| ARAlabama Railcar Service | Ozark | AL | — | ◇ UNVERIFIED |
| ALA L Lee Corporation - Site B | Brushfork | WV | — | ◇ UNVERIFIED |
| AHAlstom - Hornell Car Shop | Hornell | NY | — | ◇ UNVERIFIED |
| ARAlta Ready Mix INC | Walnut Grove | CA | — | ◇ UNVERIFIED |
| AMAmerican Mine Door | Cleveland | OH | — | ◇ UNVERIFIED |
| ARAmerican Railcar Industries | Marmaduke | AR | — | ◇ UNVERIFIED |
| ASAmrize South Central INC. | Cave in Rock | IL | — | ◇ UNVERIFIED |
| AIAmsted Industries Company, INC. | Bessemer | AL | — | ◇ UNVERIFIED |
| ARAmsted Rail Company, INC. | Bessemer | AL | — | ◇ UNVERIFIED |
| AEAmtech Elevator Services | Cerritos | CA | — | ◇ UNVERIFIED |
| AIAndersons INC the - Danville Rail | Danville | IL | — | ◇ UNVERIFIED |
| AIAnsaldobreda, INC. | Dansville | NY | — | ◇ UNVERIFIED |
| ABApex Bulk Commodities INC | American Canyon | CA | — | ◇ UNVERIFIED |
| AMAppalachian Mine Supplies | Pounding Mill | VA | — | ◇ UNVERIFIED |
| ATAppalachian Tank Car Services, INC. | Elk Mills | MD | — | ◇ UNVERIFIED |
| AIArcosa INC | Clinton | IL | — | ◇ UNVERIFIED |
| ASA. Stucki Company Incorporated | Sharon | PA | — | ◇ UNVERIFIED |
| ADA.stucki Dba Wheelworx | Calera | AL | — | ◇ UNVERIFIED |
| ACAtlas Copco - Commerce City Cust Center | Commerce City | CO | — | ◇ UNVERIFIED |
| ACAtlas Copco Secoroc LLC | Roanoke | VA | — | ◇ UNVERIFIED |
| APAu Precision Equipment LLC | Clarksville | TN | — | ◇ UNVERIFIED |
| AWAuxier Welding INC | Belva | WV | — | ◇ UNVERIFIED |
| AAAvangrid at Lmc Industrial Contractors INC | Dansville | NY | — | ◇ UNVERIFIED |
| BCBach Composite Colorado, INC | Fort Lupton | CO | — | ◇ UNVERIFIED |
| BBBaker Bellfield LLC | Sacramento | CA | — | ◇ UNVERIFIED |
| BHBaker Hughes Mining Tools INC | Grand Prairie | TX | — | ◇ UNVERIFIED |
| BPBarrett Paving - Moraine Asphalt | Moraine | OH | — | ◇ UNVERIFIED |
| BSBay Shore Systems Incorporated | Benicia | CA | — | ◇ UNVERIFIED |
| BIBc Installation Company | Paramount | CA | — | ◇ UNVERIFIED |
| BDB & D Industrial & Mining Services, INC. | Jasper | AL | — | ◇ UNVERIFIED |
| BCBejac Corporation | Richmond | CA | — | ◇ UNVERIFIED |
| BCBenchmark Civil Construction INC | Napa | CA | — | ◇ UNVERIFIED |
| BBendetti | Colton | CA | — | ◇ UNVERIFIED |
| BRBirmingham Rail & Locomotive Co., INC. | Bessemer | AL | — | ◇ UNVERIFIED |
| BBBob Baker Trucking | Gualala | CA | — | ◇ UNVERIFIED |
| BBombardier | Orlando | FL | — | ◇ UNVERIFIED |
| BTBombardier Transportation Hold | Pittsburg | CA | — | ◇ UNVERIFIED |
| BTBombardier Transportation (holdings) USA INC. | Pittsburgh | PA | — | ◇ UNVERIFIED |
| BCBond Crushed Concrete | Bangor Twp | MI | — | ◇ UNVERIFIED |
| BTBond Trucking INC | Bay City | MI | — | ◇ UNVERIFIED |
| BFBoyd Fabrication and Repair | Mount Sterling | KY | — | ◇ UNVERIFIED |
| BMBrad Malley Well Drilling INC | Mount Pleasant | MI | — | ◇ UNVERIFIED |
| BSBrake Supply | Princeton | WV | — | ◇ UNVERIFIED |
| BSBrannan Sand and Gravel - Port Screen | Denver | CO | — | ◇ UNVERIFIED |
| BTBreda Transportation INC | Littleton | MA | — | ◇ UNVERIFIED |
| BEBrent Engineering | Elsinore | CA | — | ◇ UNVERIFIED |
| BEBrent Engineering INC | Menifee | CA | — | ◇ UNVERIFIED |
| BUBrevini USA (dana) | Slidell | LA | — | ◇ UNVERIFIED |
| BABrogans Auto Repair | Charleston | WV | — | ◇ UNVERIFIED |
 Brookville Equipment Corporation | Brookville | PA | — | ◇ UNVERIFIED |
