| ABAcme Brick-weir Plant | Weir | KS | — | ◇ UNVERIFIED |
| APAcme-ochs Plant | Springfield | MN | — | ◇ UNVERIFIED |
| ARAdvanced Refractory Technologies | Carnegie | PA | — | ◇ UNVERIFIED |
| AIAlliance Industries INC - Waupaca - Vaughn Road | Waupaca | WI | — | ◇ UNVERIFIED |
 Allied Mineral Products | Anniston | AL | — | ◇ UNVERIFIED |
| ARAlsey Refractories CO | Alsey | IL | — | ◇ UNVERIFIED |
| ABAmerican Bullnose Company of Texas LLC | Dallas | TX | — | ◇ UNVERIFIED |
| ACAmerican Clay Enterprises | Albuquerque | NM | — | ◇ UNVERIFIED |
| ACAmerican Colloid Company | Pickett | WI | — | ◇ UNVERIFIED |
| AEAmerican Eagle Brick CO | Sunland Park | NM | — | ◇ UNVERIFIED |
| ATAmerican Technical Ceramics | Huntington Station | NY | — | ◇ UNVERIFIED |
| ARAnh Refractories CO. INC. | Fulton | MO | — | ◇ UNVERIFIED |
| AGA.p. Green Refactories INC. | Gary | IN | — | ◇ UNVERIFIED |
| AGA.p. Green Refractories INC. | Middletown | PA | — | ◇ UNVERIFIED |
| APA P Green Refractories INC Sproul Pa Plant | Sproul | PA | — | ◇ UNVERIFIED |
| ACApplied Ceramics INC | Fremont | CA | — | ◇ UNVERIFIED |
| AFAthens Facility | Athens | TX | — | ◇ UNVERIFIED |
| ABAtkinson Brick CO | Perris | CA | — | ◇ UNVERIFIED |
| ABAtkinson Brick Company | Los Angeles | CA | — | ◇ UNVERIFIED |
| AIAwmco INC | Chicago | IL | — | ◇ UNVERIFIED |
| BBBelden Brick | Sugarcreek | OH | — | ◇ UNVERIFIED |
| BBBelden Brick Plant 9 (0679005019) | Sugarcreek | OH | — | ◇ UNVERIFIED |
| BSBetty Sandford | Monrovia | CA | — | ◇ UNVERIFIED |
| BEBloom Engineering CO Inc/baldwin | Pittsburgh | PA | — | ◇ UNVERIFIED |
| BMBnz Materials Inc/zelienople | Zelienople | PA | — | ◇ UNVERIFIED |
| BBBoral Bricks | Phenix City | AL | — | ◇ UNVERIFIED |
| BBBoral Bricks - Atlanta Plant | Smyrna | GA | — | ◇ UNVERIFIED |
| BBBoral Bricks INC | Macon | MS | — | ◇ UNVERIFIED |
| BBBoral Bricks INC Augusta Plant 6 | Augusta | GA | — | ◇ UNVERIFIED |
| BBBoral Bricks Inc:lexington | Lexington | SC | — | ◇ UNVERIFIED |
| BBBoral Bricks:van Wyck | Van Wyck | SC | — | ◇ UNVERIFIED |
| BBBoral Bricks Van Wyck Plant | Lancaster | SC | — | ◇ UNVERIFIED |
| BBBoral Building Products, INC. | Jackson | TN | — | ◇ UNVERIFIED |
| BIBoral Industries INC | Macon | GA | — | ◇ UNVERIFIED |
| BRBoral Roofing LLC | Corona | CA | — | ◇ UNVERIFIED |
| BCBoren Clay Products - Roseboro | Roseboro | NC | — | ◇ UNVERIFIED |
| BIBrickcraft INC | Farmersburg | IN | — | ◇ UNVERIFIED |
| BMBrick Manufacturing - Lehi Plant | Lehi | UT | — | ◇ UNVERIFIED |
| BTBrick & Tile CORP Plant 1 | Lawrenceville | VA | — | ◇ UNVERIFIED |
| BTBuckeye Transfer INC | Columbiana | OH | — | ◇ UNVERIFIED |
| BPBuilding Products Supply CO | Phoenix | AZ | — | ◇ UNVERIFIED |
| BWB & W Tile CO INC | Gardena | CA | — | ◇ UNVERIFIED |
| CUCalderys USA INC. | Jacksonville | AL | — | ◇ UNVERIFIED |
| CUCalderys Usa, INC. (formerly Spar Inc) | Jacksonville | AL | — | ◇ UNVERIFIED |
| CPCalifornia Pottery & Tile Works INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| CCCan Clay Corporation | Cannelton | IN | — | ◇ UNVERIFIED |
| CBCaprock Brick Holdings, LLC | Mangum | OK | — | ◇ UNVERIFIED |
| CCCastaic Clay Manufacturing Company Incorporated | Castaic | CA | — | ◇ UNVERIFIED |
| CCCastaic Clay Products, LLC | Castaic | CA | — | ◇ UNVERIFIED |
| CCCastle & Cook INC. | Lincoln | NE | — | ◇ UNVERIFIED |
