| McGowan Painting Contractors of Greenville, LLC NC | Construction | 0 | — | A |
| McGrath & Associates Inc MO | Construction | 0 | — | B |
| McGrath Automotive Group (DBA: McGrath Acura of Libertyville) IL | Retail Trade | 0 | — | B |
| McGrath Automotive Group (DBA: McGrath Acura of Morton Grove) IL | Retail Trade | 0 | — | B |
| McGrath Automotive Group (DBA: McGrath Audi of Morton Grove) IL | Retail Trade | 0 | — | A |
| McGrath Automotive Group (DBA: McGrath Honda of Elgin) IL | Retail Trade | 0 | — | A |
| McGrath Automotive Group (DBA: McGrath Honda of St Charles) IL | Retail Trade | 0 | — | B |
| McGrath Automotive Group (DBA: McGrath Volvo Cars of Barrington) IL | Retail Trade | 0 | — | B |
| McGrath Automotive Group (DBA: McGrath Volvo Cars of Fort Myers) FL | Retail Trade | 0 | — | A |
| McGrath Electric Inc. CA | Construction | 0 | — | C |
| McGrath Five INC CA | Retail Trade | 0 | — | B |
| McGrath RentCorp CA | Real Estate | 2 | $163,809 | B |
| McGraw Hill IA | — | 0 | — | — |
| McGraw Hill LLC OH | Educational Services | 8 | $164,510 | — |
| McGraw-Hill Companies, Inc IA | — | 0 | — | — |
| McGraw-Hill Education CA | — | 0 | — | — |
| McGraw-Hill Education IN | — | 0 | — | — |
| McGraw-Hill Education MO | — | 0 | — | — |
| McGregor Door & Hardware, LLC WA | Wholesale Trade | 0 | — | F |
| McGregor Industrial Steel Fabrication, Inc. MS | Manufacturing | 0 | — | A |
| McGregor Metal OH | Manufacturing | 0 | — | F |
| McGregor Metalworking Companies OH | Manufacturing | 0 | — | F |
| McGregor PACE OH | Healthcare & Social Assistance | 0 | — | F |
| McGregor School District MN | Educational Services | 0 | — | F |
| McGriff Industries, Inc. AL | Manufacturing | 0 | — | F |
| McGriff Tire Company, Inc. AL | Retail Trade | 0 | — | A |
| McGriff Tire Company, Inc. TN | Retail Trade | 0 | — | A |
| McGrory Glass, Inc. NJ | Manufacturing | 0 | — | F |
| McGuffey Healthcare AL | Healthcare & Social Assistance | 0 | — | F |
| MCGUIRE AND HESTER CA | Construction | 0 | — | B |
| McGuire Contracting, Inc. CA | Construction | 0 | — | F |
| McGuire Memorial PA | Healthcare & Social Assistance | 0 | — | F |
| McGuire Moorman Hospitality LLC TX | Accommodation & Food Services | 1 | $65,000 | A |
| McGuire's Beautiful Outdoors, Inc. FL | Administrative & Waste Services | 0 | — | F |
| McGuireWoods LLP VA | Professional & Technical Services | 2 | $250,000 | — |
| McGuirk Sand and Gravel Inc MI | Construction | 0 | — | A |
| MCH - 58 Baribeau ME | Healthcare & Social Assistance | 0 | — | F |
| MCH Electric CA | Construction | 0 | — | D |
| McHale McHale Landscape Design MD | Administrative & Waste Services | 0 | — | F |
| McHenry Community High School District 156 IL | Educational Services | 0 | — | B |
| McHenry County College IL | Educational Services | 0 | — | A |
| McHenry County Conservation District IL | Arts & Entertainment | 0 | — | A |
| McHenry Industries OH | Manufacturing | 0 | — | D |
| McHenry Township Fire Protection District IL | Public Administration | 0 | — | B |
| McHone Industries West UT | Construction | 0 | — | A |
| McHone Industries, Inc. NY | Manufacturing | 0 | — | F |
| McHugh Concrete Construction, Inc. IL | Construction | 0 | — | F |
| McHugh Engineering Group LLC IL | Professional & Technical Services | 1 | $133,900 | — |
| McHugh Enterprises Inc. IL | Construction | 0 | — | A |
| McHugh POrter Builders, Inc. FL | Construction | 0 | — | A |
