| Midwest Anesthesiologists Ltd. | Health Care and Social Assistance | $2,000,000 | $2,014,222 | 64 | $20.1M |  Research |
| Incipe, LLC | Retail Trade | $1,775,591 | $1,792,558 | 112 | $28.2M | Research |
| Omakin Restaurants, LLC | Accommodation and Food Services | $1,706,700 | $1,722,785 | 500 | $88.8M | Research |
| Mancari's Chrysler Plymouth, Inc. | Retail Trade | $1,518,693 | $1,528,818 | 104 | $26.2M | Research |
| Mancari's Chrysler Plymouth INC | Retail Trade | $1,518,693 | $1,528,437 | 104 | $26.2M | Research |
| Webb Chevrolet, Inc. | Retail Trade | $1,394,500 | $1,409,220 | 86 | $21.7M | Research |
| Park Lawn School and Avtivity Center, Inc. | Health Care and Social Assistance | $1,336,000 | $1,346,468 | 364 | N/A | Research |
| Oak Lawn Motors, Ic | Retail Trade | $1,123,835 | $1,133,825 | 85 | $21.4M | Research |
| Mike Haggerty Buick Gmc INC | Other Services (except Public Administration) | $1,057,428 | $1,063,504 | 54 | $10.6M | Research |
| Rich Oak Lawn Hotel LLC | Accommodation and Food Services | $1,016,771 | $1,027,108 | 35 | $10.9M | Research |
| Ed Napleton Oak Lawn Imports, Inc. | Retail Trade | $1,011,290 | $844,386 | 50 | $12.6M | Research |
| Foot and Ankle Associates, Ltd. | Health Care and Social Assistance | $975,000 | $984,162 | 92 | $16.8M | Research |
| Oak Lawn Respiratory and Rehabilitation Center, LLC | Health Care and Social Assistance | $954,000 | $0 | 117 | $19.9M | Research |
| Kelly Nissan INC | Manufacturing | $927,762 | $937,684 | 46 | $12.0M | Research |
| Kelly Nissan INC | Retail Trade | $910,700 | $918,289 | 52 | $13.1M | Research |
| Rckc Corporation | Unknown | $896,600 | $902,503 | 268 | N/A | Research |
| Atlantic Painting Co., Inc. | Construction | $873,130 | $882,395 | 17 | $5.8M | Research |
| Atlantic Painting Co. | Construction | $873,130 | $879,678 | 12 | <$5M | Research |
| Concord Nursing and Rehabilitation Center, LLC | Health Care and Social Assistance | $776,550 | $784,747 | 108 | $18.4M | Research |
| Rich Oak Lawn LLC | Accommodation and Food Services | $726,265 | $731,571 | 129 | $40.3M | Research |
| Nursepower Services Corp | Administrative and Support and Waste Management | $723,500 | $728,605 | 55 | $8.7M | Research |
| Frank Shirey Cadillac, INC | Retail Trade | $650,700 | $658,188 | 50 | $12.6M | Research |
| Hometown Bcn Inc. | Accommodation and Food Services | $631,523 | $635,434 | 70 | $12.4M | Research |
| Family Eye Physicians, Ltd. | Health Care and Social Assistance | $625,565 | $468,391 | 35 | $8.2M | Research |
| Ghaben Auto Group, LLC | Retail Trade | $610,500 | $616,638 | 48 | $12.1M | Research |