| Mechanical Rubber Ohio, LLC OH | Manufacturing | 1 | $85,634 | A |
| Mechanical Rubber Products Co., Inc. NY | Manufacturing | 0 | — | A |
| Mechanical Sales and Systems, Inc. DBA Mechanical Sales Midwest OK | Wholesale Trade | 0 | — | A |
| Mechanical Sales Iowa, Inc. IA | Wholesale Trade | 0 | — | D |
| Mechanical Sales Midwest, Inc. KS | Wholesale Trade | 0 | — | A |
| Mechanical Sales Parts Iowa, Inc. IA | Wholesale Trade | 0 | — | A |
| Mechanical Sales Parts, Inc. NE | Wholesale Trade | 0 | — | A |
| Mechanical Sales Technologies, Inc. IL | Wholesale Trade | 0 | — | A |
| Mechanical Sales, Inc. NE | Wholesale Trade | 0 | — | C |
| Mechanical Servants, LLC dba Convenience Valet IL | — | 0 | — | — |
| Mechanical Service & Systems Inc. UT | Construction | 0 | — | C |
| Mechanical Service Co. Inc. VA | Construction | 0 | — | A |
| Mechanical Services Company AR | Construction | 0 | — | A |
| Mechanical Services, Inc. ME | Construction | 0 | — | F |
| Mechanical Solutions Inc; TW Constructors LLC; Fire Solutions Inc. Midwest Consulting & Services, LL MO | Construction | 0 | — | C |
| Mechanical Specialists, Inc. AK | Construction | 0 | — | A |
| Mechanical Supply Company LLC NC | Wholesale Trade | 0 | — | B |
| Mechanical Systems NE | Construction | 0 | — | A |
| Mechanical Systems Company TN | Construction | 0 | — | F |
| Mechanical Systems Inc KS | Construction | 0 | — | A |
| Mechanical Systems Inc MN | Construction | 0 | — | A |
| Mechanical Systems Inc WI | Construction | 0 | — | A |
| Mechanical Systems Testing and Balancing, Inc. VA | Construction | 0 | — | A |
| Mechanical Systems, Inc. KY | Construction | 0 | — | F |
| Mechanical Technologies Solution NC | Construction | 0 | — | A |
| MECHANICAL, PLUMBING AND HEATING, INC. IL | Construction | 0 | — | A |
| Mechanico LLC IA | Construction | 0 | — | A |
| Mechanics Bank CA | — | 0 | — | — |
| Mechanicsburg Senior Care, LLC PA | Healthcare & Social Assistance | 0 | — | F |
| Mechanix Wear LLC CA | — | 0 | — | — |
| Mechanix Wear LLC MO | Wholesale Trade | 0 | — | F |
| Mechatronics Inc WA | Wholesale Trade | 0 | — | A |
| Mechdyne Corporation CA | Manufacturing | 0 | — | F |
| Mechdyne Corporation IA | Manufacturing | 0 | — | A |
| Mechdyne Corporation IL | Manufacturing | 0 | — | C |
| Mechdyne Corporation MI | Professional & Technical Services | 0 | — | A |
| Meche Construction LLC LA | Construction | 0 | — | A |
| MechOne, Inc. CO | Construction | 0 | — | A |
| Mechoopda Casino CA | Arts & Entertainment | 0 | — | A |
| MechoShade Systems, LLC NJ | Manufacturing | 1 | $115,000 | — |
| Mechworks Mechanical Contractors, Inc. NC | Construction | 0 | — | D |
| Mecklenburg Electric Cooperative VA | Utilities | 0 | — | A |
| Mecklenburg Health and Rehabilitation NC | Healthcare & Social Assistance | 0 | — | F |
| Meckley Services Inc. VA | Construction | 0 | — | B |
| MECO TN | Manufacturing | 0 | — | F |
| MECS, Inc. CA | Manufacturing | 0 | — | F |
| MECS, Inc. MO | Manufacturing | 1 | $230,000 | — |
| Med For America CA | Manufacturing | 0 | — | A |
| Med Plus Staffing KY | Administrative & Waste Services | 0 | — | A |
| Med Valley Inc. PA | Professional & Technical Services | 2 | $72,835,000 | — |
