| McLaren Medical Group MI | - | 0 | - | - |
| McLaren Northern Michigan MI | Manufacturing | 0 | - | F |
| Mclaren Oakland MI | Healthcare & Social Assistance | 0 | - | F |
| McLaren Performance Technologies MI | Manufacturing | 2 | $98,946 | - |
| McLaren Regional Medical Center MI | Healthcare & Social Assistance | 0 | - | F |
| McLaren St. Luke's OH | Healthcare & Social Assistance | 0 | - | F |
| McLaren St. Luke's Hospital OH | - | 0 | - | - |
| McLaren Strategic Solutions US Inc CA | Professional & Technical Services | 1 | $130,000 | - |
| McLaren WellCare Clinics OH | - | 0 | - | - |
| Mclarty Associates LLC DC | Professional & Technical Services | 1 | $79,830 | - |
| McLaughlin & Moran, Inc. RI | Wholesale Trade | 0 | - | F |
| Mclaughlin School District 15-2 SD | Educational Services | 1 | $43,470 | - |
| MCLB Barstow CA | Transportation & Warehousing | 0 | - | A |
| McLean Affiliates CT | Healthcare & Social Assistance | 0 | - | F |
| McLean County Government IL | Administrative & Waste Services | 0 | - | D |
| McLean County Unit District No. 5 IL | Educational Services | 1 | $47,656 | - |
| McLean Hospital MA | Healthcare & Social Assistance | 9 | $71,295 | - |
| McLean Packaging Corp. PA | Manufacturing | 0 | - | F |
| McLendon Enterprises, Inc. GA | Construction | 0 | - | F |
| McLendon Hardware WA | Retail Trade | 0 | - | C |
| McLendon's WA | Retail Trade | 0 | - | D |
| McLeod Construction LLC WA | Construction | 0 | - | F |
| McLeod County MN | Professional & Technical Services | 0 | - | F |
| Mcleod Express, LLC IL | Transportation & Warehousing | 0 | - | C |
| McLeod Health SC | Healthcare & Social Assistance | 0 | - | C |
| McLeod Regional Medical Center of the Pee Dee, Inc. SC | Healthcare & Social Assistance | 2 | $266,573 | - |
| MCM Electronics Inc OH | - | 0 | - | - |
| MCM Marine, Inc. MI | Construction | 0 | - | F |
| MCM Quality Systems, Inc. MI | Professional & Technical Services | 1 | $113,547 | - |
| McMahon Contracting and Construction LLC. TX | Construction | 0 | - | F |
| Mcmahon Martine And Gallagher LLP NY | Professional & Technical Services | 1 | $154,000 | - |
| McMahon Tire Service Inc. IN | Manufacturing | 0 | - | F |
| McMaster-Carr Supply Company CA | Wholesale Trade | 0 | - | F |
| McMaster-Carr Supply Company GA | Wholesale Trade | 0 | - | F |
| McMaster-Carr Supply Company IL | Wholesale Trade | 0 | - | C |
| McMaster-Carr Supply Company NJ | Wholesale Trade | 0 | - | B |
| McMaster-Carr Supply Company OH | Wholesale Trade | 0 | - | C |
| McMenamin Family ShopRite INC PA | Retail Trade | 0 | - | D |
| McMichael Mills, Inc. NC | - | 0 | - | - |
| McMillan Data Communications CA | Construction | 0 | - | F |
| McMillan Electric CA | Construction | 0 | - | F |
| McMillan Electric Company WI | Manufacturing | 0 | - | F |
| McMinnville Manufacturing, LLC TN | Manufacturing | 0 | - | D |
| MCN Build, Inc. DC | Construction | 1 | $115,000 | D |
| McNairy Hospital Corporation TN | - | 0 | - | - |
| McNamara-Salvia, Inc. MA | Professional & Technical Services | 2 | $80,000 | - |
| McNational, Inc. OH | Manufacturing | 0 | - | F |
| McNaughton-McKay Electric Company MI | Wholesale Trade | 0 | - | A |
| McNeal Professional Services, Inc. GA | Professional & Technical Services | 2 | $71,032 | - |
| McNeely Plastics Products MS | Manufacturing | 0 | - | D |
