| CMC-e Minerals Plant 2 | Andersonville | GA | — | ◇ UNVERIFIED |
| CMC-e Minerals Plants 1,2 and 6 | Andersonville | GA | — | ◇ UNVERIFIED |
| CSCherokee Sanford Group INC | Sanford | NC | — | ◇ UNVERIFIED |
| CSCherokee Sanford Group L L C Lee County | Sanford | NC | — | ◇ UNVERIFIED |
| CSCherokee Sanford Group LLC Plant 34 | Burlington | NC | — | ◇ UNVERIFIED |
| CFChicago Fire Brick CO | Chicago | IL | — | ◇ UNVERIFIED |
| CPChrystaphase Products | Spring | TX | — | ◇ UNVERIFIED |
| CNClayburn - New Savage Works | Grantsville | MD | — | ◇ UNVERIFIED |
| CCClay Concepts LLC | Marshall | TX | — | ◇ UNVERIFIED |
| CCClover Creek Brick CO | Cloverport | KY | — | ◇ UNVERIFIED |
| CBColonial Brick Corporation | Cayuga | IN | — | ◇ UNVERIFIED |
| CTConroe Technology Center | Conroe | TX | — | ◇ UNVERIFIED |
| CMCore Metals Group LLC (mpm Facility) | Aurora | IN | — | ◇ UNVERIFIED |
| CRCorhart Refractories | Louisville | KY | — | ◇ UNVERIFIED |
| COCounty of San Diego Department of General Services | Lemon Grove | CA | — | ◇ UNVERIFIED |
| CICrossville INC | Dickson | TN | — | ◇ UNVERIFIED |
| CCCrystal Crk Ceramic Tile | Dallas | TX | — | ◇ UNVERIFIED |
| CBCunningham Brick Company INC. | Thomasville | NC | — | ◇ UNVERIFIED |
| CBCunningham Brick Company Incorporated | Kings Mountain | NC | — | ◇ UNVERIFIED |
| DCDal-tile CORP | Lewisport | KY | — | ◇ UNVERIFIED |
| DCDal-tile CORP Bendersville Plant | Bendersville | PA | — | ◇ UNVERIFIED |
| DCDal-tile CORP Jackson Mfg | Jackson | TN | — | ◇ UNVERIFIED |
| DCDal-tile Corporation | Olean | NY | — | ◇ UNVERIFIED |
| DTDal Tile Gettysburg Boro Plt | Gettysburg | PA | — | ◇ UNVERIFIED |
| DBDarlington Brick & Clay/darlington | Darlington | PA | — | ◇ UNVERIFIED |
| DCDeleo Clay Tile CO INC | Lake Elsinore | CA | — | ◇ UNVERIFIED |
| DBDesign By Built to Last INC | Venice | FL | — | ◇ UNVERIFIED |
| DCDfc Ceramics | Canon City | CO | — | ◇ UNVERIFIED |
| DCD'hanis Clay Products INC | D'hanis | TX | — | ◇ UNVERIFIED |
| DODL Operations LLC | Indianapolis | IN | — | ◇ UNVERIFIED |
| ECEi Ceramics LLC (1431404130) | Cincinnati | OH | — | ◇ UNVERIFIED |
| ESElementis Specialties INC | Newberry Springs | CA | — | ◇ UNVERIFIED |
| EPElgin Plant | Elgin | TX | — | ◇ UNVERIFIED |
| EGEmhart Glass Holding INC | Owensville | MO | — | ◇ UNVERIFIED |
| EFEPS Fabricators LLP | Plymouth | MN | — | ◇ UNVERIFIED |
 Fast Global Solutions INC. | Auburn | NE | — | ◇ UNVERIFIED |
| FBFlorida Brick & Clay CO INC | Plant City | FL | — | ◇ UNVERIFIED |
 Florida Tile INC | Shannon | GA | — | ◇ UNVERIFIED |
| Florida Tile INC | Lawrenceburg | KY | — | ◇ UNVERIFIED |
| Florida Tile Industries, INC. | Lakeland | FL | — | ◇ UNVERIFIED |
| FRForterra Roof Tile INC | Fort Myers | FL | — | ◇ UNVERIFIED |
| FTFuzion Tech/freeport Brick Div | Freeport | PA | — | ◇ UNVERIFIED |
| FTFuzion Tech/kittanning Brick Div | Adrian | PA | — | ◇ UNVERIFIED |
| GPGarrison Plant | Garrison | TX | — | ◇ UNVERIFIED |
| GCGeneral Clay Products CORP | Logan | OH | — | ◇ UNVERIFIED |
| GCGeneral Clay Products CORP | Nelsonville | OH | — | ◇ UNVERIFIED |
| GCGeneral Clay Products Plant No 5 | Wadsworth | OH | — | ◇ UNVERIFIED |
| GSGeneral Shale | Atkins | VA | — | ◇ UNVERIFIED |
| GSGeneral Shale Brick | Fairdale | KY | — | ◇ UNVERIFIED |
| GSGeneral Shale Brick INC | Mooresville | IN | — | ◇ UNVERIFIED |
