| LMLogic Metals Technology | Garland | TX | — | ◇ UNVERIFIED |
| LTLonestar Tooling Solutions | San Antonio | TX | — | ◇ UNVERIFIED |
| LALoral Aeronutronic | Newport Beach | CA | — | ◇ UNVERIFIED |
| LCLoren Cook Co-barnes St Plant | Springfield | MO | — | ◇ UNVERIFIED |
| LPLoren Products | Lawrence | MA | — | ◇ UNVERIFIED |
| LMLoughberry Manufacturing Corporation | Saratoga Springs | NY | — | ◇ UNVERIFIED |
| LBLouisiana Burner | Pineville | LA | — | ◇ UNVERIFIED |
| LALouvers and Equipment Manufacturing, Inc., Dba Lemi | Owasso | OK | — | ◇ UNVERIFIED |
| LLLovely Landing Properties LLC | Price | UT | — | ◇ UNVERIFIED |
| LOLozier Oil Company, INC. | East Peoria | IL | — | ◇ UNVERIFIED |
| LML.p. Machine & Tool Service Company LLC | Indian Mills | NJ | — | ◇ UNVERIFIED |
| LILTD Industries | Lewistown | IL | — | ◇ UNVERIFIED |
| LELt Enterprises of Ohio | North Canton | OH | — | ◇ UNVERIFIED |
| LELucky Enterprises Cargo INC | Stockton | CA | — | ◇ UNVERIFIED |
| LGLucky Gate CO | Platteville | CO | — | ◇ UNVERIFIED |
| LMLueck Metal Recycling, LLC | Watertown | WI | — | ◇ UNVERIFIED |
| LILufkin Industries, INC Foundry Division | Lufkin | TX | — | ◇ UNVERIFIED |
| LSLundeen Steel Fabrication INC | Sandy | OR | — | ◇ UNVERIFIED |
| LILur INC Dba Lumar Metals | Pomona | CA | — | ◇ UNVERIFIED |
| LSLuxury Sink Products CORP | Anaheim | CA | — | ◇ UNVERIFIED |
| LTLyons Tool and Machine INC. | Lyons | GA | — | ◇ UNVERIFIED |
| MMM2 Modern Metal, LLC | Salt Lake City | UT | — | ◇ UNVERIFIED |
| MRMaas Radiator Shop INC | Bloomington | IL | — | ◇ UNVERIFIED |
| MAMacadam Aluminum & Bronze CO | Portland | OR | — | ◇ UNVERIFIED |
| MCMachine Craft San Diego | San Diego | CA | — | ◇ UNVERIFIED |
| MMMachinery Manufacturer LLC | San Bernardino | CA | — | ◇ UNVERIFIED |
| MTMachine Tool Masters, INC. | Pensacola | FL | — | ◇ UNVERIFIED |
| MCMachining Concepts, Inc. | Cambridge | MN | — | ◇ UNVERIFIED |
| MGMachinists Group Corporation | Gilroy | CA | — | ◇ UNVERIFIED |
| MIMachinists INC | Seattle | WA | — | ◇ UNVERIFIED |
 Mac Industries | Fontana | CA | — | ◇ UNVERIFIED |
| MRMAC RAK, Inc. | Moberly | MO | — | ◇ UNVERIFIED |
| MMMadar Metal Fabricating LLC | Lansing | MI | — | ◇ UNVERIFIED |
| MHMad House Customs LLC | Denver | NC | — | ◇ UNVERIFIED |
| MMMadison Manufacturing Inc. | Bremen | IN | — | ◇ UNVERIFIED |
| MIMadruga Iron Works, INC. | Tracy | CA | — | ◇ UNVERIFIED |
| MIMaf Industries | Traver | CA | — | ◇ UNVERIFIED |
| MDMagalee Designs, LLC | Eugene | OR | — | ◇ UNVERIFIED |
| MRMagical Rubbish | Moses Lake | WA | — | ◇ UNVERIFIED |
| MMagnaloy | Alpena | MI | — | ◇ UNVERIFIED |
| MSMagnetic Sales & Manufacturing CO. INC | Tucson | AZ | — | ◇ UNVERIFIED |
| MSMagnetic Specialties INC | Clackamas | OR | — | ◇ UNVERIFIED |
| MMMagnum Magnetics | Caldwell | OH | — | ◇ UNVERIFIED |
| MSMagnum Steel Works, Inc | Mount Vernon | IL | — | ◇ UNVERIFIED |
| MLMainline LLC | Shelby Gap | KY | — | ◇ UNVERIFIED |
| MSMain St. Machine & Repair LLC | Saint Paul | OR | — | ◇ UNVERIFIED |
| MCMajX CNC | Tempe | AZ | — | ◇ UNVERIFIED |
| MIMallin Industries, LLC | Fairfield | AL | — | ◇ UNVERIFIED |
| MFMalm Fireplaces INC | Santa Rosa | CA | — | ◇ UNVERIFIED |
| MMalo | Tulsa | OK | — | ◇ UNVERIFIED |
| MSMangels Sheet Metal, INC | Alexandria | LA | — | ◇ UNVERIFIED |
