A look at the shifts in market share courtesy of CAR
The following are the latest movements and trends in the market share of the top ten private passenger automobile insurance companies in Massachusetts. The aim is to provide a snapshot of what is happening in the market along with a review of the overall shifts and trends that are happening within the private passenger automobile marketplace. The data is provided courtesy of the Commonwealth Automobile Reinsurers, the statistical agent for motor vehicle insurance in the Commonwealth of Massachusetts.
A look at the market share of the top 20 private passenger automobile insurers
Here is a look at the data on policy exposures statistically reported through April 2015; the most recent month for data available.
| Company Name | Exposures | Market Share |
| Commerce | 519,566 | 25.94% |
| Liberty Mutual | 234,258 | 11.69% |
| Safety | 217,382 | 10.85% |
| Arbella | 198,642 | 9.92% |
| GEICO | 130,145 | 6.50% |
| Plymouth Rock | 117,430 | 5.86% |
| Metropolitan | 84,713 | 4.23% |
| Hanover | 64,170 | 3.20% |
| Amica Mutual | 64,012 | 3.20% |
| Progressive | 58,808 | 2.94% |
| USAA | 58,665 | 2.93% |
| The Premier | 49,942 | 2.49% |
| Quincy Mutual | 37,688 | 1.88% |
| Allstate | 32,970 | 1.65% |
| Norfolk and Dedham Mutual | 24,075 | 1.20% |
| Vermont Mutual | 19,408 | 0.97% |
| National Grange | 18,413 | 0.92% |
| Encompass | 12,337 | 0.62% |
| Occidental Insurance | 8,336 | 0.42% |
| Preferred Mutual | 7,996 | 0.40% |
| State Farm | 7,537 | 0.38% |
| Mass Homeland | 6,419 | 0.32% |
| Esurance | 5,838 | 0.29% |
| Electric | 5,744 | 0.29% |
| IDS | 5,719 | 0.29% |
| Green Mountain | 4,675 | 0.23% |
| Farm Family | 3,188 | 0.16% |
| Harleysville Worcester | 1,916 | 0.10% |
| American Auto | 1,493 | 0.07% |
| American International | 1,072 | 0.05% |
| Bankers Standard | 699 | 0.03% |
A look at the market share for the top 10 companies writing private passenger auto in Massachusetts
Compare above with the top ten private passenger auto insurance companies in Massachusetts a decade ago (May 2005)
