| PSPrestress Systems | Fort Myers | FL | — | ◇ UNVERIFIED |
| PBPrice Brothers Company | Perryman | MD | — | ◇ UNVERIFIED |
| PSProject Staffing, INC. | Topsham | ME | — | ◇ UNVERIFIED |
| PIPro-mix INC. / Structural Prestressed Industries | Medley | FL | — | ◇ UNVERIFIED |
| PIProplants, INC. | Phoenix | AZ | — | ◇ UNVERIFIED |
| PTPro Tec International | Osprey | FL | — | ◇ UNVERIFIED |
| PSProvia Stone LLC | Sugarcreek | OH | — | ◇ UNVERIFIED |
| PPP&s Paving, INC. | Daytona Beach | FL | — | ◇ UNVERIFIED |
| PLPulsar, LLC | La Vergne | TN | — | ◇ UNVERIFIED |
| PIPyramid Industries LLC | Kihei | HI | — | ◇ UNVERIFIED |
| PPPyramid Precast INC | Rialto | CA | — | ◇ UNVERIFIED |
| QCQuad Cities Concrete Products, LLC | Milan | IL | — | ◇ UNVERIFIED |
| QPQuality Precast Solutions, LLC | Fort Myers | FL | — | ◇ UNVERIFIED |
| QSQuality Stone Veneer, INC. | Refton | PA | — | ◇ UNVERIFIED |
| QSQuality Stone Veneer, INC. | Tower City | PA | — | ◇ UNVERIFIED |
| QSQuality Stone Veneer, INC. | Benson | NC | — | ◇ UNVERIFIED |
| QVQuality Vaults & Monuments, INC. | Ocoee | FL | — | ◇ UNVERIFIED |
| QWQuality Way Products | Holly | MI | — | ◇ UNVERIFIED |
| QVQualty Vaults & Monuments, INC. | Ocoee | FL | — | ◇ UNVERIFIED |
| QQuikrete | Lackawanna | NY | — | ◇ UNVERIFIED |
| QBQuikrete Birmingham, INC. | Birmingham | AL | — | ◇ UNVERIFIED |
| QQuikrete-chicago | Elburn | IL | — | ◇ UNVERIFIED |
| QCQuikrete - Connecticut INC. | Wauregan | CT | — | ◇ UNVERIFIED |
| QIQuikrete International INC. | Miami | FL | — | ◇ UNVERIFIED |
| QKQuikrete - Kentucky | Louisville | KY | — | ◇ UNVERIFIED |
| QNQuikrete Northern California | Fremont | CA | — | ◇ UNVERIFIED |
| QWQuikrete Wisconsin INC | Sussex | WI | — | ◇ UNVERIFIED |
| QWQuincy Wilbert Vault CO | Quincy | IL | — | ◇ UNVERIFIED |
| QBQuintal Burial Vaults, INC | Dighton | MA | — | ◇ UNVERIFIED |
| RPRabers Precast Products | Cambridge | OH | — | ◇ UNVERIFIED |
| RURail.one USA CORP. | Clinton | IA | — | ◇ UNVERIFIED |
| RCRas Concrete Construction, INC. | Naples | FL | — | ◇ UNVERIFIED |
| RLRcss Llc, Dba Redondo Manufacturing | San Antonio | TX | — | ◇ UNVERIFIED |
| RMReady Mix Usa,llc | Birmingham | AL | — | ◇ UNVERIFIED |
| RSRedbay Sand Company INC | Ponce De Leon | FL | — | ◇ UNVERIFIED |
| RMRedondo Manufacturing | San Antonio | TX | — | ◇ UNVERIFIED |
| RVRedwood Valley Gravel Product INC | Redwood Valley | CA | — | ◇ UNVERIFIED |
| RAReliable Asphalt Corporation | Chicago | IL | — | ◇ UNVERIFIED |
| RCReliable Concrete Products and Ornamental Iron, INC. | Kansas City | KS | — | ◇ UNVERIFIED |
| RPRev's Pre-Cast Concrete Corp. | Waukesha | WI | — | ◇ UNVERIFIED |
| RVRex Vault and Mausoleum Services, INC. | Newton | IL | — | ◇ UNVERIFIED |
| RVRex Vault & Mausoleum Service INC | Newton | IL | — | ◇ UNVERIFIED |
| RCRialto Concrete Products, INC. | Palmdale | CA | — | ◇ UNVERIFIED |
 Richards-wilbert INC - Roanoke Valley | Salem | VA | — | ◇ UNVERIFIED |
| RSRichey Services, LLC | Grove | OK | — | ◇ UNVERIFIED |
| RERichwood Equipment Company LLC | Springfield | OH | — | ◇ UNVERIFIED |
| RMRidge Mfg CORP | Rockaway | NJ | — | ◇ UNVERIFIED |
| RRRiley Ready Mix & Materials, INC. | Saint Louis | MO | — | ◇ UNVERIFIED |
| RIRinker Indianapolis Pipe | Indianapolis | IN | — | ◇ UNVERIFIED |
| RMRinker Materials Corporation | Mount Holly | NC | — | ◇ UNVERIFIED |
