| Monte Vista Potato Growers Cooperative Association CO | Agriculture & Forestry | 0 | — | F |
| Monte Vista Water District CA | Utilities | 0 | — | F |
| Montebello Brands, Inc. MD | Manufacturing | 0 | — | F |
| Montebello Care Center CA | Healthcare & Social Assistance | 0 | — | F |
| Montebello Company LLC TX | Construction | 0 | — | A |
| Montebello Container Company, LLC CA | — | 0 | — | — |
| Montebello Packaging VA | Manufacturing | 0 | — | F |
| Montebello Plastics, LLC CA | Manufacturing | 0 | — | F |
| Montec Securities LLC NY | Finance & Insurance | 1 | $153,000 | — |
| Montecito Apartments NC | Real Estate | 0 | — | A |
| Montecito Club CA | Arts & Entertainment | 0 | — | F |
| Montecito Heights CA | Healthcare & Social Assistance | 0 | — | F |
| Montecito Heights Healthcare & Wellness Centre, LP CA | Healthcare & Social Assistance | 1 | $124,800 | — |
| Montecito Water District CA | Utilities | 0 | — | F |
| Montecito West Apartments NC | Real Estate | 0 | — | A |
| Montefino Ventilator Training CA | Healthcare & Social Assistance | 0 | — | A |
| Montefiore OH | Healthcare & Social Assistance | 0 | — | F |
| Montefiore Health System, Inc. NY | Healthcare & Social Assistance | 2 | $151,950 | — |
| Montefiore Housing Corporation OH | Healthcare & Social Assistance | 0 | — | F |
| MONTEFIORE MEDICAL CENTER NY | Healthcare & Social Assistance | 61 | $197,555 | — |
| Montefiore Medical Center - Pre hospital Care Department - North Division NY | — | 0 | — | — |
| Montefiore New Rochelle Hospital NY | Healthcare & Social Assistance | 2 | $120,067 | — |
| Montefiore St. Lukes Cornwall NY | Healthcare & Social Assistance | 0 | — | F |
| Montell Fabrication and Rebuild LLC NM | Manufacturing | 0 | — | D |
| Montello Care Center WI | Healthcare & Social Assistance | 0 | — | A |
| Monterey Bay Aquarium CA | Arts & Entertainment | 0 | — | D |
| Monterey Bay Aquarium Research Institute (MBARI) CA | Professional & Technical Services | 4 | $66,357 | — |
| Monterey Bay Boatworks CA | Manufacturing | 0 | — | F |
| Monterey Bay Farms, LLC CA | Agriculture & Forestry | 0 | — | A |
| Monterey Bay Hospitality, LLC AZ | Accommodation & Food Services | 0 | — | F |
| MONTEREY BAY NURSERY INC CA | Agriculture & Forestry | 0 | — | D |
| Monterey Bay Oncology dba Pacific Cancer Care CA | Healthcare & Social Assistance | 0 | — | A |
| Monterey Boats FL | Manufacturing | 0 | — | A |
| Monterey Care Center CA | Healthcare & Social Assistance | 0 | — | F |
| Monterey City Disposal Service Inc. CA | Administrative & Waste Services | 0 | — | F |
| Monterey County Office of Education CA | Educational Services | 2 | $60,745 | B |
| Monterey County Sheriff's Office CA | Public Administration | 0 | — | F |
| Monterey Court OR | Healthcare & Social Assistance | 0 | — | F |
| Monterey Court Memory Care OR | Healthcare & Social Assistance | 0 | — | F |
| Monterey Fuel Company, LLC CA | Transportation & Warehousing | 0 | — | A |
| Monterey Gormet Foods WA | — | 0 | — | — |
| Monterey King Labor, Inc. CA | Agriculture & Forestry | 0 | — | A |
| Monterey Marriott CA | Accommodation & Food Services | 0 | — | F |
| Monterey Mechanical Co. CA | Construction | 0 | — | D |
| Monterey Mushrooms IL | Agriculture & Forestry | 0 | — | B |
| Monterey Mushrooms TN | Agriculture & Forestry | 0 | — | A |
| Monterey Mushrooms LLC FL | Agriculture & Forestry | 0 | — | F |
| Monterey Mushrooms, LLC CA | Agriculture & Forestry | 0 | — | B |
| Monterey Mushrooms, LLC. PA | Agriculture & Forestry | 0 | — | C |
| Monterey Mushrooms, LLC. TX | Agriculture & Forestry | 0 | — | A |
