| Macallister Machinery LLC IN | Other Services | 0 | - | A |
| Macallister Machinery LLC MI | Other Services | 0 | - | A |
| Macannie MD | Professional & Technical Services | 3 | $180,000 | - |
| Macapa Logistics IA | Administrative & Waste Services | 0 | - | - |
| Macar & Sons, Inc FL | Wholesale Trade | 1 | $117,562 | - |
| MacArthur Company IA | Manufacturing | 0 | - | F |
| MacArthur Park Corporation dba MacArthur Park Restaurant CA | - | 0 | - | - |
| Macco's Floor Covering Center, Inc. WI | Retail Trade | 0 | - | D |
| Maccormack Plumbing, INC. MA | Construction | 0 | - | F |
| MacDermid, Incorporated CT | Manufacturing | 1 | $105,000 | - |
| 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 | - | - |
| Mace North America Ltd NY | - | 6 | $137,150 | - |
| Mach 2000 Technologies, Inc. NY | Professional & Technical Services | 13 | $101,733 | - |
| Mach B Technologies Inc TX | Information & Media | 2 | $84,094 | - |
| Mach Energy NY | Information & Media | 1 | $135,000 | - |
| Mach Industries Inc. CA | - | 2 | $350,000 | - |
| Mach Machines LLC OH | Manufacturing | 1 | $103,000 | - |
| Machaon Diagnostics, Inc. CA | Healthcare & Social Assistance | 1 | $67,496 | - |
| Machete MN | - | 0 | - | - |
| Machine Intelligence LLC TX | - | 51 | $85,467 | - |
| 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 Specialties LLC NC | Manufacturing | 2 | $88,941 | B |
| Machine Zone, Inc. CA | - | 1 | $135,000 | - |
| Machinery Intelligence Inc CA | - | 2 | $150,000 | - |
| Machinery Marketing International IL | - | 1 | $185,000 | - |
| Machinify, Inc. CA | Professional & Technical Services | 11 | $184,226 | - |
| Machinify, Inc. TX | - | 11 | $178,506 | - |
| Machinima NU, LLC CA | - | 0 | - | - |
| Machinima, Inc. CA | - | 0 | - | - |
| Machint Solutions, LLC IL | Professional & Technical Services | 1 | $108,080 | - |
| MachMotion LLC MO | Manufacturing | 1 | $88,754 | - |
| Machu Picchu Energy LLC CA | Manufacturing | 5 | $210,080 | - |
| Machupicchu Restaurant LLC RI | Accommodation & Food Services | 1 | $67,496 | - |
| Macias Gini & O'Connell LLP CA | Professional & Technical Services | 12 | $100,676 | - |
| Macias Gini & O'Connell LLP CA | - | 14 | $86,382 | - |
| MacInnis Group, LLC PA | Manufacturing | 0 | - | F |
| MacIntosh Linen & Uniform, Inc. PA | Other Services | 0 | - | B |
| Mack Energy Corporation NM | Agriculture & Forestry | 0 | - | D |
| Mack Industries FL | Manufacturing | 0 | - | F |
| Mack Industries MI | Manufacturing | 0 | - | F |
| Mack Industries OH | Manufacturing | 0 | - | F |
