| SPSealy Plant | Sealy | TX | 20–99 | ◐ 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 | Columbia | TN | — | ◐ LIKELY ACTIVE |
| SCSequatchie Concrete Service | Chattanooga | 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 |
| 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 |
| SCShope Concrete LLC | Puyallup | WA | — | ◐ LIKELY ACTIVE |
| SASika Albuquerque | Albuquerque | NM | — | ◐ 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 |
| SMSJB Masonry - Precast | Willmar | MN | 1–19 | ◐ LIKELY ACTIVE |
| SRSkagit Ready Mix Mcfarland Road | Mount Vernon | WA | — | ◐ LIKELY ACTIVE |
| SBSmall Batch Concrete LLC | Louisville | KY | — | ◐ LIKELY ACTIVE |
Smith-Midland Corporation (South Carolina) | Hopkins | SC | 20–99 | ◐ 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 | Hermitage | TN | — | ◐ LIKELY ACTIVE |
| SRSmyrna Ready Mix Concrete, LLC | South Pittsburg | 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 |
| SCSoto Concrete | Sun Valley | CA | — | ◐ LIKELY ACTIVE |
| SASouth Alabama Concrete | Troy | AL | — | ◐ LIKELY ACTIVE |
| SCSoutheastern Concrete Company Inc, Plant Number 5 | Hattiesburg | MS | — | ◐ LIKELY ACTIVE |
| SPSoutheastern Pipe & Precast INC | Cantonment | FL | — | ◐ LIKELY ACTIVE |
| SCSouthern Concrete Products INC | Murray | KY | — | ◐ LIKELY ACTIVE |
| SCSouthern Concrete Products of Lexington | Lexington | TN | 1–19 | ◐ LIKELY ACTIVE |
| SCSouthern Concrete Products of Paris | Paris | TN | 20–99 | ◐ LIKELY ACTIVE |
| SISouthland International Trucks | Huntsville | AL | — | ◐ LIKELY ACTIVE |
| SRSouthland Ready Mix Inc, Blue Mountain Facility | Blue Mountain | MS | — | ◐ LIKELY ACTIVE |
| SRSouthland Ready Mix Inc, Corinth Facility | Corinth | MS | — | ◐ LIKELY ACTIVE |
| SCSouthside Concrete Supply LLC | Blairs | VA | — | ◐ LIKELY ACTIVE |
| SCSrm - Charleston #706 | Johns Island | SC | — | ◐ LIKELY ACTIVE |
| SCSrm Concrete - Chester | Chesterfield | VA | — | ◐ LIKELY ACTIVE |
| SCSrm Concrete-dinwiddie | Petersburg | VA | — | ◐ LIKELY ACTIVE |
| SGSrm - Goose Creek #707 | Goose Creek | SC | — | ◐ LIKELY ACTIVE |
| SCStabil Concrete Products, LLC | Sarasota | FL | — | ◐ LIKELY ACTIVE |
| SCStandard Concrete Products - Tampa | Tampa | FL | 20–99 | ◐ LIKELY ACTIVE |
| SRStar Ranch Enterprises INC - Section 2 Farm | South Bay | FL | — | ◐ LIKELY ACTIVE |
| SRState Ready Mix - a Calportland Company | Oxnard | CA | 20–99 | ◐ LIKELY ACTIVE |
| SCStavola Construction Materials INC | Bridgewater | NJ | — | ◐ LIKELY ACTIVE |
| SPSteps Plus, INC. | Syracuse | NY | 1–19 | ◐ LIKELY ACTIVE |
| SPSti Precast | Leominster | MA | — | ◐ LIKELY ACTIVE |
| SCStone & CO INC Canonsburg Plt | Canonsburg | PA | — | ◐ LIKELY ACTIVE |
| SMStrittmatter Materials, LLC Dba D.c. Materials | Hyattsville | MD | — | ◐ LIKELY ACTIVE |
| SRStrong Ready Mix | Abilene | TX | 20–99 | ◐ LIKELY ACTIVE |
| STS T Wooten Corporation - Plant No 3 | Wilsons Mills | NC | — | ◐ LIKELY ACTIVE |
| STS T Wooten Corporation - Winterville | Winterville | NC | — | ◐ LIKELY ACTIVE |
| SCSummers Concrete Contracting, INC. Plant 450 | Kinston | NC | — | ◐ LIKELY ACTIVE |
| SSSunset Stone | Castle Rock | CO | 20–99 | ◐ LIKELY ACTIVE |
| SPSuperior Paving Corporation - Centreville Plant | Centreville | VA | — | ◐ LIKELY ACTIVE |
| SRSuperior Ready Mix Incorporated | Lebanon | MO | — | ◐ LIKELY ACTIVE |
| SESurface Elements, INC. | Saint Joseph | TN | — | ◐ LIKELY ACTIVE |
| TITampa International Airport Concrete Batch Plant | Tampa | FL | — | ◐ LIKELY ACTIVE |
| TMTcc Materials | Bow | NH | — | ◐ LIKELY ACTIVE |
| TMTcs Materials LLC – Magnolia Suffolk | Suffolk | VA | — | ◐ LIKELY ACTIVE |
| TMTcs Materials Llc/vulcan Materials CO - Chesapeake | Chesapeake | VA | — | ◐ LIKELY ACTIVE |
| TMTcs Materials - Williamsburg | Williamsburg | VA | — | ◐ LIKELY ACTIVE |
| TRTerminal Ready Mix INC | Lorain | OH | — | ◐ LIKELY ACTIVE |
| TVTerra Vaults | Gainesville | TX | 20–99 | ◐ LIKELY ACTIVE |
| TITexas Industries | Dallas | TX | 1–19 | ◐ LIKELY ACTIVE |
| TRThayer Redi Mix | Thayer | MO | — | ◐ LIKELY ACTIVE |
| TBThe Bauer Company INC. | Worthington | PA | 20–99 | ◐ LIKELY ACTIVE |
| TRThe Reinforced Earth | Waco | TX | — | ◐ LIKELY ACTIVE |
| TWThe Wells Group LLC | Flemingsburg | KY | — | ◐ LIKELY ACTIVE |
| TWThe Wells Group LLC | West Liberty | KY | — | ◐ LIKELY ACTIVE |
| TWThe Wells Group LLC | Norton | VA | — | ◐ LIKELY ACTIVE |
| TWThe Wells Group LLC | Wurtland | KY | — | ◐ LIKELY ACTIVE |
| TWThe Wells Group LLC | Vanceburg | KY | — | ◐ LIKELY ACTIVE |
| TWThe Wells Group LLC - Concrete Supplier | Ashland | KY | — | ◐ LIKELY ACTIVE |
| TCThomas Concrete Bartow Plant #2400 | Cartersville | GA | — | ◐ LIKELY ACTIVE |
| TCThomas Concrete of Carolina, INC. -denver Plant | Denver | NC | — | ◐ LIKELY ACTIVE |
| TCThomas Concrete of Georgia - Cartersville | Cartersville | GA | — | ◐ LIKELY ACTIVE |