| MEMarshall Erdman & Assoc | Waunakee | WI | — | ◇ UNVERIFIED |
| MBMartin Bros | Vallejo | CA | — | ◇ UNVERIFIED |
| MAMartins Appliance Warehouse | West Earl, Township of | PA | — | ◇ UNVERIFIED |
| MSMassey Steel Structures, LLC | Atlanta | GA | — | ◇ UNVERIFIED |
| MCMasterwork Components Inc | Kalispell | MT | — | ◇ UNVERIFIED |
| MDMaverick Development, INC. | Cotter | AR | — | ◇ UNVERIFIED |
| MMbci | Converse | TX | — | ◇ UNVERIFIED |
| MWMccandless Waimalu Properties LLC | Honolulu | HI | — | ◇ UNVERIFIED |
| MMMcelroy Metal Mill, INC. | Clinton | IL | — | ◇ UNVERIFIED |
| MMMcelroy Metal Mill, INC. | Alexandria | LA | — | ◇ UNVERIFIED |
| MMMcelroy Metal Mill INC Dba Mcelroy Metal | Adelanto | CA | — | ◇ UNVERIFIED |
| MPMdm Products, LLC | Milford | CT | — | ◇ UNVERIFIED |
| MCMedea Corporation | Ormond Beach | FL | — | ◇ UNVERIFIED |
| MMMeehleis Modular Buildings INC | Lodi | CA | — | ◇ UNVERIFIED |
| MAMerrillville Awnings LLC | Merrillville | IN | — | ◇ UNVERIFIED |
| MMMesco Metal Buildings | Southlake | TX | — | ◇ UNVERIFIED |
| MBMetal Building Masters, LLC | Mount Airy | NC | — | ◇ UNVERIFIED |
| MBMetal Building Products, Inc., Dba Spirco Manufacturing | Memphis | TN | — | ◇ UNVERIFIED |
| MBMetal Building Services | Ardmore | OK | — | ◇ UNVERIFIED |
| MBMetal Building Services, LLC | Semmes | AL | — | ◇ UNVERIFIED |
| MDMetal Design Systems, Inc. | Anamosa | IA | — | ◇ UNVERIFIED |
| MFMetal Framing Industries LLC | Valley View | OH | — | ◇ UNVERIFIED |
| MFMetal Framing Industries LLC | Cleveland | OH | — | ◇ UNVERIFIED |
| MIMetal Impressions, Inc. | Pittsboro | NC | — | ◇ UNVERIFIED |
| MMMetal Mart | La Grange | TX | — | ◇ UNVERIFIED |
| MRMetal Roofing Center & Supply | Punta Gorda | FL | — | ◇ UNVERIFIED |
| MDMetals Direct INC | Redding | CA | — | ◇ UNVERIFIED |
| MIMetfab, INC. | Houston | TX | — | ◇ UNVERIFIED |
| MAMetl-span a Division of Nci Group INC | Mattoon | IL | — | ◇ UNVERIFIED |
| MAMetl-span a Div of Nci Group INC | Jackson | MS | — | ◇ UNVERIFIED |
| MRMG Repair Services, Inc | Opa Locka | FL | — | ◇ UNVERIFIED |
| MMMisa Metal Fabricating INC | Pleasure Ridge Park | KY | — | ◇ UNVERIFIED |
| MIMish-Ra, Inc. | Santa Clara | CA | — | ◇ UNVERIFIED |
| MMMobile Mini, INC | Carson | CA | — | ◇ UNVERIFIED |
| MMMobile Mini - Maricopa Manufacturing Facility | Maricopa | AZ | — | ◇ UNVERIFIED |
| MMMobile Mini Storage Systems | Rialto | CA | — | ◇ UNVERIFIED |
| MIMods International | Appleton | WI | — | ◇ UNVERIFIED |
| MFModular Fabrication Incorporated | Dayton | OH | — | ◇ UNVERIFIED |
| MMModular Mini Storage INC | Tualatin | OR | — | ◇ UNVERIFIED |
| MIMonitor INC | Sherman | TX | — | ◇ UNVERIFIED |
 Morton Buildings | Cooperstown | NY | — | ◇ UNVERIFIED |
| Morton Buildings INC. | Morton | IL | — | ◇ UNVERIFIED |
| MOMsw Ornamental Fabricators, INC. | Memphis | TN | — | ◇ UNVERIFIED |
| MIMueller INC | Abilene | TX | — | ◇ UNVERIFIED |
| MIMueller, INC. | Port Allen | LA | — | ◇ UNVERIFIED |
| MSMyrmo & Son, INC. | Tucson | AZ | — | ◇ UNVERIFIED |
| NSNational Steel Products CO | Houston | TX | — | ◇ UNVERIFIED |
| NBNci Building Sys L P | Mattoon | IL | — | ◇ UNVERIFIED |
| NBNci Building Systems | Tallapoosa | GA | — | ◇ UNVERIFIED |
| NBNci Building Systems | Atwater | CA | — | ◇ UNVERIFIED |
