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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 4.8
Ingredion Incorporated is a leading global ingredient solutions provider to the food, beverage, brewing and pharmaceutical industries as well as numerous industrial sectors. We are committed to supplying our customers with quality, innovative ingredient solutions that are on trend and in demand. Headquartered in the Chicago suburb of Westchester, Illinois, we turn corn, tapioca, wheat, potatoes and other raw materials into a myriad of ingredients. With more than 11,000 employees around the world, we serve customers in more than 60 diverse markets in over 100 countries. In 2013, our net sales reached $6.3 billion.
Zippia score 4.7
Founded in 2004, Anthem Inc. has been the largest for-profit managed health care company in the Blue Cross and Blue Shield Association. Headquartered in Indianapolis, Indiana, Anthem, Inc. delivers a number of leading health benefit solutions through a broad portfolio of integrated health care plans and related services. This American health insurance company also offers specialty products such as life and disability insurance benefits, dental, vision, behavioral health benefit services, and more.
Zippia score 4.6
Opower Inc provides cloud-based software to the utility industry in the US. Energy providers use their platforms to deliver proactive, digital communications for them to manage energy demand and lower service cost. Their software is distributed to 100 utilities worldwide. The company was founded by friends Dan Yates and Alex Laskey in year 2007, and now has a record of 500 employees in its five offices.
| Rank | Company | Zippia score |
|---|---|---|
| 1 | Ingredion |