Brandywine Realty Trust engages in the acquisition, development, redevelopment, ownership, management, and operation of a portfolio of office, life science and lab, residential and mixed-use properties. It operates through the following segments: Philadelphia Central Business District (Philadelphia CBD), Pennsylvania Suburbs, Austin, Texas, and Other. The Philadelphia CBD segment includes properties in Philadelphia, Pennsylvania. The Pennsylvania Suburbs segment refers to the properties in Chester, Delaware, and Montgomery counties. The Austin, Texas segment focuses on properties in the City of Austin, Texas. The Other segment relates to properties located in Washington, D.C., Northern Virginia, Southern Maryland, Camden County, New Jersey and New Castle County, Delaware. The company was founded by Gerard H. Sweeney in 1986 and is headquartered in Philadelphia, PA.