| SHSt. Henry Tile Co., INC. | Greenville | OH | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SSStockman Stoneworks* | Jefferson City | MO | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| STSuncoast Tampa Bay Block Turkey Creek Facility | Plant City | FL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SCSuncore Construction & Materials, INC. -st. George Masonry | Saint George | UT | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SMSuncore Masonry Bluffdale Plant | Riverton | UT | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SCSuperior Concrete Block Company | Mankato | MN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SCSuperior Concrete Fence of Texas, Inc. | Euless | TX | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| SBSuperlite Block | Needles | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TSTarpon Springs Block Plant | Tarpon Springs | FL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TBTcc Borgert | Saint Joseph | MN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TMTcc Materials Companies | Mendota Heights | MN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| THTDN Holdings, LLC | Haines City | FL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TITecho-bloc Incorporated | Pen Argyl | PA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TMTecho-bloc Midwest CORP. | Rock Island | IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TFTest Facility 69 Revised | Fort Wayne | IN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TFThe Fagenstrom CO | Great Falls | MT | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TLThe Lane Construction Crafton | Pittsburgh, Pa | PA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TQThe Quikrete Companies | San Diego | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TTThe Turner Company | Rhome | TX | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TBTiffany Brick - Ogden Plant | Schertz | TX | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TBTitan Block | Frederiksted | VI | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TFTitan Florida-canal Street | Fort Myers | FL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| TBTompkinsville Block CO | Tompkinsville | KY | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TBTop Block, LLC | Norfolk | NE | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TITranschem INC | Carlsbad | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TDTri Delta a Division of Superlite | North Las Vegas | NV | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TLTri-krete Limited | Poughkeepsie | NY | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| UBUnited Block CO. | Chicora | PA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| UUnknown | Miami | FL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| USUtilities Structures | Fort Myers | FL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| VMVulcan Materials Company, Florida Rock Division | Kissimmee | FL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| WMWa317935881 - Mutual Materials Company | Kent | WA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| WMWa317937176 - Mutual Materials Company | Mica | WA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| WUWa317941422 - Ultrablock INC | Vancouver | WA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| WPWa317942930 - Precast By Design INC | Elk | WA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| WCWatkins Concrete Block CO | Omaha | NE | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| WSWestern States Wholesale INC Dba Patio Industries | Ontario | CA | Nonmetallic Mineral Product Manufacturing327310 | — | ◇ UNVERIFIED |
| WCWhite Cap Ready Mix INC | Portola | CA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| WRWhite Research & Development INC | Irmo | SC | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| WGWillamette Graystone LLC | Albany | OR | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| WGWillamette Graystone - Springfield, Or Tank | Springfield | OR | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| WBWillcutt Block and Supply Company of Tuscaloosa, INC. | Tuscaloosa | AL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| YLYardBlox LLC | Springville | UT | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| ZCZygrove Corporation | Mound | MN | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
