Northern Trust Corporation is a financial services company headquartered in Chicago, Illinois that caters to corporations, institutional investors, and ultra high net worth individuals. Northern Trust is one of the largest banking institutions in the United States and one of the oldest banks in continuous operation. As of June 30, 2021, it had $1.5 trillion in assets under management and $15.7 trillion in assets under custody, and is the fourth largest bank in the world by assets under custody. Northern Trust Corporation is incorporated in Delaware.