A look at the shifts in market share as of December 2016 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 data provided for this updated is from September 2016, the latest date for which complete data is available. This will be our third look this year at the latest data on the current state of the private passenger automobile insurance marketplace in Massachusetts.
Our 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 in the Commonwealth.
All data presented here is provided courtesy of the Commonwealth Automobile Reinsurers, the statistical agent for motor vehicle insurance in the Commonwealth of Massachusetts.
Graphs from 2016, 2011, and 2006 show how the market has changed
Below the listing of the top 20 carriers by market share in 2016, followed by graphs showing the top ten writers by market share. In order to give some perspective of the shifts in the marketplace over the past decade, we have include similar graphs from both 2011 and 2006 to see how the Massachusetts automobile insurance market has shifted during the past five and ten years which of includes the transition into “Managed Competition.”
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 June 2016; the most recent month for data available.
| Company Name | Exposures | Market Share |
| 1. Commerce | 928,334 | 25.87% |
| 2. Liberty Mutual | 396,353 | 11.04% |
| 3. Safety | 357,509 | 9.96% |
| 4. Arbella | 334,122 | 9.31% |
| 5. GEICO | 309,535 | 8.62% |
| 6. Plymouth Rock | 213,276 | 5.94% |
| 7. Metropolitan | 149,819 | 4.17% |
| 8. Amica Mutual | 123,144 | 3.43% |
| 9. Hanover | 113,422 | 3.16% |
| 10. USAA | 109,075 | 3.04% |
| 11. Progressive | 106,322 | 2.96% |
| 12. The Premier | 91,845 | 2.56% |
| 13. Quincy Mutual | 61,636 | 1.72% |
| 14. Allstate | 47,119 | 1.31% |
| 15. Norfolk & Dedham Mutual | 42,299 | 1.18% |
| 16. Vermont Mutual | 37,262 | 1.04% |
| 17. National Grange | 36,588 | 1.02% |
| 18. Preferred Mutual | 17,241 | 0.48% |
| 19. State Farm | 16,201 | 0.45% |
| 20. Encompass | 15,982 | 0.45% |
A graphic comparison of the market share for the top 10 companies writing private passenger auto in Massachusetts
The biggest change noted in the following charts, is the increase in market share that Progressive has experienced over the past year. Note that in June 2015 it did not make up a part of the Top Ten market share, whereas in 2016 it does.
September 2016
Now compare that to the same date five years ago or in September 2011:
September 2011
The top 10 private passenger auto insurance companies in Massachusetts a decade ago (2006)
Here is a look at the final top ten list from 2006. It is interesting to note that a majority of the top ten private passenger auto insurers that were in the top 10 a decade ago continue to dominate the market in 2016.
