Louisiana Pacific Corporation \2013 Green Bay | Green Bay | WI | Wood Product Manufacturing321219 | 100-499 | ◐ LIKELY ACTIVE |
Louisiana-pacific Corporation-hayward | Hayward | WI | Wood Product Manufacturing321210 | 100-499 | ◐ LIKELY ACTIVE |
| LPLouisville Packaging | Louisville | KY | Chemical Manufacturing325120 | 100-499 | ◐ LIKELY ACTIVE |
| LALubrizol Advanced Materials INC | Calvert City | KY | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| LMLucas Milhaupt INC | Warwick | RI | Primary Metal Manufacturing331420 | 100-499 | ◐ LIKELY ACTIVE |
| LOLucas Oil Products INC | Corydon | IN | Petroleum and Coal Products Manufacturing324191 | 100-499 | ◐ LIKELY ACTIVE |
| LILufkin Industries INC | Lufkin | TX | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| LALyondellbasell Advanced Polymers INC | Akron | OH | Chemical Manufacturing325991 | 20-99 | ◐ LIKELY ACTIVE |
| MRMaag Reduction | Kent | OH | Machinery Manufacturing333248 | 20-99 | ◐ LIKELY ACTIVE |
| MFMaass Flange Lumberdale | Houston | TX | Fabricated Metal Product Manufacturing332112 | 1-19 | ◐ LIKELY ACTIVE |
| MSMaax Spas Industries CORP. | Chandler | AZ | Chemical Manufacturing325991 | 100-499 | ◐ LIKELY ACTIVE |
| MMMacon, Missouri - Frozen Foods | Macon | MO | Food Manufacturing311412 | — | ◐ LIKELY ACTIVE |
| MMactac | Minneapolis | MN | Paper Manufacturing322220 | 20-99 | ◐ LIKELY ACTIVE |
| MIMadico, INC | Pinellas Park | FL | Paper Manufacturing322220 | 100-499 | ◐ LIKELY ACTIVE |
| MCMadison-kipp Corporation | Richmond | IN | Primary Metal Manufacturing331523 | 20-99 | ◐ LIKELY ACTIVE |
| MEMagna Electric Vehicle Structures | Saint Clair | MI | Electrical Equipment, Appliance & Component Manufacturing335999 | 100-499 | ◐ LIKELY ACTIVE |
| MIMagni Industries INC | Detroit | MI | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| MMMagnolia Metal CORP | Auburn | NE | Primary Metal Manufacturing331523 | 20-99 | ◐ LIKELY ACTIVE |
| MMMagnolia Metal & Plastic Products, INC | Vicksburg | MS | Plastics and Rubber Products Manufacturing326199 | 1-19 | ◐ LIKELY ACTIVE |
Magnum Machining INC | Deerwood | MN | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| MBMahle Behr Mt Sterling INC | Mount Sterling | OH | Primary Metal Manufacturing331318 | 100-499 | ◐ LIKELY ACTIVE |
| MFMahoney Foundries | Kendallville | IN | Primary Metal Manufacturing331524 | 100-499 | ◐ LIKELY ACTIVE |
| MMallinckrodt | Saint Louis | MO | Chemical Manufacturing325199 | 20-99 | ◐ LIKELY ACTIVE |
| MMManildra Milling CO | Hamburg | IA | Food Manufacturing311221 | 20-99 | ◐ LIKELY ACTIVE |
| MGManitowoc Grey Iron Foundry INC | Manitowoc | WI | Primary Metal Manufacturing331511 | 1-19 | ◐ LIKELY ACTIVE |
| MCMapei Corporation | Dalton | GA | Chemical Manufacturing325520 | 20-99 | ◐ LIKELY ACTIVE |
| MEMarley Engineered Products | Bennettsville | SC | Machinery Manufacturing333414 | 100-499 | ◐ LIKELY ACTIVE |
| MUMarmon Utility LLC | Milford | NH | Primary Metal Manufacturing331318 | 100-499 | ◐ LIKELY ACTIVE |
| MSMartin Sprocket and Gear, INC. | Paragould | AR | Fabricated Metal Product Manufacturing332117 | 100-499 | ◐ LIKELY ACTIVE |
| MKMary Kay | Lewisville | TX | Chemical Manufacturing325611 | 500+ | ◐ LIKELY ACTIVE |
| MBMastercraft Boat Company | Vonore | TN | Transportation Equipment Manufacturing336612 | 100-499 | ◐ LIKELY ACTIVE |
| MSMatalco Shelbyville LLC | Shelbyville | KY | Primary Metal Manufacturing331314 | 100-499 | ◐ LIKELY ACTIVE |
| MBMaterion Brewster LLC | Brewster | NY | Primary Metal Manufacturing331491 | 20-99 | ◐ LIKELY ACTIVE |
| MBMaterion Brush INC | Tucson | AZ | Nonmetallic Mineral Product Manufacturing327113 | — | ◐ LIKELY ACTIVE |
| MBMaterion Brush INC | Lorain | OH | Primary Metal Manufacturing331314 | 20-99 | ◐ LIKELY ACTIVE |
| MTMaverick Tube | Conroe | TX | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| MCMayco Colors | Hilliard | OH | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| MFMay-craft Fiberglass Products, INC. | Four Oaks | NC | Transportation Equipment Manufacturing336612 | — | ◐ LIKELY ACTIVE |
| MMMay Manufacturing LLC Dba Artesian Spas | Las Vegas | NV | Plastics and Rubber Products Manufacturing326191 | 100-499 | ◐ LIKELY ACTIVE |
| MDMb Dynamics, INC. | Bedford | OH | Computer and Electronic Product Manufacturing334519 | 20-99 | ◐ LIKELY ACTIVE |
| MIMcclure Industries | Portland | OR | Chemical Manufacturing325211 | 1-19 | ◐ LIKELY ACTIVE |
| MCMccreary County Hardwoods INC | Pine Knot | KY | Wood Product Manufacturing321113 | 20-99 | ◐ LIKELY ACTIVE |
Mcgean-rohco, INC | Livonia | MI | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| MCMedical Component Specialists INC | Bellingham | MA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| MIMedline Industries, LP | North Mankato | MN | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| MPMedtronic Perfusion Systems | Brooklyn Park | MN | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
| MVMedtronic Vascular INC | Danvers | MA | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
| MMMennel Milling CO of Virginia | Roanoke | VA | Food Manufacturing311211 | 20-99 | ◐ LIKELY ACTIVE |
| MTMentor Texas | Irving | TX | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
| MMMerchants Metals | Houston | TX | Fabricated Metal Product Manufacturing332618 | 100-499 | ◐ LIKELY ACTIVE |