| MPMarble & Polish, INC. | Malden | MA | — | ◇ UNVERIFIED |
| MSMarble Shop | Greenfield | TN | — | ◇ UNVERIFIED |
| MSMarble Shop INC | Pittsburg | CA | — | ◇ UNVERIFIED |
| MVMarble Ventures, INC. | Ogden | UT | — | ◇ UNVERIFIED |
| MWMarble Works of Pensacola, INC. | Pensacola | FL | — | ◇ UNVERIFIED |
| MMMarc Mahowald Dba Stone on Demand | Lake Elmo | MN | — | ◇ UNVERIFIED |
| MPMarc Prause and Jessica Prause | Carson City | NV | — | ◇ UNVERIFIED |
| MCMarion Cultured Marble, Incorporated Dba Wilson Ma | Marion | NC | — | ◇ UNVERIFIED |
| MHMarmol Hawaii INC. | Honolulu | HI | — | ◇ UNVERIFIED |
| MGMarmolite Granite - Marble INC | Wilmington | NC | — | ◇ UNVERIFIED |
| MOMarquardt Outdoors, Llcdba Davis Tent an D Awning | Denver | CO | — | ◇ UNVERIFIED |
| MMMarshwood Manufacturing | Throop | PA | — | ◇ UNVERIFIED |
| MMMartin Marietta Materials, INC. - Rocky Point | Rocky Point | NC | — | ◇ UNVERIFIED |
| MMMartin Marietta San Diego Aggregates, Llc-lakeside Hma | Lakeside | CA | — | ◇ UNVERIFIED |
| MSMartus Stone, LLC. | Elkhart | TX | — | ◇ UNVERIFIED |
| MLMarvin L Walker & Assoc | Norcross | GA | — | ◇ UNVERIFIED |
| MPMaryland Paving Churchville | Bel Air | MD | — | ◇ UNVERIFIED |
| MPMaryland Place Holder 15 | Elkridge | MD | — | ◇ UNVERIFIED |
| MSMaryland Style Marble & Granite, INC | Edgewater | MD | — | ◇ UNVERIFIED |
| MMMaryville Monument LLC | Maryville | TN | — | ◇ UNVERIFIED |
| MSMasonville Stone | Masonville | NY | — | ◇ UNVERIFIED |
| MIMass-granite, INC. | Acton | MA | — | ◇ UNVERIFIED |
| MLMass Lite Div | Plainville | MA | — | ◇ UNVERIFIED |
| MMMaster Marble INC Holden | Holden | MO | — | ◇ UNVERIFIED |
| MSMaster Stone, LLC | Sheridan | CO | — | ◇ UNVERIFIED |
| MSMaster Stone Plus, INC | Orlando | FL | — | ◇ UNVERIFIED |
| MZmatrix z llc | Fort Lauderdale | FL | — | ◇ UNVERIFIED |
| MZmatrix z llc | Fort Lauderdale | FL | — | ◇ UNVERIFIED |
 Matthews International Corporation | Whittier | CA | — | ◇ UNVERIFIED |
| MPMatzke Properties LAX, LLC | La Crosse | WI | — | ◇ UNVERIFIED |
| MMMaurice Moore Memorials | Chicago Ridge | IL | — | ◇ UNVERIFIED |
| MIMcad Inc., | Greensboro | NC | — | ◇ UNVERIFIED |
| MIMcad Inc., Dba Carolina Custom Surfaces | Greensboro | NC | — | ◇ UNVERIFIED |
| MSMcclain Stone CO. INC. Brooklyn Saw Shop | Kingsley | PA | — | ◇ UNVERIFIED |
| MSMcfarren Slate | Granville | NY | — | ◇ UNVERIFIED |
| MMMdm Marble CO | Florida | FL | — | ◇ UNVERIFIED |
| MMMediterranean Marble of the Gulf Coast | Naples | FL | — | ◇ UNVERIFIED |
| MGMega Granite & Marble, INC. | Newnan | GA | — | ◇ UNVERIFIED |
| MIMegastone, Inc. | South Easton | MA | — | ◇ UNVERIFIED |
| MSMelville Stone LLC | Enterprise | OR | — | ◇ UNVERIFIED |
| MSMelvin Stone Company LLC | Sabina | OH | — | ◇ UNVERIFIED |
| MCMEM Co., LLC | Pearl River | NY | — | ◇ UNVERIFIED |
| MSMeno Stone CO. INC. | Lemont | IL | — | ◇ UNVERIFIED |
| MMMerlino Marble and Granite, INC. | Cape May Court House | NJ | — | ◇ UNVERIFIED |
| MTMesa Tile & Stone, INC. | Boise | ID | — | ◇ UNVERIFIED |
| MSMeshoppen Stone INC. | Meshoppen | PA | — | ◇ UNVERIFIED |
| MGMetro Granite, LLC | Oklahoma City | OK | — | ◇ UNVERIFIED |
| MGMetro Granite & Marble INC | Denver | CO | — | ◇ UNVERIFIED |
| MMMetro Marble & Granite, LLC | Columbia | MO | — | ◇ UNVERIFIED |
| MLMfi, LLC | Winterset | IA | — | ◇ UNVERIFIED |
