| Oak Point University IL | - | 0 | - | - |
| Oak Ridge Care Center WI | Healthcare & Social Assistance | 0 | - | F |
| Oak Ridge Nursing Center OK | Healthcare & Social Assistance | 0 | - | - |
| Oak Ridge Schools TN | Educational Services | 0 | - | C |
| Oak Ridge Waste & Recycling CT | Administrative & Waste Services | 0 | - | F |
| Oak Ridge Waste & Recycling of CT LLC CT | Administrative & Waste Services | 0 | - | F |
| Oak River Insurance Company CA | Professional & Technical Services | 4 | $140,000 | - |
| Oak Springs Nursery CA | Administrative & Waste Services | 0 | - | A |
| Oak Street Health MSO LLC RI | Retail Trade | 12 | $146,574 | - |
| Oak Street Health MSO, LLC IL | Healthcare & Social Assistance | 10 | $122,690 | - |
| Oak Technologies Inc. TX | Professional & Technical Services | 3 | $98,121 | - |
| Oak Terrace Senior Housing Jordan MN | Healthcare & Social Assistance | 0 | - | F |
| Oak Thistle LLC NY | - | 1 | $113,131 | - |
| Oak Tree Ventures, LLC NJ | - | 1 | $103,210 | - |
| Oak Valley Hospital District CA | Healthcare & Social Assistance | 3 | $320,008 | F |
| Oak View Animal Hospital, PLLC AL | Professional & Technical Services | 1 | $250,000 | - |
| Oak View Animal Hospital, PLLC d/b/a Mission Pet Health AL | - | 1 | $145,000 | - |
| Oak View Group PA | - | 0 | - | - |
| Oak View Group OH | - | 0 | - | - |
| Oak View Group - at McCormick Place IL | - | 0 | - | - |
| Oak View Group LLC CA | Professional & Technical Services | 1 | $200,000 | - |
| Oak-It, Inc. CA | Manufacturing | 0 | - | F |
| Oak-Mitsui Technologies, LLC NY | - | 0 | - | - |
| Oak-Mitsui, Inc. NY | - | 0 | - | - |
| OakBend Medical Center TX | Healthcare & Social Assistance | 0 | - | B |
| Oakcraft,1nc AZ | Manufacturing | 0 | - | F |
| Oakcrest Lumber Inc. GA | Manufacturing | 0 | - | F |
| Oakcrest Lumber Inc. TN | Manufacturing | 0 | - | F |
| Oakdale Community Hospital LA | Healthcare & Social Assistance | 0 | - | D |
| Oakes Community Hospital ND | Healthcare & Social Assistance | 2 | $64,480 | - |
| Oakes Farms, Seed to Table FL | Retail Trade | 0 | - | A |
| Oakhurst Dairy ME | Manufacturing | 0 | - | F |
| Oakland Athletics CA | - | 0 | - | - |
| Oakland City University IN | - | 1 | $46,640 | - |
| Oakland Healthcare & Wellness Center CA | Healthcare & Social Assistance | 0 | - | F |
| Oakland Housing Authority CA | Public Administration | 0 | - | B |
| Oakland Logistics MS | - | 0 | - | - |
| Oakland Management Corp. MI | Real Estate | 0 | - | F |
| Oakland Management CORPORATION MI | - | 1 | $135,921 | - |
| Oakland Nursery OH | Retail Trade | 0 | - | A |
| Oakland Nursing and Rehabilitation MD | Healthcare & Social Assistance | 0 | - | F |
| Oakland Pallet Co., Inc. CA | Manufacturing | 0 | - | F |
| Oakland Park Communities, Inc. MN | Healthcare & Social Assistance | 0 | - | - |
| Oakland Rehabilitation and healthcare Center NJ | Healthcare & Social Assistance | 0 | - | F |
| Oakland Schools MI | Educational Services | 0 | - | A |
| Oakland Stamping LLC dba Autokiniton MI | - | 0 | - | - |
| Oakland Unified School District CA | Educational Services | 6 | $78,360 | - |
| Oakland University MI | Educational Services | 13 | $58,794 | - |
| Oakland YMCA CA | - | 0 | - | - |
| Oakleaf Surgical Hospital WI | Healthcare & Social Assistance | 0 | - | F |
