| ILIM Community Partners NC | Educational Services | 2 | $51,483 | - |
| Ilinesoft, LLC TX | Professional & Technical Services | 5 | $100,751 | - |
| iLink Systems, Inc. WA | Professional & Technical Services | 11 | $117,822 | - |
| ILJIN USA Corporation AL | Manufacturing | 0 | - | F |
| Illes Food Ingredients, Ltd. TX | Manufacturing | 0 | - | F |
| Illinois Auto Electric Co. IL | Manufacturing | 0 | - | F |
| Illinois Bone & Joint Institute IL | Healthcare & Social Assistance | 0 | - | B |
| Illinois CancerCare IL | Healthcare & Social Assistance | 0 | - | C |
| Illinois Central Railroad Company IL | Transportation & Warehousing | 4 | $109,642 | - |
| Illinois Central School Bus IL | Transportation & Warehousing | 0 | - | C |
| Illinois Central School Bus IN | Transportation & Warehousing | 0 | - | F |
| Illinois Central School Bus MO | Transportation & Warehousing | 0 | - | F |
| Illinois Central School Bus TX | Transportation & Warehousing | 0 | - | D |
| Illinois Central School Bus WI | Transportation & Warehousing | 0 | - | C |
| Illinois College of Optometry IL | Educational Services | 1 | $57,512 | - |
| Illinois Department of Corrections IL | Public Administration | 0 | - | D |
| Illinois Department of Human Services IL | Healthcare & Social Assistance | 0 | - | F |
| Illinois Dept of Agriculture IL | Public Administration | 0 | - | A |
| Illinois Eastern Community Colleges Dist. #529 IL | Educational Services | 0 | - | B |
| Illinois Institute of Technology IL | Educational Services | 17 | $83,567 | - |
| Illinois Mutual Life Insurance Company IL | Finance & Insurance | 1 | $103,314 | - |
| Illinois Public Risk Fund IL | Public Administration | 0 | - | A |
| Illinois Secretary of State IL | Public Administration | 0 | - | B |
| Illinois Sleep Products Inc IL | Manufacturing | 0 | - | F |
| Illinois State Toll Highway Authority IL | Transportation & Warehousing | 0 | - | C |
| Illinois State Toll Highway Authority (FFO) IL | Transportation & Warehousing | 0 | - | F |
| Illinois State University IL | Educational Services | 4 | $90,660 | - |
| Illinois Tool Wolks INC MI | - | 0 | - | - |
| Illinois Tool Works TN | Manufacturing | 0 | - | F |
| Illinois Tool Works Inc. IL | Manufacturing | 15 | $106,320 | F |
| Illinois Tool Works Inc. MA | Manufacturing | 1 | $118,227 | D |
| Illinois Wesleyan University IL | Educational Services | 7 | $75,437 | - |
| Illume Ag HR, Inc. CA | - | 0 | - | - |
| Illume Candles LLC MN | - | 0 | - | - |
| Illumifin Corporation MN | Finance & Insurance | 3 | $129,172 | - |
| Illumina Inc. World Headquarters CA | - | 0 | - | - |
| Illumina Technology Solutions, LLC OR | Professional & Technical Services | 3 | $145,333 | - |
| Illumina, Inc Worldwide Headquarters CA | - | 0 | - | - |
| Illumina, Inc. CA | Professional & Technical Services | 39 | $148,602 | C |
| Illumina, Inc. CA | - | 0 | - | - |
| Illuminate HC MI | Healthcare & Social Assistance | 0 | - | - |
| Illuminate USA LLC OH | Manufacturing | 2 | $101,621 | A |
| Illumio, Inc. CA | Professional & Technical Services | 14 | $184,873 | - |
| Illumus FL | - | 0 | - | - |
| Ilogic Tek , L.L.C MA | Professional & Technical Services | 4 | $113,332 | - |
| Ilogic, INC. NJ | Professional & Technical Services | 8 | $107,534 | - |
| ILogixedge LLC VA | Professional & Technical Services | 5 | $91,069 | - |
| ILPEA Industries, Inc. IN | Management of Companies | 0 | - | F |
| Ils Cargo, CORP FL | Transportation & Warehousing | 1 | $120,000 | - |
| Ilsco LLC OH | - | 0 | - | - |
