translation CEN 034-2018 November 13, 2018 Subject : Management Discussion and Analysis for quarter 3-2018 To : The Manager and President The Stock Exchange of Thailand Business operation for 3

1 -Translation- Ref :IR 62/023 December 23, 2019 Subject: Change in Shareholding Structure of Subsidiary Company (edit no.2 ) To: President, The Stock Exchange of Thailand T.K.S. Technologies Public