AC 52/07-003 ACC1/20-043 August 13, 2020 Subject: Management Discussion and Analysis Quarter 2 Ending June 30, 2020 To: The President The Stock Exchange of Thailand Qualitech Public Company Limited

AC 52/07-003 ACC1/19-055 November 11, 2019 Subject: Management Discussion and Analysis Quarter 3 Ending September 30, 2019 To: Director and Managing Director The Stock Exchange of Thailand Qualitech

Our Ref: APURE 017/2021 14 May 2021 Subject Clarification on First Quarter’s Operating Performance (1/2021) Attn. To The Director and President of the Stock Exchange of Thailand The company clarifies

Our Ref: APURE 028/2021 12 November 2021 Subject Clarification on 3rd Quarter’s Operating Performance (3/2021) Attn. To President The Stock Exchange of Thailand The company clarifies causes and

Our Ref: APURE 017/2022 13 May 2022 Subject Clarification on First Quarter’s Operating Performance (1/2022) Attn. To The Director and President of the Stock Exchange of Thailand The company clarifies

Our Ref: APURE 027/2022 14 November 2022 Subject Clarification on 3rd Quarter’s Operating Performance (3/2022) Attn. To President The Stock Exchange of Thailand The company clarifies causes and

Our Ref: APURE 028/2023 14 November 2023 Subject Clarification on 3rd Quarter’s Operating Performance (3/2023) Attn. To President The Stock Exchange of Thailand The company clarifies causes and

. (IT).With the referral from the Stock Exchange of Thailand, the SEC?s probe found that during January 31 - February 4, 2013, Pantipa, IT financial controller, had sold 374,440 IT shares through

Limited (ESTAR) for insider trading.With the referral from the Stock Exchange of Thailand, the SEC probed into the case and found that during February 24-28, 2014, Ratanachai had used another person?s

November 13, 2006 February 28, 2018 Subjects : Clarification of operating results for the Year 2017 Attention : The Director and Manager of the Stock Exchange of Thailand The Consolidated net profit