| ABAcme Brick Company - Jonesboro Plant | Jonesboro | AR | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ● ACTIVE |
| ABAcme Brick CO Oklahoma City | Oklahoma City | OK | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ● ACTIVE |
| CCCloud Ceramics | Concordia | KS | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ● ACTIVE |
Gbc Advanced Materials LLC | Latrobe | PA | Nonmetallic Mineral Product Manufacturing327110 | 20-99 | ● ACTIVE |
| HBHebron Brick CO | Hebron | ND | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ● ACTIVE |
Morgan Advanced Ceramics, INC | Hudson | NH | Chemical Manufacturing325180 | 20-99 | ● ACTIVE |
Motawi Enterprise INC | Ann Arbor | MI | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ● ACTIVE |
| SBStatesville Brick Company | Statesville | NC | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ● ACTIVE |
| UTUsb Tennessee LLC | Gleason | TN | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ● ACTIVE |
| VUVesuvius USA - Wurtland Plant | Wurtland | KY | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ● ACTIVE |
| YHYankee Hill Brick & Tile CO. | Lincoln | NE | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ● ACTIVE |
| ACApplied Ceramics, INC | Doraville | GA | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ● ACTIVE |
| BHBirmingham Hot Metal Coatings | Birmingham | AL | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ● ACTIVE |
| BHBirmingham Hot Metal Coatings, INC. | Birmingham | AL | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ● ACTIVE |
Poly6 Technologies, INC. | Burlington | MA | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ● ACTIVE |
| ABAcme Brick Co-ouachita | Malvern | AR | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| GSGeneral Shale Brick, INC. - Plant 51 | East Spencer | NC | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| LBLakewood Brick & Tile CO | Lakewood | CO | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| LCLogan Clay Products CO | Logan | OH | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| RSRefractory Sales and Service CO. INC. | Bessemer | AL | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| SCSuperior Clay CORP | Uhrichsville | OH | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| UAUsb Alabama LLC | Bessemer | AL | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| AIAci Industries, LLC | Laurens | SC | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| BLBrickcraft LLC | Center Point | IN | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| CCChristy Catalytics, LLC | Crooksville | OH | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| HMHolland Manufacturing CORP | Dolton | IL | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| NMNextech Materials LTD | Lewis Center | OH | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| SHStiles & Hart Brick CO | Bridgewater | MA | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| TBTri-county Block & Brick INC | Swanton | OH | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| SCSilicon Carbide Products INC | Horseheads | NY | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| ACAlkegen-SCI (Specialty Ceramics/Unifrax) | Columbiana | OH | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| AMA & M Refractories, INC. | New Boston | OH | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| HIHarbisonwalker international 1700 | South Point | OH | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| HWHarbison Walker International Windham | Windham | OH | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| MOMosaics of America, INC. | Fort Pierce | FL | Nonmetallic Mineral Product Manufacturing327110 | 20-99 | ◐ LIKELY ACTIVE |
| RSRefectory Specialties incorporated | Sebring | OH | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| SPSealy Plant | Sealy | TX | Chemical Manufacturing325180 | 20-99 | ◐ LIKELY ACTIVE |
| SPSummit Pressed Brick & Tile CO | Pueblo | CO | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| SCSuperior Clay Corporation | Uhrichsville | OH | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| TCThe Christy Refractories Company L.L.C. | Saint Louis | MO | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| TATYK America | Clairton | PA | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| URUpstate Refractory Services, Inc. | Newark | NY | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| VIVacuform Incorporated | Sebring | OH | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| WCWelding Ceramics LLC | Chattanooga | TN | Nonmetallic Mineral Product Manufacturing327112 | 20-99 | ◐ LIKELY ACTIVE |
| 9S901 S 3rd Street & 4505 Prosperity Drive | Fort Pierce | FL | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| APAdel Plant | Adel | IA | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| BBBennett Brick Plant | Milsap | TX | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| BBBirmingham Brick Plant | Leeds | AL | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| BPBlasch Precision Ceramics Albany | Albany | NY | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| BCBlock-Lite Company, Inc | Flagstaff | AZ | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |