 Metal Master LLC | Tacoma | WA | — | ◇ UNVERIFIED |
| MMMetal Masters, INC. | Mitchellville | IA | — | ◇ UNVERIFIED |
| MPMetal Parts Fabrication | Vidor | TX | — | ◇ UNVERIFIED |
| MPMetal Pros, LLC | Wichita | KS | — | ◇ 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 |
| MAMetalWork Austin | Austin | TX | — | ◇ UNVERIFIED |
| MWMetal Works Corporation | Baton Rouge | LA | — | ◇ UNVERIFIED |
| MWMetal Works INC | Lexington | SC | — | ◇ UNVERIFIED |
| MWMetal Works INC. | Spencer | IA | — | ◇ UNVERIFIED |
| MLMetalworks, LLC | Gainesville | GA | — | ◇ UNVERIFIED |
| MWMetal Works Performance, Inc | Saint Charles | IL | — | ◇ UNVERIFIED |
| MIMet Industries INC | Gardena | CA | — | ◇ UNVERIFIED |
| MCMetro Custom Iron Works LLC | Milwaukie | OR | — | ◇ 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 |
| 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 |
| MSMeyer Smith INC | Nashville | TN | — | ◇ UNVERIFIED |
 Meyer Utility Structures, LLC Plant No. 1663 | Hager City | WI | — | ◇ UNVERIFIED |
| MMM.g. Mcgrath, INC. | Tucson | AZ | — | ◇ UNVERIFIED |
| MGM G Metal Creations INC | Riverside | CA | — | ◇ UNVERIFIED |
 Mgt Manufacturing LLC | Springville | AL | — | ◇ UNVERIFIED |
| Mgt Manufacturing LLC | Springville | AL | — | ◇ UNVERIFIED |
| MMMHS Management LLC | Pleasant Grove | UT | — | ◇ UNVERIFIED |
| MAMichael a Thomas and Renae Thomas, Individually and As Husband and Wife | Apache Junction | AZ | — | ◇ UNVERIFIED |
| MEMichael E Taylor | Oregon City | OR | — | ◇ UNVERIFIED |
| MMMichael Mccann | Grants Pass | OR | — | ◇ UNVERIFIED |
| MTMichael Todd Mcmurray | Portland | OR | — | ◇ UNVERIFIED |
| MZMichal Zieba | Brooklyn | NY | — | ◇ UNVERIFIED |
| MIMichelman-cancelliere Iron Works, INC. | Bath | PA | — | ◇ UNVERIFIED |
| MSMichelman Steel | Allentown | PA | — | ◇ 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 |
| MPMidland Precision Machining, INC | Chandler | AZ | — | ◇ 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 |
