| HTHexpol TPE Americas LLC | Broadview | IL | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| HGHines Global LLC | Chicago | IL | Chemical Manufacturing325611 | — | ◐ LIKELY ACTIVE |
| HUHubergroup USA, (P005) | Lisle | IL | Chemical Manufacturing325910 | 100-499 | ◐ LIKELY ACTIVE |
| HUHubergroup USA, (P076) | Mount Prospect | IL | Chemical Manufacturing325910 | 20-99 | ◐ LIKELY ACTIVE |
| HUHubergroup USA, (P076) | Mt. Prospect | IL | Chemical Manufacturing325910 | 20-99 | ◐ LIKELY ACTIVE |
| IIllinois | St. Charles | IL | Chemical Manufacturing325910 | 1-19 | ◐ LIKELY ACTIVE |
| IIllinois | Saint Charles | IL | Chemical Manufacturing325910 | 1-19 | ◐ LIKELY ACTIVE |
ILMO Products Company - Jacksonville | Jacksonville | IL | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| IPImmedica Pharma US INC. | Chicago | IL | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| ISINEOS Styrolution - Naperville | Naperville | IL | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| ITIts the Balm Diggity LLC | Toulon | IL | Chemical Manufacturing325620 | — | ▲ REPORTED CLOSED |
| IMITW Motion | Frankfort | IL | Chemical Manufacturing325199 | 20-99 | ◐ LIKELY ACTIVE |
| JTJuno Therapeutics - Libertyville | Libertyville | IL | Chemical Manufacturing325414 | 1-19 | ◐ LIKELY ACTIVE |
| JTJuno Therapeutics - Libertyville 1940 | Libertyville | IL | Chemical Manufacturing325414 | 20-99 | ◐ LIKELY ACTIVE |
| KBKashiv Biosciences Chicago | Chicago | IL | Chemical Manufacturing325412 | 100-499 | ◐ LIKELY ACTIVE |
| KKKensing - Kankakee | Kankakee | IL | Chemical Manufacturing325613 | 100-499 | ◐ LIKELY ACTIVE |
| KSKoppers Stickney | Stickney | IL | Chemical Manufacturing325199 | 20-99 | ◐ LIKELY ACTIVE |
| LILaFox IL | Elburn | IL | Chemical Manufacturing325180 | 1-19 | ◐ LIKELY ACTIVE |
| LALobo Alliance Solutions LLC | Winnebago | IL | Chemical Manufacturing325611 | — | ◐ LIKELY ACTIVE |
| LPLoves Park, IL | Loves Park | IL | Chemical Manufacturing325611 | 20-99 | ◐ LIKELY ACTIVE |
| LLLuminex LCH | Northbrook | IL | Chemical Manufacturing325413 | 100-499 | ◐ LIKELY ACTIVE |
| LMLyondellbasell Morris Site | Morris | IL | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| MMapleton | Mapleton | IL | Chemical Manufacturing325199 | 20-99 | ◐ LIKELY ACTIVE |
| MFMapleton Facility | Mapleton | IL | Chemical Manufacturing325199 | 20-99 | ◐ LIKELY ACTIVE |
| MMetropolis-HSEMS | Metropolis | IL | Chemical Manufacturing325180 | 100-499 | ◐ LIKELY ACTIVE |
| MAMidland America LLC | Tinley Park | IL | Chemical Manufacturing325611 | — | ◐ LIKELY ACTIVE |
| MSMillipore Sigma Distribution | Kankakee | IL | Chemical Manufacturing325412 | 1-19 | ◐ LIKELY ACTIVE |
| MFMorris Facility | Morris | IL | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| NJNexpera Joliet | Channahon | IL | Chemical Manufacturing325180 | 1-19 | ◐ LIKELY ACTIVE |
| PLPa21 LLC | Lake Bluff | IL | Chemical Manufacturing325315 | — | ◐ LIKELY ACTIVE |
| PDPekin Dry Ice Plant | Pekin | IL | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| PPPivotal Products LLC | South Holland | IL | Chemical Manufacturing325620 | — | ◐ LIKELY ACTIVE |
| PIPrayon Inc (Illinois) | Herrin | IL | Chemical Manufacturing325180 | 20-99 | ◐ LIKELY ACTIVE |
| PPPrimary Products Fermentation LLC | Schaumburg | IL | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| PHPrometheus Hydrogen, LLC | Saint Charles | IL | Chemical Manufacturing325120 | — | ▲ REPORTED CLOSED |
| RLRadienz Living | Mount Prospect | IL | Chemical Manufacturing325611 | 100-499 | ◐ LIKELY ACTIVE |
| RFRiden Farm Supply | Good Hope | IL | Chemical Manufacturing325314 | 20-99 | ◐ LIKELY ACTIVE |
| RCRowell Chemical Corporation | Willow Springs | IL | Chemical Manufacturing325180 | 20-99 | ◐ LIKELY ACTIVE |
| RRust-Oleum | Vernon Hills | IL | Chemical Manufacturing325510 | 500+ | ◐ LIKELY ACTIVE |
| SBSAI - Buffalo Grove IL | Buffalo Grove | IL | Chemical Manufacturing325413 | 20-99 | ◐ LIKELY ACTIVE |
| SCSensient Colors Sauget Warehouse | Sauget | IL | Chemical Manufacturing325130 | 20-99 | ◐ LIKELY ACTIVE |
| SCSherwin-williams Company, the | Aurora | IL | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
| SASika Aurora | Aurora | IL | Chemical Manufacturing325998 | 20-99 | ◐ LIKELY ACTIVE |
| SOSika Ottawa | Ottawa | IL | Chemical Manufacturing325998 | 1-19 | ◐ LIKELY ACTIVE |
| SUSIKA UGL United Gilsonite Laboratories | Jacksonville | IL | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| SSSimpson Strong Tie Company, Inc - West Chicago | West Chicago | IL | Chemical Manufacturing325520 | 20-99 | ◐ LIKELY ACTIVE |
| SSSni Solutions INC | Geneseo | IL | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| SDSOFIE - Decatur | Decatur | IL | Chemical Manufacturing325412 | 1-19 | ◐ LIKELY ACTIVE |
| SRSOFIE - Romeoville | Romeoville | IL | Chemical Manufacturing325412 | 20-99 | ◐ LIKELY ACTIVE |
| SLSolo Laboratories Inc | Broadview | IL | Chemical Manufacturing325620 | 100-499 | ◐ LIKELY ACTIVE |