The National Association of Insurance Commissioners has ranked the top 25 private passenger auto insurance companies and groups by market share of direct premiums written for 2015.

Direct written premiums totaled $199.57 billion for the top 25, an increase from last year's $190.49 billion. The top 10 carriers accounted for 70.73% of the total direct premiums written. The top four carriers retained a stronghold on the auto insurance industry, accounting for nearly 50% of the direct premiums written.

The companies in the top 10 remained the same as 2014, and in the same order, although the total of direct premiums written and market share changed.

PC360 previously covered the top 10 P&C carriers for 2015, and the top 10 Homeowners' insurance carriers.

Continue reading to find out which companies NAIC ranked as the top 10 for the private passenger auto insurance market.

No. 10: Travelers Group

2014 Ranking: 10

Direct Premiums Written, 2015: $3.38 billion

Direct Premiums Written, 2014: $3.15 billion

2015 Market Share: 1.69%

2014 Market Share: 1.66%

2015 Cumulative Market Share: 71.12%

No. 9: American Family Insurance Group

2014 Ranking: 9

Direct Premiums Written, 2015: $3.69 billion

Direct Premiums Written, 2014: $3.53 billion

2015 Market Share: 1.85%

2014 Market Share: 1.85%

2015 Cumulative Market Share: 69.43%

No. 8: Nationwide Corp. Group

2014 Ranking: 8

Direct Premiums Written, 2015: $7.47 billion

Direct Premiums Written, 2014: $7.34 billion

2015 Market Share: 3.74%

2014 Market Share: 3.85%

2015 Cumulative Market Share: 67.58%

No. 7: Liberty Mutual Group

2014 Ranking: 7

Direct Premiums Written, 2015: $9.94 billion

Direct Premiums Written, 2014: $9.50 billion

2015 Market Share: 4.98%

2014 Market Share: 4.99%

2015 Cumulative Market Share: 63.84%

No. 6: Farmers Insurance Group

2014 Ranking: 6

Direct Premiums Written, 2015: 9.99 billion

Direct Premiums Written, 2014: 9.70 billion

2015 Market Share: 5.00%

2014 Market Share: 5.09%

2015 Cumulative Market Share: 58.85%

No. 5: United Services Automobile Association Group

2014 Ranking: 5

Direct Premiums Written, 2015: $10.56 billion

Direct Premiums Written, 2014: $9.84 billion

2015 Market Share: 5.29%

2014 Market Share: 5.17%

2015 Cumulative Market Share: 53.85%

No. 4: Progressive Group

2014 Ranking: 4

Direct Premiums Written, 2015: $17.52 billion

Direct Premiums Written, 2014: $16.57 billion

2015 Market Share: 8.78%

2014 Market Share: 8.70%

2015 Cumulative Market Share: 48.56%

No. 3: Allstate Insurance Group

2014 Ranking: 3

Direct Premiums Written, 2015: $20.04 billion

Direct Premiums Written, 2014: $19.00 billion

2015 Market Share: 10.04%

2014 Market Share: 9.97%

2015 Cumulative Market Share: 39.78%

No. 2: Berkshire Hathaway Group

2014 Ranking: 2

Direct Premiums Written, 2015: $22.81

Direct Premiums Written, 2014: $20.52 billion

2015 Market Share: 11.43%

2014 Market Share: 10.77%

2015 Cumulative Market Share: 29.74%

No. 1: State Farm Group

2014 Ranking: 1

Direct Premiums Written, 2015: $36.55 billion

Direct Premiums Written, 2014: $35.59 billion

2015 Market Share: 18.31%

2014 Market Share: 18.68%

2015 Cumulative Market Share: 18.31%

Special Reports /

Top 10 personal auto carriers for 2015, as ranked by NAIC

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