Royal Sundaram Alliance Insurance Company Ltd has underwritten Rs 537.68 cr of premium income during the six months period ended September 30, 2010, recording a growth of 23% over the corresponding period Gross Written Premium (GWP) of Rs 438.30 cr in the previous year. The company has also recorded a profit before tax (after pool loss) of Rs 16.75 crore while PAT stood at Rs 10.62 crore.