| NNorthfield-indianapolis | Indianapolis | IN | — | ◇ UNVERIFIED |
| NNorthfield-rhino | West Des Moines | IA | — | ◇ UNVERIFIED |
| NSNorth Salt Lake Batch Plant | Salt Lake City | UT | — | ◇ UNVERIFIED |
| NCNucor CORP - Darlington Plant | Darlington | SC | — | ◇ UNVERIFIED |
| NNyack | Valley Cottage | NY | — | ◇ UNVERIFIED |
| OOOberfields - Obetz, Oh Hardscapes Plant | Columbus | OH | — | ◇ UNVERIFIED |
| OSOberfields - Sunbury, Oh Masonry Plant | Sunbury | OH | — | ◇ UNVERIFIED |
| OROconnor Ready Mix Plant 11 | San Antonio | TX | — | ◇ UNVERIFIED |
| OFOdessa Facility | Odessa | FL | — | ◇ UNVERIFIED |
| OAOldcastle Adams Products | Clarksville | TN | — | ◇ UNVERIFIED |
| OAOldcastle Apg Mid-atlantic | Chesapeake | VA | — | ◇ UNVERIFIED |
| OAOldcastle Apg Mid-atlantic Crofton, Md | Odenton | MD | — | ◇ UNVERIFIED |
| OAOldcastle Apg Mid-atlantic Richmond, Va | Richmond | VA | — | ◇ UNVERIFIED |
| OAOldcastle Apg New England | Victor | NY | — | ◇ UNVERIFIED |
| OAOldcastle Apg New England | Cranston | RI | — | ◇ UNVERIFIED |
| OAOldcastle Apg Northeast, INC. | West Lebanon | NH | — | ◇ UNVERIFIED |
| OAOldcastle Apg South, INC | Pensacola | FL | — | ◇ UNVERIFIED |
| OAOldcastle Architectural West INC | Dallas | TX | — | ◇ UNVERIFIED |
| OAOldcastle Architectural West INC | Austin | TX | — | ◇ UNVERIFIED |
| OAOldcastle Architectural West INC | Rosenberg | TX | — | ◇ UNVERIFIED |
| OCOldcastle Coastal Concrete Products | Orlando | FL | — | ◇ UNVERIFIED |
| OCOldcastle Coastal Concrete Products | West Palm Beach | FL | — | ◇ UNVERIFIED |
| OCOldcastle Coastal, INC. | Zephyrhills | FL | — | ◇ UNVERIFIED |
| OIOldcastle Infrastructure | Topeka | KS | — | ◇ UNVERIFIED |
| OIOldcastle Infrastructure | Platteville | CO | — | ◇ UNVERIFIED |
 Oldcastle Infrastructure INC. | Fredericksburg | VA | — | ◇ UNVERIFIED |
| OMOldcastle Matt Stone Holdings Incorporated | Cowpens | SC | — | ◇ UNVERIFIED |
| OPOldcastle Precast | Idaho Falls | ID | — | ◇ UNVERIFIED |
| OPOldcastle Precast | Avon | CT | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC | North Fort Myers | FL | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC | Orlando | FL | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC | Medley | FL | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC - Concord | Concord | NC | — | ◇ UNVERIFIED |
| OPOldcastle Precast Incorported | Rehoboth | MA | — | ◇ UNVERIFIED |
| OPOrchard Park Plant | Orchard Park | NY | — | ◇ UNVERIFIED |
| OCOwatonna Construction CO - Masonry | Medford | MN | — | ◇ UNVERIFIED |
| OSOxford Sand Company Inc, Oxford Plant | Oxford | MS | — | ◇ UNVERIFIED |
| OROzark Ready Mix Kc - Kansas City, Kansas | Kansas City | KS | — | ◇ UNVERIFIED |
| OROzark Ready Mix Kc - Kansas City, Missouri | Kansas City | MO | — | ◇ UNVERIFIED |
| OROzark Ready Mix Kc - Olathe, Kansas | Olathe | KS | — | ◇ UNVERIFIED |
| OROzark Ready Mix - Osage Beach | Osage Beach | MO | — | ◇ UNVERIFIED |
| OROzark Ready Mix - Show Me Ready Mix | Lake Lotawana | MO | — | ◇ UNVERIFIED |
| OBOzinga Bros Inc-mccook Plant | Mccook | IL | — | ◇ UNVERIFIED |
| OBOzinga Brothers Ready Mix Concrete | Crown Point | IN | — | ◇ UNVERIFIED |
| OCOzinga Chicago Rmc INC | Chicago | IL | — | ◇ UNVERIFIED |
| OCOzinga Concrete Products | Sycamore | IL | — | ◇ UNVERIFIED |
| OIOzinga Illinois Rmc INC | Joliet | IL | — | ◇ UNVERIFIED |
| OIOzinga Illinois Rmc INC | Alsip | IL | — | ◇ UNVERIFIED |
| OIOzinga Illinois Rmc INC | Plainfield | IL | — | ◇ UNVERIFIED |
| OIOzinga Illinois Rmc INC | Montgomery | IL | — | ◇ UNVERIFIED |
