| MUSC Health Cheste Medical Center SC | Healthcare & Social Assistance | 0 | - | F |
| MUSC Health Kershaw SC | Healthcare & Social Assistance | 0 | - | F |
| MUSC Health Orangeburg SC | Healthcare & Social Assistance | 0 | - | F |
| MUSC Health Rehabilitation Hospital SC | Healthcare & Social Assistance | 0 | - | - |
| Musco Family Olive CA | Manufacturing | 0 | - | D |
| Musco Sport Lighting, LLC IA | Manufacturing | 0 | - | D |
| Musco Sports Lighting LLC IA | Manufacturing | 0 | - | D |
| Muscogee Creek Nation Department of Health OK | Healthcare & Social Assistance | 0 | - | B |
| Muscular Dystrophy Association IL | - | 0 | - | - |
| Muse Bio, Inc. CA | - | 1 | $172,099 | - |
| Muse Concrete Contractors Inc. CA | Construction | 0 | - | F |
| MuseLink Studio Technologies Inc. CA | - | 1 | $91,603 | - |
| Museum Associates CA | Arts & Entertainment | 1 | $64,272 | - |
| Museum of Contemporary Art, Los Angeles CA | - | 0 | - | - |
| Museum Of Discovery and Science FL | Arts & Entertainment | 0 | - | A |
| Museum of Fine Arts, Boston MA | Arts & Entertainment | 7 | $67,749 | - |
| Museum of Ice Cream TX | - | 0 | - | - |
| Museum of Ice Cream, Los Angeles CA | - | 0 | - | - |
| Museum of Jewish Heritage - A Living Memorial to the Holocaust NY | - | 0 | - | - |
| Museum of Pop Culture WA | - | 0 | - | - |
| Museum of Science MA | Arts & Entertainment | 0 | - | B |
| Museum Walk Apartments, LLC FL | - | 0 | - | - |
| Music City Delivery LLC TN | Transportation & Warehousing | 0 | - | F |
| Music to Grow on, Music Therapy Services, Inc CA | Healthcare & Social Assistance | 1 | $83,200 | - |
| Musician's Friend, Inc. IN | - | 0 | - | - |
| Musician's Friend, Inc. OR | - | 0 | - | - |
| Musician's Institute International, Inc. CA | - | 0 | - | - |
| Musiker Discovery Programs, Inc. CT | - | 3 | $95,000 | - |
| Muska Electric MN | Construction | 0 | - | F |
| Muskegon Charter Township MI | Public Administration | 0 | - | F |
| Muskegon Correctional Facility MI | Public Administration | 0 | - | F |
| Muskegon County MI | Public Administration | 0 | - | F |
| Muskegon Public Schools MI | Public Administration | 0 | - | D |
| Musket CORPORATION OK | - | 2 | $172,729 | - |
| Muskingum University OH | Educational Services | 11 | $58,880 | - |
| MusoLingo Inc CA | Information & Media | 1 | $100,000 | - |
| Musora US Ltd CA | - | 1 | $124,999 | - |
| Musser's Market PA | - | 0 | - | - |
| Mustang Assembly of God Church, Inc OK | - | 1 | $66,706 | - |
| Mustang Bio, Inc. MA | - | 0 | - | - |
| Mustang Consulting Incorporated MA | Professional & Technical Services | 1 | $70,000 | - |
| Mustang Machinery Company, LLC dba Mustang Cat TX | Other Services | 0 | - | A |
| Mustang Seal Solutions LLC TX | Manufacturing | 2 | $100,776 | - |
| Mustang Survival MFG Inc WV | Manufacturing | 0 | - | A |
| Musumanoco LLC MA | Professional & Technical Services | 2 | $69,576 | - |
| Mutex Corporation TX | - | 5 | $110,000 | - |
| Mutex Systems, Inc. NJ | Professional & Technical Services | 7 | $100,006 | - |
| Mutiny HQ Corporation CA | - | 1 | $220,000 | - |
| Mutual Aid Ambulance Service INC PA | Healthcare & Social Assistance | 0 | - | F |
| Mutual Materials CO OR | Manufacturing | 0 | - | F |
