| RCRoanoke Cement Company | Winston Salem | NC | — | ◐ LIKELY ACTIVE |
| RRRobertson Ready Mix | Winfield | AL | — | ◐ LIKELY ACTIVE |
| RARockingham Asphalt INC - Harrisonburg | Harrisonburg | VA | — | ◐ LIKELY ACTIVE |
| RRRockingham Redi-mix - Blacksburg Facility | Blacksburg | VA | — | ◐ LIKELY ACTIVE |
| RRRockingham Redi-mix - Boyd Tavern Facility | Troy | VA | — | ◐ LIKELY ACTIVE |
| RRRockingham Redi-mix - Charlottesville Facility | Charlottesville | VA | — | ◐ LIKELY ACTIVE |
| RRRockingham Redi-mix - Fishersville Facility | Waynesboro | VA | — | ◐ LIKELY ACTIVE |
| RRRockingham Redi-mix - Garbers Church Facility | Harrisonburg | VA | — | ◐ LIKELY ACTIVE |
| RRRockingham Redi-mix - Lexington Facility | Lexington | VA | — | ◐ LIKELY ACTIVE |
| RRRockingham Redi-mix - Pulaski Facility | Pulaski | VA | — | ◐ LIKELY ACTIVE |
| RMRocky Mountain Ready Mix Concrete, Incorporated | Brighton | CO | — | ◐ LIKELY ACTIVE |
| RMRocky Mount Ready Mix Concrete INC | Rocky Mount | VA | — | ◐ LIKELY ACTIVE |
| RCRocla Concrete Tie Inc-Pueblo | Pueblo | CO | 20–99 | ◐ LIKELY ACTIVE |
| RLRoofblok Limited | Gardner | MA | — | ◐ LIKELY ACTIVE |
| RRRost Ready Mix | Marshfield | MO | 20–99 | ◐ LIKELY ACTIVE |
| RSRoyal Stone LLC | Williamston | MI | 20–99 | ◐ LIKELY ACTIVE |
| RSRp Smith & Son INC | Succasunna | NJ | — | ◐ LIKELY ACTIVE |
| RBRw Busse Excavating | Grand Lake | CO | — | ◐ LIKELY ACTIVE |
| SDSaltillo Division of B and B Concrete Company INC | Saltillo | MS | — | ◐ LIKELY ACTIVE |
| SBSan Bernardino Plant 12 | San Bernardino | CA | 1–19 | ◐ LIKELY ACTIVE |
| SFSanta Fe Fee H Tb Swdw #12 Facility | Marksville | LA | — | ◐ LIKELY ACTIVE |
| SRSantee Redi Mix | Moncks Corner | SC | — | ◐ LIKELY ACTIVE |
| SBS B Cox Concrete | Sandston | VA | — | ◐ LIKELY ACTIVE |
| SBS B Cox Ready Mix INC - Chesapeake Plant | Chesapeake | VA | — | ◐ LIKELY ACTIVE |
| SBS B Cox Ready Mix INC - Goochland Plant | Rockville | VA | — | ◐ LIKELY ACTIVE |
| SBS B Cox Ready Mix-nottoway Plant | Blackstone | VA | — | ◐ LIKELY ACTIVE |
| SCSchreiter Concrete | Wright City | MO | — | ◐ LIKELY ACTIVE |
| SCSchreiter Concrete CO. | Wright City | MO | 20–99 | ◐ LIKELY ACTIVE |
| SCSchuster Concrete Ready Mix - Cp18 | Alexandria | VA | — | ◐ LIKELY ACTIVE |
| SCSchuster Concrete Ready Mix - Kalahari | Woodford | VA | — | ◐ LIKELY ACTIVE |
| SCScranton Craftsmen Incorporated | Throop | PA | 20–99 | ◐ LIKELY ACTIVE |
| SCScruggs Concrete Company | Madison | FL | — | ◐ LIKELY ACTIVE |
| SIScurlock Industries of Springfield-springfiled | Springfield | MO | — | ◐ LIKELY ACTIVE |
| 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 |
| SBSessler Building Materials Inc dba Barnes & Cone | Syracuse | NY | 20–99 | ◐ 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 | South Pittsburg | TN | — | ◐ 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 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 |
| SRSoil Retention Products INC | Perris | CA | 20–99 | ◐ 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 |
| SCSoutheastern Concrete Products Columbia | Columbia | SC | 1–19 | ◐ 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 |