449 listed firms or 82.45 per cent of the total in the Stock Exchange of Thailand (SET) posted a combined net profit of Bt286 billion for the first quarter, up 0.30 per cent from the same period last year, according to a SET statement yesterday.

Their total revenue amounted to Bt2.83 trillion in the first quarter, up 5.61 per cent from the same period of last year. They also recorded debt-to-equity ratio 1.15 time compared with 1.17 time for the same period last year.