| MCMadison County Millwork, Inc. | Anderson | IN | — | ◇ UNVERIFIED |
| MCMadison Crushing and Excavating Company INC | Madison | WI | — | ◇ UNVERIFIED |
| MFMadison Floor CO. INC. | Madison | VA | — | ◇ UNVERIFIED |
| MMMadison Marble Works, LLC | Madison | FL | — | ◇ UNVERIFIED |
| MMMadison Materials, LLC | Madison | WI | — | ◇ UNVERIFIED |
| MRMadison River Custom Works | Three Forks | MT | — | ◇ UNVERIFIED |
| MPMadmax Property Management, LLC | Barnstead | NH | — | ◇ UNVERIFIED |
| MSMadrona Stone, LLC | Sumner | WA | — | ◇ UNVERIFIED |
| MGMagallanes Granite and Marble | Denver | CO | — | ◇ UNVERIFIED |
| MCMagbee Contractors Supply | Winder | GA | — | ◇ UNVERIFIED |
| MSMaggies Shutters INC | Sun Valley | CA | — | ◇ UNVERIFIED |
| MSMagic Stone Granite | El Paso | TX | — | ◇ UNVERIFIED |
| MGMagma Granite & Marble, LLC. | Ocala | FL | — | ◇ UNVERIFIED |
| MWMagnolia Windows & Doors | Cornelia | GA | — | ◇ UNVERIFIED |
| MCMahoney Custom Interiors, LLC | Winston-salem | NC | — | ◇ UNVERIFIED |
| MCMahowald Cabinet INC | Savage | MN | — | ◇ UNVERIFIED |
| MFMaiman Fine Architectural Doors | Springfield | MO | — | ◇ UNVERIFIED |
| MOMaine Oar and Paddle Company | Orono | ME | — | ◇ UNVERIFIED |
| MSMaine Soapstone Company | Fort Fairfield | ME | — | ◇ UNVERIFIED |
| MCMainly Cabinets INC | Sherwood | OR | — | ◇ UNVERIFIED |
| MPMainor Pallet Company | Sparks | GA | — | ◇ UNVERIFIED |
| MMMajestic Marble Design | Palm Desert | CA | — | ◇ UNVERIFIED |
| MWMajestic Woodworking INC | Coon Rapids | MN | — | ◇ UNVERIFIED |
| MMMajesty Marble and Granite, INC. | Philadelphia | PA | — | ◇ UNVERIFIED |
| MMMajesty Marble and Granite, INC. | Aston | PA | — | ◇ UNVERIFIED |
| MLMajord, LLC | Lawrenceville | GA | — | ◇ UNVERIFIED |
| MFMake Fabrication LLC | Houston | TX | — | ◇ UNVERIFIED |
| MWMalone's Woodwork, Inc | Argyle | TX | — | ◇ UNVERIFIED |
| MSMalvaes Solutions, Incorporated | Chicago | IL | — | ◇ UNVERIFIED |
| MCMandina's Custom Cabinets | Anderson | CA | — | ◇ UNVERIFIED |
| MAM and K Pallets INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| MAM and M Pallet INC. | Blue Island | IL | — | ◇ UNVERIFIED |
| MAM and S Wood Works Pallets Inc | Lake Elsinore | CA | — | ◇ UNVERIFIED |
| MDManhattan Door Corporation | Carlstadt | NJ | — | ◇ UNVERIFIED |
| MEMankin Enterprises, LLC | Kansas City | MO | — | ◇ UNVERIFIED |
| MMManley Monuments | Lincoln | IL | — | ◇ UNVERIFIED |
| MMMannington Mills, INC. | San Jose | CA | — | ◇ UNVERIFIED |
| MWManor Woods Design LLC | Glen Arm | MD | — | ◇ UNVERIFIED |
| MLMansfield, LLC Dba the Stone Outlet | Boise | ID | — | ◇ UNVERIFIED |
| MLManstone, LLC | Colorado Springs | CO | — | ◇ UNVERIFIED |
| MMManuel Medina Sanchez Dba Ramona Pallets | Ramona | CA | — | ◇ UNVERIFIED |
| MPManuel Padilla Dba Gmc Pallet | Oakland | CA | — | ◇ UNVERIFIED |
| MPManufacturer's Pallet and Disposal, INC. | Waupaca | WI | — | ◇ UNVERIFIED |
| MCMaple Cabinet Company | Crosby | MN | — | ◇ UNVERIFIED |
| MVMaple Valley Pallet CO | Maple City | MI | — | ◇ UNVERIFIED |
| MCMaplewood Cabinetry | Glendale | AZ | — | ◇ UNVERIFIED |
| MAMarble and Granite Castle, INC. | Lake Park | FL | — | ◇ UNVERIFIED |
| MAMarble and Granite International, INC. | Waltham | MA | — | ◇ UNVERIFIED |
| MAMarble and Granite Pro | Peabody | MA | — | ◇ UNVERIFIED |
| MBMarble Bridge INC | Naples | FL | — | ◇ UNVERIFIED |
