This is a list of Illinois companies which includes notable companies that are headquartered in Illinois, or were previously headquartered in Illinois. In general, this list does not include companies headquartered in one of the municipalities of the Chicago metropolitan area. Companies based in Illinois A Abbott Laboratories Abbvie Abt Electronics Alliant Credit Union Allstate Alton Steel American River Transportation Company Anixter Archer Daniels Midland Astro-Physics Axium Foods B Basler Electric Beer Nuts Believers Broadcasting Corporation Bell Sports Belly (loyalty program) BMO Harris Bank BenchPrep Black Dog Books Boeing Braintree (company) Brewer Investment Group Brown County State Bank Bunn-O-Matic Corporation Busey Bank Byline Bank C Cars.com Caterpillar Inc. CDW Citadel LLC Citizens Equity First Credit Union City Water, Light & Power Conagra Brands Consolidated Communications Country Financial Credit Union 1 D Dawn Equipment Company Daxcon Detonics Discover Financial Donnelley Financial Solutions Dot Foods Dover Corporation E Eli Bridge Company Elliott Aviation Estwing F Federal Signal Corporation Ferrara Candy Company First Midwest Bancorp Fieldglass Follett Corporation The Frantz Manufacturing Company Frasca International G Gardner Denver GE Healthcare Glik's Gogo Inflight Internet GoHealth Golub Capital Great Planes Model Manufacturing Greenlee Group O Growmark Groupon Grubhub GTCR H Harrisonville Telephone Company Horace Mann Educators Corporation Horizon Hobby Hyatt I Ideal Industries Illinois National Bank IMC Financial Markets Invenergy Illinois Tool Works J Jimmy John's JLL (company) John Deere K Kress Corporation Kraft Foods L Legacy Audio Levi, Ray & Shoup Lewis Machine and Tool Company Lightbank M Maui Jim Madison Dearborn Partners Meatheads Burgers & Fries Metropolitan Educational Enterprises Monical's Pizza Morton Salt Morningstar, Inc. Motorola Mobility Motorola Solutions Mrs. Fisher's McDonald's N Nalco Holding Company National Railway Equipment Company Navistar International Northern Trust Nuveen P Pacific Bearing Company Pactiv ParkWhiz Peoria Charter Coach Company Pioneer Railcorp Plochman's Portillo's Restaurants Potbelly Sandwich Shop Peapod Q QCR Holdings Quincy Media R RLI Corp. RR Donnelley Road Ranger Rock River Arms Rural King S Sears & Roebuck Shakespeare Squared Shaw Media Skidmore, Owings & Merrill SpotHero Springfield Armory, Inc. STARadio Corporation State Farm Suburban Express T Testor Corporation Thoma Bravo Titan Tire Corporation Tower Hobbies Trend Is Dead! Records Tri-State Christian Television U United Airlines Uptake (business) V Volition Vivid Seats W Wahl Clipper Walgreens Boots Alliance Western Cartridge Company West Monroe Partners Wicks Organ Company Wiss, Janney, Elstner Associates, Inc. Wolfram Research, Inc. Wrigley Company Z Zebra Technologies Companies formerly based in Illinois A