Four Oaks Place is a complex of skyscrapers in Uptown Houston, Texas, United States. Managed by Transwestern, the complex includes the 420 ft (128 m) 1330 Post Oak Boulevard (sometimes referred to as the Aon Building), the 25 story 351 ft (107m) BHP Billiton Tower (1360 Post Oak Boulevard), Wells Fargo Tower (1300 Post Oak Boulevard), and the Interfin Building (1400 Post Oak Boulevard). The buildings were designed by Cesar Pelli & Associates Architects.
In 1993 BHP Petroleum, the US subsidiary of Broken Hill Proprietary Co., announced that its U.S. headquarters was moving from San Felipe Plaza to the Cigna Tower (1360 Post Oak Blvd.). 200 clerical and professional employees moved into the building. In 1999 Cushman & Wakefield, a realty firm, moved its Houston office from the Wells Fargo Tower into the America Tower in the American General Center in Neartown. By 2008 and as of 2009 Cushman & Wakefield's Houston office is now in the 1330 Post Oak building.