| MPMetal Parts Fabrication | Vidor | TX | — | ◇ UNVERIFIED |
| MPMetal Pros, LLC | Wichita | KS | — | ◇ UNVERIFIED |
| MSMetal Sales Manufacturing CORP. | Longmont | CO | — | ◇ UNVERIFIED |
| MSMetal Specialist, INC. | Austell | GA | — | ◇ UNVERIFIED |
| MUMetals USA | Fort Washington | PA | — | ◇ UNVERIFIED |
| MTMetal Tech, INC. | Fargo | ND | — | ◇ UNVERIFIED |
| MMetaltek | Lakeland | FL | — | ◇ UNVERIFIED |
| MIMetal-tek, INC. | Lakeland | FL | — | ◇ UNVERIFIED |
| MWMetal Works Corporation | Baton Rouge | LA | — | ◇ UNVERIFIED |
| MWMetal Works INC | Lexington | SC | — | ◇ UNVERIFIED |
| MWMetal Works INC. | Spencer | IA | — | ◇ UNVERIFIED |
| MWMetal Works Performance, Inc | Saint Charles | IL | — | ◇ UNVERIFIED |
| MBMetro Boiler Tube Company, INC. | Gonzales | LA | — | ◇ UNVERIFIED |
| MMMetro Manufacturing INC | Saint Paul | MN | — | ◇ UNVERIFIED |
| MCMetroplex Conveyor & Services, LLC | Quinlan | TX | — | ◇ UNVERIFIED |
| MFMetroplex Fabrication and Erection, LLP | Azle | TX | — | ◇ UNVERIFIED |
| MSMetro Steel | Spring Valley | CA | — | ◇ UNVERIFIED |
| MSMetro Steel Fab INC | San Jose | CA | — | ◇ UNVERIFIED |
| MUMetso USA INC | Portland | OR | — | ◇ UNVERIFIED |
| MBMetwood Building Solutions | Boones Mill | VA | — | ◇ UNVERIFIED |
| MMMexia Main, East, and West Plants | Mexia | TX | — | ◇ UNVERIFIED |
| MCMexico City Iron Works | San Francisco | CA | — | ◇ UNVERIFIED |
| MCMeyers Construction INC | Madera | CA | — | ◇ UNVERIFIED |
 Meyer Utility Structures, LLC Plant No. 1663 | Hager City | WI | — | ◇ UNVERIFIED |
 Mgt Manufacturing LLC | Springville | AL | — | ◇ UNVERIFIED |
| Mgt Manufacturing LLC | Springville | AL | — | ◇ UNVERIFIED |
| MMMHS Management LLC | Pleasant Grove | UT | — | ◇ UNVERIFIED |
| MEMichael E Taylor | Oregon City | OR | — | ◇ UNVERIFIED |
| MZMichal Zieba | Brooklyn | NY | — | ◇ UNVERIFIED |
| MIMichelman-cancelliere Iron Works, INC. | Bath | PA | — | ◇ UNVERIFIED |
| MSMichelman Steel | Allentown | PA | — | ◇ UNVERIFIED |
| MMMichigan Magna INC | Romulus | MI | — | ◇ UNVERIFIED |
| MPMicrotek Pattern Inc | Decatur | IL | — | ◇ UNVERIFIED |
| MSMid-america Steel Products, INC. | Corning | AR | — | ◇ UNVERIFIED |
| MSMid-atlantic Steel, LLC | New Castle | DE | — | ◇ UNVERIFIED |
| MDMi Dept/natural Resources and Environment | River Rouge | MI | — | ◇ UNVERIFIED |
| MFMidland Fabricators & Process Systems LLC | Metairie | LA | — | ◇ UNVERIFIED |
| MMMidland Mechanical, INC. | Billings | MT | — | ◇ UNVERIFIED |
| MSMid South Industrial INC. | Gregory | TX | — | ◇ UNVERIFIED |
| MMMid-south Maintenance, INC. | Memphis | TN | — | ◇ UNVERIFIED |
| MMMid-state Machineand Fabricating CORP. | Lakeland | FL | — | ◇ UNVERIFIED |
| MMMid-state Machine & Fabricating Corporation | Lakeland | FL | — | ◇ UNVERIFIED |
| MMMidstate Manufacturing & Marketing, INC. | Oklahoma City | OK | — | ◇ UNVERIFIED |
| MMMid-states Mechanical Services INC | Mankato | MN | — | ◇ UNVERIFIED |
| MVMid Valley Metal Works, Inc. | Salem | OR | — | ◇ UNVERIFIED |
| MVMid Valley Sheet Metal INC. | La Feria | TX | — | ◇ UNVERIFIED |
| MAMidwest Automation, INC. | Heavener | OK | — | ◇ UNVERIFIED |
| MCMidwest Cryogenics | Lonsdale | MN | — | ◇ UNVERIFIED |
| MMMidwest Manufacturing Corporation | Omaha | NE | — | ◇ UNVERIFIED |
| MRMidwest Racking Manufacturing, INC. | Madison | IL | — | ◇ UNVERIFIED |
