| Monongahela Power Company WV | Utilities | 0 | — | D |
| Monongalia County Coal Company WV | — | 0 | — | — |
| Monongalia County Coal Resources, Inc. WV | — | 0 | — | — |
| Monongalia County General Hospital Company WV | Healthcare & Social Assistance | 4 | $438,494 | — |
| Monongalia County Resources, Inc PA | — | 0 | — | — |
| Monongalia General Hospital WV | Healthcare & Social Assistance | 0 | — | D |
| Monopile, LLC OH | Transportation & Warehousing | 0 | — | A |
| Monosol, LLC IN | Manufacturing | 0 | — | A |
| Monotype Imaging Inc. MA | Professional & Technical Services | 1 | $190,000 | — |
| Monozukuri Ventures, Inc. NY | Professional & Technical Services | 2 | $120,000 | — |
| Monroe Ambulance NY | Healthcare & Social Assistance | 0 | — | F |
| Monroe Assisted Care Center L.C. dba St. Joseph Assisted Living Center LA | Healthcare & Social Assistance | 0 | — | A |
| Monroe Bank & Trust MI | — | 0 | — | — |
| Monroe Bank (Division of Old National Bank) IN | — | 0 | — | — |
| Monroe Bartels Inc IL | Construction | 0 | — | F |
| Monroe Capital LLC IL | Finance & Insurance | 1 | $85,000 | — |
| Monroe Care Center IA | — | 0 | — | — |
| Monroe City Manor Care Center MO | Healthcare & Social Assistance | 0 | — | F |
| Monroe City Sheltered Workshop MO | Educational Services | 0 | — | F |
| Monroe Community Hospital NY | Healthcare & Social Assistance | 0 | — | F |
| Monroe Construction, Inc. CA | Construction | 0 | — | F |
| Monroe Continuing Care Center L.C. dba St. Joseph Continuing Care Center LA | Healthcare & Social Assistance | 0 | — | B |
| Monroe County IL | Public Administration | 0 | — | C |
| Monroe County Automotive Services Inc. (5 locations) NY | — | 0 | — | — |
| MONROE COUNTY COMMUNITY SCHOOL CORPORATION IN | Transportation & Warehousing | 0 | — | B |
| Monroe County Community School Corporation Transportation Center IN | Transportation & Warehousing | 0 | — | A |
| Monroe County Electric Cooperative, Inc. IL | Utilities | 0 | — | A |
| Monroe County Government IN | Public Administration | 0 | — | A |
| Monroe County Hospital GA | Construction | 0 | — | A |
| Monroe County Medical Center KY | Healthcare & Social Assistance | 0 | — | F |
| Monroe County Operating LLC OH | Healthcare & Social Assistance | 0 | — | F |
| Monroe Dental Studio PC NJ | Healthcare & Social Assistance | 1 | $156,000 | — |
| Monroe Energy, LLC PA | Manufacturing | 0 | — | A |
| monroe health services WI | Healthcare & Social Assistance | 0 | — | C |
| Monroe Integro, LLC CT | Manufacturing | 0 | — | F |
| Monroe Kut Interiors LLC MS | Construction | 0 | — | A |
| Monroe Mold LLC MI | Manufacturing | 0 | — | A |
| Monroe Operations, LLC dba Newport Academy CA | — | 0 | — | — |
| Monroe Operations, LLC dba Newport Healthcare CA | — | 0 | — | — |
| Monroe Piping & Sheet Metal, LLC NY | Construction | 0 | — | F |
| Monroe pping & sheet Metal ll NY | Construction | 0 | — | F |
| Monroe Processing, LLC MI | Manufacturing | 0 | — | A |
| Monroe Publishing Company MI | — | 0 | — | — |
| MONROE STREET GLASS INC., WA | Construction | 0 | — | F |
| Monroe Township Fire & Ambulance Protection District IL | Public Administration | 0 | — | A |
| Monroe Township Fire Protection District IL | Public Administration | 0 | — | A |
| Monroe Township School District NJ | Educational Services | 0 | — | F |
| Monroe Tractor & Implement Co Inc MA | Wholesale Trade | 0 | — | A |
| Monroe Tractor & Implement Co. Inc. NY | Wholesale Trade | 0 | — | D |
| Monroe-Gregg School District IN | Educational Services | 0 | — | C |
