| Mrc Polymers Inc. | Manufacturing | $925,198 | $931,865 | 88 | $87.3M |  Research |
| Thoreau Facility Services LLC | Administrative and Support and Waste Management | $883,600 | $895,529 | 110 | $23.8M | Research |
| Laser Products Industries INC | Manufacturing | $813,900 | $822,876 | 32 | $8.4M | Research |
| Pollmann North America INC | Manufacturing | $740,162 | $745,466 | 73 | $72.4M | Research |
| Pollman North America Inc. | Manufacturing | $740,161 | $744,438 | 69 | $68.4M | Research |
| Thomas Motors of Joliet, Inc. | Retail Trade | $703,000 | $707,468 | 67 | $16.9M | Research |
| Mechanical Concepts of Illinois, Inc. | Construction | $649,700 | $656,731 | 23 | $7.3M | Research |
| Nexus Employment Solutions Plus Inc. | Administrative and Support and Waste Management | $644,062 | $647,837 | 60 | $9.4M | Research |
| Cgi Automated Manufacturing, Inc. | Manufacturing | $634,700 | $638,067 | 45 | $11.0M | Research |
| Thomas Motors of Joliet INC | Retail Trade | $616,500 | $619,321 | 62 | $15.6M | Research |
| Everest Snow Management INC | Administrative and Support and Waste Management | $585,767 | $590,095 | 25 | $5.4M | Research |
| Metro Exhibit Corporation | Manufacturing | $565,105 | $370,411 | 18 | <$5M | Research |
| Apex Industrial Automation LLC | Other Services (except Public Administration) | $551,935 | $519,773 | 42 | $9.0M | Research |
| Gary Galassi and Sons, Inc. | Construction | $548,500 | $553,497 | 37 | $12.6M | Research |
| Gary Galassi and Sons Inc. | Construction | $548,500 | $555,996 | 37 | $12.6M | Research |
| Stucchi USA INC | Manufacturing | $543,750 | $547,564 | 38 | $9.9M | Research |
| R.s. Service Systems, INC | Construction | $542,228 | $0 | 38 | $12.5M | Research |
| Worldwide Material Handling Products, LLC | Wholesale Trade | $527,528 | $531,469 | 39 | $11.9M | Research |
| Resicom Custom Painting and Maintenance | Administrative and Support and Waste Management | $527,100 | $540,658 | 43 | $8.1M | Research |
| Universal Insulation Inc. | Construction | $523,000 | $526,269 | 24 | $6.1M | Research |
| Able Masonry Development Co. | Construction | $506,385 | $509,437 | 18 | <$5M | Research |
| Stucchi Usa, INC | Wholesale Trade | $503,700 | $506,612 | 26 | $8.0M | Research |
| Resicom Custom Painting & Maintenance | Administrative and Support and Waste Management | $503,648 | $510,601 | 18 | <$5M | Research |
| Tri-Tech Electric Inc. - Tab2927 | Construction | $486,620 | $489,553 | 16 | $5.3M | Research |
| Tri Tech Electric Inc. | Construction | $486,600 | $492,213 | 16 | $5.3M | Research |