| Northern Illinois University | | 23 | |
| Andrew Corporation | | 13 | |
| Molex Incorporated | | 9 | |
| Scrip Companies | | 7 | |
| Armour Eckrich Meats | | 7 | |
| Suncast Corporation | | 6 | |
| Joliet Junior College - IET | | 6 | |
| Dunlee | | 5 | |
| Ideal Industries Incorporated | | 5 | |
| Genuine Parts Co. - Automotive | | 4 | |
| Scholle Corporation | | 4 | |
| SKF - Vehicle Svc Mkt | | 3 | |
| Crane Composites Inc | | 3 | |
| Henry Pratt Company | | 3 | |
| OSG Tap & Die | | 3 | |
| International Truck and Engine | | 2 | |
| Liquid Container LP | | 2 | |
| Kemlite Company Incorporated | | 2 | |
| Cabot Microelectronics Corp | | 2 | |
| NIU | | 2 | |
| Caterpillar Inc | | 2 | |
| Caterpillar Incorporated | | 2 | |
| Eaton Corp-Controls Division | | 1 | |
| Electro Motive Division of GMC | | 1 | |
| Exelon Corporation | | 1 | |
| Emerson, EGS Grp. | | 1 | |
| Dynamesh | | 1 | |
| Filtration Group | | 1 | |
| Empire Today | | 1 | |
| Elgin Sweeper Company | | 1 | |
| Home Juice | | 1 | |
| JPMorgan Chase | | 1 | |
| IQMS | | 1 | |
| Inx International | | 1 | |
| Intuitive Manufacturing System | | 1 | |
| Intertek | | 1 | |
| Infor | | 1 | |
| Hatz Consulting | | 1 | |
| IBM Global Business Services | | 1 | |
| Grainger | | 1 | |
| Hoermann Gadco LLC | | 1 | |
| Henkel Corp | | 1 | |
| Hendrickson Trailer | | 1 | |
| Henderson Engineering Co Inc | | 1 | |
| Dukane Corporation | | 1 | |
| Hadady Corporation | | 1 | |
| Greenlee Textron | | 1 | |
| IDEX Corp | | 1 | |
| America's Food Technologies | | 1 | |
| AST Corporation | | 1 | |
| ASK TERRI | | 1 | |
| Arrow Gear | | 1 | |
| Armour-Eckrich Meats LLC | | 1 | |
| Aquascape Designs Inc | | 1 | |
| APICS The Association for Oper | | 1 | |
| APICS The Assocation for Opera | | 1 | |
| Cook Composites & Polymers | | 1 | |
| Ametek NCC | | 1 | |
| Baxter Healthcare Corporation | | 1 | |
| American Pharmaceutical | | 1 | |
| Alberto Culver USA | | 1 | |
| Akzo Nobel Surface Chemistry L | | 1 | |
| AEC | | 1 | |
| Advance Wire Products | | 1 | |
| ACE Hardware Paint Division | | 1 | |
| Abeam Consulting | | 1 | |
| Amwell- A Div of McNish Corp | | 1 | |
| Chatco Carton | | 1 | |
| Dentsply Rinn Division | | 1 | |
| Dart Logistics Services | | 1 | |
| DARC Corporation | | 1 | |
| Communication Test Design Inc | | 1 | |
| Levergent Technologies | | 1 | |
| CommScope Inc | | 1 | |
| Clifton Gunderson LLP | | 1 | |
| Atlas Co | | 1 | |
| City of St Charles | | 1 | |
| Ball Corporation | | 1 | |
| Caterpillar Logistics Services | | 1 | |
| Catalyst Partners | | 1 | |
| Catalent Pharma Solutions | | 1 | |
| Cabot Microelectronics | | 1 | |
| Blachford Inc | | 1 | |
| bioMerieux, Inc | | 1 | |
| BFV Inc | | 1 | |
| Diversapack LLC | | 1 | |
| Clerestory Consulting LLC | | 1 | |
| Senator International | | 1 | |
| T A Melzer & Assoc Consulting | | 1 | |
| Sun Chemical Corporation | | 1 | |
| Strategic Supply Chain Solutio | | 1 | |
| Strategic Business Consulting, | | 1 | |
| Stone Management Corporation | | 1 | |
| Sterling Hydraulics | | 1 | |
| SRAM | | 1 | |
| Kronos-Central Products | | 1 | |
| Sertech | | 1 | |
| The CH Hanson Company | | 1 | |
| Semblex Corp | | 1 | |
| Saint Gobain Abrasives Inc | | 1 | |
| RR Donnelley | | 1 | |
| Rochester Midland Corporation | | 1 | |
| Robert Whitney Associates | | 1 | |
| Richardson Electronics Ltd | | 1 | |
| Rexnord Industires, LLC | | 1 | |
| Sloan Valve Company | | 1 | |
| Vibro/Dynamics Corp | | 1 | |
| World Book Inc | | 1 | |
| Wolstenholme International | | 1 | |
| Wilton Products, Inc | | 1 | |
| Wilton Industries Incorporated | | 1 | |
| Westell Technologies Inc | | 1 | |
| Wellness, Inc. | | 1 | |
| Waubonsee Community College | | 1 | |
| Tegrant Corporation | | 1 | |
| VIP Computer Incorporated | | 1 | |
| Temple Inland | | 1 | |
| Vactor Mfg | | 1 | |
| University of Illinois | | 1 | |
| Universal Scheduling Company | | 1 | |
| Unilever North America | | 1 | |
| Tropicana | | 1 | |
| Toyal America Inc | | 1 | |
| Touchsensor Techologies | | 1 | |
| Qantel Technologies | | 1 | |
| Wahl Clipper Corporation | | 1 | |
| McKesson | | 1 | |
| Rexnord Bearing Operations | | 1 | |
| Northern Illinois Food Bank | | 1 | |
| Navistar | | 1 | |
| National Consolidation Service | | 1 | |
| Motorola | | 1 | |
| Molex Fiber Optics | | 1 | |
| Molex | | 1 | |
| Notthern Illinois University | | 1 | |
| Microplastics Inc | | 1 | |
| OfficeMax | | 1 | |
| McIntyre Group Limited | | 1 | |
| MARS Snackfood US | | 1 | |
| Maple Leaf Foods, Inc | | 1 | |
| Zebra Technologies Corporation | | 1 | |
| Lebanon Seaboard Corp | | 1 | |
| 3M Incorporated | | 1 | |
| Kraft Foods Incorporated | | 1 | |
| Kraft Foods | | 1 | |
| Miner Enterprises Incorporated | | 1 | |
| Pepsico Chicago | | 1 | |
| Kemper Valve & Fittings Corp. | | 1 | |
| Proex, Inc | | 1 | |
| Premio Inc | | 1 | |
| Preferred Meal Systems | | 1 | |
| Potlatch Forest Products | | 1 | |
| Portola Packaging, Inc. | | 1 | |
| PMB 581 | | 1 | |
| Norton McMurray Manufacturing | | 1 | |
| Petsmart | | 1 | |
| Quantum Foods, Inc | | 1 | |
| Peacock Engineering Company | | 1 | |
| OSI Industries Incorporated | | 1 | |
| Oracle | | 1 | |
| Open Door Rehabilitation Cente | | 1 | |
| Onsrud Outter | | 1 | |
| Omron Automotive Ltd. | | 1 | |
| Olmarc Packing Company | | 1 | |
| Olmarc Packaging Company | | 1 | |
| Plymouth Tube Company | | 1 | |
