| Oahu Metal & Glazing, LLC HI | Construction | 0 | — | A |
| Oahu Plumbing & Sheet Metal LTD HI | Construction | 0 | — | F |
| Oak and Iron Fitness NC | Arts & Entertainment | 1 | $38,500 | — |
| Oak Bend Medical Center TX | Healthcare & Social Assistance | 0 | — | B |
| OAK BEVERAGE INC NY | Wholesale Trade | 0 | — | F |
| Oak Beverages, Inc. (Warehouse) NY | — | 0 | — | — |
| Oak Brook Park District IL | Arts & Entertainment | 0 | — | A |
| Oak Canyon Mfg AZ | Manufacturing | 0 | — | A |
| Oak Chips, Inc. OH | Manufacturing | 0 | — | A |
| Oak City Sitework, Inc. NC | Construction | 0 | — | A |
| Oak Cliff Mirror & Glass Inc. TX | Construction | 0 | — | A |
| OAK CONTRACTING LLC MD | Construction | 0 | — | A |
| Oak Creek Homes TX | Manufacturing | 0 | — | F |
| Oak Creek LP CA | Accommodation & Food Services | 0 | — | F |
| Oak Creek Wood Products, LLC WI | Manufacturing | 0 | — | A |
| Oak Crest Residence IL | Healthcare & Social Assistance | 0 | — | A |
| Oak Electric Service, In. MI | Construction | 0 | — | F |
| Oak Farm Solutions LLC MD | Healthcare & Social Assistance | 0 | — | C |
| Oak Farms Dallas West TX | — | 0 | — | — |
| Oak Forest Lumber TX | Wholesale Trade | 0 | — | A |
| Oak Forest Management, LLC TX | Construction | 1 | $74,152 | — |
| Oak Forest Pointe NC | Real Estate | 0 | — | A |
| Oak Forest Realty, LLC MA | Real Estate | 2 | $80,080 | — |
| Oak Grove Christian Retirement Village IN | Healthcare & Social Assistance | 0 | — | F |
| Oak Grove Construction CA | Construction | 0 | — | F |
| Oak Grove Gin & Whse., LLC TN | Agriculture & Forestry | 0 | — | A |
| Oak Grove Gin& Warehouse, LLC TN | Agriculture & Forestry | 0 | — | A |
| Oak Grove Institute Foundation, Inc. CA | Healthcare & Social Assistance | 0 | — | A |
| Oak Grove Learning Tree OR | Healthcare & Social Assistance | 0 | — | A |
| Oak Grove Management Company LLC TX | Utilities | 0 | — | F |
| Oak Grove Manor OH | Healthcare & Social Assistance | 0 | — | A |
| Oak Grove Racing Gaming & Hotel KY | Arts & Entertainment | 0 | — | A |
| Oak Grove School OK | Educational Services | 0 | — | A |
| Oak Grove School District CA | Educational Services | 5 | $81,395 | — |
| Oak Grove Technologies AL | Educational Services | 0 | — | A |
| Oak Grove Technologies CA | Educational Services | 0 | — | A |
| Oak Grove Technologies FL | Educational Services | 0 | — | A |
| Oak Grove Technologies GA | Educational Services | 0 | — | A |
| Oak Grove Technologies KY | Educational Services | 0 | — | A |
| Oak Grove Technologies LA | Educational Services | 0 | — | A |
| Oak Grove Technologies MA | Educational Services | 0 | — | A |
| Oak Grove Technologies MD | Educational Services | 0 | — | A |
| Oak Grove Technologies NC | Educational Services | 0 | — | C |
| Oak Grove Technologies NJ | Educational Services | 0 | — | A |
| Oak Grove Technologies NM | Educational Services | 0 | — | F |
| Oak Grove Technologies TN | Educational Services | 0 | — | A |
| Oak Grove Technologies VA | Educational Services | 0 | — | A |
| Oak Grove Technologies WA | Educational Services | 0 | — | A |
| Oak Grove Technologies WV | Educational Services | 0 | — | A |
| Oak Grove Technologies WY | Educational Services | 0 | — | A |
