Chubb has recorded $965.1m in net income for the first half of 2005, a 34.6% increase over its profits for the comparable period a year ago.
Net premiums written for the first half increased 3.7%, to $6.17bn.
The insurer reported an 88.9% combined ratio for the first half, compared with a 92.7% combined for the same period a year ago.
The increase in income was the result of sharply lower catastrophe losses for the first half at $41m, compared with $142m in the year-earlier period.