The 2023 market share data for property and casualty insurers is in, released in March 2024 by the National Association of Insurance Commissioners (NAIC). The NAIC report, which includes 98.01% of P&C filings for the year as of March 18, distinguishes the leading insurance companies across all lines and features the top 25 groups, 10 of which are listed in the slideshow above.

The report notes the top 10 P&C carriers show a cumulative market share of 48.07%. In total, insurers across all lines wrote $960,802,932,489 in direct premiums in 2023. Earlier data released on March 4 reported total private passenger auto insurance providers held 33% of all written premiums, amounting to $314,788,570,644.

These annual NAIC reports include cumulative data gleaned from P&C filings from commercial auto, personal auto, homeowners, workers' comp, medical professional liability, and other liability insurance companies, except for auto liability.

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Ashley Hattle-Cleminshaw

Ashley Hattle-Cleminshaw serves as ALM's PropertyCasualty360 Senior Editor. She brings 10 years of experience in journalism and communications to the editorial team. Reach her by sending an e-mail to [email protected].