| LBLumbermens Building Center Kennewick | Kennewick | WA | — | ◇ UNVERIFIED |
| LOLundia-division of Mii INC | Jacksonville | IL | — | ◇ UNVERIFIED |
| LILur INC | Pomona | CA | — | ◇ UNVERIFIED |
| LLLuxView, LLC | Nashville | TN | — | ◇ UNVERIFIED |
| LWL W O Corporation | Portland | OR | — | ◇ UNVERIFIED |
| MHM2h2 Holdings LLC Dba Claborn Manufacturing | Tanner | AL | — | ◇ UNVERIFIED |
| MCMac Cal CO INC | San Jose | CA | — | ◇ UNVERIFIED |
| MWMagnolia Windows & Doors | Cornelia | GA | — | ◇ UNVERIFIED |
| MCMaiman Company (the)-springfield | Springfield | MO | — | ◇ UNVERIFIED |
| MFMaiman Fine Architectural Doors | Springfield | MO | — | ◇ UNVERIFIED |
| MWMajestic Woodworking INC | Coon Rapids | MN | — | ◇ UNVERIFIED |
| MWMalibu Window and Door | South El Monte | CA | — | ◇ UNVERIFIED |
| MDManhattan Door Corporation | Carlstadt | NJ | — | ◇ UNVERIFIED |
| MWManko Window Systems, INC. | Manhattan | KS | — | ◇ UNVERIFIED |
| MMMantua Manufacturing CO. | Tampa | FL | — | ◇ UNVERIFIED |
| MLMarvin Lumber - Cedar CO Dba Marvin Windows - Door | Warroad | MN | — | ◇ UNVERIFIED |
| MWMarvin Windows | Fargo | ND | — | ◇ UNVERIFIED |
| MWMarvin Windows & Doors | Warroad | MN | — | ◇ UNVERIFIED |
| MWMarvin Windows of Tennessee, INC. | Ripley | TN | — | ◇ UNVERIFIED |
| MSMasco Support Services | Cumberland | IN | — | ◇ UNVERIFIED |
| MHMascotte Home Security Products INC | Portland | OR | — | ◇ UNVERIFIED |
| MCMason Corporation | Birmingham | AL | — | ◇ UNVERIFIED |
| MMasonite | Walkerton | IN | — | ◇ UNVERIFIED |
| MAMasonite Architectural INC. | Northumberland | PA | — | ◇ UNVERIFIED |
| MCMasonite CORP | Marshfield | WI | — | ◇ UNVERIFIED |
| MCMasonite CORP | Algoma | WI | — | ◇ UNVERIFIED |
| MCMasonite Corp/northumberland Door Plt | Northumberland | PA | — | ◇ UNVERIFIED |
| MCMasonite Corporation | Haleyville | AL | — | ◇ UNVERIFIED |
| MCMasonite Corporation | Tampa | FL | — | ◇ UNVERIFIED |
| MCMasonite Corporation | Largo | FL | — | ◇ UNVERIFIED |
| MCMasonite Corporation | Mason City | IA | — | ◇ UNVERIFIED |
| MCMasonite Corporation | Mason City | IA | — | ◇ UNVERIFIED |
| MCMasonite Corporation | Denmark | SC | — | ◇ UNVERIFIED |
| MCMasonite Corporation | South Bend | IN | — | ◇ UNVERIFIED |
| MDMasonite Door Corporation | Richmond | IN | — | ◇ UNVERIFIED |
| MDMasonite Door Fabrication Services | Yulee | FL | — | ◇ UNVERIFIED |
| MIMasonite International | Winchester | VA | — | ◇ UNVERIFIED |
| MIMasonite International CORP. | Tampa | FL | — | ◇ UNVERIFIED |
| MIMasonite International Corporation | Thorp | WI | — | ◇ UNVERIFIED |
| MIMasonite International INC | Stockton | CA | — | ◇ UNVERIFIED |
| MMMasonite - Madison Location | Tampa | FL | — | ◇ UNVERIFIED |
| MSMastercare Shutter Corporation | Hobe Sound | FL | — | ◇ UNVERIFIED |
| MPMastercore Products | San Marcos | CA | — | ◇ UNVERIFIED |
| MWMaster Window Systems, INC. | Atlanta | GA | — | ◇ UNVERIFIED |
| MHMastic Home Exteriors, INC. | Sidney | OH | — | ◇ UNVERIFIED |
| MWMatheny Windows & Doors | San Leandro | CA | — | ◇ UNVERIFIED |
| MBMatthews Building Supply Company, INC. | Monroe | NC | — | ◇ UNVERIFIED |
| MDMaverick Door and Millwork, INC. | Schertz | TX | — | ◇ UNVERIFIED |
| MAM & a Windows, INC. | Lake Worth | FL | — | ◇ UNVERIFIED |
| MCM&b Carpentry and Manufacturing, INC. | Farmersville | CA | — | ◇ UNVERIFIED |
