Donlen LLC was an American fleet leasing and management company headquartered in Bannockburn, Illinois, a suburb of Chicago. The company provided consultation, maintenance, and outsourcing services for corporate vehicle fleets. In 2021, Donlen was acquired by Athene Holding Ltd. In 2023, Donlen LLC, Wheels Inc. and LeasePlan USA merged under the name Wheels. The consolidated organization became one of the largest fleet management companies in North America, managing over 900,000 vehicles and serving clients in 58 countries through its Ayvens alliance.