List of Illinois companies

List of Illinois companies includes notable companies that are, or once were, headquartered in Illinois.

A

* AAR Corporation
* Abbott Laboratories
* Access One Inc
* ACCO Brands
* Ace Hardware
* Alberto-Culver
* Aldi USA
* Allied Van Lines
* Allstate
* Andrew Corporation
* Anixter International
* Aon Corp.
* AptarGroup
* Archer Daniels Midland
* ArmaLite
* Arthur J. Gallagher & Co.
* A.T. Kearney
* Aventine Renewable Energy Holdings
* Azteca Foods, Inc.

B

* Baker & McKenzie
* Bally Total Fitness
* BarBri
* Barton Brands
* Baxter International
* Bekins Van Lines
* Bernard Food Industries
* BFG Technologies
* BigMachines
* Blue Cross and Blue Shield Association
* Boeing
* Böwe Bell & Howell
* BP - North America
* Bradford Exchange
* Brown's Chicken & Pasta
* Brunswick Corporation
* Budget Rent a Car
* Busey Bank
* Butera

C

* CDW
* Chicago Fire Soccer team
* CF Industries
* CNA Financial Corporation
* CNH Global
* Career Education Corporation
* Caterpillar
* Central Grocers Cooperative
* CheapTickets
* Claire's
* Collections Etc.
* Commonwealth Edison
* Corn Products International
* COUNTRY Insurance & Financial Services
* Crate and Barrel
* Culligan

D

* DAXCON Engineering, Inc.
* Dade Behring Holdings
* Deere & Company
* Doculabs
* Dominick's, a division of Safeway

E

* Earl L. Henderson Trucking
* Elite Financial Investment
* Equity Office Properties Trust
* Equity Residential
* Eureka (company)
* Exelon

F

* Fannie May
* Ferrara Pan Candy Company
* First Midwest Bank
* Fortune Brands

G

* GTCR Golder Rauner
* Gardner Denver
* General Growth Properties

H

* HSBC Finance
* Harris Bank
* Hewitt Associates
* Hitachi Home Electronics (America) Inc.
* Hospira
* Hub Group
* Hyatt

I

* IGA (supermarkets)
* Illinois Tool Works
* Integrys Energy Group, Inc.

J

* Jays Foods
* Jewel (supermarket), a division of SuperValu
* Jimmy John's Gourmet Sandwich Shops
* Jones Lang LaSalle

K

* Kerasotes Theatres
* Kmart
* Kraft Foods

L

* Laidlaw
* LaSalle Bank
* Les Baer
* Lettuce Entertain You Enterprises

M

* MacNeil Automotive Products Limited
* McDonald's
* Metal Management, Inc.
* Midas (automotive service)
* Midwest Transit Equipment
* Midwest Transit Inc.
* Midwest Transit System
* MIF Design Studio
* Molex
* Moody Publishers
* Morningstar, Inc.
* Morton Salt
* Motorola

N

* Nalco Holding Company
* Navistar International, parent company of International Truck and Engine Corporation.
* NAVTEQ
* Nemertes Research
* New World Van Lines
* Nicor
* Northern Trust

O

* OfficeMax
* Old Republic International
* OptionsXpress

P

* Pabst Brewing Company
* Packaging Corp. of America
* Pactiv
* Peoples Energy
* Pioneer Railcorp
* Play It Again Sports
* Portillo's Restaurants
* Potbelly Sandwich Works
* PrepMe

Q

* Quaker Oats Company
* Quincy Newspapers

R

* RR Donnelley
* Radio Flyer (company)
* Rand McNally
* Road Ranger
* Robert Bosch LLC
* Rock River Arms
* Ryan International Airlines
* Ryerson, Inc.

* Salton Inc.
* Sara Lee
* Sauer-Danfoss
* SCORE! Educational Centers
* Sears, Roebuck and Company
* Shurfine
* Smurfit-Stone Container
* Solo Cup Company
* Springfield Armory, Inc.
* State Farm Insurance
* Stern (gaming company)
* Stewart-Warner
* Stir Crazy (restaurant)
* Sullivan's Foods
* Sun-Times Media Group

T

* Ted (airline)
* Telephone and Data Systems
* Tellabs
* Tenneco
* Thermos L.L.C.
* Tootsie Roll Industries
* Topco Associates, LLC
* Toshiba Machine Company, America
* Tribune Company
* True Value
* Trustwave

U

* UAL Corporation, parent company of United Airlines and Ted Airlines
* Ulta
* United Stationers
* United Van Lines and Mayflower Transit, both part of UniGroup
* U.S. Cellular
* U.S. Robotics
* USF Companies
* USG Corporation
* Unitrin

V

* Valspar
* Victory Records
* Vienna Beef

W

* Wahl Clipper
* Walgreens
* Weber-Stephen Products Co.
* Whittman-Hart
* Wilson Sporting Goods
* Wrigley
* World Dryer
* W. W. Grainger

Y

* Yellow Cab

Z

* Zenith Electronics
* Zurich Holding Company of America, Inc.