| ESElementis Specialties INC | Saint Louis | 20–99 | ● ACTIVE |
| UPUS Polymers Accurez LLC | Saint Louis | 20–99 | ● ACTIVE |
 Chemisphere Corporation | Saint Louis | — | ● ACTIVE |
 Api Innovation Center | Saint Louis | — | ● ACTIVE |
 Dna Polymerase Technology INC | Saint Louis | — | ● ACTIVE |
 Z Specialty Products, INC. | Saint Louis | — | ● ACTIVE |
| MMallinckrodt | Saint Louis | 20–99 | ◐ LIKELY ACTIVE |
| BCBayer Cropscience-krauss Plant | Saint Louis | — | ◐ LIKELY ACTIVE |
| EPElantas Pdg, INC. Second St | Saint Louis | — | ◐ LIKELY ACTIVE |
 Gunther Salt Company | Saint Louis | — | ◐ LIKELY ACTIVE |
| KIKop-coat, INC. | Saint Louis | — | ◐ LIKELY ACTIVE |
| UPUS Paint CORP | Saint Louis | — | ◐ LIKELY ACTIVE |
| WHWillert Home Products-willert Home Products | Saint Louis | — | ◐ LIKELY ACTIVE |
| CCChemisphere CORP | Saint Louis | — | ◐ LIKELY ACTIVE |
| MRMidland Resources INC | Saint Louis | — | ◐ LIKELY ACTIVE |
| PAProcter and Gamble St. Louis | Saint Louis | — | ◐ LIKELY ACTIVE |
| BMBrenntag Mid-south, INC. | Saint Louis | — | ◇ UNVERIFIED |
| CIChemline Inc-st. Louis | Saint Louis | — | ◇ UNVERIFIED |
| POPoly One Corporation-st. Louis | Saint Louis | — | ◇ UNVERIFIED |
| SASigma - Aldrich Co-sigma Chemical Company | Saint Louis | — | ◇ UNVERIFIED |
| TDThe Dial Corporation-st. Louis | Saint Louis | — | ◇ UNVERIFIED |
| TCTrans Chemical Corp-trans Chemical CORP | Saint Louis | — | ◇ UNVERIFIED |
| FPFoundry Products, INC. Dba Sealers, INC. | Saint Louis | — | ◐ LIKELY ACTIVE |
| ISIcl Specialty Products INC Carondelet Plant | Saint Louis | — | ◐ LIKELY ACTIVE |
| LCLange-stegmann Company-st. Louis | Saint Louis | — | ◐ LIKELY ACTIVE |
| MLMerial Limited - Merial Limited | Saint Louis | — | ◐ LIKELY ACTIVE |
| MIMid-west Industrial Chemical | Saint Louis | — | ◐ LIKELY ACTIVE |
| PCPq Corporation -the | Saint Louis | — | ◐ LIKELY ACTIVE |
| RCRenew Chemical INC | Saint Louis | — | ◐ LIKELY ACTIVE |
| SCSensient Colors INC | Saint Louis | 100–499 | ◐ LIKELY ACTIVE |
| SLSterling Lacquer Mfg-sterling Lacquer Mfg | Saint Louis | — | ◐ LIKELY ACTIVE |
| WWWalter Wurdack Industrial Finishes | Saint Louis | — | ◐ LIKELY ACTIVE |
| AHAllied Health Care Products-st. Louis | Saint Louis | — | ◐ LIKELY ACTIVE |
| KAKoch Agronomic Services Llc- | Saint Louis | — | ◐ LIKELY ACTIVE |
| SASigma - Aldrich Mfg LLC Dekalb Facility | Saint Louis | — | ◐ LIKELY ACTIVE |
| AMApex Metal Finishing-apex Metal Finishing | Saint Louis | — | ◇ UNVERIFIED |
| BWBarry Wehmiller Co-barry Wehmiller CO | Saint Louis | — | ◇ UNVERIFIED |
| CLCare-tech Laboratories/consolidated Chemical, INC. | Saint Louis | — | ◇ UNVERIFIED |
| DSDevan Sealants, INC | Saint Louis | — | ◇ UNVERIFIED |
| HUHaleon US Holdings LLC | Saint Louis | — | ◇ UNVERIFIED |
 Jost Chemical CO INC | Saint Louis | — | ◇ UNVERIFIED |
| JRJ R Simplot CO | Saint Louis | — | ◇ UNVERIFIED |
| MLMerial Limited | Saint Louis | — | ◇ UNVERIFIED |
| MPMissouri Paint & Varnish | Saint Louis | — | ◇ UNVERIFIED |
| MTMulti Technologies INC | Saint Louis | — | ◇ UNVERIFIED |
| PSPermacel St Louis Inc-permacel St Louis INC | Saint Louis | — | ◇ UNVERIFIED |
| PSPetnet Solutions | Saint Louis | — | ◇ UNVERIFIED |
| PQPharmacia Queeny Pilot Plant | Saint Louis | — | ◇ UNVERIFIED |
| RIRhodia Inc-rhodia INC | Saint Louis | — | ◇ UNVERIFIED |
| SASigma Aldrich Chemical Company | Saint Louis | — | ◇ UNVERIFIED |
