| M. J. Electric LLC MI | Construction | 0 | - | B |
| M. Lipsitz & Co., Ltd. TX | Wholesale Trade | 0 | - | F |
| M. Ludvik Engineering PC NY | Professional & Technical Services | 1 | $89,000 | - |
| M. Price Distributing Company VA | Transportation & Warehousing | 0 | - | F |
| M. R. Tudor - California, Inc. CA | Real Estate | 2 | $87,500 | - |
| M. Shiroma Painting Co., Inc. HI | Construction | 4 | $52,380 | - |
| M. Slavin & Sons, Ltd. NY | - | 0 | - | - |
| M.A. Ford Manufacturing Company Inc IA | Manufacturing | 0 | - | F |
| M.A. Patout & Son Limited, LLC LA | Manufacturing | 0 | - | A |
| M.AI Unbound INC CA | - | 1 | $175,000 | - |
| M.AI Unbound, INC. CA | Professional & Technical Services | 1 | $190,000 | - |
| M.C. Dean, Inc. VA | Professional & Technical Services | 20 | $122,927 | C |
| M.C. Dean, Inc. VA | - | 10 | $118,500 | - |
| M.C. Paulino, Inc. GU | Construction | 1 | $52,000 | - |
| M.C. Paulino, INC. GU | - | 1 | $53,622 | - |
| M.D. Service Plumbing, Inc CO | Construction | 0 | - | F |
| M.E. Flow VA | Construction | 0 | - | F |
| M.E. Fox & Company, Inc. CA | - | 0 | - | - |
| M.G. Design Associates Corporation FL | - | 0 | - | - |
| M.G. Design Associates Corporation WI | - | 0 | - | - |
| M.G. Oil Company, Inc. SD | Retail Trade | 0 | - | A |
| M.G. Waldbaum Company MN | Manufacturing | 1 | $97,604 | - |
| M.H. Eby, Inc. IA | Manufacturing | 0 | - | F |
| M.H. Eby, Inc. OH | Manufacturing | 0 | - | F |
| M.H. Eby, Inc. PA | Manufacturing | 0 | - | F |
| M.I. Industries, Inc. MO | Manufacturing | 1 | $125,986 | - |
| M.J. Soffe LLC NC | - | 0 | - | - |
| M.L. McDonald Sales Company, LLC MA | Construction | 0 | - | D |
| M.L. Ruberton Construction Co., Inc. NJ | Construction | 0 | - | F |
| M.R. Williams, Inc. NC | Wholesale Trade | 0 | - | F |
| M.S. Aerospace, Inc. CA | Manufacturing | 1 | $95,618 | - |
| M.S. Ambrogio North America, LLC ME | Manufacturing | 0 | - | F |
| M.S.N. Inc. (McDugald Steele, Stirling Electric & Waterline Designs) TX | Administrative & Waste Services | 0 | - | F |
| M/A-Com Technology Solutions CA | - | 0 | - | - |
| M/A/R/C Inc. TX | Professional & Technical Services | 1 | $120,000 | - |
| M1 Holdings, Inc. IL | - | 1 | $119,000 | - |
| M1 Support Services AL | Transportation & Warehousing | 0 | - | B |
| M1 Support Services MS | Transportation & Warehousing | 0 | - | B |
| M1 Support Services NM | Transportation & Warehousing | 0 | - | F |
| M1 Support Services NV | Transportation & Warehousing | 0 | - | B |
| M1 Support Services TX | Transportation & Warehousing | 0 | - | C |
| M10tek, LLC CO | - | 1 | $326,560 | - |
| M2 Federal, Inc. TX | Construction | 2 | $104,749 | - |
| M2 Services-Ft Hood TX | - | 0 | - | - |
| M2Catalyst, LLC CA | Information & Media | 1 | $170,000 | - |
| M2e LLC FL | - | 1 | $125,000 | - |
| M2H2 Holdings LLC dba Claborn Manufacturing AL | Manufacturing | 0 | - | F |
| M2m Computing Solutions INC. NJ | - | 1 | $139,506 | - |
| M2S Consulting LLC NJ | Professional & Technical Services | 1 | $70,000 | - |
| M2X Energy Inc. FL | Mining & Extraction | 1 | $180,000 | - |
