Warren Buffett's Berkshire Hathaway, led by the group's auto-insurance subsidiary Geico, leapt over Allstate in 2012 to become the second-largest P&C insurance group based on net premiums written, according to data from SNL Financial.
Lists of the Top 100 insurance groups and insurance companies, based on total net premiums written, will be published in the July edition of PropertyCasualty360-National Underwriter magazine.
The Berkshire group saw a 2012 increase in NPW of 12.1 percent—the largest such growth in the Top 20 P&C insurance groups. Berkshire's NPW was about $27.25 billion.
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