| Dulany Industries NC | Manufacturing | 0 | — | A |
| DULCICH, INC AK | Manufacturing | 0 | — | F |
| Dulcich, Inc. OR | Wholesale Trade | 4 | $141,250 | D |
| Dulles Engineering, Inc VA | Professional & Technical Services | 3 | $86,833 | — |
| DULLES GEOTECHNICAL AND MATERIAL TESTING SERVICES, INC. VA | Professional & Technical Services | 1 | $70,720 | — |
| Dulles Hotel Corporation VA | Accommodation & Food Services | 0 | — | F |
| Dulles Suites LLC VA | Accommodation & Food Services | 0 | — | A |
| Dulonos MN | — | 0 | — | — |
| Dultmeier Sales NE | Wholesale Trade | 0 | — | B |
| Duluth Bethel Society, Inc. MN | Other Services | 0 | — | A |
| Duluth Broadway LLC (production of Girl from The North Country at The Belasco Theatre) NY | — | 0 | — | — |
| Duluth Cider MN | Manufacturing | 0 | — | A |
| Duluth Dodge MN | Retail Trade | 0 | — | D |
| duluth electrical contracting inc MN | Construction | 0 | — | D |
| Duluth Grill 2020 MN | — | 0 | — | — |
| Duluth Health Services MN | Healthcare & Social Assistance | 0 | — | A |
| Duluth Hills Youth and Family 2021 MN | — | 0 | — | — |
| Duluth Public Schools ISD 709 MN | Educational Services | 0 | — | A |
| Duluth Public Schools ISD709 MN | Educational Services | 0 | — | C |
| Duluth Steel Fabricators 2019 MN | — | 0 | — | — |
| Duluth Trading GA | Transportation & Warehousing | 0 | — | A |
| Duluth Trading IA | Transportation & Warehousing | 0 | — | D |
| Duluth Trading UT | Transportation & Warehousing | 0 | — | A |
| Duluth Trading WI | Transportation & Warehousing | 0 | — | B |
| Duluth Transit Authority MN | Transportation & Warehousing | 0 | — | C |
| DUMAC, Inc. NC | Educational Services | 2 | $110,000 | — |
| Dumars Industries, LLC AZ | Manufacturing | 0 | — | A |
| Dumas Contracting USA Inc. NY | — | 0 | — | — |
| Dumas I Enterprises LLC TX | Healthcare & Social Assistance | 0 | — | A |
| Dumes IN | Wholesale Trade | 0 | — | F |
| Dummen Orange OH | Agriculture & Forestry | 0 | — | A |
| DuMolin Community Living CA | Healthcare & Social Assistance | 0 | — | D |
| Dumore Corporation WI | Manufacturing | 0 | — | F |
| Dumore Motor Company WI | Manufacturing | 0 | — | A |
| Dump Guy ME | Administrative & Waste Services | 0 | — | F |
| Dumpstr Xpress - Arizona LLC. AZ | Administrative & Waste Services | 0 | — | A |
| Dumpstr Xpress Inc. MI | Administrative & Waste Services | 0 | — | A |
| Dun & Bradstreet AZ | — | 0 | — | — |
| Dun & Bradstreet CA | — | 0 | — | — |
| Dun & Bradstreet, Inc. FL | Information & Media | 4 | $156,489 | — |
| Dun-Par Engineered Form Co. MO | Construction | 0 | — | F |
| Dun-Rite Electrical Services, Inc. PA | Construction | 0 | — | F |
| Dun-Rite Home Improvements Inc CO | Construction | 0 | — | F |
| Dun-Rite of Wausau, Inc. WI | Construction | 0 | — | F |
| Dun-Rite Tool & Machine Co. IL | Manufacturing | 0 | — | F |
| Dunamis Coalition SC | Transportation & Warehousing | 0 | — | A |
| DUNAN PRECISION INC. TX | Wholesale Trade | 1 | $78,352 | — |
| Dunavant Distribution Group, LLC TX | Transportation & Warehousing | 0 | — | A |
| Dunavant Trans Gulf Transportation LLC TX | Transportation & Warehousing | 0 | — | A |
| Dunaway Associates, LLC TX | Professional & Technical Services | 1 | $116,485 | — |
