| Black Hills Industries LLC dba Black Hills Roofing SD | Construction | 0 | — | A |
| Black Hills Orthopedic & Spine Center SD | Healthcare & Social Assistance | 0 | — | A |
| Black Hills State University SD | Educational Services | 1 | $70,392 | — |
| Black Hills Surgical Hospital SD | Healthcare & Social Assistance | 0 | — | F |
| Black Hills Truss and Components LLC SD | Manufacturing | 0 | — | F |
| Black Hills Works SD | Healthcare & Social Assistance | 0 | — | F |
| Black Horse Carriers Inc. WI | — | 0 | — | — |
| Black Horse Carriers Inc. - Revision 1 WI | — | 0 | — | — |
| Black Horse Group NY | Construction | 0 | — | A |
| Black Inc AR | Retail Trade | 0 | — | D |
| Black Iron Metalwork Inc. OK | Manufacturing | 0 | — | A |
| Black Iron Reinforcing, LLC NV | Construction | 0 | — | F |
| Black Leg Ranch Meats, LLC ND | Agriculture & Forestry | 1 | $39,187 | — |
| Black Lexington Group, LLC (44th St) NY | — | 0 | — | — |
| Black Lexington Group, LLC (Broadway) NY | — | 0 | — | — |
| Black Lexington Group, LLC (Corporate) NY | — | 0 | — | — |
| Black Lexington Group, LLC (Reade) NY | — | 0 | — | — |
| Black Line Glazing OR | Construction | 0 | — | F |
| Black Micro Corporation GU | Construction | 4 | $57,250 | — |
| Black Mountain Home for Children, Youth & Families, Inc. NC | Healthcare & Social Assistance | 0 | — | F |
| Black Mountain Land Company LP TX | Utilities | 1 | $123,739 | — |
| Black Mountain Management, LLC TX | — | 0 | — | — |
| Black Mountain Neuro Medical Treatment Center NC | Healthcare & Social Assistance | 0 | — | C |
| Black Mountain Oil & Gas TX | Construction | 0 | — | A |
| Black Mountain Ranch WA | Accommodation & Food Services | 0 | — | A |
| Black Mountain Sand OK | — | 0 | — | — |
| Black Nile Logistics LLC GA | Transportation & Warehousing | 0 | — | B |
| Black Oak Casino Resort CA | Arts & Entertainment | 0 | — | B |
| black oak gin co AR | Agriculture & Forestry | 0 | — | A |
| Black Oak Mining, LLC WV | — | 0 | — | — |
| Black Ops Concrete Construction UT | Construction | 0 | — | A |
| Black Panther Mining IN | — | 0 | — | — |
| Black Pest Prevention, Inc. NC | Administrative & Waste Services | 0 | — | F |
| Black Point Seafood ME | Wholesale Trade | 0 | — | A |
| Black Prong Equestrian Village LLC FL | Accommodation & Food Services | 0 | — | F |
| Black Ridge Canyon Healthcare INC TX | Healthcare & Social Assistance | 0 | — | F |
| Black Rifle Coffee Company LLC UT | Retail Trade | 1 | $191,000 | — |
| Black River SC | Utilities | 0 | — | A |
| Black River Commodities, LLC. AR | Manufacturing | 0 | — | A |
| Black River Electric Cooperative MO | Utilities | 0 | — | F |
| BLACK RIVER ENERGY SERVICES LLC TX | Mining & Extraction | 0 | — | A |
| Black River Generating Facility NY | — | 0 | — | — |
| Black River Group, Inc. OH | Manufacturing | 0 | — | A |
| Black River Imaging MO | Other Services | 0 | — | D |
| BLACK RIVER MEMORIAL HOSPITAL WI | Healthcare & Social Assistance | 0 | — | F |
| Black River Plumbing, Heating & AC, Inc. NY | Construction | 0 | — | F |
| BLACK ROCK COFFEE HOLDINGS LLC AZ | Administrative & Waste Services | 0 | — | A |
| BLACK ROCK COFFEE HOLDINGS LLC OR | Administrative & Waste Services | 0 | — | A |
| Black Rock Concrete LLC UT | Construction | 0 | — | F |
| BLACK ROCK ROASTING COMPANY AZ | Manufacturing | 0 | — | B |
