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We figured out the best fortune 500 companies to work for in Illinois using data on salaries, company financial health, and employee diversity. You can also search for the best fortune 500 companies to work for in any other state or city.

Zippia score 4.9
Ameren Corporation is an American power company created December 31, 1997 by the merger of St. Louis, Missouri's Union Electric Company and the neighboring Central Illinois Public Service Company of Springfield, Illinois. It is now a holding company for several power companies and energy companies.
Zippia score 4.9
They pioneered a supercharged form of computing loved by the most demanding computer users in the world -- scientists, designers, artists, and gamers. For them, we've built the equivalent of a time machine. Founded in 1993, NVIDIA is headquartered in Santa Clara, California, United States.
Zippia score 4.8
Yahoo operates an online web portal intended to provide the latest news on cricket, finance, lifestyle, movies, celebrity, travel, and more. It also gives users access to various products and services for email, instant messaging, and mobile blogging, as well as information services, web searches, directories, and alerts. It also offers marketing and advertising services for advertisers with a streamlined, simple advertising technology that leverages data, content, and technology, enabling advertisers to connect with their target audiences.
Zippia score 4.7
For over 40 years, Animal Health International, Inc. has been the premier animal health service provider in North America. The company represents over 1,000 manufacturers that supply products focused on beef and dairy cattle, equine, poultry, and swine. Moreover, this reliable business offers products ranging from vaccines and pharmaceuticals to high-technology art equipment and software.
Zippia score 4.7
INTL FCStone Inc. (Ticker symbol: INTL) is a Fortune 500 company, providing customers across the globe with execution, clearing and advisory services in commodities, capital markets, currencies, asset management and more. The heritage of INTL FCStone dates back to 1924 when a door-to-door egg wholesaler founded a business called Saul Stone and Company. Through organic growth, acquisitions and the 2009 merger between International Assets Holding Corporation and FCStone Group, they have become a global, Fortune 500 financial services organization. Today, INTL FCStone is relied upon by thousands of companies around the world for their wide array of services - many of which are not offered by any other organization of their type - and their in-depth industry knowledge and expertise.
Zippia score 4.6
Graybar, a Fortune 500 company, specializes in supply chain management services and is a leading North American distributor of high-quality components, equipment and materials for a number of industries. With $6 billion in revenue (2014), Graybar employs thousands of men and women at more than 260 North American distribution centers. As one of North America's largest employee-owned companies, Graybar has the power and stability of a big company coupled with the integrity and drive of a neighborhood business. Founded in 1869, Graybar procures, warehouses, and delivers tens of thousands of electrical supplies, communications and data products, components and related services to its customers. Graybar stocks and sells hundreds of thousands of items from thousands of manufacturers. Graybar serves customers in the construction market, the commercial, institutional and government (CIG) market, and the industrial and utility markets, with products and services that support new construction, infrastructure updates, building renovation, facility maintenance, repair and operations, and original equipment manufacturing. Through its distribution network and value-added services, including kitting and integrated solutions, Graybar is helping its customers to power and network their facilities with speed, intelligence and efficiency. By adding sophisticated logistics and project management to its operations, Graybar has become a vital link in America's supply chain.
Zippia score 4.6
Owens-Illinois, Inc. is a glass container manufacturer. The Company is also a preferred partner for various food and beverage brands. It provides glass packaging for beer, wine, spirits, food, non-alcoholic beverages, cosmetics and pharmaceuticals. It also produces tableware and stemware for household use. The Company manufactures glass containers in a range of sizes, shapes and colors. It has 77 glass manufacturing plants in 21 countries. The Company has four reportable segments based on its geographic locations: Europe, North America, South America and Asia Pacific. Its customers include Anheuser-Busch InBev, Brown Forman, Carlsberg, Coca-Cola, Constellation, Diageo, Heineken, Kirin, MillerCoors, Nestle, PepsiCo, Pernod Ricard, SABMiller, and Saxco International. The Company has 35 glass container manufacturing plants located in the Czech Republic, Estonia, France, Germany, Hungary, Italy, the Netherlands, Poland, Spain and the United Kingdom
Zippia score 4.5
Motorola Solutions, Inc. (NYSE: MSI) is a data communications and telecommunications equipment provider that succeeded Motorola Inc. following the spin-off of the mobile phones division into Motorola Mobility Holdings, Inc. in 2011. The company is headquartered in Schaumburg, Illinois, a Chicago suburb. Motorola Solutions creates innovative, mission-critical communication solutions and services that help public safety and commercial customers build safer cities and thriving communities. Its products can be found at work in a variety of industries including law enforcement, fire, emergency medical services, national government security, utilities, mining, energy, manufacturing, hospitality, retail, transportation and logistics, education, and public services. Motorola Solutions previously held the Enterprise Mobility Solutions division of the former Motorola, Inc. It sold this division to Zebra Technologies in 2014. Motorola Solutions also previously had a Networks division, which it sold to Nokia Siemens Networks in a transaction that was completed in 2011.
Zippia score 4.4
Universal Health Services, Inc. (UHS) is one of the nation's largest and most respected healthcare management companies, operating through its subsidiaries acute care hospitals, behavioral health facilities and ambulatory centers nationwide, in Puerto Rico and the U.S. Virgin Islands. Founded in 1978 by Alan B. Miller, Chairman and CEO, UHS subsidiaries employ more than 60,000 individuals. UHS maintains one of the strongest balance sheets in the industry and is rated investment grade by Moody's, Standard & Poor's and Fitch. This strong capital position has enabled the company to develop and acquire many new facilities over the past few years.
Zippia score 4.3
Caterpillar Inc., is an American corporation which designs, manufactures, markets and sells machinery and engines and sells financial products and insurance to customers via a worldwide dealer network. Caterpillar is the world's leading manufacturer of construction and mining equipment, diesel and natural gas engines, industrial gas turbines and diesel-electric locomotives. With more than US$89 billion in assets, Caterpillar was ranked number one in its industry and number 44 overall in the 2009 Fortune 500. Caterpillar stock is a component of the Dow Jones Industrial Average. Caterpillar Inc. traces its origins to the 1925 merger of the Holt Manufacturing Company and the C. L. Best Tractor Company, creating a new entity, the California based Caterpillar Tractor Company. In 1986, the company re-organized itself as a Delaware corporation under the current name, Caterpillar Inc. Caterpillar's headquarters are located in Peoria, Illinois, United States. Caterpillar machinery is recognizable by its trademark "Caterpillar Yellow" livery and the "CAT" logo.
Zippia score 4.3
The Kraft Heinz Company, commonly known as Kraft Heinz, is an American multinational food company formed by the merger of Kraft Foods and Heinz co-headquartered in Chicago, Illinois, and Pittsburgh, Pennsylvania.