Our Ref: APURE 025/2023 15 August 2023 Subject Clarification on Second Quarter’s Operating Performance (2/2023) Attn. To The Director and President of the Stock Exchange of Thailand The company

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

% Net Profit for the company 29 63 117% 60 123 105% Gross profit margin (%) 67.0% 64.4% (2.6%) 67.4% 64.9% (2.5%) EBITDA margin (%) 23.2% 30.2% 7.0% 24.1% 30.7% 6.6% Net profit margin (%) 13.9% 20.0% 6.1

May 10, 2018 Re : Management Discussion and Analysis (MD&A) For Quarter 1 / 2018 Attn : President The Stock Exchange of Thailand Baan Rock Garden Public Company Limited wishes to clarify the Company’s

/2019 February 15 , 2019 Re: Management Discussion and Analysis (MD&A) For Year 2018 Attn: President The Stock Exchange of Thailand Baan Rock Garden Public Company Limited wishes to clarify the Company’s

November 13, 2019 Re : Management Discussion and Analysis (MD&A) For Quarter 3 / 2019 Attn : President The Stock Exchange of Thailand Baan Rock Garden Public Company Limited wishes to clarify the Company’s

1 - TRANSLATION - KT/PB (Q-Con) 001/2020 February 13, 2020. Attention Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis for year 2019 Quality Construction

/ 2020 February 21 , 2020 Re: Management Discussion and Analysis (MD&A) For Year 2019 Attn: President The Stock Exchange of Thailand Baan Rock Garden Public Company Limited wishes to clarify the Company’s

15 May 2017 Subject: Management Discussion & Analysis for Quarter 1 ending 31 March 2017 To: The President The Stock Exchange of Thailand Harn Engineering Solutions Public Company (“The Company

August 10, 2017 Re : Management Discussion and Analysis (MD&A) For Quarter 2 / 2017 Attn : President The Stock Exchange of Thailand Baan Rock Garden Public Company Limited wishes to clarify the Company’s