| NANorth Alabama Concrete, INC. | Jasper | AL | — | ◇ UNVERIFIED |
| NANorth American Recycling and Crushing LLC | Anaheim | CA | — | ◇ UNVERIFIED |
| NANorth American Recycling & Crushing, LLC. | Colton | CA | — | ◇ UNVERIFIED |
| NBNorth Bergen | North Bergen | NJ | — | ◇ UNVERIFIED |
| NBNorth Birmingham Plant | Birmingham | AL | — | ◇ UNVERIFIED |
| NCNortheast Concrete Products CORP. | Plainville | MA | — | ◇ UNVERIFIED |
| NRNortheastern Ready Mix INC | Elizabeth City | NC | — | ◇ UNVERIFIED |
| NNNortheast Nanticoke Facility | Nanticoke | PA | — | ◇ UNVERIFIED |
| NSNortheast Solite Corporation | Mount Marion | NY | — | ◇ UNVERIFIED |
| NRNorthern Ready Mix, LLC | Fulton | NY | — | ◇ UNVERIFIED |
| NRNorthgate Ready Mix | Windsor | CA | — | ◇ UNVERIFIED |
| NRNorthgate Ready Mix | Santa Rosa | CA | — | ◇ UNVERIFIED |
| NRNorthgate Ready Mix | Windsor | CA | — | ◇ UNVERIFIED |
| NHNorth Houston Plant | Fort Worth | TX | — | ◇ UNVERIFIED |
| NRNorthland Ready Mix INC | Pleasant Valley | MO | — | ◇ UNVERIFIED |
| NSNorth Star Water Treatment Facility | Grass Valley | CA | — | ◇ UNVERIFIED |
| NSNorth State Asphalt INC. | Cottonwood | CA | — | ◇ UNVERIFIED |
| NVNorth Valley Ready Mix | Chico | CA | — | ◇ UNVERIFIED |
| NANorthwest Aggregates Snoqualmie | Snoqualmie | WA | — | ◇ UNVERIFIED |
| NCNorthwest Concrete Products INC | Roseau | MN | — | ◇ UNVERIFIED |
| NRNorthwest Ready Mix, INC. | Astoria | OR | — | ◇ UNVERIFIED |
| NRNorwalk Ready Mix Concrete INC | Indianola | IA | — | ◇ UNVERIFIED |
| NRNorwalk Ready Mixed Concrete INC. - Desoto | De Soto | IA | — | ◇ UNVERIFIED |
| NPNotus Pit | Caldwell | ID | — | ◇ UNVERIFIED |
| NBNova Brik Midamerica Llc-sikeston | Sikeston | MO | — | ◇ UNVERIFIED |
| NCNuvo Construction Company, INC. | Milwaukee | WI | — | ◇ UNVERIFIED |
| OROakland Ready Mix Company | Oakland | CA | — | ◇ UNVERIFIED |
| OCOberlin Concrete | Oberlin | KS | — | ◇ UNVERIFIED |
| ORO'brien Ready Mix - Chanute Plant | Chanute | KS | — | ◇ UNVERIFIED |
| ORO'brien Ready Mix - Fort Scott Plant | Fort Scott | KS | — | ◇ UNVERIFIED |
| ORO'brien Ready Mix - Frontenac Plant | Frontenac | KS | — | ◇ UNVERIFIED |
| ORObrien Rock Co., INC. | Frontenac | KS | — | ◇ UNVERIFIED |
| ORObrien Rock Co., INC. (see 7770486) | Dexter | KS | — | ◇ UNVERIFIED |
| ORObrien Rock - Galena | Galena | KS | — | ◇ UNVERIFIED |
| OCObt Concrete Batch Plant | Orlando | FL | — | ◇ UNVERIFIED |
| OROceanside Rmc Plant | Oceanside | CA | — | ◇ UNVERIFIED |
| OCOconee Concrete Company, INC. | Opelika | AL | — | ◇ UNVERIFIED |
| OCOconee Concrete Company, INC. | Phenix City | AL | — | ◇ UNVERIFIED |
| ODO Daniel Trucking CO | Grayville | IL | — | ◇ UNVERIFIED |
| OCOdum Concrete Products INC | Benton | IL | — | ◇ UNVERIFIED |
| OCOdum Concrete Products INC | Marion | IL | — | ◇ UNVERIFIED |
| OCOdum Concrete Products INC | Herrin | IL | — | ◇ UNVERIFIED |
| OROhio River Concrete CORP | Marion | KY | — | ◇ UNVERIFIED |
| ONOil-dri North and South Plant | Ochlocknee | GA | — | ◇ UNVERIFIED |
| OTOil Technology INC | East Chicago | IN | — | ◇ UNVERIFIED |
| OAOkeechobee Asphalt/concrete Plant, Cw Roberts Contracting INC. | Okeechobee | FL | — | ◇ UNVERIFIED |
| OAOldcastle Adams Products - Ridgeway | Ridgeway | SC | — | ◇ UNVERIFIED |
| OAOldcastle Apg South INC | Rockwood | TN | — | ◇ UNVERIFIED |
| OAOldcastle Apg South, INC | Lehigh Acres | FL | — | ◇ UNVERIFIED |
| OAOldcastle Apg South, INC. | Auburndale | FL | — | ◇ UNVERIFIED |
| OAOldcastle Apg Texas INC (dba Custom-crete) | Frisco | TX | — | ◇ UNVERIFIED |
| OAOldcastle Apg West/dba Superlite Block | Needles | CA | — | ◇ UNVERIFIED |
