| Uropartners LLC | Health Care and Social Assistance | $5,998,410 | $6,066,447 | 380 | $119.3M |  Research |
| Brainlab Inc. | Manufacturing | $5,774,900 | $5,838,424 | 337 | $88.2M | Research |
| Sterling Staffing, INC | Administrative and Support and Waste Management | $4,357,200 | $4,406,824 | 326 | $51.3M | Research |
| A&r Janitorial Service, Inc. | Administrative and Support and Waste Management | $4,344,545 | $4,401,432 | 441 | $95.5M | Research |
| The Grove, Inc. | Accommodation and Food Services | $4,121,500 | $4,169,151 | 500 | $88.8M | Research |
| York Solutions, LLC | Professional, Scientific, and Technical Services | $3,907,500 | $3,953,243 | 128 | $26.5M | Research |
| Legacy Professionals LLP | Professional, Scientific, and Technical Services | $2,357,044 | $2,383,823 | 158 | $50.3M | Research |
| Sterling Engineering, Inc. | Professional, Scientific, and Technical Services | $2,026,963 | $2,049,935 | 139 | $17.1M | Research |
| The Grove Inc. | Accommodation and Food Services | $2,000,000 | $2,012,219 | 500 | $88.8M | Research |
| Kw Precast LLC | Manufacturing | $1,908,162 | $650,684 | 154 | $152.7M | Research |
| Healthcare Financial Management Association | Other Services (except Public Administration) | $1,901,680 | $1,921,662 | 72 | N/A | Research |
| York Enterprise Solutions, Inc. | Professional, Scientific, and Technical Services | $1,456,390 | $1,468,529 | 68 | $14.1M | Research |
| Tandem Management, Inc. | Finance and Insurance | $1,371,155 | $1,379,268 | 84 | $43.2M | Research |
| Chemical Personnel Search, Incorporated | Administrative and Support and Waste Management | $1,311,700 | $1,318,987 | 73 | $11.5M | Research |
| Chemical Personnel Search Inc. | Administrative and Support and Waste Management | $1,311,681 | $1,319,005 | 66 | $10.4M | Research |
| Regent Surgical Health Holdings, INC | Health Care and Social Assistance | $1,029,237 | $1,039,155 | 52 | $16.3M | Research |
| Illini Precast-Romeoville LLC | Manufacturing | $852,639 | $199,784 | 65 | $64.5M | Research |
| Illini Precast-Speed LLC | Manufacturing | $835,737 | $347,783 | 75 | $74.4M | Research |
| Illini Precast LLC | Manufacturing | $779,510 | $582,753 | 57 | $56.5M | Research |
| Silveredge Business Systems, Ltd. DBA Silveredge Consulting | Professional, Scientific, and Technical Services | $775,855 | $784,493 | 36 | $7.4M | Research |
| United Home Loans, Inc. | Finance and Insurance | $656,383 | $668,197 | 45 | $23.1M | Research |
| Chfs Holdings INC | Information | $625,220 | $0 | 41 | $6.9M | Research |
| Chfs Holdings INC | Information | $625,219 | $632,235 | 45 | $7.6M | Research |
| Edwin Hancock Engineering Co. | Professional, Scientific, and Technical Services | $611,225 | $615,215 | 26 | <$5M | Research |
| The Chicago Highlands Club LLC | Arts, Entertainment, and Recreation | $591,200 | $595,525 | 43 | $6.0M | Research |