| | Blobal Stone Calcium carbonate & limestone milling | |
| | Cal-Chlor Corp Repackaging of calcium chloride | |
| | Calcium Products Inc Fine ground calcium limestone & flux stone for animal feeds & industry; high calcium desulfurization stone; garden lime; field marker & grinding wheels | |
| | CarboMinerals LP Manufactures calcium carbonate pigments | |
| | CLM Corp High calcium lime & hydrated lime, ground limestone | |
| | Custom Grinders Sales Inc Alumina trihydrate, calcium carbonate & calcium sulfate; grinding | |
| | Delavau Group Nutritional supplements, vitamins, granulations & calcium tablets packaging | |
| | Elkem Metals Inc Calcium carbide, lime & reagents | |
| | ESM Group Inc Steel desulfurizers, compounds for ladle insulators, casting fluxes & powders; magnesium & calcium injection | |
| | Flor-Dri Supply Co Inc Sweeping compounds, floor absorbents, repackaging of calcium chloride | |
| | Franklin Industrial Minerals Calcium carbonate products; limestone fillers & extenders, agricultural limestone | |
| | Franklin Industrial Minerals Industrial chemicals: calcium carbonate & aluminum trihydrate | |
| | Frantz Co Inc Cube cut sawdust for meat packers, metals industries, foundries; sweeping compound & absorbents for floors, ground corn cob for tumbling metal; animal bedding; calcium chloride; ice melt | |
| | General Chemical Corp Liquid & dry calcium chloride | |