| OAOldcastle Architectural West INC | Keller | TX | — | ◇ UNVERIFIED |
| OAOldcastle Architectural West INC | Balch Springs | TX | — | ◇ UNVERIFIED |
| OAOldcastle Architectural West INC | Houston | TX | — | ◇ UNVERIFIED |
| OCOldcastle Coastal INC | Fort Myers | FL | — | ◇ UNVERIFIED |
| OCOld Castle Dba United - Two Feathers Pit | Montrose | CO | — | ◇ UNVERIFIED |
| OEOldcastle Enclosure Solutions | Tracy | CA | — | ◇ UNVERIFIED |
| OIOldcastle Infrastructure | Stockton | CA | — | ◇ UNVERIFIED |
| OIOldcastle Infrastructure INC | Chowchilla | CA | — | ◇ UNVERIFIED |
| OMOldcastle Materials, INC. | Tampa | FL | — | ◇ UNVERIFIED |
| OMOldcastle Materials, INC. | Gainesville | FL | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC | Greensboro | NC | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group - 1771 Shields Dr | Steamboat Springs | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group - Anderson Rmc | Delta | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group Dba Telluride Gravel | Telluride | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group, INC. Dba B&b Excavat | Eagle | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group, INC. Dba B&b Excavat | 0.5 Miles West of Edwardsq | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group INC Dba Four Corners | Pagosa Springs | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group INC. Dba Four Corners | Durango 4.1 Mi. N of | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group INC. Dba Four Corners | Cortez | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group INC Dba United CO of | Paonia | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group - Minturn Concrete | Minturn | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group - Rifle Rmc Plant | Rifle | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Grp - Gunnison Redi-mix Pit | Gunnison Area | CO | — | ◇ UNVERIFIED |
| OUOldcastle United Comp of Mesa County | Rifle | CO | — | ◇ UNVERIFIED |
| OMOld Metro Parkway Concrete Plant | Fort Myers | FL | — | ◇ UNVERIFIED |
| OSOltman & Sons INC | Henry | IL | — | ◇ UNVERIFIED |
| OVOmya Verpol Plant | Florence | VT | — | ◇ UNVERIFIED |
| OPOneonta Plant | Oneonta | AL | — | ◇ UNVERIFIED |
| OMOpta Minerals Harseeville Plant | Hardeeville | SC | — | ◇ UNVERIFIED |
| OROrangeburg Redi-mix Concrete | Orangeburg | SC | — | ◇ UNVERIFIED |
| OROrangeburg Redi-mix Concrete INC Bamberg Plant | Bamberg | SC | — | ◇ UNVERIFIED |
| OROrangeburg Redi-mix Concrete INC Harleyville | Harleyville | SC | — | ◇ UNVERIFIED |
| OBOrco Block CO | Oceanside | CA | — | ◇ UNVERIFIED |
| OOOregon On-site Concrete INC | Sherwood | OR | — | ◇ UNVERIFIED |
| OMOremus Material LLC | Chicago | IL | — | ◇ UNVERIFIED |
| OROrgain Ready Mix Concrete Co., INC. | Murfreesboro | TN | — | ◇ UNVERIFIED |
| OROrgain Ready Mix Concrete Company, INC. | Pleasant View | TN | — | ◇ UNVERIFIED |
| OAOrlando Airport | Orlando | FL | — | ◇ UNVERIFIED |
| OCOsage County Industries | Linn | MO | — | ◇ UNVERIFIED |
| OCOsage County Industries Inc-linn | Linn | MO | — | ◇ UNVERIFIED |
| OCOsborne Concrete & Stone CO (0243030583) | Grand River | OH | — | ◇ UNVERIFIED |
| OIOsborne INC | Mentor | OH | — | ◇ UNVERIFIED |
| OROscar Renda Contracting, INC. | Houston | TX | — | ◇ UNVERIFIED |
| OCOsceola Concrete LLC | Osceola | MO | — | ◇ UNVERIFIED |
| OPOswego Public Works Department | Oswego | NY | — | ◇ UNVERIFIED |
| O0Otfl 001 Eastside Ready Mix379 | San Antonio | TX | — | ◇ UNVERIFIED |
| OIOutback Inc.-oneals Yard | O'neals | CA | — | ◇ UNVERIFIED |
| OMOutback Materials | Mariposa | CA | — | ◇ UNVERIFIED |