| SASan Angelo 2 | San Angelo | TX | — | ◇ UNVERIFIED |
| SASan Angelo Ready Mix Plant | San Angelo | TX | — | ◇ UNVERIFIED |
| SISandco INC | Durango | CO | — | ◇ UNVERIFIED |
| SCSandidge Concrete - Jefferson City | Jefferson City | MO | — | ◇ UNVERIFIED |
| SASanford Airport Temporary Batch Plant | Sanford | FL | — | ◇ UNVERIFIED |
| SFSan Francisco (a) | San Francisco | CA | — | ◇ UNVERIFIED |
| SXSan Xavier Rock & Materials - Cortaro Plant #23 | Tucson | AZ | — | ◇ UNVERIFIED |
| SBS B Cox Incorporated - Powhatan | Powhatan | VA | — | ◇ UNVERIFIED |
| SBS B Cox Ready Mix INC Doswell Plant | Doswell | VA | — | ◇ UNVERIFIED |
| SCScc Concrete INC | Lopatcong | NJ | — | ◇ UNVERIFIED |
| SRSchaaf Redi Mix | Atkinson | NE | — | ◇ UNVERIFIED |
| STSchlumberger Technology Corporation | Grand Junction | CO | — | ◇ UNVERIFIED |
| SSSchrey Systems INC | Newton | IL | — | ◇ UNVERIFIED |
| SCSchuster Concrete Ready Mix Llc-guilford Rd | Jessup | MD | — | ◇ UNVERIFIED |
| SCSchuster Concrete Ready Mix Llc-hobbs Rd | Denton | MD | — | ◇ UNVERIFIED |
| SCSchuster Concrete Ready Mix Llc-southlawn Ln | Rockville | MD | — | ◇ UNVERIFIED |
| SCSchuster Concrete Ready Mix - One Logistics | Winchester | VA | — | ◇ UNVERIFIED |
| SDSchuster, Daniel, INC. | Owings Mills | MD | — | ◇ UNVERIFIED |
| SPScottsboro Plant | Scottsboro | AL | — | ◇ UNVERIFIED |
| SCScott's Concrete Camdenton | Camdenton | MO | — | ◇ UNVERIFIED |
| SPSc Prestress Kingstree | Kingstree | SC | — | ◇ UNVERIFIED |
| SPSc Prestress Lakecity | Lake City | SC | — | ◇ UNVERIFIED |
| SCScrap Central INC | Omaha | NE | — | ◇ UNVERIFIED |
| SCSebewaing Concrete Prod INC | Sebewaing | MI | — | ◇ UNVERIFIED |
| SASebring Airport Temporary Ready Mix Plant | Orlando | FL | — | ◇ UNVERIFIED |
| SCSe Concrete INC | Kingston | MA | — | ◇ UNVERIFIED |
| S0See 041-0231-03 Pete Lien & Sons | Colorado Springs | CO | — | ◇ UNVERIFIED |
| SRSega Redi-mix | Waterbury | CT | — | ◇ UNVERIFIED |
| SCSei Concrete - Clay CO Facility | Manchester | KY | — | ◇ UNVERIFIED |
| SCSelect Concrete CO. LLC | Star City | AR | — | ◇ UNVERIFIED |
| SBSeminole Bp | Seminole | OK | — | ◇ UNVERIFIED |
| SOSemo Operating Company | Advance | MO | — | ◇ UNVERIFIED |
| STSenter Transit Mix Division of Concrete Industries INC | Tupelo | MS | — | ◇ UNVERIFIED |
| SBSeptember Bloom, INC | Mcminnville | TN | — | ◇ UNVERIFIED |
| SCSequatchie Concrete Service - Dayton | Dayton | TN | — | ◇ UNVERIFIED |
| SCSequatchie Concrete Service, Inc-closed | Nashville | TN | — | ◇ UNVERIFIED |
| SCSequatchie Concrete Service Inc, Helen of Troy Site | Olive Branch | MS | — | ◇ UNVERIFIED |
| SCSequatchie Concrete Service, INC. - Scottsboro Plant | Scottsboro | AL | — | ◇ UNVERIFIED |
| SCSequatchie Concrete Services, INC. | Harriman | TN | — | ◇ UNVERIFIED |
| SLService Lumber Company | Rolling Fork | MS | — | ◇ UNVERIFIED |
| SRService Rock Products | Barstow | CA | — | ◇ UNVERIFIED |
| SRService Rock Products INC 4th St | Henderson | NV | — | ◇ UNVERIFIED |
| SRService Rock Products INC. - Beesley Nv | Las Vegas | NV | — | ◇ UNVERIFIED |
| SRService Rock Products INC Lone Mountain Nv Facility | Las Vegas | NV | — | ◇ UNVERIFIED |
| SRService Rock Products INC Sloan | Las Vegas | NV | — | ◇ UNVERIFIED |
| SRService Rock Products - Pahrump Plant | Pahrump | NV | — | ◇ UNVERIFIED |
| SCS&g Concrete Company | Odenton | MD | — | ◇ UNVERIFIED |
| SCS&g Concrete Edgewood | Edgewood | MD | — | ◇ UNVERIFIED |
| SGS & G Prestress Company | Wilmington | NC | — | ◇ UNVERIFIED |
| SCShamrock Concrete CO. | La Vista | NE | — | ◇ UNVERIFIED |