Chicago's Aon Center at 200 E. Randolph St., the 83-story, roughly 2.8 million-square-foot office tower that looms over Millennium Park, has been dropped back into special servicing after its owner ...

The 601W Cos., the borrower on the property, did not make a required payment for tenant improvements and leasing commissions.

The property's financial performance has significantly deteriorated, with occupancy falling to 66 percent and its valuation plummeting.

CHICAGO (WLS) -- Aon, a global financial risk consultant company, is planning to buy out competitor Willis Towers Watson. The deal, valued at about $30 billion, could potentially impact the name of ...

Chicago is home to some of the country's tallest buildings. See which 10 skyscrapers top the list in the Windy City.

CHICAGO — The owners of the Aon Center, Chicago's third-tallest skyscraper, on Monday unveiled plans for an observatory atop the building, potentially setting up a heated competition for tourist ...