| MSManheim Specialty Machine, Incorporated | Manheim | PA | — | ◇ UNVERIFIED |
| MMManitou Manufacturing Company | White Bear Lake | MN | — | ◇ UNVERIFIED |
| MAMansell and Associates, LLC | Tuscumbia | AL | — | ◇ UNVERIFIED |
| MEMape Engineering INC. | Colton | CA | — | ◇ UNVERIFIED |
| MPMapleton Properties LLC | Spanish Fork | UT | — | ◇ UNVERIFIED |
| MEMarathon Equipment Company | Yerington | NV | — | ◇ UNVERIFIED |
| MPMarch Performance INC | Naples | FL | — | ◇ UNVERIFIED |
| MMMarietta Magnetics LLC | Marietta | OH | — | ◇ UNVERIFIED |
| MSMarking Specialists/Polymer Technologies | Buffalo Grove | IL | — | ◇ UNVERIFIED |
 Markins Enterprise, LLC | Apache Junction | AZ | — | ◇ UNVERIFIED |
| MPMark Peiser Manufacturing, Inc. | Tavares | FL | — | ◇ UNVERIFIED |
| MVMark Vii Equipment Incorporated | Arvada | CO | — | ◇ UNVERIFIED |
| MIMaro International Corporation | Tulsa | OK | — | ◇ UNVERIFIED |
| MLMarrick, LLC | Chesapeake | VA | — | ◇ UNVERIFIED |
| MPMar-tech Precision, LLC | Hackettstown | NJ | — | ◇ UNVERIFIED |
| MDMartell Design and Fabrication LLC | Saco | ME | — | ◇ UNVERIFIED |
| MMMartin Metal Fabricators INC | Salem | OR | — | ◇ UNVERIFIED |
| MMMartin Metalwork LLC | Berea | KY | — | ◇ UNVERIFIED |
| MHMarvel Holdings LLC | Orchard | TX | — | ◇ UNVERIFIED |
| MMMaryland Metals Processing, INC. | Sparrows Point | MD | — | ◇ UNVERIFIED |
| MLMascoat LLC | West Monroe | LA | — | ◇ UNVERIFIED |
| MMMason Machine and Fab, LLC | Lafayette | LA | — | ◇ UNVERIFIED |
| MIMasport Incorporated | Lincoln | NE | — | ◇ UNVERIFIED |
| MLMasses LLC | Las Vegas | NV | — | ◇ UNVERIFIED |
| MMMaster Magnetics, INC. | Castle Rock | CO | — | ◇ UNVERIFIED |
| MSMaster Sheet Metal | New York | NY | — | ◇ UNVERIFIED |
| MCMaterial Control | Croswell | MI | — | ◇ UNVERIFIED |
| MCMaterial Control INC. | Atlanta | GA | — | ◇ UNVERIFIED |
| MCMaterial Control, INC. | Arlington | TX | — | ◇ UNVERIFIED |
| MTMaterials Technology INC | Somerset | NJ | — | ◇ UNVERIFIED |
| MBMaterion Brush INC | Fremont | CA | — | ◇ UNVERIFIED |
| MHMat Holdings INC. Dba Midwest Air Technologies | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
 Matrix Machine and Repair INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| MMMatrix Manufacturing, INC. | Springfield | MO | — | ◇ UNVERIFIED |
| MAMatsu Alabama, INC | Huntsville | AL | — | ◇ UNVERIFIED |
 Matthews International Corporation | San Jacinto | CA | — | ◇ UNVERIFIED |
| MMMatthews Manufacturing INC. | Saint Louis | MO | — | ◇ UNVERIFIED |
| MEMatzke Enterprises, INC. | Salem | WI | — | ◇ UNVERIFIED |
| MAMaumee Assembly & Stamping | Maumee | OH | — | ◇ UNVERIFIED |
 Maverick Manufacturing LLC | Lakeville | MN | — | ◇ UNVERIFIED |
| MMMaxco Manufacturing LLC | Ona | WV | — | ◇ UNVERIFIED |
| MMMaxco Manufacturing LLC | Ona | WV | — | ◇ UNVERIFIED |
| MMMaxcor Manufacturing INC | Colorado Springs | CO | — | ◇ UNVERIFIED |
| MLMaximus-3 LLC | Auburn Hills | MI | — | ◇ UNVERIFIED |
 Max Machining, LLC | Perkasie | PA | — | ◇ UNVERIFIED |
| MMMax Manufacturing INC | Bend | OR | — | ◇ UNVERIFIED |
| MPMaysteel Porters | Garland | TX | — | ◇ UNVERIFIED |
| MWMb Weld LLC | Waynesboro | VA | — | ◇ UNVERIFIED |
| MIMccampbell INC | Destrehan | LA | — | ◇ UNVERIFIED |
