| Don's Cold Storage and Transportation MO | Transportation & Warehousing | 0 | — | A |
| Don's Masonry Inc CO | Construction | 0 | — | F |
| Don's Mobile Glass, Inc. CA | Retail Trade | 0 | — | F |
| Don't Wonder Productions CA | Information & Media | 0 | — | A |
| Dona Luisa's Mexican Grill CA | Accommodation & Food Services | 0 | — | A |
| DonahueFavret Contractors, Inc. LA | Construction | 0 | — | A |
| Donahues Greenhouses Inc. MN | Agriculture & Forestry | 0 | — | C |
| Donald B Murphy Contractors Inc. WA | Construction | 0 | — | A |
| Donald B Remmey Inc PA | Manufacturing | 0 | — | F |
| Donald B. Rice Tire Co., Inc. MD | Wholesale Trade | 0 | — | F |
| Donald Beeman CA | Agriculture & Forestry | 0 | — | F |
| Donald Bond Construction, Inc. MO | Construction | 0 | — | F |
| DONALD BREMMEY INC PA | Manufacturing | 0 | — | F |
| Donald Danforth Plant Science Center MO | Professional & Technical Services | 6 | $63,197 | — |
| Donald Excavating, Inc. MD | Construction | 0 | — | A |
| Donald Holm Construction Co., Inc. MN | Construction | 0 | — | F |
| Donald L Dillon DDS CA | — | 0 | — | — |
| Donald L. Keeney Gen Contr Inc PA | Construction | 0 | — | A |
| Donald L. Mooney Enterprises LLC TX | Administrative & Waste Services | 0 | — | A |
| Donald Martens and Sons Ambulance Service, Inc. OH | Healthcare & Social Assistance | 0 | — | F |
| Donald Moss Corp FL | Transportation & Warehousing | 0 | — | A |
| Donald R Frantz Concrete Construction, LLC MN | Construction | 0 | — | F |
| Donald Smith Company, Inc AL | Construction | 0 | — | A |
| Donald's Welding, Inc. NC | Construction | 0 | — | F |
| Donaldson Bros. Ready Mix, Inc. MT | Manufacturing | 0 | — | F |
| Donaldson Co., Inc. CA | Manufacturing | 0 | — | D |
| Donaldson Company IL | Manufacturing | 0 | — | D |
| Donaldson Company MN | Management of Companies | 0 | — | A |
| Donaldson Company PA | Manufacturing | 0 | — | B |
| DONALDSON COMPANY INC. IA | Manufacturing | 0 | — | F |
| Donaldson Company Inc. MO | Manufacturing | 0 | — | F |
| Donaldson Company Inc. TN | Manufacturing | 0 | — | D |
| Donaldson Company, Inc KY | Manufacturing | 0 | — | F |
| Donaldson Company, Inc. AL | Manufacturing | 0 | — | F |
| Donaldson Company, Inc. IN | Manufacturing | 0 | — | F |
| Donaldson Company, Inc. WI | Manufacturing | 0 | — | F |
| Donaldson Electric Co., Inc. GA | Construction | 0 | — | A |
| Donaldson Enterprises Inc AR | Retail Trade | 0 | — | B |
| Donaldson Filtration Solutions IA | — | 0 | — | — |
| Donaldson Organization NY | Construction | 0 | — | F |
| Donaldsons Inc. NY | — | 0 | — | — |
| DONALSONVILLE HOSPITAL INC GA | Healthcare & Social Assistance | 3 | $59,523 | F |
| Donamarc Inc. OH | Construction | 0 | — | D |
| Donato Plumbing Inc NY | Construction | 0 | — | F |
| DONATO TECHNOLOGIES INC TX | Professional & Technical Services | 28 | $104,261 | — |
| DONATO USA INC CO | Professional & Technical Services | 1 | $115,000 | — |
| Doncaster LLC IN | Retail Trade | 0 | — | A |
| Doncaster LLC MI | Retail Trade | 0 | — | B |
| Doncaster LLC OH | Retail Trade | 0 | — | A |
| Doncasters CA | Manufacturing | 0 | — | F |
