 Lippert Components, INC. | Jackson Center | OH | — | ◇ UNVERIFIED |
| Lippert Components, INC. - Indiana Frame Division | Goshen | IN | — | ◇ UNVERIFIED |
| Lippert Components INC Plant 20 | Longview | TX | — | ◇ UNVERIFIED |
| Lippert Components Plant 151 | Kendallville | IN | — | ◇ UNVERIFIED |
| LCLippert Componets Plant 59 | Elkhart | IN | — | ◇ UNVERIFIED |
| LPLippert Plant 85 | Goshen | IN | — | ◇ UNVERIFIED |
| LILitecrete, INC. | Miami | FL | — | ◇ UNVERIFIED |
| LSLittell Steel Co/bridgewater | New Brighton | PA | — | ◇ UNVERIFIED |
| LSLittell Steel Co/bridgewater | New Brighton | PA | — | ◇ UNVERIFIED |
| LWLittle Washington Fabrications, INC. | Christiana | PA | — | ◇ UNVERIFIED |
| LFLivingston Family Trust Dated August 24,2020 | El Cajon | CA | — | ◇ UNVERIFIED |
| LTLivonia Tool and Laser | Litchfield | MI | — | ◇ UNVERIFIED |
| LILiw INC | Ramsey | MN | — | ◇ UNVERIFIED |
| LALj Allstar Enterprises, INC. | Moore | OK | — | ◇ UNVERIFIED |
| LILjl Ironworks LLC | Burlington | WA | — | ◇ UNVERIFIED |
| LOL&L Ornamental | Albany | OR | — | ◇ UNVERIFIED |
| LELLS Enterprises, Corp. | Freetown | MA | — | ◇ UNVERIFIED |
| LELmc Enterprises INC Dba Lowry Manufacturing CO | Lowry | MN | — | ◇ UNVERIFIED |
| LILm Industrial, INC. | Orlando | FL | — | ◇ UNVERIFIED |
| LML & M Welding, Inc. | Chicago | IL | — | ◇ UNVERIFIED |
| LML & M Welding INC | Tangent | OR | — | ◇ UNVERIFIED |
| LIL&n Industries INC | Rushville | IL | — | ◇ UNVERIFIED |
| LFLodi Fab Industries INC | Lodi | CA | — | ◇ UNVERIFIED |
| LTLonestar Tooling Solutions | San Antonio | TX | — | ◇ UNVERIFIED |
| LBLong Beach/msm Enterprises | Long Beach | CA | — | ◇ UNVERIFIED |
| LPLookout Plating, INC. | Chattanooga | TN | — | ◇ UNVERIFIED |
| LLorrich | Cavalier | ND | — | ◇ UNVERIFIED |
| LSLortz & Son Mfg CO | Bakersfield | CA | — | ◇ UNVERIFIED |
| LNLouis Nop | Middlebury | VT | — | ◇ UNVERIFIED |
| LILPG Industries Inc | Clifton Heights | PA | — | ◇ UNVERIFIED |
| LWLpi Worldwide INC | Chicago | IL | — | ◇ UNVERIFIED |
| LRL & R Industries, INC. | Cabool | MO | — | ◇ UNVERIFIED |
| LSL & S Manufacturing, INC. | Orange City | FL | — | ◇ UNVERIFIED |
| LILTTR Inc | Salt Lake City | UT | — | ◇ UNVERIFIED |
| LILufkin Industries LLC | Levelland | TX | — | ◇ UNVERIFIED |
| LMLukjan Metal Products Carolina, INC. | Kings Mountain | NC | — | ◇ UNVERIFIED |
| LILuzerne Iron Works, INC. | Luzerne | PA | — | ◇ UNVERIFIED |
| LSLV Steel & Fabrication LLC | Allentown | PA | — | ◇ UNVERIFIED |
| LSLynchburg Steel & Specialty Company | Abingdon | VA | — | ◇ UNVERIFIED |
| LSLyndon Steel Company LLC | High Point | NC | — | ◇ UNVERIFIED |
| LILynx Iron Corporation | Bakersfield | CA | — | ◇ UNVERIFIED |
| MAMachine Applications Technology INC | San Jose | CA | — | ◇ UNVERIFIED |
| MIMadison INC / 8500 New Sapulpa Rd | Tulsa | OK | — | ◇ UNVERIFIED |
| MIMadison Industries | Los Angeles | CA | — | ◇ UNVERIFIED |
| MIMadison Industries, INC of Oklahoma | Tulsa | OK | — | ◇ UNVERIFIED |
| MMMadison-smith Machine & Tool CO LLC | Glasgow | KY | — | ◇ UNVERIFIED |
| MRMad River Fabricating LTD | Springfield | OH | — | ◇ UNVERIFIED |
| MNMageba North America | Riverside | CA | — | ◇ UNVERIFIED |
| MUMageba Usa, LLC | Pottstown | PA | — | ◇ UNVERIFIED |
| MPMagga Products Company INC | Holly Hill | FL | — | ◇ UNVERIFIED |
| MCMaggie Chacon | El Paso | TX | — | ◇ UNVERIFIED |
