| 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 |
| MEMaster Excavators, INC. | Pompano Beach | FL | — | ◇ UNVERIFIED |
 Material Handling Systems, INC. | Middletown | CT | — | ◇ UNVERIFIED |
| MCMaxim Crane Works, LP | Beaumont | TX | — | ◇ UNVERIFIED |
| MBMayhew Bestway LLC | Ormond Beach | FL | — | ◇ UNVERIFIED |
 M-b Companies INC | Salem | OR | — | ◇ UNVERIFIED |
| MIMbw INC. | Slinger | WI | — | ◇ UNVERIFIED |
| MCMcdonough Construction Rentals INC | Tampa | FL | — | ◇ UNVERIFIED |
| MAMcelroy and Wilken | Kalispell | MT | — | ◇ UNVERIFIED |
| MTMcneilus Truck - Manufacturing INC | Dodge Center | MN | — | ◇ UNVERIFIED |
| MTMcneilus Truck & Mfg INC | Villa Rica | GA | — | ◇ UNVERIFIED |
| MLMed-Co L.L.C. | Federal Way | WA | — | ◇ UNVERIFIED |
| MCMellott Co/cedar Hill Quarry | Peach Bottom | PA | — | ◇ UNVERIFIED |
| MCMellott Co/warfordsburg Mfg Fac | Warfordsburg | PA | — | ◇ UNVERIFIED |
| MGMesa General Engineering INC | Castaic | CA | — | ◇ UNVERIFIED |
| MGMesa General Engineering INC | Corona | CA | — | ◇ UNVERIFIED |
| MSMetal Services LLC | Ghent | KY | — | ◇ UNVERIFIED |
| MSMetal Services LLC (phoenix Global) | Ghent | KY | — | ◇ UNVERIFIED |
| MUMetcan USA | Adrian | MI | — | ◇ UNVERIFIED |
| MCMetzger Construction Company INC | Boonville | IN | — | ◇ UNVERIFIED |
| MCMeuth Construction Supply INC | Morganfield | KY | — | ◇ UNVERIFIED |
| MPMeyer Products LLC (1318001982) | Cleveland | OH | — | ◇ UNVERIFIED |
| MRMichael Runk, Pamela Runk, Duane Runk Excavating | Broad Top | PA | — | ◇ UNVERIFIED |
 M.i.c. Industries, INC. | Winchester | VA | — | ◇ UNVERIFIED |
| MBMicro-lite - Buffalo (handling Facility) | Buffalo | KS | — | ◇ UNVERIFIED |
| MLMicro-lite, L.l.c. | Buffalo | KS | — | ◇ UNVERIFIED |
| MUMicronized Ultra Tech INC | Richmond | CA | — | ◇ UNVERIFIED |
| MAMid America Trenchers LLC | Dexter | IA | — | ◇ UNVERIFIED |
| MPMidwest Perlite Company, Inc. | Appleton | WI | — | ◇ UNVERIFIED |
| MLM-i LLC - Amelia Grinding & Bulk Storage Facility | Amelia | LA | — | ◇ UNVERIFIED |
| MTMiller Trucking & Excavating | Carbon Cliff | IL | — | ◇ UNVERIFIED |
| MQMillville Quarry | Baltimore | MD | — | ◇ UNVERIFIED |
| MSMi Swaco Greystone Barite Mine | Battle Mountain | NV | — | ◇ UNVERIFIED |
 Mmc Materials INC | Memphis | TN | — | ◇ UNVERIFIED |
| MWMountain West Crushing Plant | Natrona | WY | — | ◇ UNVERIFIED |
| MCMrl Constructors of N.y., INC. | Niagara Falls | NY | — | ◇ UNVERIFIED |
| MJMud Jack King | Kansas City | MO | — | ◇ UNVERIFIED |
| MMultiserv | Birmingham | AL | — | ◇ UNVERIFIED |
| M1Multiserv/plt 18 Steelton | Steelton | PA | — | ◇ UNVERIFIED |
| MKMurray Keystone Processing Inc/keystone Cleaning Plt | Indiana | PA | — | ◇ UNVERIFIED |
| MLMurray Lane Trust | Athol | MA | — | ◇ UNVERIFIED |
| NLNanocor LLC | Aberdeen | MS | — | ◇ UNVERIFIED |
| NMNc Machinery Company | Anchorage | AK | — | ◇ UNVERIFIED |
| NENeroco Engineering | Oconto | WI | — | ◇ UNVERIFIED |
| NSNevada Slag, INC | Mcgill | NV | — | ◇ UNVERIFIED |
| NWNevada Water Trucks | Las Vegas | NV | — | ◇ UNVERIFIED |
| NENew Enterprise Stone & Lime CO Inc/fairfield | Cumberland | PA | — | ◇ UNVERIFIED |
| NLNext Level Construction Services | Temecula | CA | — | ◇ UNVERIFIED |
| NCNichols Concrete Holdings, LLC - Pelham Plant | Pelham | AL | — | ◇ UNVERIFIED |
| NCNoble Construction Equipment INC | Lubbock | TX | — | ◇ UNVERIFIED |
| NPNorcal Perlite, Inc. | Bakersfield | CA | — | ◇ UNVERIFIED |
