| SISelectcrete INC | Bakersfield | CA | — | ◇ UNVERIFIED |
| SSSelkirk Stone INC | Sandpoint | ID | — | ◇ UNVERIFIED |
| SCSelvage Concrete Products, INC | Santa Rosa | CA | — | ◇ UNVERIFIED |
| SPSeminole Precast Manufacturing, INC. | Macon | GA | — | ◇ UNVERIFIED |
| SCSemper Concrete Products | Butler | PA | — | ◇ UNVERIFIED |
| SBSeppi Brothers Concrete Products Corporation | Virginia | MN | — | ◇ UNVERIFIED |
| SCSequatchie Concrete Service INC | Madison | AL | — | ◇ UNVERIFIED |
| SCSequatchie Concrete Service, Inc-closed | Nashville | TN | — | ◇ UNVERIFIED |
| STSergio Tiscarreno Dba Bella Mouldings | Bell Gardens | CA | — | ◇ UNVERIFIED |
| SCSesser Concrete Products CO | Sesser | IL | — | ◇ UNVERIFIED |
| SBSeymore Bros, INC. | Altoona | PA | — | ◇ UNVERIFIED |
| SGS - G Concrete Company, Llc- Grantley Ave. Plant | Baltimore | MD | — | ◇ UNVERIFIED |
| SBShaffer Block & Concrete Products | Somerset | PA | — | ◇ UNVERIFIED |
| SSShannon Street Pre-cast Facility | Chesapeake | VA | — | ◇ UNVERIFIED |
| SESharper Edge | Kansas City | MO | — | ◇ UNVERIFIED |
| SCShea Concrete Production INC. | Nottingham | NH | — | ◇ UNVERIFIED |
| SCShea Concrete Products | Nottingham | NH | — | ◇ UNVERIFIED |
| SCSherman-dixie Concrete Industries INC | Glendale | KY | — | ◇ UNVERIFIED |
 Sherman Industries,inc. | Birmingham | AL | — | ◇ UNVERIFIED |
| SRSherman Ready Mix Concrete Co.(n.birmingham) | Birmingham | AL | — | ◇ UNVERIFIED |
| SSShondel's Stone Creations | Centerville | IA | — | ◇ UNVERIFIED |
| SCShope Concrete Products CO | Puyallup | WA | — | ◇ UNVERIFIED |
| SSShoreline Stone Manufacturing Carib, INC. | Largo | FL | — | ◇ UNVERIFIED |
| SCSierra Construction, INC. | Channelview | TX | — | ◇ UNVERIFIED |
| SPSierra Pacific | Oakland | CA | — | ◇ UNVERIFIED |
| SFSi Funeral Services | Saint Joseph | MO | — | ◇ UNVERIFIED |
| SASika Albuquerque | Albuquerque | NM | — | ◇ UNVERIFIED |
| SCSika Corperation | Riverside | CA | — | ◇ UNVERIFIED |
| SCSika Corporation | Conyers | GA | — | ◇ UNVERIFIED |
| SCSilver Creek Stoneworks INC | Rochester | MN | — | ◇ UNVERIFIED |
| SVSimerly Vaults, INC. | Knoxville | TN | — | ◇ UNVERIFIED |
| SSSims Stone CO. of Georgia, LLC | Woodbury | GA | — | ◇ UNVERIFIED |
| SSS.i. Shreveport Corporation | Shreveport | LA | — | ◇ UNVERIFIED |
| S3Skanska - 3 Mile Bridge Pre-cast Facility | Pensacola | FL | — | ◇ UNVERIFIED |
| SLSlabhaus LLC | Phoenix | AZ | — | ◇ UNVERIFIED |
| SHSlk Holdings LLC | Lincoln | NE | — | ◇ UNVERIFIED |
| SCSmith - Carolina Corporation | Reidsville | NC | — | ◇ UNVERIFIED |
| SCSmith Columbia Corporation | Hopkins | SC | — | ◇ UNVERIFIED |
| SGSmith Garden Center & Landscaping INC. | Macomb | IL | — | ◇ UNVERIFIED |
| SCSmiths Concrete Products Incorporated | Bishopville | SC | — | ◇ UNVERIFIED |
| SRSmyrna Ready Mix Concrete | Lewisburg | TN | — | ◇ UNVERIFIED |
| SRSmyrna Ready Mix - Portable Ready Mix 2 | Colorado Springs | CO | — | ◇ UNVERIFIED |
| SBSnyder Brick and Block | Columbus | OH | — | ◇ UNVERIFIED |
| SBSnyder Brick & Block | Dayton | OH | — | ◇ UNVERIFIED |
| SESolar Erectors U.s. INC. | Doral | FL | — | ◇ UNVERIFIED |
| SBSouth Bay Concrete Design LLC | Sayville | NY | — | ◇ UNVERIFIED |
| SCSoutheast Construction Products, INC. | Daytona Beach | FL | — | ◇ UNVERIFIED |
| SPSoutheastern Pipe & Precast INC | Cantonment | FL | — | ◇ UNVERIFIED |
| SPSoutheastern Prestressed Concrete INC | West Palm Beach | FL | — | ◇ UNVERIFIED |
| SSSoutheast Stone Restoration, LLC | Orlando | FL | — | ◇ UNVERIFIED |
