Ref. PDI/BK-BS-050/2019 9th August 2019 Re: Management Discussion and Analysis (MD&A) For the three-month and six-month periods ended June 30, 2019 To: President The Stock Exchange of Thailand PDI

Securities and Exchange Commission Notification of the Office of the Securities and Exchange Commission No. OrNor. 3/2544 Re: Registration of Persons Qualified to Be a Mutual Fund Supervisor

. The SEC, Thailand cannot undertake any responsibility for its accuracy, nor be held liable for any loss of damages arising from or related to its use. PAGE (Translation) 2 The Securities and Exchange

. The SEC, Thailand cannot undertake any responsibility for its accuracy, nor be held liable for any loss of damages arising from or related to its use. The Securities and Exchange Commission Notification

, Thailand cannot undertake any responsibility for its accuracy, nor be held liable for any loss of damages arising from or related to its use. The Securities and Exchange Commission Notification of the

Ref.No.IVL001/08/2019 8th August 2019 President The Stock Exchange of Thailand Subject: Acquisition of Integrated Oxides and Derivatives Businesses/ Assets Enclosure: Information concerning the Acquisition of

Market Supervisory Board No. TorLorThor. 8/2557 Re: Rules on Personnel in the Capital Market Business ____________________________ By virtue of Section 16/6 and Section 113 of the Securities and Exchange

the shares on the Stock Exchange of Thailand. The Company has consistently provided information and facts relating to the nature of the business including the operational outcome of LRT to the public

. The SEC, Thailand cannot undertake any responsibility for its accuracy, nor be held liable for any loss of damages arising from or related to its use. ---------------------- The Securities and Exchange

Exchange Commission No. Kor Thor. 21/2563 Re: Determination of Types of Operation of Person Approved to Participate in Regulatory Sandbox to Experiment and Develop Innovation in Support of Service Provision