| Ducera Partners LLC NY | Finance & Insurance | 1 | $225,000 | — |
| Duck Creek Technologies LLC MA | Professional & Technical Services | 13 | $146,808 | — |
| Duck Rive EMC TN | Utilities | 0 | — | F |
| Duck River EMC TN | Utilities | 0 | — | F |
| Duckhorn Wine Company CA | Manufacturing | 1 | $243,214 | D |
| Duckhorn Wine Company WA | Manufacturing | 0 | — | F |
| Duckhorn Wine Company DBA Calera Winery CA | — | 0 | — | — |
| Duckhorn Wine Company DBA Kosta Browne Winery CA | — | 0 | — | — |
| Ducky Recovery, LLC LA | Construction | 0 | — | A |
| Duco Consultancy Inc. CA | Professional & Technical Services | 1 | $90,000 | — |
| Ducommon LaBarge Technologies RI | Manufacturing | 0 | — | D |
| Ducommun Aerostructures, Inc. KS | Manufacturing | 0 | — | A |
| Ducommun Labarge Technology CA | Manufacturing | 0 | — | A |
| Ducommun Aerostructures CA | Manufacturing | 0 | — | A |
| Ducommun AeroStructures New York, Inc. NY | Manufacturing | 0 | — | B |
| Ducommun Coxsackie NY | Manufacturing | 0 | — | A |
| Ducommun Gardena CA | Manufacturing | 0 | — | B |
| Ducommun Incorporated/Ducommun CA | — | 0 | — | — |
| Ducommun LaBarge Technologies,Inc AR | Manufacturing | 0 | — | A |
| Ducommun LaBarge Technologies,Inc MO | Manufacturing | 0 | — | A |
| Ducommun LaBarge Technologies,Inc OK | Manufacturing | 0 | — | A |
| Ducommun Monrovia CA | Manufacturing | 0 | — | A |
| Ducommun Technologies CA | — | 0 | — | — |
| Ducon Environmental Systems NY | Professional & Technical Services | 1 | $90,000 | — |
| DUCON, LLC FL | Construction | 0 | — | A |
| DUCONT SYSTEMS INC NJ | Professional & Technical Services | 3 | $98,441 | — |
| Duct Design FL | Construction | 0 | — | A |
| Duct Dynasty Clean Air LLC FL | Administrative & Waste Services | 0 | — | A |
| Duct-O-Wire Co WI | Manufacturing | 0 | — | A |
| DUCTS UNLIMITED MECHANICAL SYSTEMS INC. CO | Construction | 0 | — | F |
| Ductworks, Inc. CO | Administrative & Waste Services | 0 | — | A |
| Ducworks, Inc UT | Manufacturing | 0 | — | A |
| Duda Cable Construction Inc. PA | Construction | 0 | — | F |
| Duda Energy AL | Wholesale Trade | 0 | — | A |
| Duda Farm Fresh Foods, Inc. CA | Agriculture & Forestry | 0 | — | F |
| Duda Farm Fresh Foods, Inc. FL | Wholesale Trade | 0 | — | C |
| Dudeck Roofing & Sheet Metal, Inc. IN | Construction | 0 | — | A |
| Dudek CA | Professional & Technical Services | 0 | — | F |
| Dudek & Bock Spring Mfg. Co. IL | Manufacturing | 0 | — | F |
| Dudley Laundry Company NE | Other Services | 0 | — | F |
| Dudley Lumber Company AL | Manufacturing | 0 | — | A |
| Dudley Moving NE | Transportation & Warehousing | 0 | — | F |
| DUDLEY POULTRY COMPANY INC. NY | Wholesale Trade | 0 | — | F |
| Duelytics LLC TX | Professional & Technical Services | 1 | $131,997 | — |
| Duer Construction Co OH | Construction | 0 | — | A |
| Duerr Packaging Co., Inc. PA | Manufacturing | 0 | — | A |
| Duetto Research, Inc. CA | Information & Media | 1 | $99,486 | — |
| Dufeck Manufacturing Company WI | Manufacturing | 0 | — | B |
| Duff & Phelps Investment Management Co. IL | Professional & Technical Services | 1 | $220,500 | — |
| Duff's Friendship Villa NE | — | 0 | — | — |
