| Marglen Industries GA | Manufacturing | 0 | - | F |
| Marguerite Concrete Inc MA | Construction | 0 | - | F |
| Maria Droste Services of Colorado, Inc. CO | Healthcare & Social Assistance | 2 | $51,251 | - |
| Maria E Marzo Dds PC NY | Healthcare & Social Assistance | 1 | $200,000 | - |
| Maria Health Care Center MD | - | 0 | - | - |
| Maria Parham Health NC | Healthcare & Social Assistance | 0 | - | F |
| Maria's Holding Corp. dba Maria's Italian Kitchen Inc. CA | - | 0 | - | - |
| Marian Community Hospital, Outpatient Clinic I, II, Outpatient Center II, Endless Mountains Medical Clinic, Waymart Family Medical Center PA | - | 0 | - | - |
| Marian Estates OR | Healthcare & Social Assistance | 0 | - | F |
| Marian Inc. IN | Manufacturing | 0 | - | C |
| Marian Manor Skilled Nursing MA | Healthcare & Social Assistance | 0 | - | - |
| Marian University, Inc. IN | Educational Services | 5 | $82,500 | - |
| Marian Village Corporation MI | Healthcare & Social Assistance | 0 | - | - |
| Mariana Minerals CO. CA | Manufacturing | 15 | $150,000 | - |
| Marianas Dental Center, LLC MP | - | 1 | $48,693 | - |
| Marianas Energy Company LLC GU | Utilities | 6 | $53,371 | - |
| Mariane, Inc. MI | Accommodation & Food Services | 0 | - | B |
| Mariani Enterprises LLC DBA NatureWorks Landscape MA | Administrative & Waste Services | 0 | - | F |
| Mariani Enterprises LLC DBA Rocky Mountain Custom Landscapes CO | Administrative & Waste Services | 0 | - | C |
| Mariani Enterprises LLC DBA RP Marzilli MA | Administrative & Waste Services | 0 | - | F |
| Mariani Enterprises, LLC dba Designs by Sundown CO | Administrative & Waste Services | 0 | - | F |
| Mariani Enterprises, LLC dba Glengate CT | Construction | 0 | - | F |
| Mariani Enterprises, LLC. IL | Administrative & Waste Services | 0 | - | C |
| Mariani Nursery LLC IL | Wholesale Trade | 0 | - | A |
| Mariani Nursery LLC WI | Wholesale Trade | 0 | - | A |
| Mariani Nut Company CA | Retail Trade | 0 | - | F |
| Mariani Packing Co WI | Transportation & Warehousing | 0 | - | B |
| Marianna Airmotive FL | - | 0 | - | - |
| Mariano Prime Limited Liability Company GU | Wholesale Trade | 1 | $57,450 | - |
| Mariano's IL | Retail Trade | 0 | - | D |
| Marich Confectionery CA | Manufacturing | 0 | - | F |
| Maricopa Association of Governments AZ | Other Services | 1 | $69,597 | - |
| Maricopa County AZ | Public Administration | 0 | - | C |
| Maricopa County Community College District AZ | Educational Services | 1 | $111,459 | - |
| Maricopa County Osborn School District AZ | Educational Services | 1 | $50,000 | - |
| Maricopa Integrated Health System (CCC) AZ | - | 0 | - | - |
| Maricopa Unified School District AZ | Educational Services | 8 | $68,247 | - |
| Maricorp US MO | Construction | 0 | - | F |
| Marie Star Home Health Services, LLC CA | - | 1 | $180,000 | - |
| Marien's Deli MN | - | 0 | - | - |
| Marietta Health Care Physicians, Inc. OH | - | 1 | $239,200 | - |
| Marietta Healthcare System OH | Healthcare & Social Assistance | 0 | - | C |
| Marietta Memorial Hospital OH | Healthcare & Social Assistance | 0 | - | C |
| Marimart, Inc. dba Woodland Hills Honda CA | - | 0 | - | - |
| Marimba Auto LLC MI | - | 1 | $104,395 | - |
| Marin Academy CA | Educational Services | 2 | $124,609 | - |
| Marin Airporter CA | Transportation & Warehousing | 0 | - | A |
| Marin General Hospital Corp (MarinHealth Medical Center) CA | Healthcare & Social Assistance | 0 | - | F |
| Marin General Hospital dba MarinHealth Medical Center CA | - | 0 | - | - |
| Marin Montessori School CA | Educational Services | 1 | $72,000 | - |
