YONG THAI PUBLIC COMPANY LIMITED 633/14 Sathupradit Road, Yannawa, Bangkok 10120 Thailand Tel. (662) 2943364-8, Fax : (662) 2943373 YTC 31/2017 November 13, 2017 To : The President The Stock Exchange

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invested or held equity instruments issued by PTT Public Company Limited: (1) mutual fund excluding ETF; (2) provident fund. Clause 2. In case where the Stock Exchange of Thailand issues a temporary trading

Securities and Exchange Commission   Sor Thor. 15/2558 Rules in Detail related to Proprietary Trading of Intermediaries 07/04/2015 16/05/2015    Contact The Securities and Exchange Commission, Thailand 333/3

according to the notification governing derivatives trading and providing of derivatives services by the securities company issued by virtue of the Securities and Exchange Act B.E. 2535 (1992) and such