| MEMotsinger Enterprises, INC. Dba Motsinger Precast | Winston Salem | NC | — | ◇ UNVERIFIED |
| MBMt Baker Silo INC | Lynden | WA | — | ◇ UNVERIFIED |
| MCMurray Concrete Batch Plant G-2 | Murray | UT | — | ◇ UNVERIFIED |
| MTMurrill Tank Service, INC. | Mobile | AL | — | ◇ UNVERIFIED |
| NVNapa Valley Cast Stone | American Canyon | CA | — | ◇ UNVERIFIED |
| NCNational Concrete Products | Plymouth | MI | — | ◇ UNVERIFIED |
| NFNatl Fuel Gas Supply/east Fork Comp Sta | Austin | PA | — | ◇ UNVERIFIED |
| NFNatl Fuel Gas Supply/knox Station | Brookville | PA | — | ◇ UNVERIFIED |
| NPNc Products Corporation - Fuquay | Fuquay Varina | NC | — | ◇ UNVERIFIED |
| NENcv Enterprises LLC | Palmetto | GA | — | ◇ UNVERIFIED |
| NPNebraska Precast, LLC | Columbus | NE | — | ◇ UNVERIFIED |
 Nelson Precast Products, LLC | Baltimore | MD | — | ◇ UNVERIFIED |
| Nelson Precast Products, LLC | Towson | MD | — | ◇ UNVERIFIED |
| NBNew Bethlehem Burial Services, INC. | New Bethlehem | PA | — | ◇ UNVERIFIED |
| NPNewcastle Precast LLC | Portland | OR | — | ◇ UNVERIFIED |
| NTNewcold Tacoma | Tacoma | WA | — | ◇ UNVERIFIED |
| NSNewman & Sons INC. | Bloomington | CA | — | ◇ UNVERIFIED |
| NINicmar Industries INC Dba George R Roberts Company | Alfred | ME | — | ◇ UNVERIFIED |
| NCNitterhouse Concrete Precast Plt | Chambersburg | PA | — | ◇ UNVERIFIED |
| NANorth American Pipe & Precast | Courtland | MN | — | ◇ UNVERIFIED |
| NANorth American Precast Company | Houston | TX | — | ◇ UNVERIFIED |
| NANortheast Architectural Products INC. | Archbald | PA | — | ◇ UNVERIFIED |
| NONortheast Ohio Precast LLC | Salem | OH | — | ◇ UNVERIFIED |
| NPNortheast Prestressed Products, LLC | Brogue | PA | — | ◇ UNVERIFIED |
| NPNortheast Prestressed Products, LLC. | Pottsville | PA | — | ◇ UNVERIFIED |
| NCNorthern Concrete-charlotte | Charlotte | MI | — | ◇ UNVERIFIED |
| NINorthern Il Wilbert Vault CO INC | Belvidere | IL | — | ◇ UNVERIFIED |
| NMNorthfield Mundelein Plant | Mundelein | IL | — | ◇ UNVERIFIED |
| NRNorthgate Ready Mix | Windsor | CA | — | ◇ UNVERIFIED |
| NMNorth Marina Ameron Hulbert | Everett | WA | — | ◇ UNVERIFIED |
| NINorthwest Illinois Construction CO | Rock Falls | IL | — | ◇ UNVERIFIED |
| NPNorthwest Pipe Company, LLC | Tracy | CA | — | ◇ UNVERIFIED |
| NCNorthwind Concrete Products CO | Posen | IL | — | ◇ UNVERIFIED |
| NCNorthwind Concrete Products CO | South Beloit | IL | — | ◇ UNVERIFIED |
 Norwalk Concrete Industries, INC. | Norwalk | OH | — | ◇ UNVERIFIED |
| NVNorwalk Vault CO. of Missouri INC. | Saint Louis | MO | — | ◇ UNVERIFIED |
| NCNova Crete, INC. | Fort Lee | NJ | — | ◇ UNVERIFIED |
| NANov Ameron | Anniston | AL | — | ◇ UNVERIFIED |
| NINucast Industries INC | Corona | CA | — | ◇ UNVERIFIED |
| NLNurazzo, LLC | Dalton | GA | — | ◇ UNVERIFIED |
| NCNW Concrete Vent Wells LLC | Gervais | OR | — | ◇ UNVERIFIED |
| OCOaks Concrete Products INC | Wixom | MI | — | ◇ UNVERIFIED |
| OLOberfield's LLC | Delaware | OH | — | ◇ UNVERIFIED |
| OGOcean Granite and Marble LLC | Little Egg Harbor Twp | NJ | — | ◇ UNVERIFIED |
| OCOgden Concrete Batch Plant G19 | Ogden | UT | — | ◇ UNVERIFIED |
| OOldcastle | Keizer | OR | — | ◇ UNVERIFIED |
| OOldcastle | Eugene | OR | — | ◇ UNVERIFIED |
| OOldcastle | Lebanon | PA | — | ◇ UNVERIFIED |
| OAOldcastle Apg South INC | Rockwood | TN | — | ◇ UNVERIFIED |
| OCOldcastle Coastal | Tampa | FL | — | ◇ UNVERIFIED |
