What companies started in Chicago?

Several notable companies originated in Chicago, including the iconic cereal brand Quaker Oats, founded in 1901, and the fast-food giant McDonald's, which began as a single restaurant in 1940. Additionally, the financial services company Morningstar was established in the city in 1984. Other significant companies include the insurance firm Allstate and the popular coffee chain Starbucks, which expanded rapidly after its early days in Chicago.