| LMLattimore Materials CORP - Denton | Denton | TX | — | ◇ UNVERIFIED |
| LMLattimore Materials CORP - Lewisville Rm | Lewisville | TX | — | ◇ UNVERIFIED |
| LMLattimore Materials CORP - Melissa Rm | Melissa | TX | — | ◇ UNVERIFIED |
| LMLattimore Materials CORP - Plano Rm | Plano | TX | — | ◇ UNVERIFIED |
| LMLattimore Materials CORP - Roanoke Rm | Roanoke | TX | — | ◇ UNVERIFIED |
| LMLattimore Materials CORP - Rockwall Rm | Rockwall | TX | — | ◇ UNVERIFIED |
| LMLattimore Materials CORP - Royse City Rmx | Royse City | TX | — | ◇ UNVERIFIED |
| LMLattimore Materials CORP - Wylie Rm | Lavon | TX | — | ◇ UNVERIFIED |
| LMLattimore Materials South Dallas Rmx | Dallas | TX | — | ◇ UNVERIFIED |
| LRLaurie Ready-mix | Laurie | MO | — | ◇ UNVERIFIED |
| L1Lavergne-plant 14 | La Vergne | TN | — | ◇ UNVERIFIED |
| LVLawrenceburg Vault Company | Lawrenceburg | TN | — | ◇ UNVERIFIED |
| LRLawrence-lynch Realty CORP | Falmouth | MA | — | ◇ UNVERIFIED |
| LCLawson Construction - 22-906 | Loveland | CO | — | ◇ UNVERIFIED |
| LRLawson Redi-mix INC | Nashville | TN | — | ◇ UNVERIFIED |
| LCLee's Concrete | Bangor | ME | — | ◇ UNVERIFIED |
| LSLee's Summit Municipal Airport | Lees Summit | MO | — | ◇ UNVERIFIED |
| LGLe Grand Johnson Construction Logan Shop | Logan | UT | — | ◇ UNVERIFIED |
| LCLemay Concrete Block-lemay Concrete Block | Saint Louis | MO | — | ◇ UNVERIFIED |
 Leo O'laughlin Inc-macon | Macon | MO | — | ◇ UNVERIFIED |
| Leo O'laughlin Inc-marceline | Marceline | MO | — | ◇ UNVERIFIED |
| LPLewisville Plant | Lewisville | TX | — | ◇ UNVERIFIED |
| LIL&g Industries 2326 Wolf Ridge Rd | Whistler | AL | — | ◇ UNVERIFIED |
| LHLiberty Holdings | Grimes | IA | — | ◇ UNVERIFIED |
| LRLiberty Ready Mix - Grimes | Grimes | IA | — | ◇ UNVERIFIED |
| LRLiberty Ready Mix INC | Jamaica | NY | — | ◇ UNVERIFIED |
| LRLiberty Ready Mix - Van Meter Facility | Van Meter | IA | — | ◇ UNVERIFIED |
| LQLimestone Quarry Plant | Madison | AL | — | ◇ UNVERIFIED |
| LCLincoln County Ready Mix | Stanford | KY | — | ◇ UNVERIFIED |
| LCLincoln County Ready Mix INC | Danville | KY | — | ◇ UNVERIFIED |
| LCLincolnland Concrete INC | New Berlin | IL | — | ◇ UNVERIFIED |
| LCLincolnland Concrete INC | Springfield | IL | — | ◇ UNVERIFIED |
| LRLittle Rock Wilbert Burial Vault CO. | Alexander | AR | — | ◇ UNVERIFIED |
| LRLivingston Ready Mix, LLC | Livingston | TN | — | ◇ UNVERIFIED |
| LCLivingston's Concrete Service INC | Olivehurst | CA | — | ◇ UNVERIFIED |
| LJL & J Asphalt - London | London | KY | — | ◇ UNVERIFIED |
| LPLj Properties of Wisconsin LLC | Milwaukee | WI | — | ◇ UNVERIFIED |
| LCLmp Concrete, INC. | Pink Hill | NC | — | ◇ UNVERIFIED |
| LCLn Concrete Materials Cor | Erlanger | KY | — | ◇ UNVERIFIED |
| LSLoch Sand and Construction Company | Maryville | MO | — | ◇ UNVERIFIED |
| LCLoflin Concrete CO. -- Pisgah Church Rd. | Kernersville | NC | — | ◇ UNVERIFIED |
| LSLone Star Concrete Harold Green Plant | Austin | TX | — | ◇ UNVERIFIED |
| LWLone Wolf Enterprises-lone Wolf Enterprises | Kansas City | MO | — | ◇ UNVERIFIED |
| LPLongleaf Packging | Vance | SC | — | ◇ UNVERIFIED |
| LALos Angeles Plant 15 | Los Angeles | CA | — | ◇ UNVERIFIED |
| LJLottie Jones Wilbert Production Facility | Lottie | LA | — | ◇ UNVERIFIED |
| LRLottman Ready Mix (portable) | Portable | KS | — | ◇ UNVERIFIED |
| LRLottman Ready Mix (portable)(air) | Edgerton | KS | — | ◇ UNVERIFIED |
| LRLoveland Ready Mix Concrete - Green Pit | Johnstown | CO | — | ◇ UNVERIFIED |
