* Note Please find further information in the consolidated financial statements. 1 7th August, 2018 Subject: Management Discussion & Analysis (MD&A) for the 2nd quarter of 2018 Attention: The

* Note Please find further information in the consolidated financial statements. 1 13th November, 2018 Subject: Management Discussion & Analysis (MD&A) for the 3rd quarter of 2018 Attention: The

* Note Please find further information in the consolidated financial statements. 1 12th November, 2019 Subject: Management Discussion & Analysis (MD&A) for the 3rd quarter of 2019 Attention: The

* Note Please find further information in the consolidated financial statements. 1 May 13th, 2020 Subject: Management Discussion & Analysis (MD&A) for the 1st quarter of 2020 Attention: The President

Exchange Commission No. KorThor. 43/2543 Re: Rules, Conditions and Procedures for Dealing of Debt Securities By virtue of Section 14 and Section 114 of the Securities and Exchange Act B.E. 2535 (1992), the

of Finance Chairman of the Securities and Exchange Commission Note: Notification of the Securities and Exchange Commission No. KorThor. 43/2543 Re: Rules, Conditions and Procedures for Dealing of Debt

Securities and Exchange Commission Note: Notification of the Securities and Exchange Commission No. KorThor. 43/2543 Re: Rules, Conditions and Procedures for Dealing of Debt Securities dated 26/09/2000

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* Note Please find further information in the consolidated financial statements. 1 23 February, 2018 Subject: Management Discussion & Analysis (MD&A) for the year 2017 Attention: The President The

translation is strictly for reference. Notification of the Capital Market Supervisory Board No. Tor Jor. 10/2556 Re: Submission of the Registration Statement for an Offer for Sale of Debt Securities