| QOQuikrete of Ca Dba Quikrete City of Industry | Industry | CA | — | ◇ UNVERIFIED |
| RBRancho Block Company | San Bernardino | CA | — | ◇ UNVERIFIED |
| RBRcp Block & Brick INC | Santee | CA | — | ◇ UNVERIFIED |
| RBRcp Block & Brick INC | San Diego | CA | — | ◇ UNVERIFIED |
| RBRcp Block & Brick INC. | Lemon Grove | CA | — | ◇ UNVERIFIED |
| RMReady Mix USA Llc- Jasper Block Plant | Jasper | AL | — | ◇ UNVERIFIED |
| RMReady Mix Usa, LLC - Sylacauga Block | Sylacauga | AL | — | ◇ UNVERIFIED |
| RSRebar Spacer Block Company INC | Alviso | CA | — | ◇ UNVERIFIED |
| RFR F Herrera Concrete Construction | San Dimas | CA | — | ◇ UNVERIFIED |
| RCRiccobene Concrete Masonry and Design | Albuquerque | NM | — | ◇ UNVERIFIED |
| RBRiverview Block INC. | Berwick | PA | — | ◇ UNVERIFIED |
| RRRobertson's Ready Mix | San Diego | CA | — | ◇ UNVERIFIED |
| RRRobertsons Ready Mix | Escondido | CA | — | ◇ UNVERIFIED |
| RBRobinson Block LLC (was Colo Cncrt Mfg) | Colorado Springs | CO | — | ◇ UNVERIFIED |
| RBRobinson Brick CO | Denver | CO | — | ◇ UNVERIFIED |
| RBRobinson Brick CO | Aurora | CO | — | ◇ UNVERIFIED |
| RCRochester Concrete Products | Rochester | MN | — | ◇ UNVERIFIED |
| RCRockford Cement Products CO | Rockford | IL | — | ◇ UNVERIFIED |
| RBRocks & Blocks Landscaping & Contracting LLC | Bismarck | ND | — | ◇ UNVERIFIED |
| RLRoofblok Limited | Gardner | MA | — | ◇ UNVERIFIED |
| RCRosebud Concrete INC | Mission | SD | — | ◇ UNVERIFIED |
| RCRuby Concrete Company INC | Madisonville | KY | — | ◇ UNVERIFIED |
| SMSaldanas Masonry | Brownsville | TX | — | ◇ UNVERIFIED |
| SCSather Construction, LLC | Boise | ID | — | ◇ UNVERIFIED |
| SCSchuur Concrete LLC | Chandler | MN | — | ◇ UNVERIFIED |
| SIScurlock Industries of Springfield-springfiled | Springfield | MO | — | ◇ UNVERIFIED |
| SCSd Concrete Pumping INC | Santee | CA | — | ◇ UNVERIFIED |
| SCSequatchie Concrete Service INC | Madison | AL | — | ◇ UNVERIFIED |
| SCSequatchie Concrete Service, Inc-closed | Nashville | TN | — | ◇ UNVERIFIED |
| SCSesser Concrete Products CO | Sesser | IL | — | ◇ UNVERIFIED |
| SBSeymore Bros, INC. | Altoona | PA | — | ◇ UNVERIFIED |
| SBShaffer Block & Concrete Products | Somerset | PA | — | ◇ UNVERIFIED |
 Sherman Industries,inc. | Birmingham | AL | — | ◇ UNVERIFIED |
| SCSierra Construction, INC. | Channelview | TX | — | ◇ UNVERIFIED |
| SCSilver Creek Stoneworks INC | Rochester | MN | — | ◇ UNVERIFIED |
| SSSims Stone CO. of Georgia, LLC | Woodbury | GA | — | ◇ UNVERIFIED |
| S3Skanska - 3 Mile Bridge Pre-cast Facility | Pensacola | FL | — | ◇ UNVERIFIED |
| SBSnyder Brick and Block | Columbus | OH | — | ◇ UNVERIFIED |
| SBSnyder Brick & Block | Dayton | OH | — | ◇ UNVERIFIED |
| SBSouthern Block Company | Warsaw | NC | — | ◇ UNVERIFIED |
| SCSouthern Concrete Materials, INC Dba Charlotte Blo | Charlotte | NC | — | ◇ UNVERIFIED |
| SPSouthern Products | Sardis | MS | — | ◇ UNVERIFIED |
| SCSpeer Concrete, INC. | Carthage | NC | — | ◇ UNVERIFIED |
| SCSpringfield Concrete Block & Brick, INC. | Springfield | OH | — | ◇ UNVERIFIED |
| SCSrm Concrete, Llc, Concrete Block Plant #911 | Saint Paris | OH | — | ◇ UNVERIFIED |
| SPSrm Plant 14120 Blue Wing | San Antonio | TX | — | ◇ UNVERIFIED |
| SSStaffing Services, INC. | Lincoln | NE | — | ◇ UNVERIFIED |
| SBStandard Block Company, Inc. | Newnan | GA | — | ◇ UNVERIFIED |
| SSStandard Supply CO | Maysville | KY | — | ◇ UNVERIFIED |