| BABucyrus America INC | Pearisburg | VA | — | ◇ UNVERIFIED |
| BBBuilder's Best INC | Jacksonville | FL | — | ◇ UNVERIFIED |
| BMBurrell Mining International | Waynesburg | PA | — | ◇ UNVERIFIED |
| BWB W Services | Washington | IN | — | ◇ UNVERIFIED |
| CECal Electro INC | Redding | CA | — | ◇ UNVERIFIED |
| CPCalifornia Push Technologies | San Leandro | CA | — | ◇ UNVERIFIED |
| CUCatco USA LLC | Terrell | TX | — | ◇ UNVERIFIED |
| CCaterpillar (cat) | Gillette | WY | — | ◇ UNVERIFIED |
| CGCaterpillar Global Mining Amer Llc/houston | Houston | PA | — | ◇ UNVERIFIED |
| CGCaterpillar Global Mining - Highwall Miners LLC | Beckley | WV | — | ◇ UNVERIFIED |
| CGCaterpillar Global Mining LLC | Carrier Mills | IL | — | ◇ UNVERIFIED |
| CGCaterpillar Global Mining Virginia LLC | Tazewell | VA | — | ◇ UNVERIFIED |
| CRCathcart Repair Facilities, LLC | Elk Mills | MD | — | ◇ UNVERIFIED |
| CGCaylor & Genz Earthmovers, INC. | Goshen | WY | — | ◇ UNVERIFIED |
| CMC&c Manufacturing CORP Dba C&c Engineering | Meridian | CA | — | ◇ UNVERIFIED |
| CMC-e Minerals Plant 6 | Andersonville | GA | — | ◇ UNVERIFIED |
| CRCenter Rock INC. | Rockaway | NJ | — | ◇ UNVERIFIED |
| CRCf Rail Services LLC | East Chicago | IN | — | ◇ UNVERIFIED |
 Chembio Shelter, INC. | Sophia | WV | — | ◇ UNVERIFIED |
| CRChemetron Railway Products | Pueblo | CO | — | ◇ UNVERIFIED |
| CRChemetron Railway Products INC. | Steelton | PA | — | ◇ UNVERIFIED |
| CECherenzia Excavation, INC. | Westerly | RI | — | ◇ UNVERIFIED |
| CHChicago Heights Railcar INC | Chicago Heights | IL | — | ◇ UNVERIFIED |
| CLChicago Locomotive Services LLC | Joliet | IL | — | ◇ UNVERIFIED |
| CCinao | Cincinnati | OH | — | ◇ UNVERIFIED |
| CSClear Spgs Ranch Pit 2 - Port Screen | Fountain | CO | — | ◇ UNVERIFIED |
| CEClover Equipment LLC | Anaheim | CA | — | ◇ UNVERIFIED |
| CACoal Auger Pro | Carrollton | OH | — | ◇ UNVERIFIED |
| CTCoal Technology LLC | Nora | VA | — | ◇ UNVERIFIED |
| CECoastline Equipment | Long Beach | CA | — | ◇ UNVERIFIED |
| CSCoffman Specialties INC | Cabazon | CA | — | ◇ UNVERIFIED |
| CMCogar Manufacturing | Bolt | WV | — | ◇ UNVERIFIED |
| CWColorado West Construction | Murrieta | CA | — | ◇ UNVERIFIED |
| CBColton Bit LLC | Grafton | WV | — | ◇ UNVERIFIED |
| CNCreations N' Chrome | Santa Clarita | CA | — | ◇ UNVERIFIED |
| CECreative Engineering Consultants Corporation | Little Rock | AR | — | ◇ UNVERIFIED |
| CSCrowder Supply Co LLC | Commerce City | CO | — | ◇ UNVERIFIED |
| CPCrown Parts & Machine | Billings | MT | — | ◇ UNVERIFIED |
| CICrush-it, INC. | Jonesboro | GA | — | ◇ UNVERIFIED |
| CRCsx Railroad | Marion (historical) | OH | — | ◇ UNVERIFIED |
| CTCsx Transportation | Nashville | TN | — | ◇ UNVERIFIED |
| CTCsx Transportation | Nashville | TN | — | ◇ UNVERIFIED |
| CTCsx Transportation Bryan Park Work Equipment Shop | Richmond | VA | — | ◇ UNVERIFIED |
| CRCurry Rail Services | Hollidaysburg | PA | — | ◇ UNVERIFIED |
| CRCurry Rail Services INC. | Hollidaysburg | PA | — | ◇ UNVERIFIED |
| CCCushion Cut INC | Sun Valley | CA | — | ◇ UNVERIFIED |
| CFCzm Foundation Equipment | Ventura | CA | — | ◇ UNVERIFIED |
| CFCzm Foundation Equipment | Ellabell | GA | — | ◇ UNVERIFIED |
| DMDa Mccosker Const Dba Independent Const CO | North Highlands | CA | — | ◇ UNVERIFIED |
| DMD.a. Mccosker Construction | Valencia | CA | — | ◇ UNVERIFIED |
