| Master Extrusion AL | Manufacturing | 0 | - | F |
| Master Finish Company MI | Manufacturing | 0 | - | F |
| Master Forwarding Network, Inc. CA | Professional & Technical Services | 1 | $75,255 | - |
| Master Guard IN | - | 0 | - | - |
| Master Halco IL | Manufacturing | 0 | - | F |
| Master Halco PA | - | 0 | - | - |
| Master Informatix Systems, Inc. VA | Professional & Technical Services | 1 | $118,456 | - |
| Master Klean Janitorial, INC CO | Administrative & Waste Services | 0 | - | C |
| Master Lock Company WI | - | 0 | - | - |
| Master Machine, Inc. MN | Manufacturing | 0 | - | F |
| Master Manager 2020 Inc. AZ | - | 1 | $110,000 | - |
| Master Minds Consulting Services, LLC. TX | Professional & Technical Services | 4 | $106,000 | - |
| Master Power Transmission Inc. IN | Manufacturing | 2 | $88,007 | - |
| Master Spas IN | Manufacturing | 0 | - | F |
| Master Woodcraft Cabinetry TX | Manufacturing | 0 | - | F |
| Masterapp Labs LLC GA | Professional & Technical Services | 1 | $109,283 | - |
| Masterbrand Cabinets AL | - | 0 | - | - |
| Masterbrand Cabinets NC | Manufacturing | 0 | - | D |
| Masterbrand Cabinets Inc GA | Manufacturing | 0 | - | D |
| MasterBrand Cabinets LLC CA | - | 0 | - | - |
| Masterbrand Cabinets LLC OH | Manufacturing | 5 | $140,060 | - |
| MasterBrand Cabinets, Inc. IA | Manufacturing | 0 | - | B |
| Masterbrand Cabinets, Inc. IN | Manufacturing | 0 | - | B |
| MasterBrand Cabinets, Inc. VA | Manufacturing | 0 | - | A |
| MasterBrand, Inc. KS | Manufacturing | 0 | - | D |
| Masterbrand, Inc. KY | Manufacturing | 0 | - | D |
| Mastercard International Incorporated NY | Finance & Insurance | 90 | $138,000 | - |
| Mastercard Mobile Transactions Solutions, Inc. NY | Finance & Insurance | 1 | $166,000 | - |
| Mastercard Technologies, LLC MO | Finance & Insurance | 313 | $132,000 | - |
| Mastercard Transaction Services (US) LLC NY | Finance & Insurance | 1 | $138,000 | - |
| MasterControl Solutions, Inc. UT | Professional & Technical Services | 1 | $137,500 | - |
| MasterCorp Inc. CA | - | 0 | - | - |
| Mastercraft Electric, Inc. WA | Construction | 0 | - | F |
| Mastercraft Inc IN | Manufacturing | 0 | - | F |
| Mastercraft Industries Inc. WI | Manufacturing | 0 | - | A |
| Masterguard IN | Manufacturing | 0 | - | F |
| MasterMold WI | Manufacturing | 0 | - | F |
| Masterpiece Art Gallery CA | - | 0 | - | - |
| Masterprep Academy-Irvine LLC CA | - | 1 | $83,200 | - |
| Masters Gallery Foods, Inc. WI | Wholesale Trade | 0 | - | D |
| Masters Machine Company Inc. ME | Manufacturing | 0 | - | F |
| Masters Transport & Logistics, LLC TX | Transportation & Warehousing | 0 | - | F |
| Masterson Company WI | Manufacturing | 0 | - | F |
| Mastro Services Inc TX | Professional & Technical Services | 10 | $101,910 | - |
| Mastroianni Bros, Inc. NY | - | 0 | - | - |
| Mastroianni Family Enterprises dba Jay's Catering & Ellie's Table CA | - | 0 | - | - |
| Mastronardi Produce MI | Transportation & Warehousing | 0 | - | A |
| Mastronardi Produce - USA, Inc. MI | Transportation & Warehousing | 1 | $150,000 | - |
| Mastronardi Produce Inc. ME | Agriculture & Forestry | 0 | - | F |
| Mastronardi Produce USA TX | Wholesale Trade | 0 | - | C |