Jones Lang LaSalle also picks up management of another 2.2million sf in the New Jersey and Washington, DC markets fromAtlanta-based owner Wells Real Estate Funds. "Jones Lang LaSalle'sreputation and well-respected brand, coupled with the caliber ofits employees, makes us confident in their ability to successfullylease and manage our assets," says Wells Real Estate chief realestate officer Don Miller, whose company paid $465 million for thebuilding in 2003.

While terms were not disclosed, published net lease rates at AonCenter begin at $17.50 per sf, which would make the lease worthnearly $23 million. However, staying at the East Loop building hadstrong support from company employees, according to focus groupsand surveys. "Aon Center exceeds all of our expectations," saysJones Lang LaSalle chief executive officer Peter C. Roberts.

Occupancy at Aon Center, first known as the Standard OilBuilding when it was constructed in 1972 for the namesake tenant,stands at 85%. Total vacancy in the East Loop submarket is 22.7%,according to the most recent market report from US EquitiesRealty.