Fortune 500 has released their list of the top companies in the United States and three Iowa companies made the list, including one based in Cedar Rapids.

Cedar Rapids-based Rockwell Collins was named 490 on the 2016 Fortune 500 list. The last time Rockwell made the list was in 2012 when they were ranked at 496.

Other Iowa companies that made the list are Casey's General Stores and Principal Financial Group. Casey's was ranked at 374 while Principal Financial Group was ranked 236.

Fortune Magazine compiled the list based on total revenue and includes both public and private companies.

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