The top 25 private passenger auto insurers in the U.S. gained market share in 2016. Change in rank of top 10.
Since 2000, the largest private passenger automobile insurers in the U.S. have been steadily growing their combined market share and more than half of all private passenger auto insurance in the United States is handled by just five companies. The top 25 companies account for more than $4 out of every $5 in auto insurance premiums for the entire market, over 85 percent overall.
According to the final 2016 market share report from the National Association of Insurance Commissioners