| RMRinker Materials Hydro Conduit | Denver | CO | — | ◇ UNVERIFIED |
| RMRinker Materials Hydro Conduit | Fresno | CA | — | ◇ UNVERIFIED |
| RSRiviera Stoneworks, INC. | Foley | AL | — | ◇ UNVERIFIED |
| RSRj Staab Stone Company of Florida, LLC | Gainesville | FL | — | ◇ UNVERIFIED |
| RPRmr Products INC | Pacoima | CA | — | ◇ UNVERIFIED |
| RVRoberts Vault Company, INC. | Dade City | FL | — | ◇ UNVERIFIED |
| RHRock Hill Concrete LLC | Dayton | WA | — | ◇ UNVERIFIED |
| RRRock Recycle Company | Sebastopol | CA | — | ◇ UNVERIFIED |
| RCRock-tred CORP | Skokie | IL | — | ◇ UNVERIFIED |
| RMRocky Mountain Precast, LLC | Yigo | GU | — | ◇ UNVERIFIED |
| RMRocky Mountain Prestress | Greeley | CO | — | ◇ UNVERIFIED |
| RMRocky Mountain Prestress LLC (structural Plant) | Denver | CO | — | ◇ UNVERIFIED |
| RMRocky Mt Prestressed | Sheridan | CO | — | ◇ UNVERIFIED |
| RCRocla Concrete Tie Incorporated | Denver | CO | — | ◇ UNVERIFIED |
| RORohn Ornamental Concrete INC | Bethlehem | PA | — | ◇ UNVERIFIED |
| RCRoseville Crushed Concrete | Roseville | MI | — | ◇ UNVERIFIED |
| RCRoyal Concrete Concepts, LLC | Okeechobee | FL | — | ◇ UNVERIFIED |
| RERoyal Enterprises America INC Dba Royal Concrete P | Stacy | MN | — | ◇ UNVERIFIED |
| RRR & R Garden Supply, INC. | Medley | FL | — | ◇ UNVERIFIED |
| RCRsh Construction | Livermore | CA | — | ◇ UNVERIFIED |
| RCRuby Concrete Company INC | Madisonville | KY | — | ◇ UNVERIFIED |
| RBRussell Block Co., INC. | Russell | KS | — | ◇ UNVERIFIED |
| RVRustin Vault & Monument Co., INC. | Chipley | FL | — | ◇ UNVERIFIED |
| RSR.w. Sidley, INC. | Youngwood | PA | — | ◇ UNVERIFIED |
| RSR.w. Sidley, INC. | Slippery Rock | PA | — | ◇ UNVERIFIED |
| SSSacramento Stucco | West Sacramento | CA | — | ◇ UNVERIFIED |
| SVSaline Vault Company INC. | Sweet Springs | MO | — | ◇ UNVERIFIED |
| SDSan Diego Precast Concrete INC | San Diego | CA | — | ◇ UNVERIFIED |
| SDSan Diego Precast, INC. Dba Pomeroy | Perris | CA | — | ◇ UNVERIFIED |
| SAS and N Concrete | Anaconda | MT | — | ◇ UNVERIFIED |
| SISandstone, Inc. | Shawnee | KS | — | ◇ UNVERIFIED |
| SJSan Joaquin Gunite | Sjvapcd | CA | — | ◇ UNVERIFIED |
| SJSan Jose Concrete Pipe CO INC | San Jose | CA | — | ◇ UNVERIFIED |
| SCSannipoli CORP | Menifee | CA | — | ◇ UNVERIFIED |
| SCSannipoli Corporation | Fairfield | CA | — | ◇ UNVERIFIED |
| SVSanteiu Vaults INC | Livonia | MI | — | ◇ UNVERIFIED |
| SCSather Concrete Products INC | Merrifield | MN | — | ◇ UNVERIFIED |
| S2Savid 26 LLC | Ventura | CA | — | ◇ UNVERIFIED |
| S2Savid 26 LLC | Baldwin Park | CA | — | ◇ UNVERIFIED |
| SNSax Nick LLC | Gibsonville | NC | — | ◇ UNVERIFIED |
| SISay-core, INC. | Portage | PA | — | ◇ UNVERIFIED |
| SPSchier Products Company | Kansas City | KS | — | ◇ UNVERIFIED |
| SCScituate Concrete Products | Marshfield | MA | — | ◇ UNVERIFIED |
| SCScripture's Concrete INC. | Rockport | ME | — | ◇ UNVERIFIED |
| SSSculptured Stone INC. | Fairfield | NJ | — | ◇ UNVERIFIED |
| SCSeaboard Concrete Products Company Incorporated | Richmond | VA | — | ◇ UNVERIFIED |
| SPSebring Precast Products, INC. | Sebring | FL | — | ◇ UNVERIFIED |
| SVSecure Vault Company, INC. | Cook | MN | — | ◇ UNVERIFIED |
| SISelectcrete INC | Bakersfield | CA | — | ◇ UNVERIFIED |
| SSSelkirk Stone INC | Sandpoint | ID | — | ◇ UNVERIFIED |
