| Market Square 220 TX | Retail Trade | 0 | — | A |
| Market Square Health Care Center, LLC ME | Healthcare & Social Assistance | 0 | — | F |
| Market Street Assisted Living, LLC OH | Healthcare & Social Assistance | 0 | — | F |
| Market Street Diner WI | — | 0 | — | — |
| Market Street Grill IN | Accommodation & Food Services | 0 | — | A |
| Market Street Inn Ltd MD | Accommodation & Food Services | 0 | — | F |
| Market Street Recycling TX | Wholesale Trade | 0 | — | C |
| Market Track, LLC IL | Professional & Technical Services | 4 | $126,243 | — |
| Market Track, LLC NY | — | 0 | — | — |
| MarketAxess Corporation NY | Professional & Technical Services | 6 | $162,167 | — |
| MarketBar Café Partners L.P. dba MarketBar CA | — | 0 | — | — |
| MarketCast, LLC CA | Professional & Technical Services | 1 | $133,760 | — |
| Marketech International Corporation USA AZ | Construction | 2 | $68,000 | B |
| Marketfare Foods AZ | — | 0 | — | — |
| Marketing Alliance Group GA | Manufacturing | 0 | — | A |
| Marketing Alliance Group Inc TN | Manufacturing | 0 | — | A |
| Marketing Alliance Samples Inc GA | Manufacturing | 0 | — | B |
| Marketing Associates, LLC MI | Professional & Technical Services | 1 | $116,382 | — |
| Marketing Associates, LLC dba OneMagnify MI | Professional & Technical Services | 11 | $112,067 | — |
| Marketing.com CA | — | 0 | — | — |
| Marketlink Inc MN | — | 0 | — | — |
| MarketOne Builders CA | Construction | 0 | — | F |
| Marketplace WA | Retail Trade | 0 | — | A |
| Marketplace at Avalon Park, LLC FL | Accommodation & Food Services | 0 | — | A |
| Marketplace Foods Albert Lea 2020 MN | — | 0 | — | — |
| MarketSB (Side Bar) CA | — | 0 | — | — |
| MarketSource NJ | — | 0 | — | — |
| MarketSource, Inc. GA | Professional & Technical Services | 1 | $184,548 | — |
| MarketWise Solutions, LLC MD | Information & Media | 4 | $295,021 | — |
| Markforged MA | Manufacturing | 0 | — | A |
| Markgraf Consulting, LLC WA | Professional & Technical Services | 1 | $132,599 | — |
| Markham Contracting Co., Inc. AZ | Construction | 0 | — | C |
| Markham Inc VA | Manufacturing | 0 | — | F |
| Markham Transfer & Recycling, LLC IL | Wholesale Trade | 0 | — | A |
| Marki Microwave Inc CA | Manufacturing | 0 | — | A |
| Markin Tubing NY | Manufacturing | 0 | — | F |
| Marking Alliance Samples GA | Manufacturing | 0 | — | D |
| Marking Services Inc. WI | Administrative & Waste Services | 0 | — | A |
| Markit North America, Inc. NY | Information & Media | 27 | $133,587 | — |
| Markit On Demand, Inc. CA | Professional & Technical Services | 2 | $131,183 | — |
| MARKITES INC. DE | Information & Media | 1 | $96,013 | — |
| Markley Rehabilitation and Healthcare Center PA | Healthcare & Social Assistance | 0 | — | F |
| Marklund IL | Healthcare & Social Assistance | 0 | — | F |
| Marklund Children's Home IL | Healthcare & Social Assistance | 0 | — | F |
| Marklund Hyde Center IL | Healthcare & Social Assistance | 0 | — | D |
| Markman Peat IA | Manufacturing | 0 | — | A |
| Markman Peat IL | Manufacturing | 0 | — | A |
| Markman Peat IN | Manufacturing | 0 | — | A |
| Markman Peat MI | Manufacturing | 0 | — | A |
| Markman Peat LaPorte IN | Retail Trade | 0 | — | A |
