| MCMid Continent Concrete Company | Edmond | OK | — | ◇ UNVERIFIED |
| MRMiddletown Ready Mix Concrete Plant | Townsend | DE | — | ◇ UNVERIFIED |
| MHMid Hudson Concrete Products, INC | Hasbrouck Heights | NJ | — | ◇ UNVERIFIED |
| MCMid-illinois Concrete | Greenville | IL | — | ◇ UNVERIFIED |
| MCMid-illinois Concrete INC | Olney | IL | — | ◇ UNVERIFIED |
| MCMid-illinois Concrete INC | Charleston | IL | — | ◇ UNVERIFIED |
| MCMid-illinois Concrete INC | Mattoon | IL | — | ◇ UNVERIFIED |
| MCMid-illinois Concrete INC | Ramsey | IL | — | ◇ UNVERIFIED |
| MCMid-illinois Concrete INC | Altamont | IL | — | ◇ UNVERIFIED |
| MCMidland Concrete Products | Hiawatha | IA | — | ◇ UNVERIFIED |
| MPMidlothian Plant | Midlothian | TX | — | ◇ UNVERIFIED |
| MCMid-minnesota Concrete LLC | Annandale | MN | — | ◇ UNVERIFIED |
| MCMidstate Concrete Products, LLC. | Santa Maria | CA | — | ◇ UNVERIFIED |
| MMMid-state Mobile Concrete INC | Hermitage | TN | — | ◇ UNVERIFIED |
| MPMid-state Precast | Sebring | FL | — | ◇ UNVERIFIED |
| MPMid-state Precast, L.p. | Corcoran | CA | — | ◇ UNVERIFIED |
| MCMidwest Concrete Materials - Holton Ready Mix Concrete Plant (water) | Holton | KS | — | ◇ UNVERIFIED |
| MCMidwest Concrete Materials - Osage City Ready Mix Concrete Plant (water) | Osage City | KS | — | ◇ UNVERIFIED |
| MMMidwest Manufacturing | Pioneer | OH | — | ◇ UNVERIFIED |
| MMMidwest Mobile Mix LLC | Bishop | TX | — | ◇ UNVERIFIED |
| MPMidwest Product Group | Shawnee | KS | — | ◇ UNVERIFIED |
| MPMidwest Products LLC | Hanover | KS | — | ◇ UNVERIFIED |
| MRMidwest Ready Mix | Hiawatha | KS | — | ◇ UNVERIFIED |
| MRMidwest Ready-mix and Building Supplies, INC. | Sabetha | KS | — | ◇ UNVERIFIED |
| MRMidwest Ready Mix & Building-hiawatha | Hiawatha | KS | — | ◇ UNVERIFIED |
| MRMidwest Ready Mix & Building Supplies | Sabetha | KS | — | ◇ UNVERIFIED |
| MRMidwest Ready Mix - Sabetha | Sabetha | KS | — | ◇ UNVERIFIED |
 Miles Sand & Gravel CO | Auburn | WA | — | ◇ UNVERIFIED |
| Miles Sand & Gravel CO | Puyallup | WA | — | ◇ UNVERIFIED |
| Miles Sand & Gravel Company | Everett | WA | — | ◇ UNVERIFIED |
| Miles Sand & Gravel Company Poulsbo Facility | Poulsbo | WA | — | ◇ UNVERIFIED |
| MEMillard Enterprises, LLC | East Syracuse | NY | — | ◇ UNVERIFIED |
| MCMill Creek Concrete Batch Plant | Dallas | TX | — | ◇ UNVERIFIED |
| MAMiller and Sons Excavating | Heppner | OR | — | ◇ UNVERIFIED |
| MCMiller Contracting Services INC | Dahlgren | IL | — | ◇ UNVERIFIED |
| MLMiller & Long Construction INC | Mc Lean | VA | — | ◇ UNVERIFIED |
| MPMiller-mize Precast INC. | Columbus | GA | — | ◇ UNVERIFIED |
| MMMillers Mini Mix Concrete INC | Hillsboro | OR | — | ◇ UNVERIFIED |
| MCMillington Concrete | Coos Bay | OR | — | ◇ UNVERIFIED |
| MBMillstone Bangert Concret | Saint Charles | MO | — | ◇ UNVERIFIED |
| MBMillstone Bangert Inc-missouri Bottom Road Plant | Saint Louis | MO | — | ◇ UNVERIFIED |
| MWMillstone Weber | Mascoutah | IL | — | ◇ UNVERIFIED |
| MWMillstone Weber Portable Concrete Batch Plant ** Inactive ** | Jacksonville | NC | — | ◇ UNVERIFIED |
| MWMillstone Weber - Port Batch Plant #7001 | Saint Charles | MO | — | ◇ UNVERIFIED |
| MLMinden Lumber & Concrete INC | Minden | NE | — | ◇ UNVERIFIED |
| MPMineral Processing Specialties Inc. | Springdale | PA | — | ◇ UNVERIFIED |
| MWMineral Wells Cbp | Mineral Wells | TX | — | ◇ UNVERIFIED |
| MCMini Concrete Ne Plant | El Paso | TX | — | ◇ UNVERIFIED |