| MDMcfarland Door & Millwork LLC | Lakeview | OR | — | ◇ UNVERIFIED |
| MDMckendry Door Sales INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| MWMclachlan Wood Finishing CO | Mountain View | CA | — | ◇ UNVERIFIED |
| MSMCM Skylights LLC | Garland | TX | — | ◇ UNVERIFIED |
| MMMcphillips Mfg CO INC | Mobile | AL | — | ◇ UNVERIFIED |
| MIMcwi INC. | Jamaica | NY | — | ◇ UNVERIFIED |
| MUMdm Utah, LLC | South Salt Lake | UT | — | ◇ UNVERIFIED |
| MMMeddco Metals | Hayward | CA | — | ◇ UNVERIFIED |
| MIMesker Industries in | Hazelwood | MO | — | ◇ UNVERIFIED |
| MGMetal & Glass Solutions CORP. | Brooklyn | NY | — | ◇ UNVERIFIED |
 Metal Industries, INC. | Clearwater | FL | — | ◇ UNVERIFIED |
| MFMetalline Fire Door Co., INC. | Bronx | NY | — | ◇ UNVERIFIED |
| MPMetal Pro Group Inc | Dover | NJ | — | ◇ UNVERIFIED |
| MPMetal Pro Industries INC | Valencia | CA | — | ◇ UNVERIFIED |
| MSMetal Spray Painting, INC. | Coral Springs | FL | — | ◇ UNVERIFIED |
| MIMetrie INC | Rocklin | CA | — | ◇ UNVERIFIED |
| MSMetro Screenworks, INC. | Englewood | CO | — | ◇ UNVERIFIED |
| MIMgm Industries Incorporated | Hendersonville | TN | — | ◇ UNVERIFIED |
| MWMgm Window CO INC | Hendersonville | TN | — | ◇ UNVERIFIED |
| MWMiami Wall Systems, INC. | Hialeah | FL | — | ◇ UNVERIFIED |
| MMMicawrap Moulding | Riverbank | CA | — | ◇ UNVERIFIED |
| MDMichael D. Schoeneman | Rancho Cordova | CA | — | ◇ UNVERIFIED |
| MRMichael Reilly Design Incorporated / Dba Reilly Windows & Doors | Calverton | NY | — | ◇ UNVERIFIED |
| MCMid Central Door Company INC | Waite Park | MN | — | ◇ UNVERIFIED |
| MGMidland Garage Door Manufacturing Company | Chaska | MN | — | ◇ UNVERIFIED |
| MGMidland Garage Door Manufacturing Company | West Fargo | ND | — | ◇ UNVERIFIED |
| MWMidsouth Window Fashions LLC | Memphis | TN | — | ◇ UNVERIFIED |
| MCMidwest Curtainwalls | Cuyahoga Heights | OH | — | ◇ UNVERIFIED |
| MWMidwestern Wood Products | Morton | IL | — | ◇ UNVERIFIED |
| MFMidwest Fabrication & Welding, LLC | Tipton | IA | — | ◇ UNVERIFIED |
| MMMidwest Manufacturing | Sullivan | MO | — | ◇ UNVERIFIED |
| MMMidwest Manufacturing | Holiday City | OH | — | ◇ UNVERIFIED |
| MWMidwest Window and Door | Springfield | MO | — | ◇ UNVERIFIED |
| MWMidwest Window Systems, LLC | Rogers | MN | — | ◇ UNVERIFIED |
| MWMidwest Window Systems, LLC Limited Liability Company | Saint Michael | MN | — | ◇ UNVERIFIED |
| MPMike Papian | Pacoima | CA | — | ◇ UNVERIFIED |
| MBMilco Building Products, INC. | Swainsboro | GA | — | ◇ UNVERIFIED |
| MCMil-del Corporation | Milford | DE | — | ◇ UNVERIFIED |
| MMMilgard Manufacturing INC | Temecula | CA | — | ◇ UNVERIFIED |
| MMMilgard Manufacturing INC Fiberglass | Fife | WA | — | ◇ UNVERIFIED |
| MMMilgard Mfg INC | Tacoma | WA | — | ◇ UNVERIFIED |
| MWMilgard Windows | Sacramento | CA | — | ◇ UNVERIFIED |
| MWMilgard Windows & Doors | Aurora | CO | — | ◇ UNVERIFIED |
| MLMillcraft LLC | Minneapolis | MN | — | ◇ UNVERIFIED |
| MDMillennium Doors and Windows Inc | Isabela | PR | — | ◇ UNVERIFIED |
| MDMillennium Doors and Windows Inc. | Isabela | PR | — | ◇ UNVERIFIED |
| MMMiller Manufacturing, INC. | Sugarcreek | OH | — | ◇ UNVERIFIED |
| MMMilliken Millwork INC | Sterling Heights | MI | — | ◇ UNVERIFIED |
| MAMillwork and Design INC. | Brooksville | FL | — | ◇ UNVERIFIED |
| MBMillwork Brothers INC | Cerritos | CA | — | ◇ UNVERIFIED |
