Wintrust is a financial holding company in the United States that operates 15 chartered community banks in northern Illinois and southern Wisconsin.

[2] Wintrust is usually classified as a medium-sized banking institution in the United States and it trades on the Nasdaq Global Select Market with stock symbol WTFC.

Wintrust was among the recipients of capital from the United States government through the U.S. Treasury's Troubled Asset Relief Program.

[17] On August 1, 2024, it was announced that Wintrust had completed the merger of its operations with Macatawa Bank Corporation, a company based in Holland, Michigan.

Wintrust has also partnered with the Chicago White Sox for the naming rights to club seats at Guaranteed Rate Field.