| MCMetal Craft Engineering | Fenwick | WV | — | ◇ UNVERIFIED |
| MCMetal Culverts INC | Oakland | MN | — | ◇ UNVERIFIED |
 Metal Culverts INC. | Jefferson City | MO | — | ◇ UNVERIFIED |
| MIMetal-era, INC. | Waukesha | WI | — | ◇ UNVERIFIED |
| MFMetal Force, INC. | Roy | UT | — | ◇ UNVERIFIED |
| MLMetal Line Fabrication, INC | Salt Lake City | UT | — | ◇ UNVERIFIED |
| MCMetal-link CORP. | Fond Du Lac | WI | — | ◇ UNVERIFIED |
| MMMetal Masters of North Florida INC | Jacksonville | FL | — | ◇ UNVERIFIED |
| MMMetal Merchants of Michigan INC | Rochester Hills | MI | — | ◇ UNVERIFIED |
| MIMetalogic Industries LLC | Dudley | MA | — | ◇ UNVERIFIED |
| MPMetal Panels INC. | Kansas City | KS | — | ◇ UNVERIFIED |
| MPMetal Plus LLC | Grand Rapids | MI | — | ◇ UNVERIFIED |
 Metal Products Co, Lc | Marianna | FL | — | ◇ UNVERIFIED |
| MIMetalrite, INC. | Richardson | TX | — | ◇ UNVERIFIED |
| MRMetal Roofing Solutions LLC | Wheat Ridge | CO | — | ◇ UNVERIFIED |
| MSMetal Sales Manufacturing Corporation | New Albany | IN | — | ◇ UNVERIFIED |
| MSMetal Sales Manufacturing Corporation | Otsego | MN | — | ◇ UNVERIFIED |
| MSMetal Sales Manufacturing Corporation | Detroit Lakes | MN | — | ◇ UNVERIFIED |
| MSMetal Sales Mfg CORP | Independence | MO | — | ◇ UNVERIFIED |
| MSMetal Service of Temple, INC. | Temple | PA | — | ◇ UNVERIFIED |
| MIMetalspand INC. | Waurika | OK | — | ◇ UNVERIFIED |
| MSMetal Specialties CO | San Leandro | CA | — | ◇ UNVERIFIED |
| MIMetal-tech, INC. | Las Cruces | NM | — | ◇ UNVERIFIED |
| MIMetaltech Industries INC | Longmont | CO | — | ◇ UNVERIFIED |
| MTMetal Tronics LLC | Georgetown | MA | — | ◇ UNVERIFIED |
| MHMetalworks Hawaii LLC | Honolulu | HI | — | ◇ UNVERIFIED |
| MWMetal Works INC. | Londonderry | NH | — | ◇ UNVERIFIED |
| MFMet Fab International, INC. | Waynesboro | VA | — | ◇ UNVERIFIED |
| MLMetkote Laminated Prod/taylor Plt | Taylor | PA | — | ◇ UNVERIFIED |
| MIMet-l-fab INC | Londonderry | NH | — | ◇ UNVERIFIED |
| MIMetl-fab, INC. | Omaha | NE | — | ◇ UNVERIFIED |
| MMMetro Metal Supply, INC. | Denver | CO | — | ◇ UNVERIFIED |
| MSMetroplex Sheet Metal II LLC | Garland | TX | — | ◇ UNVERIFIED |
| MTMetro Test and Balance, INC. | Capitol Heights | MD | — | ◇ UNVERIFIED |
| MHMexico Heating Co., INC. | Mexico | MO | — | ◇ UNVERIFIED |
| MRMfg. Resources, INC. | Rochester | NY | — | ◇ UNVERIFIED |
| MWMF Workshops, LLC | New Lebanon | NY | — | ◇ UNVERIFIED |
| MDM&g Duravent, INC. | Albany | NY | — | ◇ UNVERIFIED |
| MHM & H Metal Specialties INC | Irving | TX | — | ◇ UNVERIFIED |
| MHM & H Metal Specialties, INC. | Dallas | TX | — | ◇ UNVERIFIED |
| MHMiba Hydramechanica Corporation | Sterling Hts | MI | — | ◇ UNVERIFIED |
| MAMichael A. Melton (EPC) | Shelby | NC | — | ◇ UNVERIFIED |
| MMMicra Manufacturing | Hugo | MN | — | ◇ UNVERIFIED |
| MMMicro Metals | Colorado Springs | CO | — | ◇ UNVERIFIED |
| MAMid America Precision Products | Stella | MO | — | ◇ UNVERIFIED |
| MLMidget Louver | Milford | CT | — | ◇ UNVERIFIED |
| MMMid-ohio Mechanical, INC. | Columbus | OH | — | ◇ UNVERIFIED |
| MSMid State Fabricating INC | Blaine | MN | — | ◇ UNVERIFIED |
 Midwest Fabrication & Supply LLC Dba Superior Air | Zumbrota | MN | — | ◇ UNVERIFIED |
| MIMidwest Industrial Metals | Northlake | IL | — | ◇ UNVERIFIED |
