| Elliot Construction Corporation | Construction | $1,579,925 | $1,597,655 | 59 | $13.6M |  Research |
| Innovative Systems Group INC | Professional, Scientific, and Technical Services | $1,214,610 | $1,225,002 | 175 | $24.5M | Research |
| Innovative Systems Group INC | Professional, Scientific, and Technical Services | $1,214,610 | $1,226,824 | 125 | $17.5M | Research |
| Dreisilker Electric Motors INC | Wholesale Trade | $1,067,700 | $1,076,746 | 82 | $25.1M | Research |
| Park Pointe Healthcare & Rehabilitation Center LLC | Health Care and Social Assistance | $988,745 | $995,797 | 216 | $36.7M | Research |
| Dreisilker Electric Motors Inc. | Wholesale Trade | $947,637 | $952,138 | 70 | $21.4M | Research |
| Sandwich Squad INC | Accommodation and Food Services | $931,160 | $937,601 | 188 | $33.4M | Research |
| Play Mechanix Inc. | Manufacturing | $863,526 | $873,912 | 39 | $10.9M | Research |
| Jerry Haggerty Chevrolet INC | Retail Trade | $848,615 | $855,875 | 57 | $14.4M | Research |
| Jerry Haggerty Chevrolet INC | Retail Trade | $774,050 | $781,446 | 57 | $14.4M | Research |
| Glen Ellyn Hospitality L.l.c. | Accommodation and Food Services | $747,649 | $678,071 | 71 | $22.2M | Research |
| Revcycle Partners, INC | Professional, Scientific, and Technical Services | $716,447 | $720,835 | 45 | $14.3M | Research |
| Play Mechanix Inc. | Arts, Entertainment, and Recreation | $710,253 | $716,369 | 131 | $18.3M | Research |
| Jit Resources, LLC | Professional, Scientific, and Technical Services | $666,815 | $674,669 | 22 | <$5M | Research |
| Morreale Real Estate Services, Inc. | Real Estate and Rental and Leasing | $659,815 | $665,387 | 56 | $10.2M | Research |
| Morreale Real Estate Services Inc. | Real Estate and Rental and Leasing | $641,165 | $645,154 | 50 | $9.2M | Research |
| Sandwich Squad, Inc. | Accommodation and Food Services | $638,400 | $642,443 | 195 | $34.6M | Research |
| Midwest Medical Contracting, Inc. | Construction | $553,782 | $558,381 | 39 | $12.4M | Research |
| Midwest Medical Contracting, Inc. | Construction | $553,600 | $557,798 | 54 | $17.2M | Research |
| Glen Ellyn Hospitality L.l.c. | Accommodation and Food Services | $534,030 | $451,589 | 71 | $22.2M | Research |
| St Petronille Catholic Church | Other Services (except Public Administration) | $521,400 | $524,963 | 72 | N/A | Research |
| My Buddies Dough LLC | Accommodation and Food Services | $491,837 | $499,146 | 32 | $5.7M | Research |
| Professional Paving and Concrete Company INC | Construction | $485,346 | $489,215 | 46 | $15.7M | Research |
| Naperville-Chicago-Illinois Painting, Ll | Construction | $479,878 | $459,219 | 27 | $8.2M | Research |
| Cm Services, Inc. | Finance and Insurance | $475,000 | $480,265 | 18 | $9.2M | Research |