| MRMaschmeyer-sligh Rm | Tampa | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer-st. Cloud Rm | Saint Cloud | FL | — | ◇ UNVERIFIED |
| MMaschmeyer-vero(blk-rm) | Vero Beach | FL | — | ◇ UNVERIFIED |
| MZMaschmeyer - Zephyrhills | Zephyrhills | FL | — | ◇ UNVERIFIED |
| MLMassarelli's Lawn Ornaments, INC. | Hammonton | NJ | — | ◇ UNVERIFIED |
| MPMaterial Packaging INC. | Memphis | TN | — | ◇ UNVERIFIED |
| MPMaterials Packaging CORP | Oklahoma City | OK | — | ◇ UNVERIFIED |
| MSMccabe Sand & Gravel | Taunton | MA | — | ◇ UNVERIFIED |
| MCMccoig Concrete-springwells | Detroit | MI | — | ◇ UNVERIFIED |
| MCMcminnville Concrete | Mcminnville | OR | — | ◇ UNVERIFIED |
| MCMechanicsville Concrete Llc-airport Plant (oakleys Lane) | Henrico | VA | — | ◇ UNVERIFIED |
| MCMechanicsville Concrete LLC - Chesterfield Plant | Midlothian | VA | — | ◇ UNVERIFIED |
| MPMelissa Plant | Melissa | TX | — | ◇ UNVERIFIED |
| MCMerit Concrete | Laurel | MD | — | ◇ UNVERIFIED |
| MMMesa Materials | Phoenix | AZ | — | ◇ UNVERIFIED |
| MCMetal Crafters | Ronkonkoma | NY | — | ◇ UNVERIFIED |
| MMetalico-evans | Atlanta | GA | — | ◇ UNVERIFIED |
| MCMetro Concrete | Ocean Springs | MS | — | ◇ UNVERIFIED |
| MMMetro Materials INC Cordova | Cordova | TN | — | ◇ UNVERIFIED |
| MMMetro Mix LLC | Denver | CO | — | ◇ UNVERIFIED |
| MRMetromont:clemson Ready-mix Plant | Seneca | SC | — | ◇ UNVERIFIED |
| MMMetromont Materials CORP Holly Hill | Holly Hill | SC | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation - Hamlet Plant | Hamlet | NC | — | ◇ UNVERIFIED |
| MPMetromont Paris Mountain | Greenville | SC | — | ◇ UNVERIFIED |
| MMMeyer Material CO Kenosha 20 | Kenosha | WI | — | ◇ UNVERIFIED |
| MMMeyer Material CO Kenosha 40 | Kenosha | WI | — | ◇ UNVERIFIED |
| MMMeyer Material CO Middlebury Ready Mix Plant | Middlebury | IN | — | ◇ UNVERIFIED |
| MMMeyer Material Company | Milwaukee | WI | — | ◇ UNVERIFIED |
| MMMeyer Material CO Warsaw Ready Mix Plant | Warsaw | IN | — | ◇ UNVERIFIED |
| MCMica Company of Canada INC | Newport News | VA | — | ◇ UNVERIFIED |
 Michigan Paving and Materials, Klett Asphalt Plant | Paw Paw | MI | — | ◇ UNVERIFIED |
| Michigan Paving and Materials - Spartan Asphalt | Lansing | MI | — | ◇ UNVERIFIED |
| Michigan Paving and Materials- Woodland | Comstock Park | MI | — | ◇ UNVERIFIED |
| MPMichigan Paving & Materials CO | Jackson | MI | — | ◇ UNVERIFIED |
| MPMichigan Paving & Materials CO. | Grand Rapids | MI | — | ◇ UNVERIFIED |
| MPMichigan Paving & Materials CO. | Monroe | MI | — | ◇ UNVERIFIED |
| MPMichigan Paving & Materials CO. Kalamazoo Asphalt | Kalamazoo | MI | — | ◇ UNVERIFIED |
| MAMid America Equipment Services | Hurst | TX | — | ◇ UNVERIFIED |
| MCMid Continent Concrete CO / 431 W 23rd St Tulsa Facility | Tulsa | OK | — | ◇ UNVERIFIED |
| MAMidland Asphalt Materials | Clearfield | PA | — | ◇ UNVERIFIED |
| MAMidland Asphalt Materials INC | Tonawanda | NY | — | ◇ UNVERIFIED |
| MAMidland Asphalt Materials, INC. | Bloomsburg | PA | — | ◇ UNVERIFIED |
| MPMidlothian Plant | Midlothian | TX | — | ◇ UNVERIFIED |
| MPMidsouth Paving, INC. Dba Midsouth Aggregates (forsyth Quarry) | Suwanee | GA | — | ◇ UNVERIFIED |
| MBMidtown Batch Plant | Oklahoma City | OK | — | ◇ UNVERIFIED |
| MPMidwest Precast Concrete Enterprises INC | Mount Pleasant | IA | — | ◇ UNVERIFIED |
| MPMidwest Premix - Jefferson City | Jefferson City | MO | — | ◇ UNVERIFIED |
| MCMilestone Contractors, L.p. | Indianapolis | IN | — | ◇ UNVERIFIED |
| MMMiller Material CO | Kansas City | MO | — | ◇ UNVERIFIED |
| MAMiramar Asphalt | San Diego | CA | — | ◇ UNVERIFIED |
