Because the naming rights had expired.
It was renamed the Willis Tower on 16 July 2009.
Willis Tower. The new tenent London-based Willis Group Holdings reached an agreement with the buildings owners and the name of the tower is being changed from Sears tower to Willis Tower.
The Sears name rights expired in 2003 but the Insurance broker Willis from London leased a major portion of the tower asking in exchange the rights of the name. So as in TODAY July 16th 2009 The Tower's name will be Willis Tower
Willis Insurance Group recently became the largest tenant in the building and the owners have officially changed its name to Willis Tower. Sears Roebuck has not had offices in the tower since 1992.
Willis Group Holdings, a London-based insurance broker, consolidated its Chicago area offices to the Sears Tower. As part of the deal, Willis Group Holdings gets to put its own name on the skyscraper.
it is some what a tall building
Willis Tower is the new name for the building formerly known as the Sears Tower.
The sears tower is 110 stories tall 1550 feet tall and 442 meters. It's name was changed to Willis tower in March 2009
The new-name is Willis tower it was renamed in 2009
No one. It is still owned by a group of real estate investors including American Landmark Properties of Skokie, Illinois. Sears has not had offices in the building since the early 1990s and the Willis Insurance Group has recently become the largest tenant in the tower.
The name sought may be "Sears Tower" in Chicago, now named the Willis Tower.
The Willis Tower.