| SMSouthland Mixer Service, INC | Adelanto | CA | — | ◇ UNVERIFIED |
| SRSouthland Ready Mix Inc, Blue Mountain Facility | Blue Mountain | MS | — | ◇ UNVERIFIED |
| SRSouthland Ready Mix Inc, Corinth Facility | Corinth | MS | — | ◇ UNVERIFIED |
| SPSouthmont Plant | Montgomery | AL | — | ◇ UNVERIFIED |
| SSSouth Shore Slag LLC - Contractor of Uss Gary Works (00121) | Gary | IN | — | ◇ UNVERIFIED |
| SCSouthside Concrete Supply LLC | Blairs | VA | — | ◇ UNVERIFIED |
| SRSouthside Red-e-mix LLC | Knob Noster | MO | — | ◇ UNVERIFIED |
| STSouth Towne Concrete Products INC | Keithville | LA | — | ◇ UNVERIFIED |
| SVSouth Valley Materials INC | Coalinga | CA | — | ◇ UNVERIFIED |
| SVSouth Valley Materials INC | Exeter | CA | — | ◇ UNVERIFIED |
| SVSouth Valley Materials INC | Hanford | CA | — | ◇ UNVERIFIED |
| SVSouth Valley Materials INC | Tulare | CA | — | ◇ UNVERIFIED |
| SVSouth Valley Materials, INC | Porterville | CA | — | ◇ UNVERIFIED |
| SVSouth Valley Materials, INC. | Corcoran | CA | — | ◇ UNVERIFIED |
| SVSouth Valley Materials Inc-bakersfield Rmc | Bakersfield | CA | — | ◇ UNVERIFIED |
| SWSouth Weber | South Weber | UT | — | ◇ UNVERIFIED |
| SCSouthwest Concrete CORP Cargo Street Ready Mix Plant | Fort Myers | FL | — | ◇ UNVERIFIED |
| SWSouth West Concrete Products | Ontario | CA | — | ◇ UNVERIFIED |
| SRSouthwest Readymix | Alamosa | CO | — | ◇ UNVERIFIED |
| SRSouthwest Ready Mix (portable) | Portable | KS | — | ◇ UNVERIFIED |
| SRSouthwest Ready Mix - Portable Concrete | Lawton | OK | — | ◇ UNVERIFIED |
| SFSpanish Fork Ready Mix Concrete | Spanish Fork | UT | — | ◇ UNVERIFIED |
| SCSparks Concrete | Port Orange | FL | — | ◇ UNVERIFIED |
| SBSparta Block & Tank Supply | Sparta | TN | — | ◇ UNVERIFIED |
| SMSpecialty Minerals (at Madison Paper) | Madison | ME | — | ◇ UNVERIFIED |
| SMSpecialty Minerals INC | Zachary | LA | — | ◇ UNVERIFIED |
| SMSpecialty Minerals INC | Ashdown | AR | — | ◇ UNVERIFIED |
| SVSpecialty Vermiculite CORP | Enoree | SC | — | ◇ UNVERIFIED |
| SRSpeedway Redi Mix Incorporated | Garrett | IN | — | ◇ UNVERIFIED |
| STSpeedway Transit Mix | Angola | IN | — | ◇ UNVERIFIED |
| STSpeedway Transit Mix and Concrete Plant Management Incorporated | New Haven | IN | — | ◇ UNVERIFIED |
| SCSpencer Concrete Service INC | Fairdale | KY | — | ◇ UNVERIFIED |
| SHSpencer's Hwy 53 Ready Mix | Poplar Bluff | MO | — | ◇ UNVERIFIED |
| SCSpinks Clay Company - Gleason Plant | Gleason | TN | — | ◇ UNVERIFIED |
| SWSpn Well Services - Fort Lupton Facility | Fort Lupton Area | CO | — | ◇ UNVERIFIED |
| SRSport Redi-mix LLC | Tilton | IL | — | ◇ UNVERIFIED |
| SRSport Redi-mix LLC | Ogden | IL | — | ◇ UNVERIFIED |
| SRSport Redi-mix LLC | Goodfield | IL | — | ◇ UNVERIFIED |
| SRSport Redi-mix LLC | Champaign | IL | — | ◇ UNVERIFIED |
| SRSport Redi-mix LLC | Rantoul | IL | — | ◇ UNVERIFIED |
| SRSpragues' Rock and Sand CO | Simi Valley | CA | — | ◇ UNVERIFIED |
| SRSpragues' Rock and Sand Company | Irwindale | CA | — | ◇ UNVERIFIED |
| SCSpring Creek | Minster | OH | — | ◇ UNVERIFIED |
| SCSpring Creek | Sidney | OH | — | ◇ UNVERIFIED |
| SCSpring Creek Materials, INC - Salem Redi-mix, LLC | Salem | AR | — | ◇ UNVERIFIED |
| SCSpring Creek Site | Spring Creek | NV | — | ◇ UNVERIFIED |
| SRSpringdale Ready Mix 2-oak | Springdale | AR | — | ◇ UNVERIFIED |
| SRSpringfield Ready Mix-springfield Ready Mix | Springfield | MO | — | ◇ UNVERIFIED |
| SRSpring Rmc Plant | Spring | TX | — | ◇ UNVERIFIED |
| SSSpring Street Service | Paso Robles | CA | — | ◇ UNVERIFIED |