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

661 6664-5 www.indoramaventures.com Ref.No.IVL001/10/2020 26th October 2020 President The Stock Exchange of Thailand Subject: Entering into a new Joint Venture Agreement with Toyobo Co., Ltd in Thailand

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

(Translation) LEE 12/2019 11 November 2019 Subject : Management Discussion and Analysis for the third quarter ended September 30, 2019 To : President of The Stock Exchange of Thailand We submit

Our Ref: APURE 027/2020 13 August 2020 Subject Clarification on Second Quarter’s Operating Performance (2/2020) Attn. To President The Stock Exchange of Thailand The company clarifies causes and

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

ACC6505/003 May 13, 2022 Subject: Clarification of operating results for the first quarter of 2022 ended March 31, 2022 Dear Directors and Managers Stock Exchange of Thailand According to Advanced

Page 1 of 1 ACC6508/001 August 11, 2022 Subject: Clarification of operating results for the second quarter of 2022 ended June 30, 2022 Dear Directors and Managers Stock Exchange of Thailand According