Who writes workers' compensation in Ohio
Top insurer groups from the NAIC market share report; the state's list carries no lines of authority.
Ohio Bureau of Workers' Compensation wrote the most workers' compensation in Ohio in 2025, $1.21B and 97.6% of the state's premium; the top five groups hold 99%. Ohio's company list doesn't say which lines each company is licensed for, so the ranking below is the NAIC's top 10 groups; every licensed company is on the Ohio page.
By Sam Alishahi, independent insurance broker · All lines in Ohio
Method and source
Source: the Ohio Department of Insurance company list, read 2026-10-17. Ohio's authorized list carries a company type code; the department publishes no surplus lines list (eligibility follows the home state and the NAIC Quarterly Listing). "Premium" is direct premium written in the state for the year shown; "share" is that company's part of the state total for the line. A company can be licensed for a line and write none of it, and a surplus lines insurer can write a line without a state license for it.
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