| Morton Industries LLC | Manufacturing | $4,767,700 | $4,833,918 | 389 | $101.9M |  Research |
| Sam Leman I, LLC | Retail Trade | $3,077,817 | $3,113,509 | 278 | $70.1M | Research |
| Otto Baum Company, Inc. | Construction | $3,027,500 | $3,062,989 | 141 | $160.6M | Research |
| Apostolic Christian Lifepoints, Inc. | Health Care and Social Assistance | $2,230,100 | $2,256,056 | 365 | N/A | Research |
| Fort Transfer Co | Transportation and Warehousing | $1,968,100 | $302,858 | 94 | $21.4M | Research |
| Bradley Services, Inc. | Manufacturing | $1,928,400 | $1,955,290 | 221 | $54.0M | Research |
| Encore Services LLC | Professional, Scientific, and Technical Services | $1,602,900 | $1,612,384 | 155 | $16.0M | Research |
| Air-Land Transport Service, Inc. | Real Estate and Rental and Leasing | $1,562,700 | $1,573,292 | 113 | $51.1M | Research |
| Apostolic Christian Restmor, Inc. | Health Care and Social Assistance | $1,541,000 | $1,554,227 | 198 | N/A | Research |
| Millennia Professional Services of Illin | Professional, Scientific, and Technical Services | $1,240,100 | $1,254,499 | 77 | $10.8M | Research |
| Kaiser Electrical Contractors Inc. | Construction | $1,138,362 | $1,145,793 | 55 | $18.1M | Research |
| Kaiser Electrical Contractors INC | Construction | $1,138,300 | $1,150,885 | 38 | $12.5M | Research |
| Lighthouse Buick Gmc INC | Retail Trade | $1,042,417 | $1,048,814 | 118 | $29.7M | Research |
| Menold Construction INC | Construction | $939,875 | $944,627 | 75 | $22.8M | Research |
| Menold Construction, INC | Construction | $939,800 | $945,909 | 68 | $77.5M | Research |
| Mike Murphey Ford INC | Retail Trade | $903,300 | $910,878 | 113 | $28.5M | Research |
| J.j. Braker and Sons, Inc. | Construction | $830,800 | $840,269 | 30 | <$5M | Research |
| Synergetic Industries LLC | Professional, Scientific, and Technical Services | $799,500 | $804,386 | 60 | $7.4M | Research |
| Wm. Aupperle & Sons, INC | Construction | $748,400 | $755,240 | 32 | $7.4M | Research |
| Parker Fabrication Inc. | Manufacturing | $687,300 | $694,860 | 54 | $13.2M | Research |
| Risinger Bros. Transfer, INC | Transportation and Warehousing | $563,400 | $568,108 | 32 | $6.4M | Research |
| 4b Elevator Components Ltd. | Manufacturing | $562,702 | $566,297 | 39 | $10.2M | Research |
| Bob Grimm Chevrolet, Inc. | Retail Trade | $503,500 | $508,703 | 49 | $12.3M | Research |
| Rope & Clark Jj Development Company | Accommodation and Food Services | $403,800 | $407,490 | 130 | $23.1M | Research |
| Mathis-Kelley Construction Supply Company | Retail Trade | $379,800 | $383,229 | 36 | $7.4M | Research |