| Marelli Cabin Comfort USA, Inc. MS | — | 0 | — | — |
| Marelli North America MS | Manufacturing | 0 | — | F |
| Marelli North America, Inc. MI | Manufacturing | 3 | $107,073 | — |
| Marelli North America, Inc. TN | Manufacturing | 1 | $78,733 | — |
| Marelli North Caolina USA LLC (formerly Magneti Marelli Powertrain USA LLC) NC | — | 0 | — | — |
| Maremont TN | — | 0 | — | — |
| Maren-go Solutions Corporation WA | Professional & Technical Services | 1 | $144,000 | A |
| MARENGO FABRICATED STEEL, LTD OH | Manufacturing | 0 | — | F |
| Marengo Fire Protection IL | Public Administration | 0 | — | A |
| Marengo Rescue Squad District IL | Healthcare & Social Assistance | 0 | — | A |
| Marex Services Inc. NY | Finance & Insurance | 6 | $1,185,833 | — |
| MARFEGA TRADING CO., INC MP | Real Estate | 1 | $35,360 | — |
| Marfred (Amcor Packaging Distribution) CA | — | 0 | — | — |
| Marg-Tiff Inc., DBA I.M. Services TX | Construction | 0 | — | A |
| Margaret F. Macias, Licensed Marriage and Family Therapist CA | Healthcare & Social Assistance | 1 | $83,200 | — |
| Margaret Mary Community Hospital (dba Margaret Mary Health) IN | — | 0 | — | — |
| Margaret Mary Health IN | Healthcare & Social Assistance | 0 | — | F |
| Margaret O'Leary Inc. CA | Manufacturing | 1 | $85,000 | — |
| Margaret Tietz Nursing and Rehabiliation Center NY | Healthcare & Social Assistance | 0 | — | D |
| Margaret Woodbury Strong Museum NY | Arts & Entertainment | 0 | — | C |
| Margaret's Cleaners CA | Other Services | 0 | — | F |
| Margaret's Dry Cleaning, Inc. CA | Other Services | 0 | — | A |
| Margaret's DryCleaning, Inc. CA | Other Services | 0 | — | A |
| Margaretta Local School District OH | Educational Services | 0 | — | A |
| Margaritaville AZ | — | 0 | — | — |
| Margaritaville Casino MS | — | 0 | — | — |
| Margaritaville Hollywood Beach Resort FL | — | 0 | — | — |
| Margaritaville Hotel Nashville TN | — | 0 | — | — |
| Margaritaville Resort Casino LA | — | 0 | — | — |
| Margaritaville resort Palm Springs CA | — | 0 | — | — |
| Margaritaville Vacation Club by Wyndham VI | Accommodation & Food Services | 0 | — | D |
| Margate J Automotive Management, LLC FL | Retail Trade | 0 | — | B |
| Marge Carson, Inc. CA | — | 0 | — | — |
| MARGIN5 SOLUTIONS INC. NJ | Professional & Technical Services | 4 | $92,596 | — |
| Margiric Farm, LLC FL | Agriculture & Forestry | 0 | — | A |
| Marglen Industries GA | Manufacturing | 0 | — | F |
| Marguerite Concrete Inc MA | Construction | 0 | — | F |
| Mari Care LLC NJ | Healthcare & Social Assistance | 0 | — | F |
| Maria Droste Services of Colorado, Inc. CO | Healthcare & Social Assistance | 1 | $66,780 | — |
| MARIA E MARZO DDS PC NY | Healthcare & Social Assistance | 1 | $200,000 | — |
| Maria Health Care Center MD | — | 0 | — | — |
| Maria Joseph CCC PA | Healthcare & Social Assistance | 0 | — | F |
| Maria Joseph Manor PA | Healthcare & Social Assistance | 0 | — | F |
| Maria Lopez, LP NY | Real Estate | 0 | — | A |
| Maria Parham Health NC | Healthcare & Social Assistance | 0 | — | F |
| Maria Weston Chapman Middle School MA | Construction | 0 | — | A |
| Maria's Holding Corp. dba Maria's Italian Kitchen Inc. CA | — | 0 | — | — |
| Mariak CA | Manufacturing | 0 | — | A |
| Marian Center UT | Healthcare & Social Assistance | 0 | — | F |
| Marian Community Hospital, Outpatient Clinic I, II, Outpatient Center II, Endless Mountains Medical Clinic, Waymart Family Medical Center PA | — | 0 | — | — |
