| CICompact Industries, Inc | St. Charles | IL | Food Manufacturing311351 | 100-499 | ◐ LIKELY ACTIVE |
| CGCompX Grayslake | Grayslake | IL | Fabricated Metal Product Manufacturing332510 | 100-499 | ◐ LIKELY ACTIVE |
| CPConsumer Packaging Woodridge TC | Woodridge | IL | Printing and Related Support Activities323111 | 100-499 | ◐ LIKELY ACTIVE |
| CICookUnity Inc CHI | Chicago | IL | Food Manufacturing311991 | 100-499 | ◐ LIKELY ACTIVE |
| CBCooper Bline | Highland | IL | Fabricated Metal Product Manufacturing332114 | 100-499 | ◐ LIKELY ACTIVE |
| CBCooper Bline INC | Pinckneyville | IL | Fabricated Metal Product Manufacturing332312 | 100-499 | ◐ LIKELY ACTIVE |
| CCordova | Cordova | IL | Chemical Manufacturing325998 | 100-499 | ◐ LIKELY ACTIVE |
| CBCornerstone Building Brands | Paris | IL | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
| COCorporate Office | Sycamore | IL | Computer and Electronic Product Manufacturing334417 | 100-499 | ◐ LIKELY ACTIVE |
| CPCorrugated Packaging Aurora CT | North Aurora, IL 60502 | IL | Paper Manufacturing322211 | 100-499 | ◐ LIKELY ACTIVE |
| CPCorrugated Packaging Bridgeview CT | Bridgeview | IL | Paper Manufacturing322211 | 100-499 | ◐ LIKELY ACTIVE |
| CPCorrugated Packaging Carol Stream SDA | Carol Stream | IL | Paper Manufacturing322211 | 100-499 | ◐ LIKELY ACTIVE |
| CPCorrugated Packaging Galesburg CT | Galesburg | IL | Paper Manufacturing322211 | 100-499 | ◐ LIKELY ACTIVE |
| CPCorrugated Packaging New Lenox CT | New Lenox | IL | Paper Manufacturing322211 | 100-499 | ◐ LIKELY ACTIVE |
| CFCougle Foods | Chicago | IL | Food Manufacturing311615 | 100-499 | ◐ LIKELY ACTIVE |
| CCountryside | Countryside | IL | Chemical Manufacturing325620 | 100-499 | ◐ LIKELY ACTIVE |
| CCCrawford Company Headquarters | Rock Island | IL | Fabricated Metal Product Manufacturing332322 | 100-499 | ◐ LIKELY ACTIVE |
| CCCrown Cork & Seal USA, Inc. - Kankakee Plant | Kankakee | IL | Fabricated Metal Product Manufacturing332431 | 100-499 | ◐ LIKELY ACTIVE |
| CCCSC Chicago | Bedford Park | IL | Paper Manufacturing322211 | 100-499 | ◐ LIKELY ACTIVE |
| CCCS Cosmos STIHL Mfg Inc | South Chicago Height | IL | Fabricated Metal Product Manufacturing332119 | 100-499 | ◐ LIKELY ACTIVE |
| CCCTS Corporation Lisle | Lisle | IL | Computer and Electronic Product Manufacturing334419 | 100-499 | ◐ LIKELY ACTIVE |
Cummins-Allison/Crane Payment Innovations, Mount Prospect | Mount Prospect | IL | Machinery Manufacturing333318 | 100-499 | ◐ LIKELY ACTIVE |
| CGCustom-Pak Group A/Group B/PDC/Corp | Clinton | IL | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
| CCzarnowski-Chicago | Chicago | IL | Miscellaneous Manufacturing339950 | 100-499 | ◐ LIKELY ACTIVE |
| DIDakkota Intergrated Sytems LLC | Chicago | IL | Transportation Equipment Manufacturing336111 | 100-499 | ◐ LIKELY ACTIVE |
| DLDanfoss LLC Loves Park, IL | Loves Park | IL | Machinery Manufacturing333612 | 100-499 | ◐ LIKELY ACTIVE |
| DWDaniel Wright Junior High School | Lincolnshire | IL | Furniture and Related Product Manufacturing337127 | 100-499 | ◐ LIKELY ACTIVE |
| DCDart Container North Aurora | North Aurora | IL | Plastics and Rubber Products Manufacturing326140 | 100-499 | ◐ LIKELY ACTIVE |
| DCDaubert Chemical Company | Forest View | IL | Chemical Manufacturing325520 | 100-499 | ◐ LIKELY ACTIVE |
| DBDecatur BioProducts | Decatur | IL | Food Manufacturing311119 | 100-499 | ◐ LIKELY ACTIVE |
| DSDecatur Stratas Foods | Decatur | IL | Food Manufacturing311225 | 100-499 | ◐ LIKELY ACTIVE |
| DIDeKalb, IL - A311 | Dekalb | IL | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
| DFDfa Fluid - Rockford Il | Rockford | IL | Food Manufacturing311511 | 100-499 | ◐ LIKELY ACTIVE |
| DODivision of Transportation | Libertyville | IL | Fabricated Metal Product Manufacturing332313 | 100-499 | ◐ LIKELY ACTIVE |
| DLDometic Litchfield | Litchfield | IL | Machinery Manufacturing333120 | 100-499 | ◐ LIKELY ACTIVE |
| DGDowners Grove | Downers Grove | IL | Machinery Manufacturing333613 | 100-499 | ◐ LIKELY ACTIVE |
| DHDukane Headquarters | Saint Charles | IL | Machinery Manufacturing333992 | 100-499 | ◐ LIKELY ACTIVE |
| DHDukane Headquarters | St. Charles | IL | Machinery Manufacturing333992 | 100-499 | ◐ LIKELY ACTIVE |
| DDura-Bar | Woodstock | IL | Primary Metal Manufacturing331511 | 100-499 | ◐ LIKELY ACTIVE |
| DADutch American Foods, Inc. Crete | Crete | IL | Food Manufacturing311999 | 100-499 | ◐ LIKELY ACTIVE |
| DEDwfp Egv | Elk Grove Village | IL | Plastics and Rubber Products Manufacturing326199 | 100-499 | ◐ LIKELY ACTIVE |
| DDDynacor Division | Mundelein | IL | Miscellaneous Manufacturing339113 | 100-499 | ◐ LIKELY ACTIVE |
| EFEagle Family Foods Waukegan Plant | Waukegan | IL | Food Manufacturing311919 | 100-499 | ◐ LIKELY ACTIVE |
| EMEcolab Manufacturing Roscoe | Roscoe | IL | Machinery Manufacturing333318 | 100-499 | ◐ LIKELY ACTIVE |
| ELEDECO LLC, dba SMF | Minonk | IL | Fabricated Metal Product Manufacturing332999 | 100-499 | ◐ LIKELY ACTIVE |
| EJE J Basler Factory | Schiller Park | IL | Fabricated Metal Product Manufacturing332721 | 100-499 | ◐ LIKELY ACTIVE |
| EFElement Food Solution | Hodgkins | IL | Food Manufacturing311824 | 100-499 | ◐ LIKELY ACTIVE |
| EPElkay Plumbing Products - Lanark | Lanark | IL | Machinery Manufacturing333415 | 100-499 | ◐ LIKELY ACTIVE |
| EGElk Grove | Elk Grove Village | IL | Printing and Related Support Activities323111 | 100-499 | ◐ LIKELY ACTIVE |
| EGElk Grove - Flexible Packaging - E030 | Elk Grove | IL | Plastics and Rubber Products Manufacturing326112 | 100-499 | ◐ LIKELY ACTIVE |