| KGKen Garner Manufacturing | Chattanooga | TN | — | ◇ UNVERIFIED |
| KCKennedy Concrete | Vineland City | NJ | — | ◇ UNVERIFIED |
| KFKeystone Filler & Mfg/muncy Coal Prep Pl | Muncy | PA | — | ◇ UNVERIFIED |
| KMKimble Manufacturing Company | New Philadelphia | OH | — | ◇ UNVERIFIED |
| KAKincheloe and Sons | Myrtle Point | OR | — | ◇ UNVERIFIED |
| KEKing's Excavating | Canton | OH | — | ◇ UNVERIFIED |
 Klein Products of Texas | Jacksonville | TX | — | ◇ UNVERIFIED |
| KCKobelco Construction Machinery USA INC | Moore | SC | — | ◇ UNVERIFIED |
| KAKomatsu America CORP. | Lexington | KY | — | ◇ UNVERIFIED |
| KFKomatsu Forest LLC | Shawano | WI | — | ◇ UNVERIFIED |
| KCKomorowski Construction Company | West Chester | PA | — | ◇ UNVERIFIED |
| KEKooistra Excavating LLC - Forkston Twp, Pa | Dushore | PA | — | ◇ UNVERIFIED |
| KTKubota Tractor Corporation Western Division | Lodi | CA | — | ◇ UNVERIFIED |
| KQKutztown Quarry | Kutztown | PA | — | ◇ UNVERIFIED |
| KCKw Construction | Paso Robles | CA | — | ◇ UNVERIFIED |
| KMKyanite Mining Corporation - Dillwyn Mullite Plant | Dillwyn | VA | — | ◇ UNVERIFIED |
| LCLafarge CORP Duquesne_plant | Pittsburgh | PA | — | ◇ UNVERIFIED |
| LNLafarge North America-mineral Solutions | Eagan | MN | — | ◇ UNVERIFIED |
| LCLaguna Clay CO | City of Industry | CA | — | ◇ UNVERIFIED |
| LSLand Shaper Inc, Main Facility | Gulfport | MS | — | ◇ UNVERIFIED |
| LMLaney Materials LLC - Laney Recycling and Aggregates | Laurel | MD | — | ◇ UNVERIFIED |
| LCLash Const. (5 S. Calle Cesar Chavez ) | Santa Barbara | CA | — | ◇ UNVERIFIED |
| LCLash Construction | Santa Barbara | CA | — | ◇ UNVERIFIED |
| LVLash/screen - Various Locations | Santa Barbara | CA | — | ◇ UNVERIFIED |
| LILavalley Industries LLC | Bemidji | MN | — | ◇ UNVERIFIED |
| LCLawrence's Contractor, INC. | Springfield Gardens | NY | — | ◇ UNVERIFIED |
| LLLbc Logistics Solutions, INC. | Plantation | FL | — | ◇ UNVERIFIED |
| LJLeaning Juniper Wind Power Facility | Arlington | OR | — | ◇ UNVERIFIED |
| LSLegacy Systems INC | Fremont | CA | — | ◇ UNVERIFIED |
| LCLehigh Cement CO | Woodsboro | MD | — | ◇ UNVERIFIED |
| LGLeRoy Group, LLC | Ottawa | KS | — | ◇ UNVERIFIED |
| LRLetohatchee Rail | Letohatchee | AL | — | ◇ UNVERIFIED |
| LELevy Environmental Services Company | Delta | OH | — | ◇ UNVERIFIED |
| LLLevy Lexington | Lexington | NC | — | ◇ UNVERIFIED |
| LNLhoist North America of Tn, LLC Dba Spinks Clay Company, INC. Dba Tyson Plant | Paris | TN | — | ◇ UNVERIFIED |
| LILiebherr-america INC | Newport News | VA | — | ◇ UNVERIFIED |
| LCLincoln Contr & Equip Co/boswell | Stoystown | PA | — | ◇ UNVERIFIED |
| LSLone Star Industries INC Dba Buzzi Unicem USA - New Orleans Cement Terminal | New Orleans | LA | — | ◇ UNVERIFIED |
| LBLoren Bentley | Cabool | MO | — | ◇ UNVERIFIED |
| LTLuckys Trailer Sales INC | Colchester | VT | — | ◇ UNVERIFIED |
| LLLwfp LLC Dba Trinity Esc | Frazier Park | CA | — | ◇ UNVERIFIED |
| MCMacarthur Company | Sumner | WA | — | ◇ UNVERIFIED |
| MMMack Mfg INC | Theodore | AL | — | ◇ UNVERIFIED |
| MEMaguire Equipment INC | Hyde Park | MA | — | ◇ UNVERIFIED |
| MNManitou North America LLC | West Bend | WI | — | ◇ UNVERIFIED |
| MRManitowac Remanufacturing, INC. | Bauxite | AR | — | ◇ UNVERIFIED |
| MCManitowoc Cranes | Port Washington | WI | — | ◇ UNVERIFIED |
| MMMarlee MFG, Inc | Rochester | NY | — | ◇ UNVERIFIED |
| MMMartin Marietta Materials, INC. - Wilson Quarry | Wilson | NC | — | ◇ UNVERIFIED |
| MMMartin Marietta:rock Hill | Rock Hill | SC | — | ◇ UNVERIFIED |
