Equity Office Properties Trust, headquartered in Chicago, Illinois, is the largest owner of office buildings in the United States. It was formed in 1976 by Samuel Zell [1] and in February 2007, was acquired by the Blackstone Group for $23 billion plus the assumption of $16 billion in debt [2]. The acquisition was the largest leveraged buyout since the buyout of RJR Nabisco.
Notable properties
- Chase Tower (Indianapolis)
- Chicago Civic Opera House
- Columbia Center
- Frost Bank Tower
- One Worldwide Plaza
- Wachovia Financial Center
- Washington Mutual Tower


