| LCLiberty Compassion INC Dba Affinity | Clinton | MA | — | ◇ UNVERIFIED |
| LPLiberty Plastics Molding Corporation, INC. | Bellevue | KY | — | ◇ UNVERIFIED |
| LPLifetime Plastics | Morgan Hill | CA | — | ◇ UNVERIFIED |
| LILkr INC Dba Raycon Industries | Brea | CA | — | ◇ UNVERIFIED |
| LFLonestar Fiberglass New Braunfels | New Braunfels | TX | — | ◇ UNVERIFIED |
| LFLonestar Fiberglass Pools | Kingsbury | TX | — | ◇ UNVERIFIED |
| LALos Angeles Pump and Valve Products | Huntington Park | CA | — | ◇ UNVERIFIED |
 Louisiana Pacific CORP | Middlebury | IN | — | ◇ UNVERIFIED |
| LMLouis Meskan Brass Foundry, INC. | Chicago | IL | — | ◇ UNVERIFIED |
| LFLufkin Foundry & Power Transmission Divisions | Lufkin | TX | — | ◇ UNVERIFIED |
| LFLynchburg Foundry Llc, D/b/a Archer Creek Foundry | Lynchburg | VA | — | ◇ UNVERIFIED |
| LPLynwood Pattern | Ontario | CA | — | ◇ UNVERIFIED |
| MFMacaulay Foundry INC | Berkeley | CA | — | ◇ UNVERIFIED |
 Machineworks Manufacturing | Chatsworth | CA | — | ◇ UNVERIFIED |
| MMMack Molding CO | Inman | SC | — | ◇ UNVERIFIED |
| MPMacro Plastics INC | Fairfield | CA | — | ◇ UNVERIFIED |
| MMMagneti Marelli Powertrain USA INC. | Sanford | NC | — | ◇ UNVERIFIED |
| MMMagnus Metal INC | East Peoria | IL | — | ◇ UNVERIFIED |
| MMManchester Metals | North Manchester | IN | — | ◇ UNVERIFIED |
| MAManhole Adjusting Contractors | Monterey Park | CA | — | ◇ UNVERIFIED |
| MCMarble Crafters | Holly Hill | FL | — | ◇ UNVERIFIED |
| MMMarcellus Metalcasters INC | Marcellus | MI | — | ◇ UNVERIFIED |
| MMMarine Muffler Corporation | Apopka | FL | — | ◇ UNVERIFIED |
| MCMarkel Corporation | Plymouth Meeting | PA | — | ◇ UNVERIFIED |
| MFMarlborough Foundry | Marlborough | MA | — | ◇ UNVERIFIED |
| MCMarvin Composites | Fargo | ND | — | ◇ UNVERIFIED |
| MIMas Iron CO | Los Angeles | CA | — | ◇ UNVERIFIED |
| MIMasters in Metal, Inc | Oxnard | CA | — | ◇ UNVERIFIED |
| MCMateenbar Composite Reinforcements, LLC | Concord | NC | — | ◇ UNVERIFIED |
| MFMay Foundry & Machine CO | Slc | UT | — | ◇ UNVERIFIED |
| MPMayon Plastics CO | Hopkins | MN | — | ◇ UNVERIFIED |
| MDMc Dist & Mfg. CO | Addison | IL | — | ◇ UNVERIFIED |
| MMcwane | Tyler | TX | — | ◇ UNVERIFIED |
| MCMcwane Cast Iron Pipe CO. | Birmingham | AL | — | ◇ UNVERIFIED |
| MCMcwane Cast Iron Pipe CO. | Birmingham | AL | — | ◇ UNVERIFIED |
| MIMcwane, INC. | Oakland | CA | — | ◇ UNVERIFIED |
| MDM D Building Products INC | Woodburn | OR | — | ◇ UNVERIFIED |
| MBMd Building Products, INC. | Gainesville | GA | — | ◇ UNVERIFIED |
| MNMeadville New Products, INC. | Meadville | PA | — | ◇ UNVERIFIED |
| MEMedical Extrusion Technologies Minnesota INC | Elk River | MN | — | ◇ UNVERIFIED |
| MPMercer Prods CO | Umatilla | FL | — | ◇ UNVERIFIED |
| MPMercury Plastics, INC. | City of Industry | CA | — | ◇ UNVERIFIED |
| MPMeridian Pr0ducts of America | Eaton Rapids | MI | — | ◇ UNVERIFIED |
| MSMetaldyne Sinterforged Products LLC | North Vernon | IN | — | ◇ UNVERIFIED |
| MPMetalico Pgh INC | Pittsburgh | PA | — | ◇ UNVERIFIED |
| MTMetal Technologies Dba Ravenna Ductile Iron Plant | Ravenna | MI | — | ◇ UNVERIFIED |
| MLMetavation LLC Vassar Plt | Vassar | MI | — | ◇ UNVERIFIED |
| MDMichigan Die Casting LLC. | Dowagiac | MI | — | ◇ UNVERIFIED |
| MIMicrolumen INC | Oldsmar | FL | — | ◇ UNVERIFIED |
| MMMicro Metals | Richmond | CA | — | ◇ UNVERIFIED |
