The National Association of Insurance Commissioners has ranked the top 25 property and casualty insurance companies and groups by market share of direct premiums written for 2015.

Direct premiums written among the top 25 providers totaled $588 billion, compared with $569 billion in 2014. The top 10 providers accounted for 45.63% of 2015 direct premiums written.

The names in the top 10 P&C carriers remained the same as 2014, but with generally incremental movement up or down in the rankings. The most notable change was Liberty Mutual's drop to fourth place from second.

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Rosalie Donlon

Rosalie Donlon is the editor in chief of ALM's insurance and tax publications, including NU Property & Casualty magazine and NU PropertyCasualty360.com. You can contact her at [email protected].