| SCSchuster Concrete Ready Mix - Cp18 | Alexandria | VA | — | ◐ LIKELY ACTIVE |
| SCSchuster Concrete Ready Mix - Kalahari | Woodford | VA | — | ◐ LIKELY ACTIVE |
| SCScruggs Concrete Company | Madison | FL | — | ◐ LIKELY ACTIVE |
| SPSealy Plant | Sealy | TX | 20–99 | ◐ LIKELY ACTIVE |
| SPSeaport Portland Terminal | Portland | OR | — | ◐ LIKELY ACTIVE |
| SOSemo Operating Company | Cape Girardeau | MO | — | ◐ LIKELY ACTIVE |
| SOSemo Operating Company | Bragg City | MO | — | ◐ LIKELY ACTIVE |
| SRSemo Ready Mix | Sikeston | MO | — | ◐ LIKELY ACTIVE |
| SRSemo Ready Mix | Marston | MO | — | ◐ LIKELY ACTIVE |
| SRSemo Ready Mix, INC. | Cape Girardeau | MO | — | ◐ LIKELY ACTIVE |
| SBSeptember Bloom Ready Mix Concrete Plant | Mcminnville | TN | — | ◐ LIKELY ACTIVE |
| SCSequatchie Concrete Service | Chattanooga | TN | — | ◐ LIKELY ACTIVE |
| SCSequatchie Concrete Service | Columbia | TN | — | ◐ LIKELY ACTIVE |
| SRSe Ready Mix - Okeechobee Commerce Park | Okeechobee | FL | — | ◐ LIKELY ACTIVE |
| SQSFO Quikrete | Fremont | CA | 20–99 | ◐ LIKELY ACTIVE |
| SQSGF Quikrete | Springfield | MO | 1–19 | ◐ LIKELY ACTIVE |
| SOShell Oil Products US Van Nuys Terminal | Van Nuys | CA | — | ◐ LIKELY ACTIVE |
| SLShelly Liquid Division | Gallipolis | OH | — | ◐ LIKELY ACTIVE |
| SMShelly Materials, Inc. - Medina Supply Company | Medina | OH | 20–99 | ◐ LIKELY ACTIVE |
Sherman Industries LLC Gardendale Plant | Birmingham | AL | — | ◐ LIKELY ACTIVE |
Sherman Industries LLC Sylacauga | Sylacauga | AL | — | ◐ LIKELY ACTIVE |
Sherman Industries - Trussville Plant | Trussville | AL | — | ◐ LIKELY ACTIVE |
| SPShockey Precast - Winchester Facility | Winchester | VA | — | ◐ LIKELY ACTIVE |
| SCSilvi Concrete Morrisville Plt | Fairless Hills | PA | — | ◐ LIKELY ACTIVE |
| SCSilvi Concrete of South Plainfield INC. | South Plainfield | NJ | — | ◐ LIKELY ACTIVE |
| SCSilvi Concrete South - Apex Plant | Apex | NC | — | ◐ LIKELY ACTIVE |
| SBSims Bark CO of Georgia LLC | Bowman | SC | — | ◐ LIKELY ACTIVE |
| SOSitemix of Alabama | Dadeville | AL | — | ◐ LIKELY ACTIVE |
| SRSkagit Ready Mix Mcfarland Road | Mount Vernon | WA | — | ◐ LIKELY ACTIVE |
| SBSmall Batch Concrete LLC | Louisville | KY | — | ◐ LIKELY ACTIVE |
| SMSmith's Materials - Concrete Batch Plant | Dolores 2.3 Mi. Sw of | CO | — | ◐ LIKELY ACTIVE |
| SRSmith's Ready Mix, INC | Arkadelphia | AR | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix | Smyrna | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix - Arvada Mix Plant | Arvada Area | CO | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Batch Plant - Baldwin | Baldwin | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Batch Plant Sjc | Saint Augustine | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Cocoa Cbp | Cocoa | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete, LLC | Madison | AL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete, LLC | South Pittsburg | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete, LLC | Hermitage | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete LLC Dba Crossville Plant | Crossville | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete LLC - Plant 260 | Bowling Green | KY | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete LLC - Plant 261 | Franklin | KY | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete, LLC - Spring Hill Plant #25 B | Spring Hill | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete LLC - Srm Plant #123 | Lloyd | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete, LLC - Srm Plant #15450 Alico | Fort Myers | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete LLC - Srm Plant #15470 Alico | Fort Myers | FL | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix, LLC | Winchester | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix, Plant 19 | Centerville | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Plant #203 | Brooks | KY | — | ◐ LIKELY ACTIVE |