Ace has posted $573m in net income for the second quarter.
This represents a 31% increase for the Bermuda-based insurer on the same period in 2005.
The insurer's combined ratio for its property and casualty business was 88%, while property and casualty net written premiums increased by 6%. Total investment income is expected to be around $1.5bn.
Evan Greenberg, Ace's president and chief executive, commented: "This was another excellent quarter for ACE, marked by both record net and operating income.”
He added: “Our premium growth in the quarter reflects current market conditions globally, which in all remain favourable but mixed.
"We have a broad geographic and product reach and take a balanced approach to our business – capitalizing on opportunities when they make economic sense and walking away from business when it does not.
"For six months, our annualized ROE was 18%, which reflects an efficient use of capital.”