| LMLucas Milhaupt INC | Cudahy | WI | — | ◇ UNVERIFIED |
| MIMacdermid INC | Ferndale | MI | — | ◇ UNVERIFIED |
| MRManassas Ready Mix Concrete | Manassas | VA | — | ◇ UNVERIFIED |
| MMMartin Marietta - 2401 Picadilly Rd | Aurora | CO | — | ◇ UNVERIFIED |
| MMMartin Marietta Chambers Ready Mix | Aurora | CO | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete Company INC | Lake Park | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete - Fort Pierce Plant | Fort Pierce | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete - Stuart Plant | Stuart | FL | — | ◇ UNVERIFIED |
| MDMasonite Door CORP | Pittsburg | KS | — | ◇ UNVERIFIED |
| MLMassarelli's Lawn Ornaments, INC. | Hammonton | NJ | — | ◇ UNVERIFIED |
| MCMasters CO INC. | Wood Dale | IL | — | ◇ UNVERIFIED |
| MSMccabe Sand & Gravel | Taunton | MA | — | ◇ UNVERIFIED |
| MCMetal Chem INC | Greenville | SC | — | ◇ UNVERIFIED |
| MCMetro Concrete | Ocean Springs | MS | — | ◇ UNVERIFIED |
| MMMetro Materials INC Cordova | Cordova | TN | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation - Hamlet Plant | Hamlet | NC | — | ◇ UNVERIFIED |
| MPMetromont Paris Mountain | Greenville | SC | — | ◇ UNVERIFIED |
| MCMid Continent Concrete CO / 431 W 23rd St Tulsa Facility | Tulsa | OK | — | ◇ 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 |
| MLM-i LLC | Broussard | LA | — | ◇ UNVERIFIED |
| MPMineral Processing (0388000025) | Crawford Twp. | OH | — | ◇ UNVERIFIED |
 Mmc Materials INC | Hattiesburg | MS | — | ◇ UNVERIFIED |
| Mmc Materials INC | Coldwater | MS | — | ◇ UNVERIFIED |
| Mmc Materials Inc, Ellisville | Ellisville | MS | — | ◇ UNVERIFIED |
| Mmc Materials, INC. - Rossville Plant | Rossville | TN | — | ◇ UNVERIFIED |
| Mmc Materials, INC - South Parkway Plant | Memphis | TN | — | ◇ UNVERIFIED |
| Mmc Materials Inc, Starkville 30854 | Starkville | MS | — | ◇ UNVERIFIED |
| MSMobile Solvent & Supply | Eight Mile | AL | — | ◇ UNVERIFIED |
| MBMoore Batch Plant | Moore | OK | — | ◇ UNVERIFIED |
| MCMorgan Concrete CO. - Lavonia | Lavonia | GA | — | ◇ UNVERIFIED |
| MCMorgan Concrete Company | Westminster | SC | — | ◇ UNVERIFIED |
| MCMorgan Concrete CO. - Rabun Gap | Rabun Gap | GA | — | ◇ UNVERIFIED |
| MCMorgan Concrete - Demorest Plant | Demorest | GA | — | ◇ UNVERIFIED |
| MGMulti-chem Group | Sonora | TX | — | ◇ UNVERIFIED |
| MGMulti-chem Group Roosevelt Ut Facility | Roosevelt | UT | — | ◇ UNVERIFIED |
| MGMulti-chem Group Three Rivers Facility | Three Rivers | TX | — | ◇ UNVERIFIED |
| MPMykawa Plant | Houston | TX | — | ◇ UNVERIFIED |
| NRNational Ready Mix Concrete | Moorpark | CA | — | ◇ UNVERIFIED |
| NRNational Ready Mix Concrete CO | Los Angeles | CA | — | ◇ UNVERIFIED |
| NRNational Ready Mix Concrete CO . | Sun Valley | CA | — | ◇ UNVERIFIED |
| NRNevada Ready Mix | Las Vegas | NV | — | ◇ UNVERIFIED |
| NENew England Concrete Products | Amesbury | MA | — | ◇ UNVERIFIED |
| NCNewington Concrete Corporation - Gainesville Plant | Gainesville | VA | — | ◇ UNVERIFIED |
| NNNew Ngc INC. D/b/a National Gypsum Compa | Clinton | IN | — | ◇ UNVERIFIED |
| NMNof Metal Coatings North America INC | Chardon | OH | — | ◇ UNVERIFIED |
| NFNorman Fox & CO | Industry | CA | — | ◇ UNVERIFIED |
| NNorthfield-indianapolis | Indianapolis | IN | — | ◇ UNVERIFIED |
| NINox-crete, INC. | Omaha | NE | — | ◇ UNVERIFIED |
| OAOldcastle Apg South | Pompano Beach | FL | — | ◇ UNVERIFIED |