| MFMichaelangelo Fabrication & Installation | La Mirada | CA | — | ◇ UNVERIFIED |
| MKMichigan Kitchen Distributors | Marshall | MI | — | ◇ UNVERIFIED |
| MMMiddleton Memorials of Georgia, INC. | Blakely | GA | — | ◇ UNVERIFIED |
| MCMidland Cut Stone Company, INC. | Bloomington | IN | — | ◇ UNVERIFIED |
| MMMidland Marble & Granite, LLC | Independence | MO | — | ◇ UNVERIFIED |
| MBMidwestern Bioag Holdings LLC | Davenport | IA | — | ◇ UNVERIFIED |
| MRMidwest Rock Tops, LLC | Madison | WI | — | ◇ UNVERIFIED |
| MSMidwest Stone, INC. | Plainfield | IL | — | ◇ UNVERIFIED |
| MSMidwest Stone Manufacturing Company | Tea | SD | — | ◇ UNVERIFIED |
| MCMike Chandley Dba Chandleys Granite Connection | Granite Falls | NC | — | ◇ UNVERIFIED |
| MGMilano Granite & Marble | Staten Island | NY | — | ◇ UNVERIFIED |
| MSMillennium Stone, INC. | Johnsburg | IL | — | ◇ UNVERIFIED |
| MDMillstone Development LLC | Southampton | NY | — | ◇ UNVERIFIED |
| MMMillstone Marble and Tile LLC | Bellport | NY | — | ◇ UNVERIFIED |
| MGMinami Granite Designs INC | Ocala | FL | — | ◇ UNVERIFIED |
| MLMisb, LLC | Colorado Springs | CO | — | ◇ UNVERIFIED |
| MGMize Granite Sales | Elberton | GA | — | ◇ UNVERIFIED |
| MIM.j. International, LLC | Denver | CO | — | ◇ UNVERIFIED |
| MMM - M Stone Sculpting | Todd | NC | — | ◇ UNVERIFIED |
| MLMne LLC | Needham Heights | MA | — | ◇ UNVERIFIED |
| MLMne LLC | Woburn | MA | — | ◇ UNVERIFIED |
| MCModern Countertops | Springfield | IL | — | ◇ UNVERIFIED |
| MPModerno Porcelain San Diego LLC | Santee | CA | — | ◇ UNVERIFIED |
| MSModern Stonesville, LLC | Elberton | GA | — | ◇ UNVERIFIED |
| MSModlich Stoneworks, INC. | Columbus | OH | — | ◇ UNVERIFIED |
| MIMogastone, INC. | Cary | NC | — | ◇ UNVERIFIED |
| MMMonarch Marble INC | Denver | CO | — | ◇ UNVERIFIED |
| MMMonumental Memories Inc. | Fresh Meadows | NY | — | ◇ UNVERIFIED |
| MSMonumental Sales INC | Saint Cloud | MN | — | ◇ UNVERIFIED |
| MPMonument Place LLC | Mcalester | OK | — | ◇ UNVERIFIED |
| MSMooney Stoneworks Inc | Saint Petersburg | FL | — | ◇ UNVERIFIED |
| MEMoreau Enterprises, INC. | College Station | TX | — | ◇ UNVERIFIED |
| MAMortuary Associates Company | Northville | MI | — | ◇ UNVERIFIED |
| MMMountain Marble - Granite, INC. | Biltmore Forest | NC | — | ◇ UNVERIFIED |
| MSMountain State Stone | Denver | CO | — | ◇ UNVERIFIED |
| MSMountain Stone, Tile & Marble, LLC | Montrose | CO | — | ◇ UNVERIFIED |
| MSMova Stone INC | Sacramento | CA | — | ◇ UNVERIFIED |
| MCMpl CORP | Fairland | IN | — | ◇ UNVERIFIED |
| MCMtg Corporation | Sheridan | CO | — | ◇ UNVERIFIED |
| MFMultistone Florida Inc | Tallahassee | FL | — | ◇ UNVERIFIED |
| MFMultistone Florida Inc | Tallahassee | FL | — | ◇ UNVERIFIED |
| MSMultistone SC, Inc | North Charleston | SC | — | ◇ UNVERIFIED |
| MIMusa, INC. | Terrytown | LA | — | ◇ UNVERIFIED |
| MGMy Granite Guys, INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| NGN2 Granite, INC. | Mooresville | NC | — | ◇ UNVERIFIED |
| NQNagy Quality Stone INC | Cleveland | OH | — | ◇ UNVERIFIED |
| NMNaka's Marble & Solid Surface LLC | Honolulu | HI | — | ◇ UNVERIFIED |
| NMNapoli Marble & Granite Design, Ltd. | Seaford | NY | — | ◇ UNVERIFIED |
| NGNational Granite Luxuries | Medina | OH | — | ◇ UNVERIFIED |
| NMNational Marble & Granite | Springdale | AR | — | ◇ UNVERIFIED |