| SRState Road Cement Block | Dartmouth | MA | — | ◇ UNVERIFIED |
| SMStavola Materials Oldwick Quarry | Oldwick | NJ | — | ◇ UNVERIFIED |
| SHSt. Henry Tile Co., INC. | Greenville | OH | — | ◇ UNVERIFIED |
| SSStockman Stoneworks* | Jefferson City | MO | — | ◇ UNVERIFIED |
| STSuncoast Tampa Bay Block Turkey Creek Facility | Plant City | FL | — | ◇ UNVERIFIED |
| SCSuncore Construction & Materials, INC. -st. George Masonry | Saint George | UT | — | ◇ UNVERIFIED |
| SMSuncore Masonry Bluffdale Plant | Riverton | UT | — | ◇ UNVERIFIED |
| SCSuperior Concrete Block Company | Mankato | MN | — | ◇ UNVERIFIED |
| SCSuperior Concrete Fence of Texas, Inc. | Euless | TX | — | ◇ UNVERIFIED |
| SBSuperlite Block | Needles | CA | — | ◇ UNVERIFIED |
| SPSuperock Products, LLC | Childersburg | AL | — | ◇ UNVERIFIED |
| SCSupreme Concrete Block Incorporated | Leesburg | VA | — | ◇ UNVERIFIED |
| TCTankersley Concrete Company INC. | Lewisburg | TN | — | ◇ UNVERIFIED |
| TSTarpon Springs Block Plant | Tarpon Springs | FL | — | ◇ UNVERIFIED |
| TBTcc Borgert | Saint Joseph | MN | — | ◇ UNVERIFIED |
| TMTcc Materials Companies | Mendota Heights | MN | — | ◇ UNVERIFIED |
| THTDN Holdings, LLC | Haines City | FL | — | ◇ UNVERIFIED |
| TITecho-bloc Incorporated | Pen Argyl | PA | — | ◇ UNVERIFIED |
| TMTecho-bloc Midwest CORP. | Rock Island | IL | — | ◇ UNVERIFIED |
| THTerre Hill Silo Company INC | Terre Hill | PA | — | ◇ UNVERIFIED |
| TFTest Facility 69 Revised | Fort Wayne | IN | — | ◇ UNVERIFIED |
| TFThe Fagenstrom CO | Great Falls | MT | — | ◇ UNVERIFIED |
| TLThe Lane Construction Crafton | Pittsburgh, Pa | PA | — | ◇ UNVERIFIED |
| TQThe Quikrete Companies | San Diego | CA | — | ◇ UNVERIFIED |
| TTThe Turner Company | Rhome | TX | — | ◇ UNVERIFIED |
| TPTheut Prod INC | Romeo | MI | — | ◇ UNVERIFIED |
| TBTiffany Brick - Ogden Plant | Schertz | TX | — | ◇ UNVERIFIED |
| TPTindall Precast Concrete | Moss Point | MS | — | ◇ UNVERIFIED |
| THTison & Hall Concrete Prod INC | Harrisburg | IL | — | ◇ UNVERIFIED |
| TBTitan Block | Frederiksted | VI | — | ◇ UNVERIFIED |
| TFTitan Florida-canal Street | Fort Myers | FL | — | ◇ UNVERIFIED |
| TBTompkinsville Block CO | Tompkinsville | KY | — | ◇ UNVERIFIED |
| TBTop Block, LLC | Norfolk | NE | — | ◇ UNVERIFIED |
| TITranschem INC | Carlsbad | CA | — | ◇ UNVERIFIED |
| TMTransit Mix Concrete & Materials Company | Caruthersville | MO | — | ◇ UNVERIFIED |
| TGTremron Group - Medley | Medley | FL | — | ◇ UNVERIFIED |
| TLTremron LLC | Jacksonville | FL | — | ◇ UNVERIFIED |
| TITrenwa INC | Lakeland | FL | — | ◇ UNVERIFIED |
| TITrenwyth Industries | South Beloit | IL | — | ◇ UNVERIFIED |
| TITrenwyth Industries | South Beloit | IL | — | ◇ UNVERIFIED |
| TITrenwyth Industries - Trendstone Plant | Emigsville | PA | — | ◇ UNVERIFIED |
| TCTri Circle Pavers INC | Fort Myers | FL | — | ◇ UNVERIFIED |
| TDTri Delta a Division of Superlite | North Las Vegas | NV | — | ◇ UNVERIFIED |
| TLTri-krete Limited | Poughkeepsie | NY | — | ◇ UNVERIFIED |
| TWT W Sherman Heirs 15 #3 Facility | Haynesville | LA | — | ◇ UNVERIFIED |
| UCUnion Concrete Products | Maxwelton | WV | — | ◇ UNVERIFIED |
| UBUnited Block CO. | Chicora | PA | — | ◇ UNVERIFIED |
| UUnknown | Miami | FL | — | ◇ UNVERIFIED |
| UOUsdol Osha- Hasbrouck Heights | Lyndhurst | NJ | — | ◇ UNVERIFIED |
| USUtilities Structures | Fort Myers | FL | — | ◇ UNVERIFIED |
| VBValley Block Loveland Facility | Loveland | CO | — | ◇ UNVERIFIED |
