| QCQuikrete Construction Materials LLC - Quikrete Ready Mix - Belle Chasse Plant | Belle Chasse | LA | — | ◐ LIKELY ACTIVE |
| QCQuikrete Construction Materials, Llc- St. Augustine Ready Mi | Saint Augustine | FL | — | ◐ LIKELY ACTIVE |
| QMQuikrete - Martinsville | Martinsville | VA | — | ◐ LIKELY ACTIVE |
| RSRbc Sand & Gravel INC. | Darby | MT | — | ◐ LIKELY ACTIVE |
| RMReady Mix Concrete, INC. | Sainte Genevieve, Township of | MO | — | ◐ LIKELY ACTIVE |
| RMReady Mixed Concrete CO | Lincoln | NE | — | ◐ LIKELY ACTIVE |
| RMReady Mixed Concrete Company | Kinston | NC | — | ◐ LIKELY ACTIVE |
| RMReady Mixed Concrete Company Garner Number 5 | Garner | NC | — | ◐ LIKELY ACTIVE |
| RMReady Mixed Concrete Company, Plant #9, Louisburg | Louisburg | NC | — | ◐ LIKELY ACTIVE |
| RMReady Mixed Concrete Company Wilson | Sims | NC | — | ◐ LIKELY ACTIVE |
| RMReady Mix Solutions LLC | Murphysboro | IL | — | ◐ LIKELY ACTIVE |
| RSReady-mix Solutions LLC | Carbondale | IL | — | ◐ LIKELY ACTIVE |
| RMReady Mix USA - Alexander City Facility | Alexander City | AL | — | ◐ LIKELY ACTIVE |
| RMReady Mix Usa, LLC - Andalusia Facility | Andalusia | AL | — | ◐ LIKELY ACTIVE |
| RMReady Mix Usa, LLC - Monroeville Facility | Monroeville | AL | — | ◐ LIKELY ACTIVE |
| RMReady Mix USA - New Tazewell | New Tazewell | TN | — | ◐ LIKELY ACTIVE |
| RMReady Mix USA - Niceville Plant (west) | Niceville | FL | — | ◐ LIKELY ACTIVE |
| RMReady Mix USA - Opelika Facility | Opelika | AL | — | ◐ LIKELY ACTIVE |
| RRRichmond Rmc Plant | Richmond | VA | — | ◐ LIKELY ACTIVE |
| RRRitchey's Redi Mix INC | Wray | CO | — | ◐ LIKELY ACTIVE |
| RCRiver City Concrete, INC - Waynesboro Plant | Waynesboro | TN | — | ◐ LIKELY ACTIVE |
| RBRl Brink CORP | Quincy | IL | — | ◐ LIKELY ACTIVE |
| RRRobertson's Ready Mix | San Diego | CA | — | ◐ LIKELY ACTIVE |
| RRRockingham Redi-mix - Front Royal Facility | Front Royal | VA | — | ◐ LIKELY ACTIVE |
| RRRockingham Redi- Mix INC - Charlottesville | Charlottesville | VA | — | ◐ LIKELY ACTIVE |
| RGRogers Group, INC. | Celina | TN | — | ◐ LIKELY ACTIVE |
| RGRogers Group, INC. Dba Dayton Concrete Plant | Dayton | TN | — | ◐ LIKELY ACTIVE |
| RRRogers Ready Mix 2 | Rogers | AR | — | ◐ LIKELY ACTIVE |
| RPRoss Prestressed Concrete CO | Bristol | TN | — | ◐ LIKELY ACTIVE |
| RPRoss Prestressed Concrete, INC | Knoxville | TN | — | ◐ LIKELY ACTIVE |
| RRR R Beasley Incorporated - Callao | Callao | VA | — | ◐ LIKELY ACTIVE |
| RSR & S Concrete | Madisonville | TN | — | ◐ LIKELY ACTIVE |
| RSR & S Concrete | Fresno | TX | — | ◐ LIKELY ACTIVE |
| RRR&t Redi Mix - 7355 Colorado 196 | Lamar 3.3 Mi. N of | CO | — | ◐ LIKELY ACTIVE |
| SPSabine Pass Lng LP - Sabine Pass Lng Import Terminal | Johnsons Bayou | LA | — | ◐ LIKELY ACTIVE |
| SCSaint Catherine Ready Mix Concrete Company INC | Natchez | MS | — | ◐ LIKELY ACTIVE |
| SCSalina Concrete Products | Salina | KS | — | ◐ LIKELY ACTIVE |
| SMSargent Materials | East Machias | ME | — | ◐ LIKELY ACTIVE |
| SBS B Cox - Doswell | Doswell | VA | — | ◐ LIKELY ACTIVE |
| SBS B Cox Ready Mix - Gloucester Plant | Gloucester | VA | — | ◐ LIKELY ACTIVE |
| SBS B Cox Ready Mix Incorporated - Anderson Hwy | Powhatan | VA | — | ◐ LIKELY ACTIVE |
| SCSeaford Concrete Products | Bridgeville | DE | — | ◐ LIKELY ACTIVE |
| SRSemo Ready Mix, INC. | Cape Girardeau | MO | — | ◐ LIKELY ACTIVE |
| SCSequatchie Concrete Service | Estill Springs | TN | — | ◐ LIKELY ACTIVE |
| SCSequatchie Concrete Service - Athens | Athens | TN | — | ◐ LIKELY ACTIVE |
| SCSequatchie Concrete Service INC | Madison | AL | — | ◐ LIKELY ACTIVE |
| SPServall Plant/erie | Erie | PA | — | ◐ LIKELY ACTIVE |
| SMShelby Materials Incorporated | Nashville | IN | — | ◐ LIKELY ACTIVE |
Sherman Industries Alexander City Plant | Alexander City | AL | — | ◐ LIKELY ACTIVE |
| SCSierra Concrete | Quincy | CA | — | ◐ LIKELY ACTIVE |