"You can't improve upon AT&T's credit and name," AnitaPallardy, Prime Group Realty SVP, tells GlobeSt.com. "DeStefano isexpanding globally and they're a good, professional firm. Thesetenants join other internationally-recognized tenants in thebuilding, like Perkins+Will and Thornton Tomasetti."

Mark Keebler and Brad Serot, with CB Richard Ellis, representedDeStefano + Partners in the lease. George Kotrogiannis and KurtKittner, with Jones Lang LaSalle, represented AT&T Corp. Askinglease rates range from $18 to $28 triple net in the 1.1-million-sfoffice building. It is now 90% leased with about 118,000 sf ofoffice space remaining vacant.

The building's occupancy rate will take a serious hit in 2010,when Jenner & Block LLP vacates the tower rise portion -371,944 sf in floors 37 through 47, or about a third of thebuilding. "They're moving to a building directly to the west,"Pallardy says. "This creates a phenomenal new anchor tenantopportunity in some of the best space in Chicago." Pallardy saysPrime Group has already seen substantial interest in the space.