and Exchange Commission No. SorKhor/Nor. 37/2550 Re: Relaxation on Calculation and Announcement of Net Asset Value of Mutual Funds Investing in Equity Instruments Issued by PTT Public Company Limited By

April Songkran Festival 5. Thursday 14 April Songkran Festival 6. Friday 15 April Songkran Festival 7. Monday 2 May Substitution for National Labor Day (Sunday, May 1) 8. Thursday 5 May Coronation Day 9

to social sustainability management in the business operational process, which includes respect for human rights throughout the value chain, for example, fair labor treatments, responsible production

staff and that of each core business. In case of material change in the number of staff or a substantial labor dispute during the past three years, clarify the causes and policies on such matter. In

guideline above. 10.5 Personnel: specify the total number of the Company’s staff and that of each core business. In case of material change in the number of staff or a substantial labor dispute during the