| AAAmcor American Metal Chem CORP | Chicago | — | ◇ UNVERIFIED |
| ABAmerican Blending and Filling | Waukegan | — | ◇ UNVERIFIED |
| APAmerican Powder Coating INC | Saint Charles | — | ◇ UNVERIFIED |
| AIAmerichem INC | Elgin | — | ◇ UNVERIFIED |
| ACAmericoats Coatings International INC | Franklin Park | — | ◇ UNVERIFIED |
| AIAmericoats-coatings International INC | Franklin Park | — | ◇ UNVERIFIED |
| AAndersonbrecon | Rockford | — | ◇ UNVERIFIED |
| AGArcar Graphics LLC | West Chicago | — | ◇ UNVERIFIED |
| ACArch Chemicals Specialty Products, INC. | Seward | — | ◇ UNVERIFIED |
| AAArdex Americas | Bourbonnais | — | ◇ UNVERIFIED |
| ABArgo Biodiesel Plant | Argo | — | ◇ UNVERIFIED |
| AIArkema INC | Lemont | — | ◇ UNVERIFIED |
| ARAventine Renewable Energy | Canton | — | ◇ UNVERIFIED |
| ACAxalta Coating Systems LLC | Morton Grove | — | ◇ UNVERIFIED |
| BCB-b Chemical CORP | La Grange | — | ◇ UNVERIFIED |
| BRBelt Railway CO of Chicago | Bedford Park | — | ◇ UNVERIFIED |
| BLBiologos LLC | Montgomery | — | ◇ UNVERIFIED |
| BFBiovantage Fuels LLC | Belvidere | — | ◇ UNVERIFIED |
| BGBoc Gases | Romeoville | — | ◇ UNVERIFIED |
| BCBorden Chemical Forest Park Plant | Forest Park | — | ◇ UNVERIFIED |
| BMBrady Mccasland INC | East Saint Louis | — | ◇ UNVERIFIED |
| BMBrenntag Mid South INC | East Saint Louis | — | ◇ UNVERIFIED |
| BLBridgeport Landings LLC | Chicago | — | ◇ UNVERIFIED |
| CICabery, Il | Cabery | — | ◇ UNVERIFIED |
| CMCabot Microelectronics CORP | Aurora | — | ◇ UNVERIFIED |
| CGCameron Great Lakes | Batavia | — | ◇ UNVERIFIED |
| CCCandy & CO | Chicago | — | ◇ UNVERIFIED |
| CCCandy & CO | Chicago | — | ◇ UNVERIFIED |
| CPCarbit Paint CO | Chicago | — | ◇ UNVERIFIED |
| CICasey, Il | Casey | — | ◇ UNVERIFIED |
| CCCedar Concepts INC | Chicago | — | ◇ UNVERIFIED |
| CLCelanese Ltd-meredosia Facility | Meredosia | — | ◇ UNVERIFIED |
| CCCelta Chemical | Granite City | — | ◇ UNVERIFIED |
| CCCenterbridge Capital Partners Iii, L.p. | Riverdale | — | ◇ UNVERIFIED |
| CIChemstream INC Midwest Branch | West Frankfort | — | ◇ UNVERIFIED |
| CAChemtura Agrosolutions -trace Chemicals | Pekin | — | ◇ UNVERIFIED |
| CQChicagoland Quad Cities Express, INC. - Bridgeview | Bridgeview | — | ◇ UNVERIFIED |
| CMChicago Metallic Corp-interfinish Plant | Bridgeview | — | ◇ UNVERIFIED |
| CSChicago Specialties, LLC | Chicago | — | ◇ UNVERIFIED |
| CMChilo Manufacturing & Plating Company | Chicago | — | ◇ UNVERIFIED |
| CCChroma CORP | Mchenry | — | ◇ UNVERIFIED |
| CLChroma Liquid Color CORP | Chicago Heights | — | ◇ UNVERIFIED |
| CJC J R Processing CO | Des Plaines | — | ◇ UNVERIFIED |
| CMClaire Manufacturing | Addison | — | ◇ UNVERIFIED |
| CClariant | Mchenry | — | ◇ UNVERIFIED |
| CMClarke Mosquito Control | Roselle | — | ◇ UNVERIFIED |
 Clarke Mosquito Control Products INC. | Schaumburg | — | ◇ UNVERIFIED |
| CPClorox Products | Chicago | — | ◇ UNVERIFIED |
| CSClorox Sales CO | Minooka | — | ◇ UNVERIFIED |
| CICmic INC | Skokie | — | ◇ UNVERIFIED |