| MSMagni-fab Southwest Company, INC. | Howe | TX | — | ◇ UNVERIFIED |
| MMMagnuson Metals Utah, LLC | Salt Lake City | UT | — | ◇ UNVERIFIED |
| MSMain Street Fabrications and Manufacturing, LLC | Brooksville | FL | — | ◇ UNVERIFIED |
| MMMaintenance & Machinery Erectors, INC. | Mulberry | FL | — | ◇ UNVERIFIED |
| MWMajestic Water Spouts, LLC | Mesa | AZ | — | ◇ UNVERIFIED |
| MSManitex Sabre INC | Knox | IN | — | ◇ UNVERIFIED |
| MFMann's Fabrication & Welding Inc. | Columbus | OH | — | ◇ UNVERIFIED |
| MGManpower Group | Amarillo | TX | — | ◇ UNVERIFIED |
| MMMansfield Metal Solutions LLC | Ontario | CA | — | ◇ UNVERIFIED |
| MIManufab, INC. | Bay Saint Louis | MS | — | ◇ UNVERIFIED |
| MWManz Work, INC. | Orlando | FL | — | ◇ UNVERIFIED |
| MAMarine Accessories Corporation (mac) | Maryville | TN | — | ◇ UNVERIFIED |
| MFMarine Fab & Repair, INC | Houma | LA | — | ◇ UNVERIFIED |
| MIMaritime International INC | Broussard | LA | — | ◇ UNVERIFIED |
| MBMark Body Truck & Equipment CO | Imlay City | MI | — | ◇ UNVERIFIED |
| MGMark Godfrey Sr Individual Dba United Iron Works | Orland | CA | — | ◇ UNVERIFIED |
| MMMarkle Manufacturing Company of San Antonio | San Antonio | TX | — | ◇ UNVERIFIED |
| MMMarks Metal Technology INC | Clackamas | OR | — | ◇ UNVERIFIED |
| MSMark Steel CORP | Salt Lake City | UT | — | ◇ UNVERIFIED |
| MLMarrick LLC | Norfolk | VA | — | ◇ UNVERIFIED |
| MSMarshall Steel Services INC. | Arvada | CO | — | ◇ UNVERIFIED |
| MMMartelli's Metal Fabrication INC | Ivyland | PA | — | ◇ UNVERIFIED |
| MSMartha S Materials INC | Lexington | KY | — | ◇ UNVERIFIED |
| MSMartinez Steel | San Francisco | CA | — | ◇ UNVERIFIED |
| MIMartin Iron Works, INC | Reno | NV | — | ◇ UNVERIFIED |
| MIMartin Iron Works, INC. | Reno | NV | — | ◇ UNVERIFIED |
| MMMartin Manufactuirng, INC. | Sapulpa | OK | — | ◇ UNVERIFIED |
| MHMartin-Pittman Holdings, Inc. | Indianapolis | IN | — | ◇ UNVERIFIED |
| MSMartin Steel Constructors | Eleele | HI | — | ◇ UNVERIFIED |
| MSMartin Steel INC | Huntington | WV | — | ◇ UNVERIFIED |
| MSMaryland Structural Fabricators INC | Millington | MD | — | ◇ UNVERIFIED |
| MLMascoat LLC | West Monroe | LA | — | ◇ UNVERIFIED |
| MFMas Fab, Incorporated Dba Formit Steel Company | Red Lion | PA | — | ◇ UNVERIFIED |
| MSMason Structural Steel INC. | Walton Hills | OH | — | ◇ UNVERIFIED |
| MWMason West, INC | Placentia | CA | — | ◇ UNVERIFIED |
| MWMaspeth Welding, INC | New York | NY | — | ◇ UNVERIFIED |
| MMMass Machine & Fabricating Company | Washington | PA | — | ◇ UNVERIFIED |
| MMMatcor Metal Fabrication | Morton | IL | — | ◇ UNVERIFIED |
| MCMaterial Control Systems, INC. | Cordova | IL | — | ◇ UNVERIFIED |
| MHMaterial Handling Technologies, INC. | North Syracuse | NY | — | ◇ UNVERIFIED |
| MIMattessich Iron, LLC | Baldwinsville | NY | — | ◇ UNVERIFIED |
| MIMattessich Iron, LLC | Memphis | NY | — | ◇ UNVERIFIED |
| MBMaura Buildings, Incorporated | Lebanon | PA | — | ◇ UNVERIFIED |
| MMMaurice Mesple Dba Mesples Machine Shop and Pump | Fresno | CA | — | ◇ UNVERIFIED |
| MSMay Specialty Fabricators, INC. | Register | GA | — | ◇ UNVERIFIED |
 Mayville Engineering Company INC Dba Mec | Vanderbilt | MI | — | ◇ UNVERIFIED |
| MWMazzella Welding & Fabrication INC | Wellsburg | WV | — | ◇ UNVERIFIED |
| MEMbm Enterprises, INC. | Pleasant Plains | AR | — | ◇ UNVERIFIED |
| MAMcabee Assembly Facility | Tuscaloosa | AL | — | ◇ UNVERIFIED |
