| Chicago DT Operations, LLC IL | Accommodation & Food Services | 0 | — | F |
| CHICAGO ELECTRICAL COMPANY IL | Construction | 0 | — | A |
| Chicago Exhibit Productions IL | Construction | 0 | — | D |
| Chicago Faucets IL | Manufacturing | 0 | — | A |
| Chicago Faucets IN | Manufacturing | 0 | — | F |
| Chicago Faucets WI | Manufacturing | 0 | — | F |
| CHICAGO FITTINGS CORPORATION WI | Manufacturing | 0 | — | A |
| Chicago Flameproof and Wood Specialties IL | Manufacturing | 0 | — | C |
| Chicago Flameproof and Wood Specialties Corp VA | Manufacturing | 0 | — | A |
| Chicago Glue Machine & Supply Co, Inc IL | Wholesale Trade | 0 | — | C |
| Chicago Grade Landfill, Inc. CA | Administrative & Waste Services | 0 | — | F |
| Chicago Grill on the Alley IL | — | 0 | — | — |
| Chicago Grinding and Machine Company IL | Manufacturing | 0 | — | F |
| Chicago Gypsum Supply Inc IL | Wholesale Trade | 0 | — | F |
| Chicago Hardware & Fixture Company IL | Manufacturing | 0 | — | F |
| Chicago Heights Glass, Inc. IL | Construction | 0 | — | A |
| Chicago Heights Steel IL | Manufacturing | 0 | — | F |
| Chicago Hope Academy IL | Other Services | 1 | $1,716,520 | — |
| Chicago Hotel Services, LLC IL | — | 0 | — | — |
| Chicago Laminating, Inc. IL | Professional & Technical Services | 0 | — | F |
| Chicago Landscape NV | Administrative & Waste Services | 0 | — | F |
| Chicago Lighthouse Industries IL | Healthcare & Social Assistance | 0 | — | A |
| Chicago Magnesium IL | Manufacturing | 0 | — | D |
| Chicago Magnesium Cast IL | Manufacturing | 0 | — | A |
| Chicago Mailing Tube Co. IL | Manufacturing | 0 | — | A |
| Chicago Meat Authority IL | Manufacturing | 0 | — | F |
| Chicago Mercantile Exchange Inc. IL | Finance & Insurance | 18 | $134,682 | — |
| Chicago Metal Rolled Products IL | Manufacturing | 0 | — | A |
| Chicago Naperville Courtyard by Marriott IL | Accommodation & Food Services | 0 | — | F |
| Chicago Oriental Wholesale Market IL | Wholesale Trade | 0 | — | A |
| Chicago Painting Inc. NV | Construction | 0 | — | F |
| Chicago Pallet Service, Inc. IL | Manufacturing | 0 | — | F |
| Chicago Parts &Sound IL | Wholesale Trade | 0 | — | D |
| Chicago Parts &Sound WI | Wholesale Trade | 0 | — | A |
| Chicago Pastry Inc IL | Manufacturing | 0 | — | A |
| Chicago Precision Manufacturing Specialties, LLC IL | Manufacturing | 0 | — | A |
| Chicago Processed Fruit Group LLC IL | Manufacturing | 0 | — | A |
| Chicago Public Media, Inc. IL | Information & Media | 1 | $65,879 | — |
| Chicago Public Schools IL | Educational Services | 22 | $252,907 | C |
| Chicago Razzle Dazzle, LLC FL | Arts & Entertainment | 0 | — | F |
| Chicago Rehabilitation Collective, PLLC IL | Healthcare & Social Assistance | 0 | — | F |
| Chicago Renaissance O'Hare IL | — | 0 | — | — |
| Chicago Ridge Nursing & Rehab IL | Healthcare & Social Assistance | 0 | — | F |
| Chicago Rivet & Machine Co IA | — | 0 | — | — |
| Chicago Rivet & Machine Co. PA | Manufacturing | 0 | — | A |
| Chicago Rivet and Machine Company MI | Manufacturing | 0 | — | A |
| Chicago Scenic Studios, Inc. IL | Arts & Entertainment | 0 | — | B |
| Chicago State University IL | Educational Services | 3 | $88,778 | — |
| Chicago Steel Container LLC IL | Manufacturing | 0 | — | C |
| Chicago Steel Group, Inc. IN | Construction | 0 | — | F |
