On Monday, and updated every day since then this week, the National Association for Insurance Commissioners (NAIC) posted listings of the top insurers in the P&C space, ranked by direct written premiums written and broken down by line of business.

Overall, with all lines taken into account, State Farm holds the top spot by nearly $25 billion, followed by Zurich Insurance Group and Liberty Mutual. State Farm stands out in two individual lines of business: Homeowners Multiple Peril, where they own 20.91 percent of the market share, and Private Passenger Auto, with a market share of 18.86 percent and double the next closest insurer, Berkshire Hathaway, in terms of premium ($32.1 billion compared to $16.75 billion).

Liberty Mutual, Travelers, The Hartford, AIG and Zurich are listed as the top five workers’ comp insurers, respectively; Travelers took the top spot in Commercial Auto followed by Progressive and Liberty Mutual; and AIG nearly doubled the next-closest insurers (Travelers and Zurich) in terms of market share in Liability lines.

Below is the full list of the top 25 property/casualty insurers when all lines are taken into account, their respective total market shares as a percent and direct written premiums in billions:

State Farm: 10.42% $53.7
Zurich Insurance Group:  5.59% $28.8
Liberty Mutual: 5.5% $28.3
AIG:  4.58% $23.6
Travelers Group:4.41% $22.7
Allstate: 4.28% $22.0
Berkshire Hathaway: 3.93% $20.2
Nationwide: 3.3% $17.0
Progressive: 3.22% $16.6
USAA:  2.58% $13.3
The Hartford: 2.08% $10.7
Chubb:  1.88% $9.7
ACE:  1.79% $9.2
CNA:  1.65% $8.5
American Family:1.11% $5.7
QBE:  1.08% $5.6
Allianz: 1.05% $5.4
Auto Owners: 1.02% $5.2
Erie:  0.90% $4.6
Assurant: 0.83% $4.3
WR Berkley: 0.78% $4.03
American Financial: 0.78% $4.02
The Hanover: 0.73% $3.8
Cincinnati Financial Grp: 0.71% $3.7
FM Global: 0.69% $3.5

Results reflect the figures posted by the NAIC as of Thursday, March 7, for the most up to date results, visit the NAIC's site and download the latest figures.

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