Aldi keeps prices low by primarily selling products under its own labels. It's one of the fastest-growing grocery chains in the U.S., with more than 2,500 stores in 39 states.

Aldi, a U.S.-based company, operates 6,600 stores across more than 10 countries, according to its website. The Associated Press contributed to this report.

Here's what we know. How many Winn-Dixie and Harveys Supermarket stores will Aldi convert? Aldi plans to convert 220 stores still, despite Southeastern Grocers maintaining 170 stores now.

Aldi is a German company, with its U.S. division based in Illinois. Last year Aldi opened nearly 120 stores in the U.S. to bring its total count to more than 2,400. What is C&S Wholesale Grocers?