| Magnum Companies SD | Transportation & Warehousing | 0 | — | D |
| Magnum Companies WI | Transportation & Warehousing | 0 | — | F |
| Magnum Companies 2019 MN | — | 0 | — | — |
| Magnum Construction Company MI | Manufacturing | 0 | — | A |
| Magnum Construction Inc. IN | Construction | 0 | — | A |
| Magnum Construction Management, LLC FL | Construction | 0 | — | A |
| Magnum Construction, Inc OK | Construction | 0 | — | A |
| Magnum Contemporary Housing, Inc TX | Construction | 0 | — | A |
| Magnum Contracting Inc. ND | Construction | 0 | — | C |
| Magnum Contracting, LLC GA | Construction | 0 | — | A |
| Magnum Custom Trailer Mfg Co, Inc. TX | Manufacturing | 0 | — | F |
| Magnum Dedicated MN | Transportation & Warehousing | 0 | — | A |
| Magnum Drywall, Inc. CA | — | 0 | — | — |
| Magnum Electric Inc ND | Construction | 0 | — | A |
| MAGNUM EQUITY HOLDINGS INC TX | Professional & Technical Services | 2 | $109,460 | — |
| Magnum Express IN | Transportation & Warehousing | 0 | — | A |
| Magnum Ltd CO | Transportation & Warehousing | 0 | — | C |
| Magnum Ltd IA | Transportation & Warehousing | 0 | — | F |
| Magnum Ltd IL | Transportation & Warehousing | 0 | — | F |
| Magnum Ltd MN | Transportation & Warehousing | 0 | — | F |
| Magnum Ltd MO | Transportation & Warehousing | 0 | — | A |
| Magnum Ltd ND | Transportation & Warehousing | 0 | — | F |
| Magnum Ltd NE | Transportation & Warehousing | 0 | — | D |
| Magnum Ltd SD | Transportation & Warehousing | 0 | — | F |
| Magnum Ltd WI | Transportation & Warehousing | 0 | — | A |
| Magnum Machining, Inc. MN | Manufacturing | 0 | — | F |
| Magnum Magnetics OH | Manufacturing | 0 | — | F |
| Magnum Management Corporation A Cedar Fair, L.P. Company NC | Arts & Entertainment | 0 | — | D |
| Magnum Metals, LLC MS | Manufacturing | 0 | — | F |
| Magnum Opus IT, Inc. GA | Professional & Technical Services | 6 | $84,127 | — |
| Magnum Piering OH | Manufacturing | 0 | — | F |
| Magnum Precision Operations, LLC TX | — | 0 | — | — |
| Magnum Producing, LP TX | Mining & Extraction | 2 | $140,040 | — |
| Magnum Steel Works, Inc. IL | Manufacturing | 0 | — | F |
| MAGNUM TOOL CORPORATION TX | Wholesale Trade | 1 | $60,320 | — |
| Magnum Venus Products WA | Manufacturing | 0 | — | F |
| MagnumCare MI | — | 0 | — | — |
| Magnus Precision Manufacturing, Inc. NY | Manufacturing | 0 | — | F |
| Magnuson Group Inc. IL | Manufacturing | 0 | — | A |
| Magnuson Hotel Marina Cove FL | — | 0 | — | — |
| Magnuson Products LLC CA | Manufacturing | 1 | $166,800 | — |
| Magnussen Fremont Imports, Inc. dba Magnussen Lexus of Fremont CA | — | 0 | — | — |
| Magnussen Imports Inc Magnussen's Toyota of Palo Alto CA | — | 0 | — | — |
| Magnusson Klemencic Associates, Inc. WA | Professional & Technical Services | 1 | $93,000 | — |
| MAGO CONSTRUCTION COMPANY LLC KY | Manufacturing | 0 | — | D |
| Magor Mold LLC CA | Manufacturing | 0 | — | A |
| Magor Molds LLC CA | Manufacturing | 0 | — | A |
| Magotteaux TN | Manufacturing | 0 | — | C |
| Magpies Gourmet Pizza AZ | — | 0 | — | — |
| Magpro LLC TN | Manufacturing | 0 | — | F |
