| LWLafarge West, Inc.- Drennan Concrete Pla | Colorado Springs | CO | — | ◇ UNVERIFIED |
| LSLake Shore Burial Vault Co., INC. | Brookfield | WI | — | ◇ UNVERIFIED |
| LCLand Clearing Keystone Investments Iii | Jacksonville | FL | — | ◇ UNVERIFIED |
| LSLandmark Stone Inc | Olivehurst | CA | — | ◇ UNVERIFIED |
| LSLandmark Stone Products, LLC | Cynthiana | KY | — | ◇ UNVERIFIED |
| LSLan Se, LLC Dba Gate Precast Company | Ashland City | TN | — | ◇ UNVERIFIED |
| LSLan Se, LLC Dba Gate Precast-jacksonville, Fl | Jacksonville | FL | — | ◇ UNVERIFIED |
| LSLan Se, LLC Dba Gate Precast-kissimmee, Fl | Kissimmee | FL | — | ◇ UNVERIFIED |
| LCLargo Concrete | San Jose | CA | — | ◇ UNVERIFIED |
| LELarry E. Knight, INC. | Glyndon | MD | — | ◇ UNVERIFIED |
| LJLarry Jacinto Construction, INC. | Redlands | CA | — | ◇ UNVERIFIED |
| LFL.b. Foster Company | Tucson | AZ | — | ◇ UNVERIFIED |
| LILeco Industries | Las Cruces | NM | — | ◇ UNVERIFIED |
| LPLedgeview Precast Concrete INC. | Fond Du Lac | WI | — | ◇ UNVERIFIED |
| LFLee Farms Excavating INC | Paxton | IL | — | ◇ UNVERIFIED |
| LPLees Precast Concrete Inc. | Aberdeen | MS | — | ◇ UNVERIFIED |
| LCLehigh Cement CO | Portland | OR | — | ◇ UNVERIFIED |
| LSLehigh Southwest Cement Company | Fresno | CA | — | ◇ UNVERIFIED |
| LCLesney Concrete Specialist | Tarentum | PA | — | ◇ UNVERIFIED |
| LEL. E. Weed & Son, LLC | White River Junction | VT | — | ◇ UNVERIFIED |
| LMLewis Memorial Christian Village | Springfield | IL | — | ◇ UNVERIFIED |
| LFLiberty Family Partnership | San Diego | CA | — | ◇ UNVERIFIED |
| LCLiebus Concrete, Inc. | Oskaloosa | IA | — | ◇ UNVERIFIED |
| LCLiebus Concrete, Inc. | Oskaloosa | IA | — | ◇ UNVERIFIED |
| LILift INC. | Andover | KS | — | ◇ UNVERIFIED |
| LILimaco, INC. | Lenexa | KS | — | ◇ UNVERIFIED |
| LPLindsay Precast, INC. | Colorado Springs | CO | — | ◇ UNVERIFIED |
| LTLindsay Transportation Solutions | Rio Vista | CA | — | ◇ UNVERIFIED |
| LCLivingston Concrete Services ( | Lincoln | CA | — | ◇ UNVERIFIED |
| LSLone Star Pipe, LLC | Florence | TX | — | ◇ UNVERIFIED |
| LSLone Star Precast | Buda | TX | — | ◇ UNVERIFIED |
| LPLonestar Prestress Mfg. INC. | Conway | AR | — | ◇ UNVERIFIED |
| LWLone Wolf Enterprises-lone Wolf Enterprises | Kansas City | MO | — | ◇ UNVERIFIED |
| LPLongleaf Packaging | Holly Hill | SC | — | ◇ UNVERIFIED |
| LCLotts Concrete Products, INC. | Fort Myers | FL | — | ◇ UNVERIFIED |
| LCLudlow Companies, LLC | Nampa | ID | — | ◇ UNVERIFIED |
| MCMack Concrete Industries, INC. | Salt Springs | FL | — | ◇ UNVERIFIED |
 Mack Industries INC | White Lake | MI | — | ◇ UNVERIFIED |
| MCMacon Concrete Products INC | San Antonio | TX | — | ◇ UNVERIFIED |
| MLManafort-precision, LLC | Worcester | MA | — | ◇ UNVERIFIED |
| MLManafort-precision, LLC | Worcester | MA | — | ◇ UNVERIFIED |
| MBManhole Builders Incorporated | Corona | CA | — | ◇ UNVERIFIED |
| MSMarathon Staffing Services, INC. | Hudson | NH | — | ◇ UNVERIFIED |
| MSMarathon Staffing Services, INC. | Londonderry | NH | — | ◇ UNVERIFIED |
| MCMarlette Concrete Prod INC | Marlette | MI | — | ◇ UNVERIFIED |
| MCMarsich Crane, INC | Billings | MT | — | ◇ UNVERIFIED |
| MEMartin Enterprises | Kennedale | TX | — | ◇ UNVERIFIED |
| MEMartin Enterprises Dba Tj Composites | Nuevo | CA | — | ◇ UNVERIFIED |
| MCMaster Construction Products, INC. | Orlando | FL | — | ◇ UNVERIFIED |
| MHMasterstone Hardscapes LLC | Saint Peters | MO | — | ◇ UNVERIFIED |
