| North America Central School Bus Intermediate Holding Co, Ll | Transportation and Warehousing | $10,000,000 | $10,115,556 | 500 | $192.2M |  Research |
| Cornerstone Services | Health Care and Social Assistance | $4,073,565 | $4,127,766 | 500 | N/A | Research |
| Berkot, Ltd | Retail Trade | $3,920,400 | $3,975,068 | 500 | $124.8M | Research |
| Franchise Management Investors Us, LLC | Accommodation and Food Services | $2,792,500 | $2,829,988 | 500 | $88.8M | Research |
| West Jeff Auto Sales, LLC | Retail Trade | $2,532,792 | $2,561,919 | 171 | $43.1M | Research |
| P.t. Ferro Construction Co | Construction | $2,530,290 | $2,558,896 | 122 | $37.8M | Research |
| Cosgrove Construction | Construction | $2,000,000 | $2,014,521 | 72 | $82.0M | Research |
| Kozol Bros.. Inc. | Wholesale Trade | $1,994,945 | $2,019,600 | 119 | $30.6M | Research |
| Cosgrove Construction Inc. | Construction | $1,979,000 | $2,000,579 | 73 | $83.2M | Research |
| Imperial Construction Associates Inc. | Construction | $1,938,270 | $1,951,838 | 63 | $14.6M | Research |
| Imperial Construction Associates, Inc. | Construction | $1,938,270 | $1,959,752 | 58 | $13.4M | Research |
| Salem Village Nursing & Rehabilitation Center, LLC | Health Care and Social Assistance | $1,869,703 | $1,877,118 | 221 | $37.6M | Research |
| Cobalt Energy Services, Inc. | Manufacturing | $1,804,100 | $1,509,875 | 72 | $18.9M | Research |
| Corsetti Structural Steel | Construction | $1,794,323 | $1,590,180 | 47 | $10.9M | Research |
| Prodehl Holdings, Inc. | Real Estate and Rental and Leasing | $1,746,922 | $1,756,627 | 164 | $23.8M | Research |
| Performance Floors Corp. | Construction | $1,702,405 | $1,717,490 | 56 | $19.1M | Research |
| Performance Floors, Corporation | Construction | $1,702,405 | $1,720,942 | 70 | $23.9M | Research |
| Peak Home Health Care, LLC | Health Care and Social Assistance | $1,695,400 | $1,320,797 | 130 | $22.3M | Research |
| Corsetti Structural Steel Inc. | Construction | $1,571,235 | $1,578,045 | 60 | $13.9M | Research |
| Quad Plus LLC | Wholesale Trade | $1,569,700 | $1,581,010 | 87 | $26.7M | Research |
| Easter Seals Joliet Region, INC | Health Care and Social Assistance | $1,560,500 | $1,572,377 | 157 | N/A | Research |
| Quad Plus LLC | Professional, Scientific, and Technical Services | $1,503,500 | $1,513,963 | 97 | $12.0M | Research |
| Service Inc. of Illinois | Educational Services | $1,422,843 | $375,926 | 171 | N/A | Research |
| Greater Joliet Area Ymca | Arts, Entertainment, and Recreation | $1,421,395 | $1,437,439 | 500 | N/A | Research |
| D'arcy Buick Gmc, Inc. | Retail Trade | $1,345,200 | $1,331,439 | 105 | $26.5M | Research |