| M & W EXCAVATION COMPANY, INC. KY | Construction | 0 | — | F |
| M & W Fiberglass, Inc OR | Manufacturing | 0 | — | A |
| M & W Manufacturing IA | Manufacturing | 0 | — | F |
| M A Beech Group PA | Construction | 0 | — | A |
| M A BONGIOVANNI, INC. NY | Construction | 0 | — | F |
| M A Long Construction CA | Construction | 0 | — | A |
| M A Mortenson Company AZ | Construction | 0 | — | A |
| M A Mortenson Company CA | Construction | 0 | — | A |
| M A Mortenson Company CO | Construction | 0 | — | A |
| M A Mortenson Company FL | Construction | 0 | — | A |
| M A Mortenson Company GA | Construction | 0 | — | A |
| M A Mortenson Company IA | Construction | 0 | — | A |
| M A Mortenson Company IL | Construction | 0 | — | B |
| M A Mortenson Company IN | Construction | 0 | — | F |
| M A Mortenson Company MN | Construction | 0 | — | A |
| M A Mortenson Company MO | Construction | 0 | — | A |
| M A Mortenson Company ND | Construction | 0 | — | F |
| M A Mortenson Company NE | Construction | 0 | — | A |
| M A Mortenson Company OH | Construction | 0 | — | F |
| M A Mortenson Company OK | Construction | 0 | — | C |
| M A Mortenson Company OR | Construction | 0 | — | B |
| M A Mortenson Company TX | Construction | 0 | — | B |
| M A Mortenson Company UT | Construction | 0 | — | A |
| M A Mortenson Company VA | Construction | 0 | — | F |
| M A Mortenson Company WA | Construction | 0 | — | C |
| M A Mortenson Company WI | Construction | 0 | — | D |
| M A Mortenson Company WV | Construction | 0 | — | A |
| M A Mortenson Company WY | Construction | 0 | — | A |
| M A Patout LA | Manufacturing | 0 | — | F |
| M A S INDUSTRIES INC WI | Manufacturing | 0 | — | F |
| M Abraham Floor Covering LLC PA | Construction | 1 | $241,238 | — |
| M and B Services LLC PA | Construction | 0 | — | F |
| M and C Beare Inc CA | Retail Trade | 0 | — | A |
| M and G Polymers USA LLC OH | — | 0 | — | — |
| M and R Company CA | Agriculture & Forestry | 0 | — | F |
| M and S Enterprise LLC CA | Transportation & Warehousing | 0 | — | F |
| M and W Power Group LLC TX | Construction | 0 | — | A |
| M Argueso & Co dba Paramelt CA | Manufacturing | 0 | — | D |
| M Argueso & Co dba Paramelt MI | Manufacturing | 0 | — | F |
| M Argueso & Co dba Paramelt OH | Manufacturing | 0 | — | F |
| M Bar C Construction, Inc. CA | Construction | 0 | — | F |
| M Brashem IN | Manufacturing | 0 | — | F |
| M Brett Painting Company, Inc. CT | Construction | 0 | — | A |
| M C Parcel Delivery, Inc. WA | Transportation & Warehousing | 0 | — | A |
| M Cannon Roofing Co., LLC IL | Construction | 0 | — | A |
| M Concrete MD | Construction | 0 | — | A |
| M Construction Group, LLC OH | Professional & Technical Services | 0 | — | A |
| M Contractors, LLC TX | Construction | 0 | — | A |
| M CROWD RESTAURANT GROUP OK | Accommodation & Food Services | 0 | — | F |
| M CROWD RESTAURANT GROUP TX | Accommodation & Food Services | 0 | — | C |
