Allstate Northbrook Ind Co
California Private Passenger Auto Physical Damage (line 21.1) — 2025
5.40% of the California Private Passenger Auto Physical Damage market in 2025 — rank #6
Market-share indicators
Direct written premium is RECORDED (CA DOI verbatim). Market share % and rank are AGGREGATED (Atlas Commons computations over CA DOI data — not CA DOI-published figures). Loss ratio is AGGREGATED (Atlas Commons).
| Metric | Value | Warrant |
|---|---|---|
| Direct written premium | $1,213,498,377 | RECORDED |
| Market share (% of line DWP) | 5.40% | AGGREGATED |
| Rank by DWP (within line×year) | #6 | AGGREGATED |
| Loss ratio | 48.70% | AGGREGATED |
| Line of business | Private Passenger Auto Physical Damage (line 21.1) | RECORDED |
| Year | 2025 | RECORDED |
| Licensed in CA | Yes | RECORDED |
| NAIC COCODE | 36455 | RECORDED |
| Group | ALLSTATE INS GRP | RECORDED |
Frequently asked questions
- What is Allstate Northbrook Ind Co's California market share for Private Passenger Auto Physical Damage in 2025?
- Allstate Northbrook Ind Co (NAIC COCODE 36455) holds 5.40% of the California Private Passenger Auto Physical Damage market by direct written premium in 2025, ranking #6 among all carriers. Direct written premium was $1,213,498,377. Source: CA DOI P&C Market Share Report 2025.
- How much did Allstate Northbrook Ind Co write in California Private Passenger Auto Physical Damage premiums in 2025?
- The California DOI P&C Market Share Report records $1,213,498,377 in direct written premiums for Allstate Northbrook Ind Co (COCODE 36455) for Private Passenger Auto Physical Damage in 2025. This is a verbatim CA DOI figure.
- What is Allstate Northbrook Ind Co's California loss ratio for Private Passenger Auto Physical Damage (2025)?
- Atlas Commons computes Allstate Northbrook Ind Co's California loss ratio for Private Passenger Auto Physical Damage in 2025 as 48.70%, using CA DOI direct losses incurred and direct premiums earned. A ratio below 100% means the carrier paid out less in claims than it earned; above 100% means more. This is an Atlas Commons computation — the CA DOI does not publish this figure.
What this is — and isn't
Direct written premium is RECORDED verbatim from the California DOI P&C Market Share Report. Market share percentage and rank are AGGREGATED by Atlas Commons over that data — they are not CA DOI-published figures. Loss ratio, if shown, is an Atlas Commons computation (direct losses / direct earned premiums); the CA DOI publishes the components, not this ratio.
This page is informational only. A higher market share means more California premium volume — not better service, lower risk, or a recommendation to buy. The loss ratio is a single-line, single-year figure; product mix, catastrophe exposure, and reserve differences all affect it. To verify a carrier's California license, use the CA DOI License Search . For complaint history, use the CA DOI Consumer Complaint Study .
Source: California Department of Insurance P&C Market Share Report 2025. CC0.
Structured facts: /coverage/market-share/ca/36455-ppa-phys-2025.jsonld