Willis Group Holdings

(Newser) - An insurance company no one's ever heard of is suddenly a big name in Chicago.  Starting today, the Sears Tower—the tallest building in the Western Hemisphere—becomes Willis Tower, after Willis Group Holdings, the Sun-Times reports. Chicagoans grumbling about the name change, which Willis earned by leasing just...

(Newser) - Sears Tower is to be rechristened Willis Tower in accordance with a new lease signed by insurance firm Willis Group Holdings, the Chicago Tribune reports. The company plans to move some 500 associates into multiple floors. It says its $14.50-per-square-foot move means big real-estate savings, and the name change...