Colleen Martin

Part of GATX Corp., General American Transportation Corp manages railroad tank and specialized freight cars and tank storage. The company is based in Chicago, IL.

Part of AT & T, Inc., Illinois Bell Telephone Co. LLC is a company that provides telephone communication services. The company is based in Springfield, IL.

Trans Union LLC provides information and risk management solutions to individual consumers and businesses. Its products and solutions include customer credit reporting, marketing and audience segmentation, customer acquisition, fraud and ID management, analytics and consulting, portfolio management, healthcare revenue cycle management, investigations and collections, customer engagement solutions and data breach services. The company was founded in 1968 and is headquartered in Chicago, IL.