| IGIndustrial Graphics Corporation | Chicago | — | ◇ UNVERIFIED |
| IHInteger Holdings Corporation Dba Lake Region Medical | Wheeling | — | ◇ UNVERIFIED |
| IRInternational Research & Recovery Corporation | Des plaines | — | ◇ UNVERIFIED |
| ITInternational Truck & Engine CORP | Chicago | — | ◇ UNVERIFIED |
| ISIom Svcs Bp | Chicago | — | ◇ UNVERIFIED |
| IPIowa & Pulaski Auto Body | Chicago | — | ◇ UNVERIFIED |
| IMIron Mountain | Des Plaines | — | ◇ UNVERIFIED |
| IEIwema Excavating | Cicero | — | ◇ UNVERIFIED |
| JCJ&a Cartage INC | Summit | — | ◇ UNVERIFIED |
| JHJacob & Hefner Associates INC | Chicago | — | ◇ UNVERIFIED |
| JUJakubik's Unocal 76 | Northbrook | — | ◇ UNVERIFIED |
| JMJames Mansfield & Sons INC | Lyons | — | ◇ UNVERIFIED |
| JIJarck Industries, INC. | Chicago | — | ◇ UNVERIFIED |
| JCJasso's Collision Center INC | Cicero | — | ◇ UNVERIFIED |
| JAJ&e Auto Repair INC | Justice | — | ◇ UNVERIFIED |
| JMJhelsa Metal Polishing & Fabrication INC | Chicago | — | ◇ UNVERIFIED |
| JJJ & J Amoco | Oak Park | — | ◇ UNVERIFIED |
| JGJoes Gas Stop | Maywood | — | ◇ UNVERIFIED |
| JDJohler Demolition | River Grove | — | ◇ UNVERIFIED |
| JDJohler Demolition INC | Schaumburg | — | ◇ UNVERIFIED |
| JDJohler Demolition INC | Skokie | — | ◇ UNVERIFIED |
| JHJohn Hancock Ctr - American Tower | Chicago | — | ◇ UNVERIFIED |
| JGJoj Gas Services | Brookfield | — | ◇ UNVERIFIED |
| JLJones Lang Lasalle Americas Il LP | Chicago | — | ◇ UNVERIFIED |
| JLJones Lang Lasalle/metlife | Chicago | — | ◇ UNVERIFIED |
| JAJoules Angstrom Uv Printing Inks | Crestwood | — | ◇ UNVERIFIED |
| JAJr Auto Collision | Arlington Heights | — | ◇ UNVERIFIED |
| JLJroaro, LLC | Chicago Heights | — | ◇ UNVERIFIED |
| JLJroaro, LLC | Chicago Heights | — | ◇ UNVERIFIED |
| K2K 2 Tank Lines LLC | Countryside | — | ◇ UNVERIFIED |
| KLKanzler Landscape Contractor INC | Chicago | — | ◇ UNVERIFIED |
| KCKendall County Concrete Crushing INC | Skokie | — | ◇ UNVERIFIED |
| KCKendall County Concrete Crushing INC | Schaumburg | — | ◇ UNVERIFIED |
| KCKendall County Concrete Crushing INC | Morton Grove | — | ◇ UNVERIFIED |
| KKKennedy & Kimball Svc INC | Chicago | — | ◇ UNVERIFIED |
| KJKenny/kiewit/shea Jv | River Grove | — | ◇ UNVERIFIED |
| KAKen's Amoco | Chicago | — | ◇ UNVERIFIED |
| K8King 83rd INC | Chicago | — | ◇ UNVERIFIED |
| KPKms Petro Mart INC | Chicago | — | ◇ UNVERIFIED |
 Kocsis Brothers Machine CO | Alsip | — | ◇ UNVERIFIED |
| KDKovacevic Dragan - Danny Bp | Norridge | — | ◇ UNVERIFIED |
| LILab-line Instruments INC | Melrose Park | — | ◇ UNVERIFIED |
| LHLa Hansen Public Works Ctr | Arlington Heights | — | ◇ UNVERIFIED |
| LSLake St Food Mart | Oak Park | — | ◇ UNVERIFIED |
| LMLakha Mgmt LLC | Berwyn | — | ◇ UNVERIFIED |
| LPLamm Partners INC | Maywood | — | ◇ UNVERIFIED |
| LPLandmeier Pw | Elk Grove Village | — | ◇ UNVERIFIED |
| LSLangs Svc | Chicago | — | ◇ UNVERIFIED |
| LJLars Johnson D.D.S., P.C. | Hoffman Estates | — | ◇ UNVERIFIED |
| LFLawndale Forging & Tool Works | Chicago | — | ◇ UNVERIFIED |