| MKMidwest Knifemaker LLC | Mankato | MN | — | ◇ UNVERIFIED |
| MMMidwest Manufacturing and Distributing, INC. Dba Midwest Metal Forming | Chicago | IL | — | ◇ UNVERIFIED |
| MMMidwest Metal Works, Inc. | New Albany | IN | — | ◇ UNVERIFIED |
| MDMike & Den Property Management, LLC | Louisville | KY | — | ◇ UNVERIFIED |
| MMMi-kee-tro Metal Manufacturing, INC. | York | PA | — | ◇ UNVERIFIED |
| MRMike Ray Manufacturing, INC. | Spring | TX | — | ◇ UNVERIFIED |
| MFMikes Fabricating Incorporated | Moody | AL | — | ◇ UNVERIFIED |
| MWMillers Welding and Fabrication INC | West Point | KY | — | ◇ UNVERIFIED |
| MSMinneapolis Sheeet Metal INC | New Brighton | MN | — | ◇ UNVERIFIED |
| MEMinson Enterprises | Montebello | CA | — | ◇ UNVERIFIED |
| MSMississippi Steel Processing, LLC | Columbus | MS | — | ◇ UNVERIFIED |
| MMMitten Metal LLC | Hemlock | MI | — | ◇ UNVERIFIED |
| MSMixer Sheet Metal INC | Portland | OR | — | ◇ UNVERIFIED |
| MSMixer Sheet Metal INC | Clackamas | OR | — | ◇ UNVERIFIED |
| MIMj Industries | Georgetown | MA | — | ◇ UNVERIFIED |
| MCMk Custom Fabrication | Elizabeth | CO | — | ◇ UNVERIFIED |
| MLM L P Mfg INC | Spring Lake | MI | — | ◇ UNVERIFIED |
| MMM & M Extendo LLC | Boise | ID | — | ◇ UNVERIFIED |
| MMM & M EXTENDO LLC dba Extendo Bed | Eagle | ID | — | ◇ UNVERIFIED |
| MMM & M Manufacturing | Fort Worth | TX | — | ◇ UNVERIFIED |
| MMM & M Mfg | Garland | TX | — | ◇ UNVERIFIED |
| MSMmp Sheet Metal INC | La Habra | CA | — | ◇ UNVERIFIED |
| MMM & M Sheet Metal and Rain Gutters | Canyon Country | CA | — | ◇ UNVERIFIED |
| MIMndustries, INC. | Suwanee | GA | — | ◇ UNVERIFIED |
| MVModern-aire Ventilating INC | North Hollywood | CA | — | ◇ UNVERIFIED |
| MSModern Solutions of Bay County, INC. | Panama City | FL | — | ◇ UNVERIFIED |
| MTModern Tool INC | Coon Rapids | MN | — | ◇ UNVERIFIED |
| MMModular Metal Fabricators INC | Moreno Valley | CA | — | ◇ UNVERIFIED |
| MIModutek International LLC | Soperton | GA | — | ◇ UNVERIFIED |
| MOM - O Fabricating INC | Rice | MN | — | ◇ UNVERIFIED |
| MEMold Eliminators of Florida, INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| MTMolding Technologies, INC | Hebron | OH | — | ◇ UNVERIFIED |
| MHMonarch HVAC | Grand Rapids | MI | — | ◇ UNVERIFIED |
| MMMonarch Metal Manufacturing, INC. | Denver | CO | — | ◇ UNVERIFIED |
| MMMongoose Metals INC | Salem | OR | — | ◇ UNVERIFIED |
| MPMonroe Piping & Sheet Metal | Webster | NY | — | ◇ UNVERIFIED |
| MCMoonlight Custom Finishing | North Hollywood | CA | — | ◇ UNVERIFIED |
| MMMoonlight Manufacturing, INC. | Jurupa Valley | CA | — | ◇ UNVERIFIED |
| MDMoore Dp, LLC | Lexington | KY | — | ◇ UNVERIFIED |
| MMMoreng Metal Products | Totowa | NJ | — | ◇ UNVERIFIED |
| MSMountain States Sheet Metal | Pueblo | CO | — | ◇ UNVERIFIED |
| MIMrl Industries | Itasca | IL | — | ◇ UNVERIFIED |
| MIMrs Industrial, INC | Columbus | OH | — | ◇ UNVERIFIED |
| MIMsm Industries Incorporated | North Reading | MA | — | ◇ UNVERIFIED |
| MSMsm Sheet Metal | Sparks | NV | — | ◇ UNVERIFIED |
| MCMssm CORP | Pueblo Area | CO | — | ◇ UNVERIFIED |
| MPMtg Precision Sheet Metal | Pembroke | MA | — | ◇ UNVERIFIED |
| MHMTN Holdings LLC | Dover | NH | — | ◇ UNVERIFIED |
| MDMunters Des Champs | Buena Vista | VA | — | ◇ UNVERIFIED |
| MFMurray Fabrication Facility | Murray | UT | — | ◇ UNVERIFIED |
