| BCBoeing Company | Chicago | IL | — | ◇ UNVERIFIED |
| BCBoeing Company-3800 Lewiston Generator | Aurora | CO | — | ◇ UNVERIFIED |
| BDBoeing Defense Space & Security Wichita Div | Wichita | KS | — | ◇ UNVERIFIED |
| BEBoeing Everett Modification Center | Everett | WA | — | ◇ UNVERIFIED |
| BMBoeing Military Flight Center | Tukwila | WA | — | ◇ UNVERIFIED |
| BNBoeing North American Rocketdyne | Canoga Park | CA | — | ◇ UNVERIFIED |
| BSBoeing South Park | Seattle | WA | — | ◇ UNVERIFIED |
| BCBolton Concrete Products INC. | Johnson City | TN | — | ◇ UNVERIFIED |
| BRBoral Roofing LLC | Phoenix | AZ | — | ◇ UNVERIFIED |
| BMBordrin Motor Company | Oak Park | MI | — | ◇ UNVERIFIED |
| BBBoynton Beach Regional Turbine Center | Boynton Beach | FL | — | ◇ UNVERIFIED |
| BLBpi-westminster, Llc(owner)/arcadis (op) | Denver | CO | — | ◇ UNVERIFIED |
| BBBradbury Burial Vault CO INC | Gloucester Twp | NJ | — | ◇ UNVERIFIED |
| BTBradley Tank & Pipe, LLC | Mcdonald | TN | — | ◇ UNVERIFIED |
| BABrookley Aeroplex | Mobile | AL | — | ◇ UNVERIFIED |
| BIBrown-wilbert INC. - Jamestown | Jamestown | ND | — | ◇ UNVERIFIED |
| BVBrown-wilbert Vault CO. - De Pere | De Pere | WI | — | ◇ UNVERIFIED |
| BCBurnco Colorado - East Greeley Plant | Kersey | CO | — | ◇ UNVERIFIED |
| CACapital Aviation | Bethany | OK | — | ◇ UNVERIFIED |
| CCCapital Concrete Products | Del Valle | TX | — | ◇ UNVERIFIED |
| CCCarolina Cast Stone Company Incorporated | Greensboro | NC | — | ◇ UNVERIFIED |
| CCCascade Const- Alliance Ready Mix | Delta Area | CO | — | ◇ UNVERIFIED |
| CCCash Concrete Products Plant 1 | Greencastle | IN | — | ◇ UNVERIFIED |
| CFCecil Field | Jacksonville | FL | — | ◇ UNVERIFIED |
| CLCellxion LLC - Sabre Building Systems By Cellxion | Bossier City | LA | — | ◇ UNVERIFIED |
| CICenturion Investments Inc-avmats | Mascoutah | IL | — | ◇ UNVERIFIED |
| CSCga Stone Casting, LLC | West Palm Beach | FL | — | ◇ UNVERIFIED |
| CBChampaign Builders Supply CO | Champaign | IL | — | ◇ UNVERIFIED |
| CFChase Field Operations Center | Beeville | TX | — | ◇ UNVERIFIED |
| CPChase Precast Div of Oldcastle | North Brookfield | MA | — | ◇ UNVERIFIED |
| CVChilds Vault Company | Anderson | SC | — | ◇ UNVERIFIED |
| CVChristy Vault Company Tulare | Tulare | CA | — | ◇ UNVERIFIED |
| CBChromalloy Belac Lifex Center of Excellence | Oldsmar | FL | — | ◇ UNVERIFIED |
| CDChromalloy Dallas Plant 1 | Dallas | TX | — | ◇ UNVERIFIED |
| CDChromalloy Div Ok / 1720 National Blvd | Midwest City | OK | — | ◇ UNVERIFIED |
| CCicomposites | Oxnard | CA | — | ◇ UNVERIFIED |
| CACimarron Aircraft CORP / Airport Industrial Park | El Reno | OK | — | ◇ UNVERIFIED |
 Cirrus Design CORP Aka Cirrus Aircraft - Finishing Center | Hermantown | MN | — | ◇ UNVERIFIED |
| CDClarin Div of Greenwich Industries LP | Lake Bluff | IL | — | ◇ UNVERIFIED |
| CCClassic Cast | Freeport | FL | — | ◇ UNVERIFIED |
| CMClassic Marble CO | Nettie | WV | — | ◇ UNVERIFIED |
| CCClearwater, City of - Master Reuse System | Clearwater | FL | — | ◇ UNVERIFIED |
| CPCoastal Pit #1 | Gloucester | VA | — | ◇ UNVERIFIED |
| CECollins Engine Nozzles INC | West Des Moines | IA | — | ◇ UNVERIFIED |
| CPColumbia Precast, LLC | Columbia | TN | — | ◇ UNVERIFIED |
| CVCommercial Vehicle Group - Chillicothe | Chillicothe | OH | — | ◇ UNVERIFIED |
| CDConcrete Dakota Redi Mix INC. | Watertown | SD | — | ◇ UNVERIFIED |
| CNConcrete Norwest Getchell Pit | Lake Stevens | WA | — | ◇ UNVERIFIED |
| CSConcrete Shop INC | Vancouver | WA | — | ◇ UNVERIFIED |
| CSConcrete Specialties CO | Franklin Park | IL | — | ◇ UNVERIFIED |