| LRLoveland Ready Mix Concrete INC | Johnstown Area | CO | — | ◇ UNVERIFIED |
| LCLower County Recycling CO | Erial | NJ | — | ◇ UNVERIFIED |
| LCLowes Concrete INC | Leitchfield | KY | — | ◇ UNVERIFIED |
| LCLowes Concrete Products INC - Ready Mix Plant | Leitchfield | KY | — | ◇ UNVERIFIED |
| LPL P G Ventures INC | Kearney | MO | — | ◇ UNVERIFIED |
| LCL&s Concrete | New Bedford | MA | — | ◇ UNVERIFIED |
| LCLtj Concrete, LLC - Weber Business Park | Dove Creek | CO | — | ◇ UNVERIFIED |
| LBLumberton Batch Plant Facility | Lumberton | TX | — | ◇ UNVERIFIED |
| LSLyman-richey Sand & Gravel 07 | Valley | NE | — | ◇ UNVERIFIED |
| LCLyons Concrete | Vidalia | GA | — | ◇ UNVERIFIED |
| MCMack Concrete | Grafton | OH | — | ◇ UNVERIFIED |
| MCMack Concrete, LLC | Mount Vernon | OH | — | ◇ UNVERIFIED |
| MFMaddens Facility | Caldwell | ID | — | ◇ UNVERIFIED |
| MRMaddens Ready Mix | Caldwell | ID | — | ◇ UNVERIFIED |
| MDMad Dog Concrete LLC | Rock Island | IL | — | ◇ UNVERIFIED |
| MRMadill Rmc Plant | Madill | OK | — | ◇ UNVERIFIED |
| MFMagnolia Field Facility | Pointe a La Hache | LA | — | ◇ UNVERIFIED |
| MRMagnolia Rmc Plant | Magnolia | TX | — | ◇ UNVERIFIED |
| MCMajor Concrete | Green Cove Springs | FL | — | ◇ UNVERIFIED |
| MCMalden Concrete Products | Malden | MO | — | ◇ UNVERIFIED |
| MRMallard Ready Mix, LLC - Clinton | Clinton | AR | — | ◇ UNVERIFIED |
| MBManassas Broad Run Ready Mix Concrete | Manassas | VA | — | ◇ UNVERIFIED |
| MManatts | Bondurant | IA | — | ◇ UNVERIFIED |
| MCManatts Concrete | Ankeny | IA | — | ◇ UNVERIFIED |
| MIManatts, INC. | Walford | IA | — | ◇ UNVERIFIED |
| MIManatt's INC - Huxley | Huxley | IA | — | ◇ UNVERIFIED |
| MIManatt's INC - Newton | Newton | IA | — | ◇ UNVERIFIED |
| MMMandan / Monarch Products / Ust | Mandan | ND | — | ◇ UNVERIFIED |
| MCManitou Concrete- Dolomite Products CO | Rochester | NY | — | ◇ UNVERIFIED |
| MCManor Concrete Enterprises, LLC Plant 1 | Hedgesville | WV | — | ◇ UNVERIFIED |
| MRMansfield Ready Mix | Venus | TX | — | ◇ UNVERIFIED |
| MAMarathon Ashland Petroleum LLC | Robinson | IL | — | ◇ UNVERIFIED |
| MPMar-con Products INC | San Marcos | CA | — | ◇ UNVERIFIED |
| MTMark Twain Redi-mix | Williamston | SC | — | ◇ UNVERIFIED |
| MTMark Twain Redi-mix INC. | Bloomsdale | MO | — | ◇ UNVERIFIED |
| MTMark Twain Redi Mix Plant | Horn Lake | MS | — | ◇ UNVERIFIED |
| MCMarshall Concrete Products INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| MEMartin Enterprises Dba Tj Composites | Nuevo | CA | — | ◇ UNVERIFIED |
| MMMartin Marietta - Del Camino Ready Mix | Longmont | CO | — | ◇ UNVERIFIED |
| MMMartin Marietta Materials INC - Fairborn | Medway | OH | — | ◇ UNVERIFIED |
| MMMartin Marietta Materials - Kirby | San Antonio | TX | — | ◇ UNVERIFIED |
| MMMartin Marietta Mat - Port Hmap & Gen | Colorado Springs | CO | — | ◇ UNVERIFIED |
| MMMartin Marietta Mtrls - Batch Plant | Estes Park | CO | — | ◇ UNVERIFIED |
| MMMartin Marietta Mtrls - Batch Plant | Littleton | CO | — | ◇ UNVERIFIED |
| MMMartin Marietta Rigden Ready Mix | Fort Collins | CO | — | ◇ UNVERIFIED |
| MCMartinsville Concrete Products INC | Martinsville | VA | — | ◇ UNVERIFIED |
| MRMarysville Ready Mix Co., INC. | Marysville | KS | — | ◇ UNVERIFIED |
| MMaschmeyer-apollo(blk/rm) | Apollo Beach | FL | — | ◇ UNVERIFIED |
| MBMaschmeyer - Brooksville | Brooksville | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Cbp - Melbourne | Melbourne | FL | — | ◇ UNVERIFIED |
| MCMaschmeyer Concrete Company - Apollo | Apollo Beach | FL | — | ◇ UNVERIFIED |
