| MMMennel Milling CO of Virginia | Roanoke | VA | Food Manufacturing311211 | 20-99 | ◐ LIKELY ACTIVE |
| MPMerrick Printing Company | Louisville | KY | Printing and Related Support Activities323110 | 20-99 | ◐ LIKELY ACTIVE |
| MBMeskan Brass Foundry | Chicago | IL | Primary Metal Manufacturing331524 | 20-99 | ◐ LIKELY ACTIVE |
| MFMetal Fabricators INC | Atlanta | GA | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| MRMetallix Refining INC. | Greenville | NC | Primary Metal Manufacturing331314 | 20-99 | ◐ LIKELY ACTIVE |
| MIMichelman INC | Cincinnati | OH | Chemical Manufacturing325180 | 20-99 | ◐ LIKELY ACTIVE |
| MWMichigan Wheel CORP | Grand Rapids | MI | Primary Metal Manufacturing331525 | 20-99 | ◐ LIKELY ACTIVE |
| MCMicro Chem Company, LLC | Adel | GA | Chemical Manufacturing325320 | 20-99 | ◐ LIKELY ACTIVE |
| MAMid America Agri Products Wheatland LLC | Madrid | NE | Chemical Manufacturing325193 | 20-99 | ◐ LIKELY ACTIVE |
| MMMidland Manufacturing CO. | Fort Worth | TX | Primary Metal Manufacturing331525 | 20-99 | ◐ LIKELY ACTIVE |
| MSMidland Steel | Wathena | KS | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| MEMidwest Elastomers INC | Wapakoneta | OH | Chemical Manufacturing325212 | 20-99 | ◐ LIKELY ACTIVE |
Midwest Metal Products INC | Winona | MN | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| MFMiles Fiberglass & Composites, INC. | Clackamas | OR | Chemical Manufacturing325991 | 20-99 | ◐ LIKELY ACTIVE |
| MMMill Masters, INC. | Jackson | TN | Fabricated Metal Product Manufacturing332997 | 20-99 | ◐ LIKELY ACTIVE |
| MPMilwaukee Plating CO | Milwaukee | WI | Fabricated Metal Product Manufacturing332810 | 20-99 | ◐ LIKELY ACTIVE |
| MSMiwon Specialty Chemical USA INC | Columbia | SC | Chemical Manufacturing325199 | 20-99 | ◐ LIKELY ACTIVE |
| MPMl Products LLC | Noble | OK | Chemical Manufacturing325212 | 20-99 | ◐ LIKELY ACTIVE |
| MRMobile Rosin Oil CO INC | Mobile | AL | Chemical Manufacturing325194 | 20-99 | ◐ LIKELY ACTIVE |
| MWModern Welding Company of Florida | Orlando | FL | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| MWModern Welding CO of Iowa INC | Burlington | IA | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| MIModuform, INC. | Fitchburg | MA | Furniture and Related Product Manufacturing337125 | 20-99 | ◐ LIKELY ACTIVE |
| MLMohawk Laboratories Greenville | Greenville | TX | Chemical Manufacturing325998 | 20-99 | ◐ LIKELY ACTIVE |
| MPMolding Products LLC | South Bend | IN | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| MMMonett Metals INC | Monett | MO | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| MMMonogram Metals, INC. | Byesville | OH | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| MOMonotech of Mississippi, Fulton | Fulton | MS | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| MMMoore & Morford INC | Greensburg | PA | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| MCMorgan Concrete CO. | Buford | GA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| MOMorgan Ohare INC | Addison | IL | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| MIMost INC | Troy | MO | Primary Metal Manufacturing331314 | 20-99 | ◐ LIKELY ACTIVE |
| MEMoveero- Estherville | Estherville | IA | Machinery Manufacturing333111 | 20-99 | ◐ LIKELY ACTIVE |
| MCMueller CO Gas Prods Div | Brownsville | TX | Fabricated Metal Product Manufacturing332911 | 20-99 | ◐ LIKELY ACTIVE |
| MFMueller Fittings CO INC | Covington | TN | Primary Metal Manufacturing331420 | 20-99 | ◐ LIKELY ACTIVE |
| MCMulti-cast CORP | Wauseon | OH | Primary Metal Manufacturing331521 | 20-99 | ◐ LIKELY ACTIVE |
| MIMundet INC (roslyn Converters Inc) | Colonial Heights | VA | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |
| MLMurphy-brown, LLC - Bladenboro Feed Mill | Bladenboro | NC | Food Manufacturing311119 | 20-99 | ◐ LIKELY ACTIVE |
| MCMuskegon Composites (dba Gmi Composites, Inc.) | Muskegon | MI | Plastics and Rubber Products Manufacturing326130 | 20-99 | ◐ LIKELY ACTIVE |
| NINagalv-ohio, INC | Canton | OH | Fabricated Metal Product Manufacturing332812 | 20-99 | ◐ LIKELY ACTIVE |
| NMNational Manufacturing Group - Franksville | Franksville | WI | Chemical Manufacturing325991 | 20-99 | ◐ LIKELY ACTIVE |
| NONational Oilwell Varco LP | Houma | LA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| NPNational Paint Industries INC | North Brunswick Twp | NJ | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| NNNeenah Northeast - Brownville | Brownville | NY | Paper Manufacturing322120 | 20-99 | ◐ LIKELY ACTIVE |
| NCNekoosa Coated Products LLC | Nekoosa | WI | Paper Manufacturing322220 | 20-99 | ◐ LIKELY ACTIVE |
| NENew England Union Co., INC. | West Warwick | RI | Primary Metal Manufacturing331528 | 20-99 | ◐ LIKELY ACTIVE |
| NJNew Jersey Galvanizing & Tinning Works | Newark | NJ | Fabricated Metal Product Manufacturing332812 | 20-99 | ◐ LIKELY ACTIVE |
| NNNew Nautical Coatings INC | Clearwater | FL | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| NCNexus Circular LLC | Atlanta | GA | Petroleum and Coal Products Manufacturing324199 | 20-99 | ◐ LIKELY ACTIVE |
| NPNeyenesch Printers | San Diego | CA | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |
| NINibrock, INC. | Chunchula | AL | Fabricated Metal Product Manufacturing332212 | 20-99 | ◐ LIKELY ACTIVE |