| MEMartin Enterprises Dba Tj Composites | Nuevo | CA | — | ◇ UNVERIFIED |
| MMMartin Marietta | Malvern | AR | — | ◇ UNVERIFIED |
| MMMartin Marietta Aggregates - Fairfield | Fairfield | OH | — | ◇ UNVERIFIED |
| MMMartin Marietta - Del Camino Ready Mix | Longmont | CO | — | ◇ UNVERIFIED |
| MMMartin Marietta Materials, INC Dba I-75 Quarry (east) | Heiskell | TN | — | ◇ UNVERIFIED |
| MMMartin Marietta Materials INC – East Division | Newport News | VA | — | ◇ UNVERIFIED |
| MMMartin Marietta Materials INC - Fairborn | Medway | OH | — | ◇ UNVERIFIED |
| MMMartin Marietta Materials - Kirby | San Antonio | TX | — | ◇ UNVERIFIED |
| MMMartin Marietta Materials, St. Paul Asphalt Terminal | Newport | MN | — | ◇ UNVERIFIED |
| MMMartin Marietta Mat - Port Hmap & Gen | Colorado Springs | CO | — | ◇ UNVERIFIED |
| MMMartin Marietta - Monaghan Materials Fac | Aurora | CO | — | ◇ UNVERIFIED |
| MMMartin Marietta Mtrls - Batch Plant | Estes Park | CO | — | ◇ UNVERIFIED |
| MMMartin Marietta Mtrls - Batch Plant | Littleton | CO | — | ◇ UNVERIFIED |
| MMMartin Marietta - Pueblo Asphalt Plant | Pueblo | CO | — | ◇ UNVERIFIED |
| MMMartin Marietta Rigden Ready Mix | Fort Collins | CO | — | ◇ UNVERIFIED |
| MMMartin Marietta - Spec Agg | Golden | CO | — | ◇ UNVERIFIED |
| MMMartin Marietta - Taft Asphalt | Fort Collins | CO | — | ◇ UNVERIFIED |
| MCMartinsville Concrete Products INC | Martinsville | VA | — | ◇ UNVERIFIED |
| MPMaryland Paving Churchville | Bel Air | MD | — | ◇ UNVERIFIED |
| MRMarysville Ready Mix Co., INC. | Marysville | KS | — | ◇ UNVERIFIED |
| MIMar-zane INC | Delaware | OH | — | ◇ UNVERIFIED |
| MIMar-zane, INC | Indianapolis | IN | — | ◇ UNVERIFIED |
| MIMar-zane, INC. | Noblesville | IN | — | ◇ UNVERIFIED |
| MIMar-zane INC Plant 2 | Marietta | OH | — | ◇ UNVERIFIED |
| MIMar-zane, INC. Plant #24 | Akron | OH | — | ◇ UNVERIFIED |
| MIMar-zane INC Plant 27 | Warren | OH | — | ◇ UNVERIFIED |
| MIMar-zane, INC. - Plant 28 | Youngstown | OH | — | ◇ UNVERIFIED |
| MPMar-zane Plant No 10 | Zanesville | OH | — | ◇ UNVERIFIED |
| MZMar Zane Plant No 4 (0637000000) | Haydenville | OH | — | ◇ UNVERIFIED |
| MZMar Zane Plant No 5 | Stockport | OH | — | ◇ UNVERIFIED |
| MZMar Zane Plant No 9 | Richmond Dale | OH | — | ◇ UNVERIFIED |
| MZMar Zane Plant No 9 (0671000006) | Chillicothe | OH | — | ◇ UNVERIFIED |
| MZMar Zane Portable Generator #6 | Grove City | OH | — | ◇ UNVERIFIED |
| MPMar-zane Portable Generator #8 | Marion | OH | — | ◇ UNVERIFIED |
| MMaschmeyer-apollo(blk/rm) | Apollo Beach | FL | — | ◇ UNVERIFIED |
| MBMaschmeyer - Brooksville | Brooksville | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Cbp - Melbourne | Melbourne | FL | — | ◇ UNVERIFIED |
| MPMaschmeyer-cement Products | Lakeland | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete Company - Apollo | Apollo Beach | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete Company of Florida | West Palm Beach | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete Company of Florida | Deltona | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete CO of Florida INC | Davenport | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete CO of Florida INC | Casselberry | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete CO of Florida INC | Debary | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete-deltona Concrete Batch Plant | Deltona | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete-st Cloud | Saint Cloud | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete Taft Facility | Orlando | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete - Winter Beach | Winter Beach | FL | — | ◇ UNVERIFIED |
| MRMaschmeyer-lakeland Rm | Lakeland | FL | — | ◇ UNVERIFIED |
