Largest Home Insurance Companies in the US, Ranked by Market Share
The biggest US homeowners insurance companies ranked by NAIC-reported market share and direct written premium -- the actual size of each carrier's book of business, not a marketing claim.
Research period:
What this ranks: NAIC-reported market share, the size of each carrier's written homeowners premium, not price, service quality, complaint record, or which insurer is right for you. See PlainInsurer's complaint and denial-rate rankings for those dimensions, and compare quotes directly before you buy.
Research question
Among the 125 largest US homeowners insurers by NAIC-reported market share, what share of total direct written premium is concentrated in the top 10, and what is the absolute gap between the largest and the tenth-largest insurer?
Methodology
This ranking reflects the 10 largest homeowners insurers by market share, drawn from the NAIC 2024 Market Share Report for Property/Casualty Groups and Companies. Records are ranked by direct written premium in the Homeowners Multiple Peril line (rank, highest first) and the top 10 of 125 rated companies are shown. Every figure updates automatically as new NAIC filings are processed; nothing on this page is hand-entered.
Coverage and exclusions: NAIC occasionally suppresses values for confidentiality, small sample size, or quality control, and suppressed rows are excluded from this ranking rather than shown as zero. If NAIC later revises a figure, the revised value replaces the old one automatically the next time the portal's data is refreshed.
Data provenance: NAIC publishes the Market Share Report on its own release schedule -- the 2024 report (covering calendar-year-2024 premiums) was published in June 2025. We pull each release as it becomes available and normalize it into our database via a documented, re-runnable extraction script; a later release simply supersedes the one before it, so readers never see a mix of old and new figures on the same page.
Comparability across years: when NAIC revises its release schedule, definitions, or coverage, we note the affected years on the methodology page so readers can compare like-with-like rather than across a changed measurement.
Editorial governance: PlainInsurer publishes its editorial policy and corrections process. If an insurer disputes a figure attributed to it, the correction is checked against the official NAIC record before any change is made.
Every number on this page can be traced back to its NAIC source by following the citation below, so independent verification never requires anything beyond the original public source. See the methodology page for the complete ETL pipeline, source vintage, and column lineage.
Largest homeowners insurers by market share
Live data: reflects the current NAIC 2024 Market Share Report snapshot
The ranked top 10
Every row below reflects the current 10-company dataset out of 125 rated homeowners insurers. Reload the page after new NAIC data is processed to see the latest values.
| # | Rank | Homeowners insurer | Market share % | Direct written premium |
|---|---|---|---|---|
| 1 | 1 | State Farm Group | 18.2% | $31.46B |
| 2 | 2 | Allstate Insurance Group | 8.9% | $15.49B |
| 3 | 3 | United Services Automobile Association Group | 6.9% | $11.90B |
| 4 | 4 | Liberty Mutual Group | 6.1% | $10.61B |
| 5 | 5 | Farmers Insurance Group | 5.5% | $9.52B |
| 6 | 6 | American Family Insurance Group | 5.0% | $8.62B |
| 7 | 7 | Travelers Group | 4.7% | $8.15B |
| 8 | 8 | Chubb Ltd. Group | 2.5% | $4.39B |
| 9 | 9 | Nationwide Corp. Group | 2.1% | $3.73B |
| 10 | 10 | Auto Owners Group | 2.0% | $3.44B |
Source: National Association of Insurance Commissioners, NAIC 2024 Market Share Report for Property/Casualty Groups and Companies. Values reflect the current dataset, refreshed as new NAIC filings are processed. National Association of Insurance Commissioners, NAIC 2024 Market Share Report for Property/Casualty Groups and Companies. Values reflect the current dataset, refreshed as new NAIC filings are processed.
Findings
Top entity in the ranking
The top-ranked record in this dataset is State Farm Group, with a market share of 18.2% and direct written premium of $31.46B. The full top-10 set is rendered in the table above. When National Association of Insurance Commissioners publishes a revision, the ranking and the prose around it update automatically.
Distribution shape
The gap between the top-ranked record (18.2%) and the 10th-ranked record (2.0%) characterizes how concentrated the top of the distribution is. The top 10 companies together hold roughly 62.0% of the national homeowners market, out of 125 rated companies total. Where the top value is many multiples of the tenth-ranked value, the population is highly concentrated -- a small number of carriers accumulate the bulk of the premium written. The full distribution beyond this top-10 cut is summarized in the aggregate context section below.
Aggregate context
Across the full 125-company population behind this ranking, total direct written premium sums to $167.72B and total market share sums to 96.8% (the remainder reflects carriers below the rated cutoff). The methodology page documents the exact filter applied (records with null or zero values on the ranking metric are excluded). This aggregate row is computed from the same dataset that powers the ranking above.
Source provenance
The records in this ranking originate from National Association of Insurance Commissioners, specifically the NAIC 2024 Market Share Report for Property/Casualty Groups and Companies. Plaininsurer ingests the source vintage published by the agency and keeps this page current, there is no static export carrying stale numbers, and a newly published dataset is reflected here within hours. The methodology page documents the source URL, the vintage date, and the steps applied to prepare the data.
Why this ranking matters
Rankings like this one let a reader scan a population quickly and identify outliers, concentrations, and patterns that warrant deeper investigation. The methodology page explains how a carrier earns inclusion in the dataset and how the ranking column is computed at the source. Readers deciding between homeowners carriers should pair this size ranking with PlainInsurer's complaint-ratio rankings -- market share measures scale, not service quality.
What this analysis cannot tell us
NAIC market-share figures reflect direct written premium for the Homeowners Multiple Peril line only -- other residential lines (dwelling fire, mobile home, flood, which is federally underwritten via the NFIP) are reported separately and not included here. Companies belonging to the same insurance group may file under separate NAIC company codes; the ranking aggregates to the group level where NAIC's own rollup records that relationship, but a group's true consolidated share can differ where the relationship isn't recorded. Market share is computed from NAIC Annual Statement filings for the displayed data year (2024, published June 2025) and lags current market conditions -- 2025 catastrophe losses or carrier exits are not reflected. State-level rate adequacy, claims-paying ability, and complaint history are not captured by national market share; consumers should consult PlainInsurer's complaint and denial-rate rankings and their state insurance commissioner for those dimensions.
Secondary cut from the same source
Loss ratio (claims paid / premium earned) for the top 10 homeowners insurers
Sources
- NAIC Annual Statement Database - https://content.naic.org
- NAIC 2024 Market Share Report for Property/Casualty Groups and Companies - https://content.naic.org/sites/default/files/publication-msr-pb-property-casualty.pdf