• Abbott
• Abbott Laboratories
• Abercrombie & Fitch
• Accelo
• AIG
• Aju Hotels & Resorts
• Ale Solutions
• Allied Benefit Systems
• Allstate Insurance Company
• Alvarez & Marsal
• Anders CPAs + Advisors
• Andersen Tax
• Anixter
• Aon
• Aon Hewitt
• Archer Daniels Midland (ADM)
• Archway Technology Partners
• Arthur J. Gallagher & Co.
• AT Kearney
• Avant
• Bain & Company
• Baird
• Baker Tilly Virchow Krause
• Bank of America
• Bansley & Kiener
• Barnes & Noble
• Baxter Healthcare
• BDO
• BDO USA
• Bemis Company
• Bloomberg
• Blue Sky Clayworks
• BMO Capital Markets
• Boeing
• Bolar Hirsch & Jennings
• Braviant Holdings
• Brunswick Corporation
• CAP Barbell
• Caterpillar
• CBIZ
• CBIZ MHM
• CBRE
• Champaign Surplus
• Charles Schwab
• Cigital
• Citigroup
• CJ Affiliate
• Clarity Partners
• CliftonLarsonAllen
• CNA Insurance
• CNA Insurance Companies
• CohnReznick
• Conversant Media
• Cortland Capital Market Services
• CPR Medical Billing
• Credit Suisse
• Crowe Horwath
• Culligan International
• Cummins
• Davis & Hosfield Consulting
• Deloitte
• Deloitte Indonesia
• Duff & Phelps
• EHS Solutions
• Elivate America Corporation
• Enfusion
• Enterprise Holdings
• Entrecorps
• Ernst & Young
• Evercore Partners
• Excellence Performance Coaching
• Exelon
• EY
• Fidelity Accounting & Tax Services
• FIL Consulting
• First Column Student Leasing
• Fisher Investments
• FTI Consulting
• Fulbright Program
• General Electric
• General Growth Properties
• Geoffrey, Johns & Associates
• GF Xinde Investment Management Company
• GLP
• Goldman Sachs
• Google
• Grant Thornton
• Greenhill & Co.
• Hallmark Industries
• Hawthorne Race Course
• Health Alliance
• HealthScape Advisors
• Heartland Angels
• Heitman
• Houlihan Lokeu
• Houlihan Lokey
• HS Automotive Alabama
• Huron Consulting Group
• IBM
• Illinois Tool Works
• Institute Of Government And Public Affairs
• Institutional Capital
• Jackson National Asset Management
• Jefferies
• Jimmy John's
• JLL
• Jones Day
• Joseph W Hendrickson LLC.
• JP Morgan Chase
• JPMorgan Chase
• kCura
• Keefe, Bruyette & Woods
• Knutte & Associates, P.C.
• KOTRA
• KPMG
• Lazard Freres & Co.
• Lenovo
• Lobel Financial
• Magnetar Capital
• MaloneBailey
• Mass Mutual Financial Group-Pearre & Associates
• MasterCard
• Mathieson, Moyski, Austin & Co.
• Matteson Liquors
• McGladrey
• McKinsey & Company
• McMaster-Carr
• Meaden and Moore
• Mesirow Financial
• Microsoft
• Miller Cooper
• Miller Cooper & Co
• Moelis & Company
• Monsanto
• Morgan Stanley
• Morningstar
• Motorola Solutions
• Move
• Mu Sigma
• Mueller & Co
• Mueller & Co.
• Neighbors Credit Union
• Network Services Company
• New York Business Consultant
• NISA Investment Advisors
• Northern Trust Corporation
• Oberweis Asset Management
• Ocean Tomo
• Old Republic Insurance Group
• One North Captive
• ORBA
• Organix Recycling
• Pasquesi Sheppard
• PepsiCo
• Plante Moran
• Premier Gymnastics Academy
• PricewaterhouseCoopers
• PricewaterhouseCoopers (PwC)
• Protiviti
• PRT Tour & Counseling Company
• Prudential Capital Group
• Raymond James
• Raymond James & Associates
• RMB Capital
• Robert W. Baird
• Rodl Langford De Kock
• RSM
• RSM US LLP
• RubinBrown
• Sagent Advisors
• Samsung
• Scheffel Boyle CPA
• Seattle Mariners
• Selden Fox
• Siemens PLM Software
• Siguler Guff & Company
• Sikich
• SK Engineering & Construction
• Smarat
• SmithBucklin
• SP Plus Corporation
• Spectrum Communications and Consulting
• Stout Risuis Ross
• Sun-Wa Technos
• SunSource
• Synchrony Financial
• Teach for America
• Technical Consulting & Research
• The Claro Group
• The Kenrich Group
• Topel Forman
• Toyota Motor Sales
• TravelClick
• True Partners Consulting
• TruQua Enterprises
• U.S. Army
• Uber Technologies
• Uline
• Union Leasing
• University of Illinois at Chicago
• University of Illinois at Urbana-Champaign
• University of Illinois at Urbana-Champaign, Gies College Of Business
• Wells Fargo
• Wells Fargo Capital Finance
• Whirlpool Corporation
• William Blair & Company
• Winston & Strawn
• Wintrust
• Wintrust Financial Corporation
• Workday
• ZS Associates