| M3 Technology Group TN | Construction | 0 | — | F |
| M3 West, Inc. CA | Agriculture & Forestry | 0 | — | D |
| M3, Inc. VA | Construction | 0 | — | A |
| M3BI LLC AZ | Professional & Technical Services | 21 | $116,724 | — |
| M3F, Inc. UT | Finance & Insurance | 1 | $120,000 | — |
| M3IOX LLC TX | Professional & Technical Services | 2 | $92,500 | — |
| M3SIM LLC IN | Professional & Technical Services | 1 | $124,560 | — |
| M3T Corporation PA | Administrative & Waste Services | 0 | — | A |
| M4 Engineering LLC NV | Construction | 0 | — | A |
| M4 Phoenix Biltmore Tenant LLC AZ | Accommodation & Food Services | 0 | — | A |
| M4D LLC CA | Manufacturing | 0 | — | F |
| M5 Delivery LLC AZ | Transportation & Warehousing | 0 | — | F |
| M5 STEEL CA | Manufacturing | 0 | — | A |
| M56 LLC d/b/a Ma Peche NY | — | 0 | — | — |
| M5DEV CA | Accommodation & Food Services | 0 | — | F |
| M6 Contracting, Inc. NC | Construction | 0 | — | F |
| M7Aerospace, LLC TX | Manufacturing | 0 | — | C |
| M7D Corp, dba WD Lab Grown Diamonds MD | Manufacturing | 0 | — | A |
| M9 Consulting, Inc. TX | Professional & Technical Services | 12 | $112,852 | — |
| M9 Solutions, LLC VA | Professional & Technical Services | 0 | — | A |
| Ma AL | Manufacturing | 0 | — | F |
| MA Dog and Cat LLC MA | — | 0 | — | — |
| ma grocery comapny inc CA | Retail Trade | 0 | — | D |
| MA LABORATORIES, INC. CA | Wholesale Trade | 3 | $69,048 | — |
| MA LABORTARIES, INC. CA | Wholesale Trade | 0 | — | B |
| MA LABORTARIES, INC. FL | Wholesale Trade | 0 | — | A |
| MA LABORTARIES, INC. GA | Wholesale Trade | 0 | — | A |
| MA LABORTARIES, INC. IL | Wholesale Trade | 0 | — | A |
| MA LABORTARIES, INC. NJ | Wholesale Trade | 0 | — | A |
| MA Medina Farm Labor Services, Inc CA | Agriculture & Forestry | 0 | — | B |
| MA Metal IN | Retail Trade | 0 | — | A |
| MA Rebar Services IL | Construction | 0 | — | A |
| MA TECHNOLOGIES LLC TX | Professional & Technical Services | 1 | $112,923 | — |
| MA United Corp NJ | Professional & Technical Services | 1 | $115,918 | — |
| MA1 Logistics, Inc. CA | Transportation & Warehousing | 0 | — | F |
| MAAC Machinery Co, Inc IL | Manufacturing | 0 | — | F |
| MAAG Reduction, Inc. OH | Manufacturing | 0 | — | A |
| MAAGSOFT INC NY | Professional & Technical Services | 2 | $99,549 | — |
| Maakay Group, LLC MD | Administrative & Waste Services | 1 | $78,146 | — |
| Maantic, Inc. CA | Professional & Technical Services | 14 | $157,786 | — |
| MAAS Aviation Brookley Inc. AL | Construction | 0 | — | F |
| Maas Brothers Construction Co., Inc. WI | Construction | 0 | — | A |
| Maas Energy Works, LLC CA | Manufacturing | 1 | $75,000 | A |
| MAAS NURSERY, INC. TX | Retail Trade | 0 | — | F |
| Maaschhoff's NE | — | 0 | — | — |
| Maass Corporation SPC CA | Retail Trade | 0 | — | F |
| Maax Bath AZ | Manufacturing | 0 | — | F |
| Maax Bath GA | Manufacturing | 0 | — | F |
| Maax Bath IN | Manufacturing | 0 | — | C |
| Maax Bath WA | Manufacturing | 0 | — | F |
