| OBOrco Block CO INC | Stanton | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| OBOrco Block CO INC | Banning | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| OBOrco Block & Hardscape | Oceanside | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| OBOregon Block and Paver Manufacturing INC | Prineville | OR | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| OCOrnamental Concrete INC | Arvada | CO | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| OLO.T.S. Logistics, LLC | Brownstown | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| PSPacific Structures | Riverside | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| PPPaveloc Plus LLC | Rosenberg | TX | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| PCPayless Concrete Products, INC. | Iola | KS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PBPhoenix Block CO. LLC | Montgomery | AL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| PDPinnacle Design/build Group INC | Corvallis | OR | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| PMPlasterglass Manufacturing | Omaha | NE | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| PIPre-cal INC Dba Ginger Precast Designs | Riverside | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| PPPrecision Precast INC | Pittsfield | MA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| PFP.w. Feenstra - Port. Conc. Batch Plnt 3 | Queen Creek | AZ | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| PCPyramid Construction and Aggregates | Imperial County | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| PPPyramid Pavers, LLC | Englewood | FL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| QOQuikrete of Ca Dba Quikrete City of Industry | Industry | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RBRancho Block Company | San Bernardino | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RBRcp Block & Brick INC | Santee | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RBRcp Block & Brick INC | San Diego | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RBRcp Block & Brick INC. | Lemon Grove | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RSRebar Spacer Block Company INC | Alviso | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RFR F Herrera Concrete Construction | San Dimas | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RCRiccobene Concrete Masonry and Design | Albuquerque | NM | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RBRiverview Block INC. | Berwick | PA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RRRobertsons Ready Mix | Escondido | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RBRobinson Brick CO | Aurora | CO | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RBRobinson Brick CO | Denver | CO | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RCRochester Concrete Products | Rochester | MN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RBRocks & Blocks Landscaping & Contracting LLC | Bismarck | ND | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RCRuby Concrete Company INC | Madisonville | KY | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SMSaldanas Masonry | Brownsville | TX | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SCSather Construction, LLC | Boise | ID | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SCSchuur Concrete LLC | Chandler | MN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SCSd Concrete Pumping INC | Santee | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SCSesser Concrete Products CO | Sesser | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SBSeymore Bros, INC. | Altoona | PA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SBShaffer Block & Concrete Products | Somerset | PA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SCSierra Construction, INC. | Channelview | TX | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SCSilver Creek Stoneworks INC | Rochester | MN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SSSims Stone CO. of Georgia, LLC | Woodbury | GA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SBSnyder Brick and Block | Columbus | OH | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SBSnyder Brick & Block | Dayton | OH | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SBSouthern Block Company | Warsaw | NC | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SCSouthern Concrete Materials, INC Dba Charlotte Blo | Charlotte | NC | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SPSouthern Products | Sardis | MS | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SCSpringfield Concrete Block & Brick, INC. | Springfield | OH | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SBStandard Block Company, Inc. | Newnan | GA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SRState Road Cement Block | Dartmouth | MA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
