No. INGRS059 14 September 2020 Subject : Management Discussion & Analysis (MD&A) for the consolidated financial statements of the 2nd quarter ended 31 July 2020 To : The President The Stock Exchange

Attention: President The Stock Exchange of Thailand CH. Karnchang Public Company Limited (“the Company”) and its subsidiaries would like to clarify the consolidated operating result and financial position for

(Ending September 30, 2019) To Director and Manager of the Stock Exchange of Thailand Ubis (Asia) Public Company Limited (“the Company”) would like to clarify on the performance and the financial for Q3

No. ADD-IR2021/001 19 May 2021 Subject: Management discussion and analysis for the performance for the three-month period ended 31 March 2021 To: President The Stock Exchange of Thailand AddTech Hub

Bangkok, March 10, 2014 ? The SEC jointly with the Association of Investment Management Companies (AIMC), the Stock Exchange of Thailand (SET), the Thai Bankers? Association (TBA), the Association 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

60 6 Variable Costs (472) (13) (468) (9) (4) 1 (485) (11) 13 (3) Fixed Costs (138) (4) (130) (3) (8) 6 (130) (3) (8) 6 Stock Gain/(Loss) (57) (2) (161) (3) 104 (65) (149) (4) 92 (62) SG&A (73) (2) (72

Ref. DBP. 068 / 2018 May 14, 2018 Subject : Clarification on operating results for the 1st Quarter ending March 31, 2018 To : President The Stock Exchange of Thailand Diamond Building Products Public

. Other derivatives liabilities 18. Provision 19. Other liabilities Total liabilities Shareholders’ equity 20. Share capital 20.1 Authorized share capital 20.2 Issued and paid-up share capital 21. Stock

Issued and paid-up share capital 21. Stock rights and warrants 22. Additional paid-in capital (discount on capital stock)) 23. Appraisal surplus 24. revaluation surplus (deficit) in investments) 25