| BBluedot-readi-mix-shelby (plant #106) | Shelby | NC | — | ◇ UNVERIFIED |
| BMBluegrass Materials Marriottsville Quarry | Marriottsville | MD | — | ◇ UNVERIFIED |
| BMBluegrass Materials Rockdale Quarry | Clear Spring | MD | — | ◇ UNVERIFIED |
| BRBlue Ridge Concrete Products, INC. | Cana | VA | — | ◇ UNVERIFIED |
| BRBlue Ridge Concrete Products INC - Hillsville | Cana | VA | — | ◇ UNVERIFIED |
| BSBlue Springs Division of B and B Concrete Company INC | Blue Springs | MS | — | ◇ UNVERIFIED |
| BRBluewing Ready Mix Plant | San Antonio | TX | — | ◇ UNVERIFIED |
| BBluffton #344 | Bluffton | SC | — | ◇ UNVERIFIED |
| BBlythe | Charlotte | NC | — | ◇ UNVERIFIED |
| BBBlythe Brothers Asphalt Co., LLC - Concord Plant | Concord | NC | — | ◇ UNVERIFIED |
| BCBlythe Construction, INC. - Mallard Creek Plant | Charlotte | NC | — | ◇ UNVERIFIED |
| BPBlythe Portable Plant | Bangor | ME | — | ◇ UNVERIFIED |
| BZBlythe Zachry Jv - Batch Plant 2 | Gaffney | SC | — | ◇ UNVERIFIED |
| BPBob Propheter Construction LLC | Utica | IL | — | ◇ UNVERIFIED |
| BPBob Propheter Construction LLC | Sterling | IL | — | ◇ UNVERIFIED |
| BPBoccella Precast | Winslow Twp | NJ | — | ◇ UNVERIFIED |
| BPBoccella Precast LLC | Berlin | NJ | — | ◇ UNVERIFIED |
| BCBoger Concrete CO INC Fiddlers Elbow | Middletown | PA | — | ◇ UNVERIFIED |
| BPBoggs Paving, INC. | Monroe | NC | — | ◇ UNVERIFIED |
| BCBolton Concrete Products INC. | Johnson City | TN | — | ◇ UNVERIFIED |
| BCBomat - Campell Industrial Park (cip) | Kapolei | HI | — | ◇ UNVERIFIED |
| BCBond Construction Corporation | Spencer | MA | — | ◇ UNVERIFIED |
| BCBonded Concrete Pittsfield Plant | Pittsfield | MA | — | ◇ UNVERIFIED |
| BPBond Paving Company Inc, Gulfport | Gulfport | MS | — | ◇ UNVERIFIED |
| BABonsal American INC | Katy | TX | — | ◇ UNVERIFIED |
| BABonsal American INC | Kenvil | NJ | — | ◇ UNVERIFIED |
| BFBooher Felix Pit, Gcp3-3835 | Hagerman | NM | — | ◇ UNVERIFIED |
| B1Boone 1 - Nc Rmc | Boone | NC | — | ◇ UNVERIFIED |
| BRBoone Ready Mix INC | Burlington | KY | — | ◇ UNVERIFIED |
| BRBoone Ready-mix INC | Boone | NC | — | ◇ UNVERIFIED |
| BRBoral Roofing LLC | Phoenix | AZ | — | ◇ UNVERIFIED |
| BPBoston Power Crushing CORP | Groveland | MA | — | ◇ UNVERIFIED |
| BABoutte Asphalt Plant | Boutte | LA | — | ◇ UNVERIFIED |
| BGBowling Green Concrete - Rockfield Ready-mix Plant | Rockfield | KY | — | ◇ UNVERIFIED |
| BCBowman Construction Company INC | International Falls | MN | — | ◇ UNVERIFIED |
| BMBoxley Materials Co-bluefield Ready Mix Plt | Bluefield | VA | — | ◇ UNVERIFIED |
| BMBoxley Materials Company - 30022 | Lynchburg | VA | — | ◇ UNVERIFIED |
| BMBoxley Materials Company - 30968 | Concord | VA | — | ◇ UNVERIFIED |
| BMBoxley Materials Company Roanoke Ready Mix Plant | Roanoke | VA | — | ◇ UNVERIFIED |
| BRBoxley Ready Mix LLC - Martinsville Plant | Martinsville | VA | — | ◇ UNVERIFIED |
| BRBoxley Ready Mix LLC - Wytheville Concrete | Wytheville | VA | — | ◇ UNVERIFIED |
| BRBoxley Ready Mix LLC - Wytheville Concrete Plant | Wytheville | VA | — | ◇ UNVERIFIED |
| BLBoykin Lee Road Batch Plant | Mascotte | FL | — | ◇ UNVERIFIED |
| BIBpi INC - Schenley Pa Plant | Schenley | PA | — | ◇ UNVERIFIED |
| BBBradbury Burial Vault CO INC | Gloucester Twp | NJ | — | ◇ UNVERIFIED |
| BBBradenton Block 9th St | Bradenton | FL | — | ◇ UNVERIFIED |
| BTBradley Tank & Pipe, LLC | Mcdonald | TN | — | ◇ UNVERIFIED |
| BRBrannan Ready Mix Company | Denver | CO | — | ◇ UNVERIFIED |
| BSBrannan Sand & Gravel | Denver | CO | — | ◇ UNVERIFIED |
| BSBrannan Sand & Gravel - I-76 Apm | Commerce City Area | CO | — | ◇ UNVERIFIED |