| OAOldcastle Apg South, INC | Pensacola | FL | — | ◇ UNVERIFIED |
| OCOld Castle Infrastructure | Fuquay Varina | NC | — | ◇ UNVERIFIED |
| OIOldcastle Infrastructure | Topeka | KS | — | ◇ UNVERIFIED |
 Oldcastle Infrastructure INC. | Fredericksburg | VA | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC | North Fort Myers | FL | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC - Concord | Concord | NC | — | ◇ UNVERIFIED |
| OPOldcastle Precast Telco | Newnan | GA | — | ◇ UNVERIFIED |
| OROldcastle Retail INC | Oxford | MA | — | ◇ UNVERIFIED |
| OROldcastle Retail INC (dba Bonsal American) | Canaan | CT | — | ◇ UNVERIFIED |
| OEOmg Electronic Chemicals INC | Maple Plain | MN | — | ◇ UNVERIFIED |
| OCOwatonna Construction CO - Masonry | Medford | MN | — | ◇ UNVERIFIED |
| OSOxford Sand Company Inc, Oxford Plant | Oxford | MS | — | ◇ UNVERIFIED |
| OBOzinga Brothers Ready Mix Concrete | Crown Point | IN | — | ◇ UNVERIFIED |
| OCOzinga Chicago Rmc INC | Chicago | IL | — | ◇ UNVERIFIED |
| OCOzinga Concrete Products | Sycamore | IL | — | ◇ UNVERIFIED |
| OIOzinga Illinois Rmc INC | Plainfield | IL | — | ◇ UNVERIFIED |
| OIOzinga Illinois Rmc INC | Montgomery | IL | — | ◇ UNVERIFIED |
| OIOzinga Illinois Rmc INC | Lemont | IL | — | ◇ UNVERIFIED |
| OIOzinga Illinois Rmc INC | Alsip | IL | — | ◇ UNVERIFIED |
| OIOzinga Illinois Rmc INC | Joliet | IL | — | ◇ UNVERIFIED |
| OROzinga Ready Mix Company | Chicago | IL | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Concrete - Chinatown | Chicago | IL | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Concrete Desplaines Yard | Des Plaines | IL | — | ◇ UNVERIFIED |
| OROzinga Ready-mix Concrete - Evanston Yard | Evanston | IL | — | ◇ UNVERIFIED |
| OROzinga Ready Mix Concrete INC | Lake Bluff | IL | — | ◇ UNVERIFIED |
| PCParamelt CORP | Rosemead | CA | — | ◇ UNVERIFIED |
| PSPeak Silverthorne Batch Plant | Silverthorne | CO | — | ◇ UNVERIFIED |
| PCPenny's Concrete, INC. | Kansas City | MO | — | ◇ UNVERIFIED |
| PCPenny's Concrete - Martin City | Kansas City | MO | — | ◇ UNVERIFIED |
| PBPiedmont Batch Plant | Piedmont | OK | — | ◇ UNVERIFIED |
| PCPioneer Concrete of Texas INC | Round Rock | TX | — | ◇ UNVERIFIED |
| PIPlating International INC | Franklin Park | IL | — | ◇ UNVERIFIED |
| PIPolychemie INC. - Wayne, Mi | Wayne | MI | — | ◇ UNVERIFIED |
| PEPpg Euclid Pretreatment & Specialty Prods | Euclid | OH | — | ◇ UNVERIFIED |
| PMPrairie Material Sales INC | Northbrook | IL | — | ◇ UNVERIFIED |
| PPPrecision Packaging | Fort Smith | AR | — | ◇ UNVERIFIED |
| PCPreferred Concrete CORP | Freetown | MA | — | ◇ UNVERIFIED |
| PMPreferred Materials Alico Road | Fort Myers | FL | — | ◇ UNVERIFIED |
| PMPreferred Materials-east Orlando Cbp | Orlando | FL | — | ◇ UNVERIFIED |
| PMPreferred Materials INC | Bonita Springs | FL | — | ◇ UNVERIFIED |
| PMPreferred Materials, INC. | Naples | FL | — | ◇ UNVERIFIED |
| PWProchem Water LLC | Elliston | VA | — | ◇ UNVERIFIED |
| PPProsper Plant | Prosper | TX | — | ◇ UNVERIFIED |
 Ques Industries INC | Cleveland | OH | — | ◇ UNVERIFIED |
| QRQuikrete Ready Mix - Phenix City Plant | Phenix City | AL | — | ◇ UNVERIFIED |
| RCRainbow Concrete CO / Rainbow Concrete | Tulsa | OK | — | ◇ UNVERIFIED |
| RCRalph Clayton & Sons | Allentown | NJ | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete - Bellevue Plant | Bellevue | NE | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete CO | Omaha | NE | — | ◇ UNVERIFIED |
