| MIMateria, INC. | Pasadena | CA | Chemical Manufacturing325199 | 20-99 | ◇ UNVERIFIED |
| MPMaterial Processing INC | Riverview | MI | Fabricated Metal Product Manufacturing332812 | 20-99 | ◇ UNVERIFIED |
| MSMaximum Security Products CORP | Waterford | NY | Primary Metal Manufacturing331221 | 20-99 | ◇ UNVERIFIED |
| MLMcgee Lumber CO INC | Aliceville | AL | Wood Product Manufacturing321113 | 20-99 | ◇ UNVERIFIED |
| MMMcgraw Manufacturing INC | Anaheim | CA | Primary Metal Manufacturing331524 | 20-99 | ◇ UNVERIFIED |
| MFMcneill's Frame Shop | Seagrove | NC | Furniture and Related Product Manufacturing337122 | 20-99 | ◇ UNVERIFIED |
| MSMd Stainless Services INC | Downey | CA | Fabricated Metal Product Manufacturing332999 | 20-99 | ◇ UNVERIFIED |
| MMMedalist Manufacturing INC | Pella | IA | Machinery Manufacturing333999 | 20-99 | ◇ UNVERIFIED |
| MCMedical Coaches | Milford | NY | Transportation Equipment Manufacturing336212 | 20-99 | ◇ UNVERIFIED |
| MIMegamet Industries, INC. | Birmingham | AL | Fabricated Metal Product Manufacturing332812 | 20-99 | ◇ UNVERIFIED |
| MIM.e. Industries, INC. | Algood | TN | Fabricated Metal Product Manufacturing332911 | 20-99 | ◇ UNVERIFIED |
| MBMel Bernie & CO INC | Burbank | CA | Fabricated Metal Product Manufacturing332813 | 20-99 | ◇ UNVERIFIED |
| MBMelges Boat Works INC | Zenda | WI | Transportation Equipment Manufacturing336612 | 20-99 | ◇ UNVERIFIED |
| MEMemphis Engraving CO. INC | Memphis | TN | Printing and Related Support Activities323114 | 20-99 | ◇ UNVERIFIED |
| MPMemphis Plywood | Memphis | TN | Wood Product Manufacturing321211 | 20-99 | ◇ UNVERIFIED |
| MWMemphis Wire & Iron Works Incorporated | Memphis | TN | Fabricated Metal Product Manufacturing332323 | 20-99 | ◇ UNVERIFIED |
| MMMerrill Manufacturing CORP | Merrill | WI | Fabricated Metal Product Manufacturing332618 | 20-99 | ◇ UNVERIFIED |
| MGMertel Gravel CO | Peru | IL | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◇ UNVERIFIED |
| MCMetalloid Corporation | Sturgis | MI | Food Manufacturing311225 | 20-99 | ◇ UNVERIFIED |
| MLMetrix, LLC | Watertown | SD | Fabricated Metal Product Manufacturing332812 | 20-99 | ◇ UNVERIFIED |
| MIMetrocon INC | Central | SC | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◇ UNVERIFIED |
| MWMetropolitan Woodwork | Springfield | NJ | Wood Product Manufacturing321918 | 20-99 | ◇ UNVERIFIED |
| MPMiami Products & Chemical CO. | Dayton | OH | Chemical Manufacturing325998 | 20-99 | ◇ UNVERIFIED |
| MSMica Shop, INC. | Goshen | IN | Furniture and Related Product Manufacturing337110 | 20-99 | ◇ UNVERIFIED |
| MCMichigan Custom Machines INC | Novi | MI | Machinery Manufacturing333999 | 20-99 | ◇ UNVERIFIED |
| MPMichigan Precision Swiss Parts CO INC | Saint Clair | MI | Fabricated Metal Product Manufacturing332721 | 20-99 | ◇ UNVERIFIED |
| MTMid-america Trailer | Lebanon | MO | Transportation Equipment Manufacturing336214 | 20-99 | ◇ UNVERIFIED |
| MCMid-illinois Concrete INC | Effingham | IL | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◇ UNVERIFIED |
| MFMid-south Fabrications INC | Jemison | AL | Fabricated Metal Product Manufacturing332999 | 20-99 | ◇ UNVERIFIED |
| MSMid States Steel Products CO | Lexington | KY | Fabricated Metal Product Manufacturing332312 | 20-99 | ◇ UNVERIFIED |
| MMMidway Mfg INC | Kinsley | KS | Machinery Manufacturing333995 | 20-99 | ◇ UNVERIFIED |
| MIMidwest Industrial Metals | Northlake | IL | Fabricated Metal Product Manufacturing332322 | 20-99 | ◇ UNVERIFIED |
| MMMidwest Machine Products INC | Golden | CO | Fabricated Metal Product Manufacturing332312 | 20-99 | ◇ UNVERIFIED |
| MSMidwest Sign CO | Kansas City | KS | Miscellaneous Manufacturing339950 | 20-99 | ◇ UNVERIFIED |
| MEMielke Electric Works INC | Duluth | MN | Electrical Equipment, Appliance & Component Manufacturing335312 | 20-99 | ◇ UNVERIFIED |
| MLMillville Lumber | Snow Hill | MD | Wood Product Manufacturing321113 | 20-99 | ◇ UNVERIFIED |
| MDMinerva Dairy INC | Minerva | OH | Food Manufacturing311513 | 20-99 | ◇ UNVERIFIED |
| MIMinnick Illinois LLC | Joliet | IL | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◇ UNVERIFIED |
| MDMissouri Dry Dock & Repair CO | Cape Girardeau | MO | Fabricated Metal Product Manufacturing332312 | 20-99 | ◇ UNVERIFIED |
| MMMissouri Machine & Plow | Cedartown | GA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◇ UNVERIFIED |
| MMMissouri Meerschaum Company | Washington | MO | Miscellaneous Manufacturing339999 | 20-99 | ◇ UNVERIFIED |
| MEMister - E - Liquid LLC | Grand Rapids | MI | Beverage and Tobacco Product Manufacturing312230 | 20-99 | ◇ UNVERIFIED |
| MCMjk Custom Fab and Coatings LLC | Ogden | UT | Fabricated Metal Product Manufacturing332312 | 20-99 | ◇ UNVERIFIED |
| MCMobile Concrete | Mills | WY | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◇ UNVERIFIED |
| MFMobile Facility Engineering | Cassopolis | MI | Wood Product Manufacturing321991 | 20-99 | ◇ UNVERIFIED |
| MWModern Woodcrafts, INC | Plainville | CT | Furniture and Related Product Manufacturing337110 | 20-99 | ◇ UNVERIFIED |
| MTMohler Technology | Boonville | IN | Electrical Equipment, Appliance & Component Manufacturing335312 | 20-99 | ◇ UNVERIFIED |
| MBMonarch Brands, INC. | Philadelphia | PA | Textile Product Mills314129 | 20-99 | ◇ UNVERIFIED |
| MCMoritz Concrete, INC. | Mansfield | OH | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◇ UNVERIFIED |
| MCMountain Cabinetry | Heber City | UT | Furniture and Related Product Manufacturing337110 | 20-99 | ◇ UNVERIFIED |
