| Ohio Coatings Company OH | Manufacturing | 0 | — | A |
| OHIO CONFERENCE OF SEVENTH-DAY ADVENTISTS OH | Other Services | 3 | $61,729 | — |
| Ohio County Coal Company WV | — | 0 | — | — |
| Ohio County Coal Company & Bluegrass Office Grand Eagle Mining Preparation Plant KY | — | 0 | — | — |
| Ohio County Healthcare KY | Healthcare & Social Assistance | 0 | — | B |
| Ohio Department of Developmental Disabilities (DODD) OH | — | 0 | — | — |
| Ohio Dominican University OH | Educational Services | 0 | — | A |
| OHIO DRILL AND TOOL COMPANY OH | Manufacturing | 0 | — | F |
| Ohio Eagle Distributing, LLC OH | Wholesale Trade | 0 | — | B |
| Ohio Eastern Star Home OH | Healthcare & Social Assistance | 0 | — | F |
| Ohio Edison Company OH | Utilities | 0 | — | F |
| Ohio Excavating and Sewer Contractors Corp. OH | Construction | 0 | — | A |
| Ohio Fabricators Company Inc OH | Professional & Technical Services | 1 | $71,240 | F |
| Ohio Farmers Insurance Company OH | Finance & Insurance | 15 | $126,142 | — |
| Ohio Farms Packing CO LLC OH | Manufacturing | 0 | — | F |
| Ohio Food Management Gropu LLC OH | Retail Trade | 0 | — | C |
| Ohio Forest Products, LLC OH | Manufacturing | 0 | — | F |
| Ohio Galvanizing Corp OH | Manufacturing | 0 | — | A |
| Ohio Gasket and Shim OH | Manufacturing | 0 | — | A |
| Ohio Gratings Inc OH | Manufacturing | 0 | — | F |
| Ohio Gratings Inc. PA | Manufacturing | 0 | — | F |
| Ohio Gratings Inc. TX | Manufacturing | 0 | — | F |
| Ohio Heating & Refrigeration OH | Construction | 0 | — | F |
| Ohio Hickory Harvest Brand Product Inc. OH | Manufacturing | 0 | — | F |
| Ohio Hydraulics, Inc. OH | Manufacturing | 0 | — | F |
| Ohio Intermodal Services LLC OH | Transportation & Warehousing | 0 | — | D |
| Ohio Living OH | Healthcare & Social Assistance | 0 | — | D |
| Ohio Lumex Co., Inc. OH | Manufacturing | 0 | — | A |
| Ohio Machinery Co. OH | Wholesale Trade | 0 | — | A |
| Ohio Machinery Company KY | Wholesale Trade | 0 | — | A |
| Ohio Machinery Company DBA Ohio CAT KY | Wholesale Trade | 0 | — | A |
| Ohio Machinery Company DBA Ohio CAT OH | Wholesale Trade | 0 | — | A |
| Ohio Magnetics Inc. OH | Manufacturing | 0 | — | A |
| Ohio Medical Transportation, Inc. OH | Healthcare & Social Assistance | 0 | — | F |
| Ohio Metal Technologies, Inc. OH | Manufacturing | 0 | — | F |
| OHIO MOULDING CORP. AZ | Manufacturing | 0 | — | A |
| OHIO MOULDING CORPORATION OH | Manufacturing | 0 | — | F |
| Ohio Mulch Supply OH | Manufacturing | 0 | — | D |
| OHIO NORTHERN UNIVERSITY OH | Educational Services | 2 | $67,500 | — |
| Ohio Ordnance Works Inc. OH | Manufacturing | 0 | — | D |
| Ohio Orthopedic Surgery Institute OH | Healthcare & Social Assistance | 0 | — | A |
| Ohio Paper Tube Co OH | Manufacturing | 0 | — | A |
| Ohio Patient Access LLC OH | Retail Trade | 0 | — | A |
| Ohio Pet Foods dba BNG Phoebe WI | Manufacturing | 0 | — | A |
| Ohio Pet Foods, Inc. OH | Manufacturing | 0 | — | F |
| Ohio Pets Foods, Inc. OH | Manufacturing | 0 | — | D |
| Ohio Precision Molding, Inc. OH | Manufacturing | 0 | — | F |
| Ohio Public Employees Retirement System OH | Finance & Insurance | 1 | $88,962 | — |
| Ohio Recovery Center OH | — | 0 | — | — |
| Ohio Retail Security & Mainstreet Maint. FL | — | 0 | — | — |
