| Bison Gear and Engineering Corp | Manufacturing | $4,285,000 | $4,339,590 | 283 | $74.1M |  Research |
| Vertex Resource Group INC | Professional, Scientific, and Technical Services | $3,992,000 | $4,038,583 | 445 | $46.1M | Research |
| Tvv-C Acquisitions, LLC | Manufacturing | $3,878,300 | $3,932,812 | 212 | $55.5M | Research |
| Rosin Optical Co INC | Health Care and Social Assistance | $3,338,300 | $3,377,247 | 240 | $56.2M | Research |
| Microplastics, Inc. | Manufacturing | $3,201,000 | $3,238,447 | 305 | $79.9M | Research |
| United Laboratories INC | Manufacturing | $3,034,500 | $3,068,919 | 236 | $234.1M | Research |
| Rh Wine & Co, Inc. | Finance and Insurance | $2,002,252 | $2,024,853 | 115 | $59.1M | Research |
| Microplastics INC | Manufacturing | $2,000,000 | $2,017,699 | 268 | $265.8M | Research |
| Midwest Groundcovers, LLC | Agriculture, Forestry, Fishing and Hunting | $1,947,700 | $1,966,003 | 220 | $22.5M | Research |
| Doctor's Data Inc. | Health Care and Social Assistance | $1,833,702 | $1,851,122 | 160 | $37.1M | Research |
| Doctor's Data, Inc. | Health Care and Social Assistance | $1,802,845 | $1,820,365 | 166 | $38.5M | Research |
| Valley Fire Protection Systems, LLC | Construction | $1,606,811 | $1,616,586 | 70 | $22.1M | Research |
| Clarke Mosquito Control Products, Inc. | Administrative and Support and Waste Management | $1,558,339 | $1,566,347 | 88 | $16.6M | Research |
| A.m. Staffing Group Inc. | Administrative and Support and Waste Management | $1,462,733 | $1,480,042 | 83 | $13.1M | Research |
| Bukas Lighting Group, Inc. | Manufacturing | $1,309,700 | $1,308,556 | 95 | $24.9M | Research |
| Corrosion Monitoring Services, Inc. | Construction | $1,304,750 | $1,317,476 | 100 | $31.6M | Research |
| Clarke Environmental Mosquito Management, Inc. | Administrative and Support and Waste Management | $1,287,495 | $1,294,183 | 85 | $18.4M | Research |
| Chicago Mold Engineering Co., Inc. | Manufacturing | $1,257,500 | $1,266,093 | 78 | $20.4M | Research |
| Colonial Ice Cream INC | Accommodation and Food Services | $1,242,700 | $1,250,709 | 153 | $27.2M | Research |
| Al Piemonte Cadillac, Inc. | Retail Trade | $1,200,744 | $1,212,318 | 101 | $25.5M | Research |
| Via Carlita, LLC | Retail Trade | $1,078,261 | $1,088,564 | 78 | $19.7M | Research |
| Mcgrath Motors, Inc. | Retail Trade | $1,060,300 | $1,069,519 | 94 | $23.7M | Research |
| Skyline Plastering Inc. | Construction | $999,999 | $1,004,638 | 40 | $45.6M | Research |
| Warwick Publishing Company | Manufacturing | $999,500 | $1,007,003 | 86 | $85.3M | Research |
| Bradley Adhesive Applications, Inc. | Manufacturing | $984,501 | $811,769 | 90 | $89.3M | Research |