| Ohio River Laboratories, LLC OH | Professional & Technical Services | 1 | $140,000 | — |
| Ohio River Laboratories, LLC TX | Professional & Technical Services | 1 | $140,000 | — |
| Ohio River Partner Shareholders LLC PA | Mining & Extraction | 0 | — | A |
| OHIO ROTATIONAL MOLDING OH | Manufacturing | 0 | — | A |
| Ohio Screw Products, Inc. OH | Manufacturing | 0 | — | F |
| Ohio Star Forge Co OH | Manufacturing | 0 | — | F |
| Ohio State Dental Faculty Practice, Inc. OH | Healthcare & Social Assistance | 3 | $149,989 | — |
| Ohio State Pallet OH | Manufacturing | 0 | — | D |
| Ohio Steel Industries, Inc. OH | Manufacturing | 0 | — | F |
| Ohio Steel Sheet & Plate, Inc. OH | Wholesale Trade | 0 | — | A |
| Ohio Structures, Inc. OH | Manufacturing | 0 | — | F |
| Ohio Tool Works LLC OH | Manufacturing | 0 | — | F |
| Ohio Transmission Corporation AL | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation AR | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation AZ | Manufacturing | 0 | — | A |
| Ohio Transmission Corporation CO | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation CT | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation GA | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation IL | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation IN | Wholesale Trade | 0 | — | B |
| Ohio Transmission Corporation KS | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation KY | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation LA | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation MI | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation MN | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation MO | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation NC | Wholesale Trade | 0 | — | F |
| Ohio Transmission Corporation NE | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation NH | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation NM | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation OH | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation OK | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation PA | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation SC | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation TN | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation TX | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation UT | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation VA | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation WI | Wholesale Trade | 0 | — | A |
| Ohio Transmission Corporation WV | Wholesale Trade | 0 | — | A |
| Ohio Truck Sales OH | Retail Trade | 0 | — | A |
| Ohio Underground, Inc KY | Wholesale Trade | 0 | — | A |
| Ohio Underground, Inc OH | Wholesale Trade | 0 | — | A |
| Ohio Underground, Inc PA | Wholesale Trade | 0 | — | A |
| Ohio Valley - Stow OH | Wholesale Trade | 0 | — | F |
| Ohio Valley - Trafford PA | Wholesale Trade | 0 | — | A |
| Ohio Valley Aluminum Company, LLC KY | Manufacturing | 0 | — | F |
| Ohio Valley Bistro's Inc. (TGI Friday's at the Pittsburgh Airport) PA | — | 0 | — | — |
| Ohio Valley Coal Company Powhatan No. 6 Mine OH | — | 0 | — | — |
| Ohio Valley Electric Corporation OH | Utilities | 0 | — | F |