| MMMinnick Midwest LLC Dba Midwest Tile & Concrete Products | Woodburn | IN | — | ◇ UNVERIFIED |
| MCMission Concrete Products | Shawneetown | IL | — | ◇ UNVERIFIED |
| MRMission Ready Mix Plant | Mission | TX | — | ◇ UNVERIFIED |
| MVMission Valley Concrete | Pablo | MT | — | ◇ UNVERIFIED |
| MMMississippi Material Co., INC. | Vicksburg | MS | — | ◇ UNVERIFIED |
| MRMissoula Ready Mix | Missoula | MT | — | ◇ UNVERIFIED |
| MWMissouri Wilbert Vault CO. INC. | Moberly | MO | — | ◇ UNVERIFIED |
| MCMitchell Concrete Pipe CO. INC. | Saginaw | AL | — | ◇ UNVERIFIED |
| MPMix Pro Concrete LLC | Cordova | TN | — | ◇ UNVERIFIED |
| MAMm - Afton Portable Ready-mix | Afton | TX | — | ◇ UNVERIFIED |
| MAMmc Aws Jan 200 | Jackson | MS | — | ◇ UNVERIFIED |
| MRMmci Ready Mix LLC | North Hills | CA | — | ◇ UNVERIFIED |
 Mmc Materials Gulf Coast, Llc- Amc Portable | Calvert | AL | — | ◇ UNVERIFIED |
| Mmc Materials Gulf Coast LLC - Four Points | Tallahassee | FL | — | ◇ UNVERIFIED |
 Mmc Materials INC - Columbus South | Columbus | MS | — | ◇ UNVERIFIED |
| Mmc Materials Inc, Dundee Wind Farm | Dundee | MS | — | ◇ UNVERIFIED |
| Mmc Materials Inc, Hernando Temp Site | Hernando | MS | — | ◇ UNVERIFIED |
| Mmc Materials, INC. - Piperton Plant | Collierville | TN | — | ◇ UNVERIFIED |
| MCMm - Crandall Rm | Crandall | TX | — | ◇ UNVERIFIED |
| MDMm Decatur Ready Mix | Decatur | TX | — | ◇ UNVERIFIED |
| MRMm -farmersville Rm | Farmersville | TX | — | ◇ UNVERIFIED |
| MLMm - Lubbock Ready Mix | Lubbock | TX | — | ◇ UNVERIFIED |
| MOMm - Orange Rm | Orange | TX | — | ◇ UNVERIFIED |
| MPMm - Portable 910 - Dhl Warehouse Building C | Northlake | TX | — | ◇ UNVERIFIED |
| MPMm - Portable 915 Project Maverick | Cleburne | TX | — | ◇ UNVERIFIED |
| MMM & M Precast INC | North East | MD | — | ◇ UNVERIFIED |
| MMM & M Ready Mixed Concrete, INC. | Hixson | TN | — | ◇ UNVERIFIED |
| MPMobile Pre Mix-brighton | Brighton, 0.5 Mi Nw of | CO | — | ◇ UNVERIFIED |
| MPMobile Premix Conc.cn | Lone Tree | CO | — | ◇ UNVERIFIED |
| MPMobile Premix Concrete | Henderson | CO | — | ◇ UNVERIFIED |
| MPMobile Premix INC Permit 85lr150 | Fort Collins | CO | — | ◇ UNVERIFIED |
| MRMobile Regional Airport Concrete Batch Plant Location | Mobile | AL | — | ◇ UNVERIFIED |
| MCMobley Concrete Company | Harrisburg | AR | — | ◇ UNVERIFIED |
| MCMoca Concrete Poles INC. | Moca | PR | — | ◇ UNVERIFIED |
| MMocon | Fulton | MO | — | ◇ UNVERIFIED |
| MCMo Concrete | Greenville | IL | — | ◇ UNVERIFIED |
| MIMo-con Inc-millersburg | Fulton | MO | — | ◇ UNVERIFIED |
| MCModern Concrete | Elko | NV | — | ◇ UNVERIFIED |
| MCModern Concrete, INC. | Battle Mountain | NV | — | ◇ UNVERIFIED |
| MTModesto Thc INC | Modesto | CA | — | ◇ UNVERIFIED |
| MRMoeller Ready Mix INC | Meredosia | IL | — | ◇ UNVERIFIED |
| MRMoffat Ready Mix | Craig | CO | — | ◇ UNVERIFIED |
| MRMolalla Redi-mix & Rock Products INC | Molalla | OR | — | ◇ UNVERIFIED |
| MCMolin Concrete Products Company | Anoka | MN | — | ◇ UNVERIFIED |
| MPMonahans Plant | Monahans | TX | — | ◇ UNVERIFIED |
| MLMonierlifetile L L C | Boca Raton | FL | — | ◇ UNVERIFIED |
| MLMonierlifetile L L C | Kansas City | MO | — | ◇ UNVERIFIED |
| MLMonierlifetile LLC | San Bernardino | CA | — | ◇ UNVERIFIED |
| MRMonmouth Ready Mix CORP | Monmouth | IL | — | ◇ UNVERIFIED |
| MIMonroc INC 00146 | Saint Anthony | ID | — | ◇ UNVERIFIED |
| MCMonroe Concrete Products INC. | Key West | FL | — | ◇ UNVERIFIED |
| MGMonroe Graphics Portable Ready Mix | Monroe | LA | — | ◇ UNVERIFIED |
