The National Association of Insurance Commissioners (NAIC) has released their annual review of insurance groups and companies ranked by their direct premiums written and earned and their market share. Among this report is NAIC's 2018 ranking of private passenger auto insurance carriers. Collectively, the top 25 carriers in private passenger auto amassed nearly $246 billion in direct premiums written in 2018, up from $231 billion in 2017. The top 15 carriers in private passenger auto are ranked in the slideshow above along with totals of their direct premiums written, earned and their market share. Related: Top 25 groups, companies for homeowners' multiple peril in 2018: NAIC