| Markman Peat Morrison IL | Retail Trade | 0 | — | A |
| Marko Zaninovich, Inc. CA | Agriculture & Forestry | 0 | — | A |
| Markos/ Owens MO | Manufacturing | 0 | — | A |
| Markov Processes International, Inc. NJ | Professional & Technical Services | 1 | $93,015 | — |
| Markovitz Enterprises PA | Manufacturing | 0 | — | D |
| Markow Companies MA | Transportation & Warehousing | 0 | — | F |
| Markquart CDJRF, LLC WI | Retail Trade | 0 | — | F |
| Markquart Inc WI | Retail Trade | 0 | — | A |
| Markraft Cabinets LLC NC | Manufacturing | 0 | — | A |
| Marks Clearing and Grading NC | Construction | 0 | — | A |
| Marks Farms NY | Agriculture & Forestry | 0 | — | C |
| Marks Lumber MT | Manufacturing | 0 | — | F |
| Marks Metal Technology, INC OR | Manufacturing | 0 | — | A |
| Marks Miller Post & Pole MT | Manufacturing | 0 | — | A |
| Marksans Pharma Inc. NY | Manufacturing | 3 | $140,264 | — |
| Marksman Metals Co. Inc. MN | Manufacturing | 0 | — | F |
| Marksmen General Contractors, Inc TX | Construction | 0 | — | A |
| Marksons Pharma Inc. NY | Manufacturing | 1 | $98,384 | — |
| Markstein Beverage Company CA | Wholesale Trade | 0 | — | F |
| Markstein Sales Company CA | Manufacturing | 0 | — | F |
| Marlabs LLC NJ | Professional & Technical Services | 60 | $96,820 | — |
| Marlan Tool Inc PA | Manufacturing | 0 | — | A |
| MARLAND PLACE MA | Healthcare & Social Assistance | 0 | — | F |
| Marlar, Inc. MN | Manufacturing | 0 | — | F |
| Marlboro College VT | — | 0 | — | — |
| MARLBORO COUNTY SCHOOL DISTRICT SC | Educational Services | 2 | $76,681 | — |
| Marlboro Electric Cooperative, Inc. SC | Utilities | 0 | — | A |
| Marlboro Wire Ltd. IL | Manufacturing | 0 | — | A |
| MARLBOROUGH FOUNDRY INC MA | Manufacturing | 0 | — | F |
| Marlborough Grand Rental Station MA | Retail Trade | 0 | — | A |
| Marlborough Health & Rehabilitation CT | Healthcare & Social Assistance | 0 | — | F |
| Marlen International, Inc. MO | Manufacturing | 0 | — | C |
| Marley Lilly LLC SC | Retail Trade | 0 | — | A |
| Marley Precision MI | — | 0 | — | — |
| Marley's Monsters OR | Manufacturing | 0 | — | F |
| Marleylilly SC | Manufacturing | 0 | — | A |
| Marlin Engineering, Inc. FL | Professional & Technical Services | 1 | $86,320 | — |
| Marlin Mechanical Corporation AZ | Construction | 0 | — | F |
| Marlin Technologies, Inc WI | Manufacturing | 0 | — | F |
| Marlinspike Hall LLC dba The Jones NY | — | 0 | — | — |
| Marlon Dunn Contracting FL | Construction | 0 | — | F |
| Marlow Industries- II-VI TX | Manufacturing | 0 | — | A |
| Marlton Hotel Operating, LLC NY | — | 0 | — | — |
| Marlton Supermarket Inc. NJ | Retail Trade | 0 | — | A |
| Marlyn Nutraceuticals, Inc. AZ | Manufacturing | 0 | — | F |
| Marmalade Café LLC CA | — | 0 | — | — |
| Marmaxx Corporate MA | Retail Trade | 0 | — | A |
| Marmelo Bros Costruction MA | Construction | 0 | — | F |
| Marmen Energy Company SD | Manufacturing | 0 | — | F |
| marmetal PA | Wholesale Trade | 0 | — | A |
