Companies in Ohio
2.3M companies registered in Ohio, sourced from official business registers and enriched with industry, size, location and contact data. Below: the largest companies by reported revenue, and how the Ohio business base breaks down by industry and headcount.
Part of the United States company directory.
Rankings
Largest companies in Ohio
By reported (actual) revenue, updated September 2026. Public-sector entities are excluded.
| # | Company | Industry | City | Revenue (USD) | Employees |
|---|---|---|---|---|---|
| 1 | Cardinal Health, Inc. | Wholesale of pharmaceutical goods | Dublin | $222.6B | 57,700 |
| 2 | The Kroger Co | Retail sale in non-specialised stores with food, beverages or tobacco predominating | Cincinnati | $147.6B | 403,000 |
| 3 | Marathon Petroleum Corporation | Manufacture of refined petroleum products | Findlay | $135.2B | 18,300 |
| 4 | The Procter & Gamble Company | Manufacture of perfumes and toilet preparations | Cincinnati | $84.3B | 109,012 |
| 5 | General Electric Company | Manufacture of instruments and appliances for measuring, testing and navigation | Cincinnati | $45.9B | 57,000 |
| 6 | U.S. Bank National Association | Other monetary intermediation | Cincinnati | $41.8B | 67,587 |
| 7 | The Sherwin-Williams Company | Manufacture of paints, varnishes and similar coatings, printing ink and mastics | Cleveland | $23.6B | 64,249 |
| 8 | American Electric Power Company, Inc. | Electric power generation, transmission and distribution | Columbus | $21.9B | 6,994 |
| 9 | Parker-Hannifin Corporation | Manufacture of other pumps and compressors | Cleveland | $19.9B | 65,650 |
| 10 | Cleveland-Cliffs Inc. | Manufacture of basic iron and steel and of ferro-alloys | Cleveland | $18.6B | 25,000 |
| 11 | Nationwide Mutual Insurance Company | Non-life insurance | Columbus | $18.3B | 34,417 |
| 12 | The Goodyear Tire & Rubber Company | Manufacture of rubber tyres and tubes; retreading and rebuilding of rubber tyres | Akron | $18.3B | 63,000 |
| 13 | The Cleveland Clinic Foundation | Hospital activities | Cleveland | $18.3B | 44,000 |
| 14 | Firstenergy Corp. | Electric power generation, transmission and distribution | Akron | $15.1B | 11,186 |
| 15 | Fifth Third Bank, National Association | Other monetary intermediation | Cincinnati | $13.3B | 18,603 |
| 16 | Mplx LP | Transport via pipeline | Findlay | $13B | 5,762 |
| 17 | Fifth Third Bancorp | Other monetary intermediation | Cincinnati | $12.9B | 18,676 |
| 18 | Cincinnati Financial Corporation | Life insurance | Fairfield | $12.6B | 5,705 |
| 19 | Huntington Bancshares Incorporated | Other monetary intermediation | Columbus | $12.5B | 20,424 |
| 20 | Battelle Memorial Institute Inc | Research and experimental development on biotechnology | Columbus | $12.5B | 7,457 |
| 21 | Progressive Direct Insurance Company | Non-life insurance | Cleveland | $11.9B | 10 |
| 22 | Bon Secours Mercy Health, Inc. | Hospital activities | Blue Ash | $11.5B | 19,000 |
| 23 | Keycorp | Other monetary intermediation | Cleveland | $11.2B | 17,883 |
| 24 | The Andersons Inc | Support activities for crop production | Maumee | $11B | 2,137 |
| 25 | Travelcenters of America Inc. | Retail sale of automotive fuel in specialised stores | Westlake | $10.8B | 18,500 |
Top 25 by revenue reported to the register. Companies filing no revenue figure are not ranked, whatever their size.
Cardinal Health, Inc. leads Ohio at $222.6B in reported revenue, from Dublin.
Coverage
Companies by industry in Ohio
The industries holding the most companies, by NACE activity code.
Ranked by number of companies. Each record carries its NACE code alongside SIC and NAICS, so the same segment can be pulled in any of the three schemes.
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Other business support service activities n.e.c. is the largest activity in Ohio, with 133,376 companies.
Distribution
Company size
By number of employees.
29,857 companies have no disclosed headcount (excluded from the chart).
90% of Ohio companies with a disclosed headcount fall in the 1-4 employee band.
Data coverage
What a Ohio record carries
Share of the state's companies holding each contact field.
21%
with a website
39%
with a phone number
14%
with an email address
Counted against the 2.3M companies in Ohio. Firmographics — industry, size, address, status — are present on every record.
FAQ
Companies in Ohio — frequently asked questions
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