Since all insurance laws and regulations are established individually by the state, the National Association of Insurance Commissioners (NAIC) was organized to coordinate standards and regulations nationwide. Unless a company receives an exemption from filing, the NAIC requires all members to file audited financial statements. The insurance database powered by Audit Analytics contains records dating back to 2010 and covers all NAIC-filing insurance companies. In 2021, 209 firms conducted audits of 3,981 insurance companies.

In this analysis, Audit Analytics takes a closer look at the audit firm market share of insurance companies broken down by different business lines.