"Despite seasonal catastrophe losses, every segment of our business performed well. As a result, during the first nine months of our second year of operation, we have exceeded our annualized return on average equity objective of 14-to-15 percent," said Kenneth LeStrange, chief executive officer for Endurance.

"Our broad-based strategy continues to show success," he said. "During the third quarter, growth from our U.S. operations and casualty lines accelerated, allowing us to benefit from the operating platform which we have assembled."

Endurance offers a variety of property-casualty coverage through its subsidiaries in Bermuda, the U.K. and the United States, with an emphasis on catastrophe policies.

The company's primary lines include property individual risk and casualty individual risk, while reinsurance lines include property per risk treaty reinsurance and property catastrophe reinsurance, as well as casualty treaty reinsurance.

Chicago-based Aon Corporation owned 26 percent of Endurance before its initial public offering this past March.

Founded in 2001 in the wake of the Sept. 11 terrorist attacks, the company posted a net income of $102.1 million in 2002, from $421.5 million in sales.