| MSMidwest Steel and Rebar LLC | Seymour | MO | — | ◇ UNVERIFIED |
| MSMidwest Steel Fabricators CO INC | Wichita | KS | — | ◇ UNVERIFIED |
| MSMiguel's Sheet Metal | Los Angeles | CA | — | ◇ UNVERIFIED |
| MOMike Owen Fabrication | Bakersfield | CA | — | ◇ UNVERIFIED |
| MOMike Owens Fabrication, INC. | Lancaster | CA | — | ◇ UNVERIFIED |
| MMMikes Metal Works INC | Jamul | CA | — | ◇ UNVERIFIED |
| MJMikey Johns Outdoor, L.L.C. | Lake City | IA | — | ◇ UNVERIFIED |
| MPMillenia Products Group. INC. | Itasca | IL | — | ◇ UNVERIFIED |
| MFMillenium Facility Services INC | Tallapoosa | GA | — | ◇ UNVERIFIED |
 Miller Welding & Machine CO | Brookville | PA | — | ◇ UNVERIFIED |
| MMMill Man Steel INC | Fontana | CA | — | ◇ UNVERIFIED |
| MEMillmark Enterprises, INC. | Elkhart | IN | — | ◇ UNVERIFIED |
| MIMills Iron Wks INC | Gardena | CA | — | ◇ UNVERIFIED |
| MMMill-Tech Manufacturing LLC | New London | WI | — | ◇ UNVERIFIED |
| MVMillvale Vault | Glenshaw | PA | — | ◇ UNVERIFIED |
| MMMil Mar Centruy CORP. | Dayton | OH | — | ◇ UNVERIFIED |
 Minestone Construction | Hillsborough | NJ | — | ◇ UNVERIFIED |
| MEMingle & Elrod INC Dba Performance Steel INC | Murfreesboro | TN | — | ◇ UNVERIFIED |
| MMMinnesota Metalworks INC | Perham | MN | — | ◇ UNVERIFIED |
| MMMinnotte Manufacturing Corporation | Trafford | PA | — | ◇ UNVERIFIED |
| MAMinute-man Anchors, INC. | East Flat Rock | NC | — | ◇ UNVERIFIED |
| MSMinuteman Spring LLC | Millbury | MA | — | ◇ UNVERIFIED |
| MCMirarca Custom Metal Design, LLC | Denham Springs | LA | — | ◇ UNVERIFIED |
| MMMission Mfg LLC | Gold River | CA | — | ◇ UNVERIFIED |
| MVMississippi Valley Struetural Steel,div. | Chattanooga | TN | — | ◇ UNVERIFIED |
| MSMiss Steel LLC | Mechanicville | NY | — | ◇ UNVERIFIED |
| MIMitchco INC | Ponca City | OK | — | ◇ UNVERIFIED |
| MPMitchell Piping, LLC | Hartville | OH | — | ◇ UNVERIFIED |
| MUMitek USA INC | Saint Charles | MO | — | ◇ UNVERIFIED |
| MJM & J Materials, INC. | Trussville | AL | — | ◇ UNVERIFIED |
| MFMKR Fabrication Properties, LLC | Saginaw | MI | — | ◇ UNVERIFIED |
| MTMk Tool & Abrasive INC. | Montebello | CA | — | ◇ UNVERIFIED |
| MWMk Welding & Fabrication, INC. | Waynesville | OH | — | ◇ UNVERIFIED |
| MPMld Properties, LLC | Bakersfield | CA | — | ◇ UNVERIFIED |
| MGMl Gatewood Company | Hillsboro | OR | — | ◇ UNVERIFIED |
| MRMMC Real Estate Investments, LLC | Warren | MI | — | ◇ UNVERIFIED |
| MIMmi Industrial & Steel, LLC | Mesa | AZ | — | ◇ UNVERIFIED |
| MMM - M Machine and Fab INC | Cannon Falls | MN | — | ◇ UNVERIFIED |
| MSMM Systems OPCO, LLC | Pendergrass | GA | — | ◇ UNVERIFIED |
| MVM&M Valve & Regulator, LLC | Clute | TX | — | ◇ UNVERIFIED |
| MIMNM Industries LLC | Denver | CO | — | ◇ UNVERIFIED |
| MIModco Industries, LLC | Conroe | TX | — | ◇ UNVERIFIED |
| MMModern Metal Masters Inc | Phoenix | AZ | — | ◇ UNVERIFIED |
| MWModern Welding CO of Ky | Bowling Green | KY | — | ◇ UNVERIFIED |
| MSModular Steel Structures | Houston | TX | — | ◇ UNVERIFIED |
| MWMollett Welding and Mine Service INC. | Stollings | WV | — | ◇ UNVERIFIED |
| MWMonkey Wrench Fabrication L.l.c. | Bainbridge Island | WA | — | ◇ UNVERIFIED |
| MCMonlan CORP | Kalamazoo | MI | — | ◇ UNVERIFIED |
| MIMonogram Ind, Monogram Aerospace | Los Angeles | CA | — | ◇ UNVERIFIED |
| MCMonsanto Company | Anaheim | CA | — | ◇ UNVERIFIED |
