Who are the Largests auto insurers in US?

The largest auto insurers in the US are generally considered to be these companies, though their precise ranking can fluctuate slightly depending on the source and metrics used (premium volume, market share, etc.):

* State Farm: Consistently ranks as the largest.

* Geico: Usually a very close second to State Farm.

* Progressive: Regularly holds a top-three position.

* Allstate: Another major player consistently among the top insurers.

* Liberty Mutual: Frequently rounds out the top five.

It's important to note that other large insurers exist, and their relative ranking can shift year to year. These five, however, are almost always considered the biggest in the US auto insurance market.