| Carrier One | Real Estate and Rental and Leasing | $294,745 | $297,660 | 12 | $5.4M |  Research |
| Imageworks Manufacturing Inc. | Manufacturing | $292,375 | $293,431 | 32 | $31.7M | Research |
| Imageworks Manufacturing, Inc. | Manufacturing | $292,375 | $294,454 | 36 | $35.7M | Research |
| San German LLC | Accommodation and Food Services | $252,278 | $0 | 18 | <$5M | Research |
| Park Forest Cooperative | Real Estate and Rental and Leasing | $147,985 | $148,745 | 8 | <$5M | Research |
| Park Forest Cooperative | Real Estate and Rental and Leasing | $147,985 | $149,399 | 8 | <$5M | Research |
| Fontillist Harris | Retail Trade | $145,467 | $146,507 | 4 | <$5M | Research |
| Iceland Jewellers INC | Manufacturing | $145,460 | $146,106 | 4 | <$5M | Research |
| Taylor&taylor Transport LLC | Professional, Scientific, and Technical Services | $140,657 | $141,614 | 7 | <$5M | Research |
| Cedarwood Cooperative, Inc. | Real Estate and Rental and Leasing | $124,295 | $125,683 | 8 | N/A | Research |
| Illinois Philharmonic Orchestra | Arts, Entertainment, and Recreation | $112,878 | $113,554 | 64 | N/A | Research |
| Illinois Philharmonic Orchestra | Arts, Entertainment, and Recreation | $112,877 | $113,414 | 61 | N/A | Research |
| Children's First Learning Academy Inc. | Health Care and Social Assistance | $101,410 | $102,266 | 20 | <$5M | Research |
| Children's First Learning Academy, Inc. | Educational Services | $101,410 | $102,332 | 460 | $59.8M | Research |
| Everyday Music Group INC | Arts, Entertainment, and Recreation | $100,521 | $101,945 | 4 | <$5M | Research |
| Chicagoland Athletics LLC | Educational Services | $99,850 | $100,094 | 1 | <$5M | Research |
| Kmart Transportation Incorporated | Wholesale Trade | $99,372 | $100,200 | 7 | <$5M | Research |
| Taylor&taylor Transport | Accommodation and Food Services | $99,220 | $100,127 | 5 | <$5M | Research |
| Dimensional Design Construction, Inc. | Construction | $89,052 | $89,450 | 8 | <$5M | Research |
| Dynamic Iron, Inc. | Construction | $86,400 | $87,257 | 6 | <$5M | Research |
| Dynamic Iron INC | Construction | $86,400 | $87,569 | 9 | <$5M | Research |
| Hatcher Field Service | Real Estate and Rental and Leasing | $83,700 | $21,037 | 8 | <$5M | Research |
| New Vision Transportation Inc. | Transportation and Warehousing | $82,650 | $83,212 | 4 | <$5M | Research |
| Make It Straight Auto Body & P | Other Services (except Public Administration) | $78,000 | $78,605 | 5 | <$5M | Research |
| Illinois Montessori Children's House Inc. | Educational Services | $70,017 | $70,836 | 14 | <$5M | Research |