| Oldham County Fiscal Court KY | Public Administration | 0 | — | A |
| Oldham County Health Department KY | Public Administration | 0 | — | A |
| Oldham Graphic Supply, Inc dba The Oldham Group IL | Wholesale Trade | 0 | — | A |
| Oldsmar -Tech Air FL | Manufacturing | 0 | — | A |
| Ole Distribution LLC FL | Information & Media | 0 | — | A |
| Ole Media Services Inc FL | Information & Media | 0 | — | A |
| Ole Mexican Foods Inc FL | Manufacturing | 0 | — | B |
| Ole Mexican Foods Inc GA | Manufacturing | 0 | — | C |
| Ole Mexican Foods Inc KY | Manufacturing | 0 | — | A |
| Ole Mexican Foods Inc NC | Manufacturing | 0 | — | A |
| Ole Mexican Foods Inc TN | Manufacturing | 0 | — | A |
| Ole Mexican Foods Inc TX | Manufacturing | 0 | — | D |
| Ole Mexican Foods, INC AR | Manufacturing | 0 | — | A |
| Ole Mexican Foods, INC OK | Manufacturing | 0 | — | A |
| Ole Smoky Distillery, LLC TN | Manufacturing | 0 | — | A |
| Ole South Auto Salvage FL | Retail Trade | 0 | — | A |
| Ole South Excavating, Inc. TN | Construction | 0 | — | F |
| Olea Kiosks Inc. CA | Manufacturing | 0 | — | F |
| Olean General Hospital NY | Healthcare & Social Assistance | 3 | $215,200 | — |
| Olean Hotel Group, LLC NY | Accommodation & Food Services | 0 | — | A |
| Olean Lodging Partnership, LLC NY | Accommodation & Food Services | 0 | — | A |
| Olean Manor, Inc. NY | Healthcare & Social Assistance | 0 | — | F |
| Olean Medical Practice PLLC NY | Healthcare & Social Assistance | 1 | $450,000 | — |
| OLEDWorks LLC NY | Manufacturing | 0 | — | A |
| Olein Recovery Corp. PR | Manufacturing | 0 | — | D |
| Olema House, LP CA | Accommodation & Food Services | 0 | — | F |
| Olentangy Village Management LLC OH | Real Estate | 0 | — | F |
| OLEO-X, LLC MS | Manufacturing | 0 | — | A |
| Oleria Corporation WA | Information & Media | 1 | $230,000 | — |
| Oleson's Food Store MI | Retail Trade | 0 | — | A |
| Oleson's Food Stores MI | Retail Trade | 0 | — | A |
| OleumTech Corporation CA | Manufacturing | 0 | — | C |
| Olga Street Ltd. dba Lucky Strike NY | — | 0 | — | — |
| OLGIN EFUNE RECYCLING COMPANY-OLGIN EFUNE RECYCLING COMPANY AZ | Wholesale Trade | 0 | — | A |
| Olhausen Billiard Manufacturing Inc. TN | — | 0 | — | — |
| OLI Architecture PLLC NY | Professional & Technical Services | 1 | $62,000 | — |
| oli viv inc CA | Wholesale Trade | 0 | — | A |
| Oliden Technology, LLC TX | Professional & Technical Services | 1 | $93,300 | — |
| Oliff Construction Inc MD | Construction | 0 | — | A |
| Olightstore USA Inc. VA | Wholesale Trade | 1 | $75,950 | — |
| Oligo Factory, Inc. MA | Manufacturing | 0 | — | A |
| Olin Chlor Alkali AL | Manufacturing | 0 | — | A |
| Olin Chlor Alkali AR | Manufacturing | 0 | — | A |
| Olin Chlor Alkali CA | Manufacturing | 0 | — | F |
| Olin Chlor Alkali GA | Manufacturing | 0 | — | A |
| Olin Chlor Alkali IL | Manufacturing | 0 | — | B |
| Olin Chlor Alkali LA | Manufacturing | 0 | — | A |
| Olin Chlor Alkali NV | Manufacturing | 0 | — | A |
| Olin Chlor Alkali NY | Manufacturing | 0 | — | A |
| Olin Chlor Alkali TN | Manufacturing | 0 | — | A |
