| NLNhmf, LLC | Columbus | OH | — | ◇ UNVERIFIED |
| NANorthfield an Oldcastle Company | Sheffield Lake | OH | — | ◇ UNVERIFIED |
| NBNorthfield Block CO | Morris | IL | — | ◇ UNVERIFIED |
| NFNorthfield Forest View | Berwyn | IL | — | ◇ UNVERIFIED |
| NNorthfield-rhino | West Des Moines | IA | — | ◇ UNVERIFIED |
| NLNusfc, LLC | Medley | FL | — | ◇ UNVERIFIED |
| OOOberfields - Obetz, Oh Hardscapes Plant | Columbus | OH | — | ◇ UNVERIFIED |
| OSOberfields - Sunbury, Oh Masonry Plant | Sunbury | OH | — | ◇ UNVERIFIED |
| OOldcastle | Morgan Hill | CA | — | ◇ UNVERIFIED |
| OOldcastle | Kenosha | WI | — | ◇ UNVERIFIED |
| OOldcastle | Lockport | IL | — | ◇ UNVERIFIED |
| OOldcastle | Elgin | IL | — | ◇ UNVERIFIED |
| OCOld Castle - Acworth | Acworth | GA | — | ◇ 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 | Pompano Beach | FL | — | ◇ UNVERIFIED |
| OCOldcastle Coastal Concrete Products | Orlando | FL | — | ◇ UNVERIFIED |
| OCOldcastle Coastal Concrete Products | West Palm Beach | FL | — | ◇ UNVERIFIED |
| OCOldcastle Coastal, INC. | Zephyrhills | FL | — | ◇ UNVERIFIED |
| OCOld Castle Infrastructure | Fuquay Varina | NC | — | ◇ UNVERIFIED |
 Oldcastle Infrastructure INC. | Fredericksburg | VA | — | ◇ UNVERIFIED |
| Oldcastle Infrastructure INC. - Courtland | Courtland | MN | — | ◇ UNVERIFIED |
| OMOldcastle Matt Stone Holdings Incorporated | Cowpens | SC | — | ◇ UNVERIFIED |
| OPOldcastle Precast | Mansfield | TX | — | ◇ UNVERIFIED |
| OPOldcastle Precast | Idaho Falls | ID | — | ◇ UNVERIFIED |
| OPOldcastle Precast | Lakeside | CA | — | ◇ UNVERIFIED |
| OPOldcastle Precast | Lebanon | TN | — | ◇ UNVERIFIED |
| OPOldcastle Precast | Houston | TX | — | ◇ UNVERIFIED |
| OPOldcastle Precast | Avon | CT | — | ◇ UNVERIFIED |
| OPOldcastle Precast | Kalamazoo | MI | — | ◇ UNVERIFIED |
| OPOldcastle Precast Brookshire Plant | Brookshire | TX | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC | Littleton | CO | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC | Middle Island | NY | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC | Orlando | FL | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC | Chandler | AZ | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC. | Edgewood | MD | — | ◇ UNVERIFIED |
| OPOldcastle Precast, INC. - Bellingham | Bellingham | WA | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC - Concord | Concord | NC | — | ◇ UNVERIFIED |
| OPOldcastle Precast, INC. - Jacksonvillesp | Jacksonville | FL | — | ◇ UNVERIFIED |
| OPOldcastle Precast, INC. - Tallahasseesp | Midway | FL | — | ◇ UNVERIFIED |
| OPOldcastle Precast San Antonio Plant | San Antonio | TX | — | ◇ UNVERIFIED |
| OPOldcastle Precast Telco | Newnan | GA | — | ◇ UNVERIFIED |
| OROldcastle Retail INC | Oxford | MA | — | ◇ UNVERIFIED |
| OROldcastle Retail INC (dba Bonsal American) | Lilesville | NC | — | ◇ UNVERIFIED |
| OROldcastle Retail INC (dba Bonsal American) | Canaan | CT | — | ◇ UNVERIFIED |
