| Maryland Wellness LLC MD | Healthcare & Social Assistance | 1 | $100,000 | B |
| Marymont Group NY | Professional & Technical Services | 5 | $92,847 | — |
| Marymount California University CA | — | 0 | — | — |
| Marymount Manhattan College NY | Educational Services | 0 | — | A |
| Marymount University VA | Educational Services | 1 | $53,040 | — |
| MARYPIVEN INC DBA CLEAN2CLEAN NY | Administrative & Waste Services | 0 | — | A |
| Marys Gone Crackers CA | — | 0 | — | — |
| Marysville Ethanol, LLC MI | Manufacturing | 0 | — | F |
| Marysville Marine Distributors MI | Wholesale Trade | 0 | — | A |
| Marysville Special Care Community, LLC WA | Healthcare & Social Assistance | 0 | — | F |
| Marysville Toyota WA | Retail Trade | 0 | — | F |
| Maryville, Inc. NJ | Healthcare & Social Assistance | 0 | — | C |
| Marywood Heights PA | Healthcare & Social Assistance | 0 | — | F |
| Marzetti foods MA | Manufacturing | 0 | — | C |
| Marzetti Frozen Pasta IA | Manufacturing | 0 | — | C |
| Marzetti Manufacturing Company NJ | Manufacturing | 0 | — | A |
| Marzola Construction Co. CA | Construction | 0 | — | F |
| MAS Building & Bridge, Inc. MA | Construction | 1 | $152,500 | D |
| MAS Construction Services, Inc. FL | Construction | 0 | — | A |
| MAS HOSPITALITY LLC FL | Accommodation & Food Services | 1 | $78,333 | — |
| MAS IT LABS LLC TX | Professional & Technical Services | 2 | $93,787 | — |
| MAS Metals CA | Manufacturing | 0 | — | A |
| Mas Tek IT, LLC NC | Professional & Technical Services | 1 | $61,173 | — |
| MAS US Holdings, Inc. NC | Transportation & Warehousing | 0 | — | D |
| Mas-Con Corp. NH | Construction | 0 | — | F |
| Masa NY, LLC dba Masa and Bar Masa NY | — | 0 | — | — |
| MASA TRUCKING CO. CA | Transportation & Warehousing | 0 | — | A |
| Masaba Inc. SD | Manufacturing | 0 | — | F |
| Masabi LLC NY | Professional & Technical Services | 2 | $180,500 | — |
| MASCAP Dealer Holdings LLC dba Dynamic Equipment FL | Wholesale Trade | 0 | — | A |
| Mascari Family LLC CA | Retail Trade | 0 | — | A |
| Mascaro Construction Company, L.P. PA | Construction | 0 | — | A |
| MASCHMEYER CONCRETE COMPANY FL | Manufacturing | 0 | — | A |
| Masci General Contractors, Inc. FL | Construction | 0 | — | A |
| Masco OH | Manufacturing | 0 | — | F |
| Masco Bath NJ | — | 0 | — | — |
| MASCO Bath OR | — | 0 | — | — |
| Masco Bath Corp. TN | — | 0 | — | — |
| Masco Cabinetry NJ | — | 0 | — | — |
| Masco Cabinetry OH | — | 0 | — | — |
| Masco Cabinetry VA | — | 0 | — | — |
| Masco Corporation KY | Manufacturing | 0 | — | F |
| Masco Corporation MI | Management of Companies | 1 | $125,000 | — |
| Masco Corporation NC | Transportation & Warehousing | 0 | — | A |
| Masco Interiors PA | Professional & Technical Services | 0 | — | F |
| Masco Retail Cabinet Group OH | — | 0 | — | — |
| Masco Support Services IN | — | 0 | — | — |
| Masco Support Services NC | Retail Trade | 0 | — | B |
| Mascoma LLC NH | Professional & Technical Services | 0 | — | A |
| Mascot Pecan Shelling CO GA | Manufacturing | 0 | — | A |
