| MacDermid Graphic Solutions TN | Manufacturing | 0 | — | A |
| MacDermid Graphis Solutions - Atlanta GA | Manufacturing | 0 | — | A |
| MacDermid, Incorporated CT | Manufacturing | 1 | $105,000 | — |
| MacDermid, Incorporated MN | Manufacturing | 0 | — | F |
| Macdonald & Cody CA | Professional & Technical Services | 0 | — | A |
| MacDonald & Owen Lumber Co. KY | Wholesale Trade | 0 | — | F |
| MacDonald & Owen Lumber Co. PA | Wholesale Trade | 0 | — | F |
| MacDonald & Owen Lumber Co. WI | Wholesale Trade | 0 | — | D |
| Macdougal Restaurant dba Off The Wagon NY | — | 0 | — | — |
| MACDOUGALL PIERCE CONSTRUCTION INC IN | Construction | 0 | — | A |
| MacDougalls' Cape Cod Marine Service Inc MA | Arts & Entertainment | 0 | — | F |
| Macedos Construction LLC NJ | Construction | 0 | — | F |
| MacFarlane Energy MA | Retail Trade | 0 | — | B |
| Macgregor USA WA | Manufacturing | 0 | — | F |
| MacGregor USA Inc. AK | Other Services | 0 | — | A |
| MacGregor USA Inc. TX | Other Services | 0 | — | A |
| MacGregor USA Inc. VA | Other Services | 0 | — | A |
| Mach 2000 Technologies, Inc. NY | Professional & Technical Services | 5 | $83,200 | — |
| Mach 5 Aviation Inc. CA | Transportation & Warehousing | 0 | — | A |
| Mach 5 Delivery NJ | Transportation & Warehousing | 0 | — | C |
| Mach 5 Delivery NY | Transportation & Warehousing | 0 | — | A |
| Mach B Technologies Inc TX | Information & Media | 2 | $84,094 | — |
| Mach Energy NY | Information & Media | 1 | $135,000 | — |
| Mach Energy Service, LLC OK | Construction | 0 | — | A |
| Mach Energy Services LLC OK | Construction | 0 | — | B |
| Mach Industrial Group TX | Manufacturing | 0 | — | F |
| Mach Machines LLC OH | Manufacturing | 1 | $103,000 | — |
| MACHADO & SONS CONSTRUCTION, INC. CA | Construction | 0 | — | F |
| Machado Backhoe, Inc. CA | Construction | 0 | — | A |
| MACHADO CONSTRUCTION MD | Construction | 0 | — | A |
| MACHADO FARM SERVICE LLC CA | Agriculture & Forestry | 0 | — | A |
| MACHADO FARM SERVICES, LLC CA | Agriculture & Forestry | 0 | — | C |
| Machaon Diagnostics, Inc. CA | Healthcare & Social Assistance | 1 | $67,496 | — |
| Machete MN | — | 0 | — | — |
| Machias ME | Healthcare & Social Assistance | 0 | — | F |
| Machine and other job shop work KY | Manufacturing | 0 | — | A |
| Machine and Welding of Danbury Inc. NC | Manufacturing | 0 | — | F |
| Machine Components Corp NY | Manufacturing | 0 | — | F |
| Machine Concepts Inc OH | Manufacturing | 0 | — | A |
| Machine Dynamics & Engineering OH | Manufacturing | 0 | — | D |
| Machine Intelligence Research Institute CA | Professional & Technical Services | 2 | $160,000 | — |
| MACHINE INTELLIGENCE TECHNOLOGIES LLC NE | Professional & Technical Services | 4 | $55,817 | — |
| MACHINE INTELLIGENCE TECHNOLOGIES LLC TX | Professional & Technical Services | 1 | $80,850 | — |
| Machine Laboratory KS | — | 0 | — | — |
| Machine Laboratory, LLC MO | — | 0 | — | — |
| MACHINE LEARNING TECHNOLOGIES LLC NE | Professional & Technical Services | 8 | $83,070 | — |
| MACHINE LEARNING TECHNOLOGIES LLC OK | Professional & Technical Services | 1 | $57,762 | — |
| MACHINE LEARNING TECHNOLOGIES LLC TX | Professional & Technical Services | 18 | $88,967 | — |
| Machine Sciences Corporation OR | Manufacturing | 0 | — | C |
| Machine Service, Inc. WI | Manufacturing | 0 | — | D |