| MRMaschmeyer-loughman Rm | Davenport | FL | — | ◇ UNVERIFIED |
| MRMaschmeyer-melbourne Rm | Melbourne | FL | — | ◇ UNVERIFIED |
| MRMaschmeyer-onsite-universal Rm | Orlando | FL | — | ◇ UNVERIFIED |
| MRMaschmeyer-sligh Rm | Tampa | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer-st. Cloud Rm | Saint Cloud | FL | — | ◇ UNVERIFIED |
| MMaschmeyer-vero(blk-rm) | Vero Beach | FL | — | ◇ UNVERIFIED |
| MDMasco Dba Knife River 00386 | Portable | ID | — | ◇ UNVERIFIED |
| MRMassey Ready-mix Concrete, INC. | Greensboro | NC | — | ◇ UNVERIFIED |
| MAMassillon Asphalt Company (1576001624) | Massillon | OH | — | ◇ UNVERIFIED |
| MAMaster Aggregates Carolina | Carolina | PR | — | ◇ UNVERIFIED |
| MAMaster Aggregates Plant 5 | Caguas | PR | — | ◇ UNVERIFIED |
| MCMaster Concrete Plant 5 | San Juan | PR | — | ◇ UNVERIFIED |
| MMMaterial Management - American Concrete | Arkansas City | KS | — | ◇ UNVERIFIED |
| MMMaterial Management - Daniels Ready Mix | Winfield | KS | — | ◇ UNVERIFIED |
| MPMaterials Packaging CORP | Oklahoma City | OK | — | ◇ UNVERIFIED |
| MCMathias Concrete - Alamosa Plant | Alamosa | CO | — | ◇ UNVERIFIED |
| MCMathias Concrete INC | Monte Vista | CO | — | ◇ UNVERIFIED |
| MCMathias Concrete - South Fork | South Fork | CO | — | ◇ UNVERIFIED |
| MCMathy Construction Company - Plant 25 | Onalaska | WI | — | ◇ UNVERIFIED |
| MCMathy Construction CO Plant 24 | Ironwood | MI | — | ◇ UNVERIFIED |
| MCMathy Construction CO Plant 41 | Ironwood | MI | — | ◇ UNVERIFIED |
| MMMattern Materials | Boonsboro | MD | — | ◇ UNVERIFIED |
| MCMatthews C W Contracting CO INC Plt 22 | Toccoa | GA | — | ◇ UNVERIFIED |
| MCMatthews C W Contracting CO INC Plt 52 | Gainesville | GA | — | ◇ UNVERIFIED |
| MCMatthews C W Contracting CO INC Plt 56 | Forest Park | GA | — | ◇ UNVERIFIED |
| MCMatthews C W Contracting CO INC Plt 63 | Stockbridge | GA | — | ◇ UNVERIFIED |
| MCMatthews C W Contracting CO INC Plt 64 | Tyrone | GA | — | ◇ UNVERIFIED |
| MCMatthews C W Contracting CO INC Plt 65 | Tyrone | GA | — | ◇ UNVERIFIED |
| MCMatthews C W Contracting Co, Plt 11 | Dahlonega | GA | — | ◇ UNVERIFIED |
| MCMatthews C W Contracting CO Plt 12 | Douglasville | GA | — | ◇ UNVERIFIED |
| MCMatthews, C.w., Plt 06 | Cartersville | GA | — | ◇ UNVERIFIED |
| MCMatthews, C.w., Plt 24 | Rockmart | GA | — | ◇ UNVERIFIED |
| MPMattingly Products | North Anson | ME | — | ◇ UNVERIFIED |
| MMMaymead Materials, INC. | Mountain City | TN | — | ◇ UNVERIFIED |
| MRMayo Ready Mix Concrete Sr 51 | Mayo | FL | — | ◇ UNVERIFIED |
| MCMcatee Construction Dba Mcatee Paving CO. | Sterling | CO | — | ◇ UNVERIFIED |
| MCMcatee Const - Sterling Asphalt Plant | Sterling | CO | — | ◇ UNVERIFIED |
| MPMcatee Paving Company (cmi 4dm) | Sterling | CO | — | ◇ UNVERIFIED |
| MHMccarthy Henderson Concrete Batch Plant | Henderson | NC | — | ◇ UNVERIFIED |
| MIMccarthy Improvement CO | Colona | IL | — | ◇ UNVERIFIED |
| MIMccarthy Improvement CO | East Moline | IL | — | ◇ UNVERIFIED |
| MIMccarthy Improvement Co.(epd-wcd) | Vienna | GA | — | ◇ UNVERIFIED |
| MIMccarthy Improvement Company | Atlanta | GA | — | ◇ UNVERIFIED |
| MIMccarthy Improvement Concrete Batch Plant | Rome | GA | — | ◇ UNVERIFIED |
| MCMccartney Construction CO INC | Ashville | AL | — | ◇ UNVERIFIED |
| MCMcclure Concrete Company INC - Lebanon | Lebanon | VA | — | ◇ UNVERIFIED |
| MCMccoig Concrete-springwells | Detroit | MI | — | ◇ UNVERIFIED |
| MEMccormick Excavation & Paving (asphalt Plnt)(portable)(air) | Portable | KS | — | ◇ UNVERIFIED |
| MEMccormick Excav & Paving - Colorado Ave | Burlington | CO | — | ◇ UNVERIFIED |
| MEMccormick Exc & Paving - Port Hm Asphalt | Stratton | CO | — | ◇ UNVERIFIED |
| MCMccreary County Ready Mix | Whitley City | KY | — | ◇ UNVERIFIED |
