| LILenox INC (dba Lenox China) | Oxford | — | ◇ UNVERIFIED |
| LBLeonard Block Company | Winston Salem | — | ◇ UNVERIFIED |
| LBLightweight Block Lexington Corporation | Lexington | — | ◇ UNVERIFIED |
| LCLmp Concrete, INC. | Pink Hill | — | ◇ UNVERIFIED |
| LCLoflin Concrete CO. -- Pisgah Church Rd. | Kernersville | — | ◇ UNVERIFIED |
| LSLs Starrett CO | Mount Airy | — | ◇ UNVERIFIED |
| MUMafic USA LLC ** Inactive ** | Shelby | — | ◇ UNVERIFIED |
| MMMartin Marietta Materials Incorporated | Raleigh | — | ◇ UNVERIFIED |
| MMMartin Marietta Materials, INC. - Rocky Point | Rocky Point | — | ◇ UNVERIFIED |
| MMMartin Marietta Materials, INC. - Wilson Quarry | Wilson | — | ◇ UNVERIFIED |
| MRMassey Ready-mix Concrete, INC. | Greensboro | — | ◇ UNVERIFIED |
| MHMccarthy Henderson Concrete Batch Plant | Henderson | — | ◇ UNVERIFIED |
| MCMcdowell Concrete Supply, LLC | Marion | — | ◇ UNVERIFIED |
| MBMcgee Brothers Company Incorporated | Midland | — | ◇ UNVERIFIED |
| MCMetromont Corporation | Charlotte | — | ◇ UNVERIFIED |
| MMMetromont Materials-catawba | Hickory | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation | Marion | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation - Concord Plt | Concord | — | ◇ UNVERIFIED |
| MMMetromont Materials Corporation - Indian Trail Plant | Indian Trail | — | ◇ UNVERIFIED |
| MMMetromont Materials Limited Liability Company | North Wilkesboro | — | ◇ UNVERIFIED |
| MPMetromont Prestress Company | Charlotte | — | ◇ UNVERIFIED |
| MMMix Masters Concrete, INC. | Beulaville | — | ◇ UNVERIFIED |
| MCMurdock Concrete Company | Greensboro | — | ◇ UNVERIFIED |
| NPNc Products Corporation - Fuquay | Fuquay Varina | — | ◇ UNVERIFIED |
| NRNortheastern Ready Mix INC | Elizabeth City | — | ◇ UNVERIFIED |
| OCOld Carolina Brick Gold Hill | Gold Hill | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC | Greensboro | — | ◇ UNVERIFIED |
| PCPavestone - Charlotte, Nc Plant | Charlotte | — | ◇ UNVERIFIED |
| PRPhillips Ready Mix Concrete, INC. | Yadkinville | — | ◇ UNVERIFIED |
| PCPlt Concrete Services, INC. | Wilson | — | ◇ UNVERIFIED |
| PCPlt Concrete Services, Incorporated | Zebulon | — | ◇ UNVERIFIED |
| PMPrince Minerals, LLC - Monroe | Monroe | — | ◇ UNVERIFIED |
| PCPugh Concrete Company | Pittsboro | — | ◇ UNVERIFIED |
| QCQuality Concrete Company | Fayetteville | — | ◇ UNVERIFIED |
| QCQuikrete - Charlotte, Nc Plant | Peachland | — | ◇ UNVERIFIED |
| RIRauch Industries - South York Road Plant | Gastonia | — | ◇ UNVERIFIED |
| RCRea Contracting, LLC 0140 Concrete Plant | Salisbury | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete | Rocky Mount | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete - Clinton Plant | Clinton | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete CO | Rural Hall | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete CO - Greenville | Greenville | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete Company | Williamston | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete Company | Wilmington | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete Company | Winston Salem | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete Company - Castle Hayne | Castle Hayne | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete Company - Havelock | Havelock | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete Company-reames Plan | Charlotte | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete Company - Shallotte | Shallotte | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete CO Plant 33 | New Bern | — | ◇ UNVERIFIED |
| RMReady Mixed Concrete - Fayetteville Plant | Fayetteville | — | ◇ UNVERIFIED |
