| Muenster Memorial Hospital TX | Healthcare & Social Assistance | 2 | $56,420 | — |
| Muenster Milling TX | Manufacturing | 0 | — | F |
| Mueon Corporation CA | Manufacturing | 1 | $160,000 | — |
| Mueser Rutledge Consulting Engineers PLLC NY | Professional & Technical Services | 1 | $117,000 | — |
| Muetzel Plumbing & Heating Co. OH | Construction | 0 | — | A |
| MUFG Bank, Ltd. NY | Finance & Insurance | 46 | $148,437 | — |
| MUFG Investor Services (US), LLC (MUIS) MD | — | 0 | — | — |
| MUFG Securities Americas, Inc. NY | Finance & Insurance | 3 | $149,333 | — |
| MUFG Union Bank N.A. NY | Finance & Insurance | 2 | $146,500 | — |
| MUFG Union Bank, N.A. CA | — | 0 | — | — |
| Mugele MI | Transportation & Warehousing | 0 | — | A |
| MUGU RANCH PARTNERSHIP CA | Agriculture & Forestry | 0 | — | F |
| Muhlenberg Area Ambulance Association PA | Healthcare & Social Assistance | 0 | — | F |
| Muhlenberg County Medical INC KY | Retail Trade | 0 | — | A |
| MUHS UNLIMITED, INC. NE | Construction | 0 | — | A |
| MUI & ASSOCIATES LTD. NY | Professional & Technical Services | 1 | $71,136 | — |
| Muir Omni Graphics IL | Manufacturing | 0 | — | A |
| Muir-Chase Plumbing Co., Inc. CA | Construction | 0 | — | B |
| Muirhead Trucking Inc TX | Transportation & Warehousing | 0 | — | D |
| MUJI U.S.A. NY | — | 0 | — | — |
| MUJI U.S.A. Limited dba MUJI Hollywood CA | — | 0 | — | — |
| MUJI U.S.A. Limited dba MUJI San Jose CA | — | 0 | — | — |
| MUJI U.S.A. Limited dba MUJI Santa Anita CA | — | 0 | — | — |
| MUJI U.S.A. Limited dba MUJI Santa Monica & MUJI Third Street CA | — | 0 | — | — |
| MUJI U.S.A. Limited dba MUJI Soma CA | — | 0 | — | — |
| MUJI U.S.A. Limited dba MUJI Stanford CA | — | 0 | — | — |
| Mujin Corp. GA | Professional & Technical Services | 3 | $109,318 | — |
| MUKE GROUP INC. NJ | Professional & Technical Services | 2 | $93,091 | — |
| Mukilteo Water and Wastewater District WA | Utilities | 0 | — | A |
| Mulberry Health IN | Healthcare & Social Assistance | 0 | — | F |
| Mulberry Manor TX | Healthcare & Social Assistance | 0 | — | F |
| Mulberry Metal Products, Inc. NJ | Manufacturing | 0 | — | F |
| Mulberry Street Management WV | Healthcare & Social Assistance | 0 | — | B |
| Mulberry Street Management Services WV | Healthcare & Social Assistance | 0 | — | C |
| Mulcahy Nickolaus MN | Construction | 0 | — | D |
| Mulch Manufacturing Inc FL | Manufacturing | 0 | — | F |
| Mulch Manufacturing Inc. GA | Manufacturing | 0 | — | A |
| Mulchworx IN | Administrative & Waste Services | 0 | — | A |
| Mule Creek State Prison - CDCR CA | Public Administration | 0 | — | F |
| Mule Hide Manufacturing WI | Manufacturing | 0 | — | F |
| Mule Restaurant Group TX | — | 0 | — | — |
| MuleCo, Inc OH | Transportation & Warehousing | 0 | — | C |
| Mulehead Growers, LLC CA | Manufacturing | 0 | — | F |
| Mulford Construction Co., Inc. MD | Construction | 0 | — | D |
| Mulford Plumbing & Heating IA | Construction | 0 | — | D |
| Mulherin Acquisition Company LLC GA | Manufacturing | 0 | — | F |
| Mulherin's Pizzeria PA | — | 0 | — | — |
| Mulholland Citrus CA | Agriculture & Forestry | 0 | — | A |
| Mulholland Energy Services TX | Mining & Extraction | 0 | — | D |
| Mulkey Enterprises Inc. GA | Construction | 0 | — | A |
