Kenneth LeStrange, chief executive officer for the company, commented that "strong results for the quarter" provide further evidence of the success of the company's strategy, which involves "writing both casualty and property businesses, maintaining a conservative balance sheet, and identifying and delivering value-enhancing acquisitions."

Mr. LeStrange added that in the second quarter, his company experienced increasingly strong results from its casualty segments, "which benefited from selective underwriting and a continued strong pricing environment."

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.