| Black Button Distilling NY | Manufacturing | 0 | — | F |
| Black Canyon Consulting LLC VA | Professional & Technical Services | 7 | $105,114 | — |
| Black Coffee and Waffle Bar MN | — | 0 | — | — |
| Black Construction Corporation GU | Construction | 21 | $55,465 | — |
| Black Creek Builders, Inc. CA | Construction | 0 | — | F |
| Black Creek Veterinary Hospital FL | Professional & Technical Services | 0 | — | A |
| Black Diamond UT | — | 0 | — | — |
| Black Diamond Advanced Technology, L.L.C. AZ | Manufacturing | 0 | — | A |
| Black Diamond Asphalt Paving LLC WA | Construction | 0 | — | A |
| Black Diamond General Contracting, Inc FL | Construction | 0 | — | A |
| black diamond inc OH | Retail Trade | 0 | — | A |
| Black Diamond Logistics LLC MA | Transportation & Warehousing | 0 | — | A |
| Black Diamond Paver Stones & Landscape, Inc. CA | Administrative & Waste Services | 0 | — | D |
| Black Diamond Paving, Inc. CA | Construction | 0 | — | F |
| Black Diamond Plumbing & Mechanical IL | Construction | 0 | — | F |
| Black Diamond Residential LLC FL | Construction | 0 | — | A |
| Black Dog Farms Of California Inc. CA | Agriculture & Forestry | 0 | — | F |
| Black Dot Express LLC IN | Transportation & Warehousing | 0 | — | F |
| Black Duck Software, Inc. CA | Professional & Technical Services | 2 | $106,030 | — |
| Black Duck Software, Inc. MA | Professional & Technical Services | 6 | $118,806 | — |
| Black Eagle Nurseries and Maintenance, Inc. AZ | Administrative & Waste Services | 0 | — | A |
| Black Earth Compost MA | Administrative & Waste Services | 0 | — | D |
| Black Electric Inc NY | Construction | 0 | — | A |
| Black Elite Logistics NV | Transportation & Warehousing | 0 | — | F |
| Black Entertainment Television, LLC (Viacom Inc.) NY | — | 0 | — | — |
| Black Entertainment TV LLC NY | Information & Media | 1 | $270,000 | — |
| Black Falcon Terminal, (Ports America) MA | Transportation & Warehousing | 0 | — | A |
| Black Forest CC Hotel LLC TX | Accommodation & Food Services | 0 | — | A |
| BLACK FOX COFFEE ROASTERS LLC NY | Manufacturing | 1 | $100,000 | — |
| Black Friday Bins, LLC CA | Retail Trade | 0 | — | F |
| Black Fur Biomedical LLC CA | Professional & Technical Services | 1 | $99,840 | — |
| Black Gap LLC TX | Construction | 0 | — | A |
| Black Gold Compost Company FL | Manufacturing | 0 | — | F |
| Black Gold Farms FL | Agriculture & Forestry | 0 | — | A |
| Black Gold Farms IN | Agriculture & Forestry | 0 | — | D |
| Black Gold Farms LA | Agriculture & Forestry | 0 | — | C |
| Black Gold Farms MD | Agriculture & Forestry | 0 | — | F |
| Black Gold Farms MI | Agriculture & Forestry | 0 | — | A |
| Black Gold Farms MN | Agriculture & Forestry | 0 | — | F |
| Black Gold Farms MO | Agriculture & Forestry | 0 | — | C |
| Black Gold Farms NC | Agriculture & Forestry | 0 | — | F |
| BLACK GOLD INC. KS | Construction | 0 | — | F |
| Black Hawk College IL | Educational Services | 0 | — | C |
| Black Hawk County IA | Public Administration | 0 | — | C |
| Black Hawk NDT LLC TX | Professional & Technical Services | 0 | — | A |
| Black Hawk Roof Co. IA | Construction | 0 | — | A |
| Black Hills Corp. Headquarters (SD006) SD | Utilities | 0 | — | A |
| Black Hills Electric Cooperative SD | Utilities | 0 | — | F |
| Black Hills Energy NE | — | 0 | — | — |
| Black Hills Energy SD | Utilities | 0 | — | D |
