| Oak Hall Cap and Gown VA | Manufacturing | 0 | — | C |
| Oak Hammock Apartments, L.P. FL | Real Estate | 0 | — | A |
| Oak Hammock at the University of Florida, Inc. FL | Healthcare & Social Assistance | 0 | — | F |
| Oak Harbor Freight Lines AZ | Transportation & Warehousing | 0 | — | F |
| Oak Harbor Freight Lines CA | Transportation & Warehousing | 0 | — | F |
| Oak Harbor Freight Lines ID | Transportation & Warehousing | 0 | — | F |
| Oak Harbor Freight Lines NV | Transportation & Warehousing | 0 | — | D |
| Oak Harbor Freight Lines OR | Transportation & Warehousing | 0 | — | F |
| Oak Harbor Freight Lines UT | Transportation & Warehousing | 0 | — | F |
| Oak Harbor Freight Lines WA | Transportation & Warehousing | 0 | — | F |
| Oak Haven Healthcare Center LA | Healthcare & Social Assistance | 0 | — | F |
| Oak Health Care Investors of Defiance, Inc OH | Healthcare & Social Assistance | 0 | — | F |
| Oak Health Care Investors of Mt. Vernon, INC OH | Healthcare & Social Assistance | 0 | — | F |
| Oak Health Care Investors of North Carolina, INC NC | Healthcare & Social Assistance | 0 | — | F |
| Oak Health Care Investors of Richmond, Virginia, INC VA | Healthcare & Social Assistance | 0 | — | F |
| Oak Health Care Investors of Salisbury, INC NC | Healthcare & Social Assistance | 0 | — | F |
| Oak Health Care Investors, INC IN | Healthcare & Social Assistance | 0 | — | F |
| Oak Hill CT | Healthcare & Social Assistance | 0 | — | F |
| Oak Hill Advisors, LP NY | Finance & Insurance | 1 | $110,000 | — |
| Oak Hill Capital Management LLC CT | Finance & Insurance | 1 | $150,000 | — |
| Oak Hill Center for Rehabiliation and Nursing LLC RI | Healthcare & Social Assistance | 0 | — | F |
| Oak Hill Corporation VT | Accommodation & Food Services | 0 | — | A |
| Oak Hill Country Club NY | Arts & Entertainment | 0 | — | F |
| Oak Hill Industries CT | Healthcare & Social Assistance | 0 | — | A |
| Oak Hill Investment, LLC OH | Real Estate | 0 | — | A |
| Oak Hill ISD 742 MN | Educational Services | 0 | — | A |
| Oak Hill Manor Nursing Home NY | Healthcare & Social Assistance | 0 | — | F |
| Oak Hill Montessori Community School MN | Educational Services | 0 | — | A |
| Oak Hill Veneer Inc PA | Manufacturing | 0 | — | B |
| Oak Hills Carton Co. OH | Manufacturing | 0 | — | A |
| Oak Hills Construction, LLC WA | Construction | 0 | — | F |
| Oak Hills Nursing & Rehab Center OH | Healthcare & Social Assistance | 0 | — | F |
| Oak Hills Park Authority CT | Arts & Entertainment | 0 | — | A |
| Oak Hills Terrace Memory Care TX | Healthcare & Social Assistance | 0 | — | F |
| Oak Knoll Farming CA | Agriculture & Forestry | 0 | — | F |
| Oak Knoll Health and Rehabilitation, LLC AL | Healthcare & Social Assistance | 0 | — | F |
| OAK LANE WELLNESS & REHABILITATION CENTER LA | Healthcare & Social Assistance | 0 | — | F |
| OAK LEAF ENGINEERING CORP. NJ | Professional & Technical Services | 1 | $49,920 | — |
| Oak Mountain Industries, INC MI | Construction | 0 | — | F |
| Oak Park Care Center MO | Healthcare & Social Assistance | 0 | — | F |
| Oak Park Cleaners LP TX | Other Services | 0 | — | A |
| Oak Park Oasis IL | Healthcare & Social Assistance | 0 | — | F |
| Oak Point University IL | — | 0 | — | — |
| Oak Pointe of Warrenton MO | Healthcare & Social Assistance | 0 | — | A |
| Oak Pro II WI | Accommodation & Food Services | 0 | — | F |
| Oak pro Partners LLP WI | Accommodation & Food Services | 0 | — | A |
| Oak Ridge Care Center WI | Healthcare & Social Assistance | 0 | — | F |
| Oak Ridge Landworks Inc. CA | Administrative & Waste Services | 0 | — | D |
| Oak Ridge Nursing Center OK | Healthcare & Social Assistance | 0 | — | F |
| Oak Ridge School Distirct TN | Educational Services | 0 | — | A |
