| Ojai Valley Inn CA | — | 0 | — | — |
| Ojai Valley Sanitary District CA | Utilities | 0 | — | F |
| OJC Estate, LLC MT | Accommodation & Food Services | 0 | — | A |
| OJCC LLC dba The Bridge Care Suites IL | Healthcare & Social Assistance | 0 | — | A |
| OJL Construction, LLC TX | Construction | 0 | — | A |
| OJUS LLC. NJ | Professional & Technical Services | 1 | $95,680 | — |
| OJV Construction CA | Manufacturing | 0 | — | F |
| Ok Airport LLC FL | Accommodation & Food Services | 0 | — | A |
| Ok Concrete Co TX | Manufacturing | 0 | — | F |
| OK Corporate Office AR | Manufacturing | 0 | — | A |
| OK Foods AL | Manufacturing | 0 | — | A |
| OK Foods OK | Manufacturing | 0 | — | C |
| OK FOODS, INC. AR | Manufacturing | 0 | — | D |
| OK International, Inc. CA | Manufacturing | 1 | $98,918 | — |
| OK Tire Store Inc MN | Retail Trade | 0 | — | C |
| OK Tire Store Inc ND | Retail Trade | 0 | — | C |
| OK Tire Store Inc DBA Elite Tire & Service ND | Retail Trade | 0 | — | A |
| Okabe Inc. IL | Wholesale Trade | 0 | — | A |
| Okami Logistics LLC OH | Transportation & Warehousing | 0 | — | D |
| Okami, Inc. CA | — | 0 | — | — |
| Okamoto Sandusky Manufacturing, LLC OH | Manufacturing | 0 | — | F |
| Okana Inc. NY | Construction | 1 | $62,400 | — |
| Okanagan Specialty Fruits, LLC. WA | Manufacturing | 0 | — | F |
| Okanogan County Public Hospital District 4 WA | Healthcare & Social Assistance | 2 | $199,610 | — |
| Okanogan Public Hospital District #4 WA | Healthcare & Social Assistance | 0 | — | B |
| OKATIE HILTON HEAD HOTEL SC | Accommodation & Food Services | 0 | — | A |
| Okay Industries, Inc CT | Manufacturing | 0 | — | F |
| OKB Paradise Manager, LLC HI | Accommodation & Food Services | 0 | — | A |
| OKBL USA Technology Inc. CA | Finance & Insurance | 23 | $252,439 | — |
| OKC USA Holding Inc. CA | Finance & Insurance | 4 | $214,380 | — |
| OKEECHOBEE COUNCIL ON AGING FL | Healthcare & Social Assistance | 0 | — | A |
| Okeechobee Health Care Facility FL | Healthcare & Social Assistance | 0 | — | F |
| Okeechobee Livestock Market FL | Transportation & Warehousing | 0 | — | F |
| Okefenoke Rural Electric Membership Corporation FL | Utilities | 0 | — | F |
| Okefenoke Rural Electric Membership Corporation GA | Utilities | 0 | — | F |
| okemah care center, l.l.c. OK | Healthcare & Social Assistance | 0 | — | F |
| OKI Data Americas, Inc. NJ | — | 0 | — | — |
| Oki Developments Inc WA | — | 0 | — | — |
| Oki Ringo dba Covina, o ya, & Roof @ Park South NY | — | 0 | — | — |
| Okizu Foundation CA | Healthcare & Social Assistance | 0 | — | A |
| OKL Engineering OH | Manufacturing | 0 | — | A |
| Oklahoma Baptist University OK | Professional & Technical Services | 1 | $98,739 | — |
| Oklahoma Blood Institute OK | Healthcare & Social Assistance | 6 | $79,069 | — |
| Oklahoma Chiller Corporation OK | Construction | 0 | — | F |
| Oklahoma City Ballet OK | Arts & Entertainment | 0 | — | A |
| Oklahoma City Golf & Country Club OK | Arts & Entertainment | 0 | — | C |
| Oklahoma City Museum of Art OK | Arts & Entertainment | 0 | — | A |
| Oklahoma City Rehabilitation Hospital OK | Healthcare & Social Assistance | 0 | — | F |
| Oklahoma City Waste Dipsosal, Inc. OK | Administrative & Waste Services | 0 | — | F |
| Oklahoma Conference of Seventh-day Adventists OK | Other Services | 2 | $67,614 | — |
