| RPRoss Prestressed Concrete, INC | Knoxville | TN | — | ◐ LIKELY ACTIVE |
| RRR R Beasley Incorporated - Callao | Callao | VA | — | ◐ LIKELY ACTIVE |
| RSR & S Concrete | Fresno | TX | — | ◐ LIKELY ACTIVE |
| RSR & S Concrete | Madisonville | TN | — | ◐ 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 |
| SKSafety Kleen Systems, INC. | N Las Vegas | NV | — | ◐ 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 |
| SSSavage Safe Handling | Auburn | 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 |
| SPSekisui Polymatech America LLC | Calvert City | KY | — | ◐ 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 |
| 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 |
| SESiouxland Energy Cooperative | Hudson | SD | — | ◐ LIKELY ACTIVE |
| SCSmith Concrete Company - Charleston Plant | Charleston | WV | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete | Richmond | VA | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete LLC | Gallatin | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete, LLC | Nashville | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete, LLC - Blount County Plant #48 | Louisville | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete, LLC Dba Dunlap Plant Crusher | Dunlap | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete LLC Dba Shelbyville Plant | Shelbyville | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete, LLC - La Vergne Plant 14a & 14b | La Vergne | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete, LLC Plant 15020 | Cedar Bluff | AL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete LLC - Plant 207 | Bardstown | KY | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete LLC Plant 231 | Sparta | KY | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete Llc- Plant No. 15/plant No. 15b | Lebanon | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete LLC - Spencer Mill Road, Bon Aqua | Bon Aqua | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete LLC - Srm Plant #125 | Panama City | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete LLC - Srm Plant #167, 168 169 | Fort Myers | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete, Llc- Wildwood Plant | Wildwood | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete/shenango Twp | W. Middlesex | PA | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix East Trail Batch Plant | Naples | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix - Plant #103 | Tallahassee | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix - Plant # 104 | Tallahassee | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix - Plant #128 | Fort Walton Beach | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix - Plant #145 | Panacea | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix - Williston Ready Mix Plant | Williston | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrn Ready Mix Concrete, LLC - Smr Plant 124 | Perry | FL | — | ◐ LIKELY ACTIVE |
| SRSolid Rock Concrete | Russellville | MO | — | ◐ LIKELY ACTIVE |
| SCSouthern Concrete Materials, INC. - Waynesville | Waynesville | NC | — | ◐ LIKELY ACTIVE |