Brandywine Realty Trust is a self-administered and self-managed real estate investment trust engaged in the acquisition, development, redevelopment, ownership, management, and operation of a portfolio of office and mixed-use properties. It owns its assets and conducts its operations through Brandywine Operating Partnership, L.P. It operates through four segments: Philadelphia Central Business District (Philadelphia CBD), Pennsylvania Suburbs, Austin, Texas, and Other. The Philadelphia CBD segment includes properties located in the City of Philadelphia, Pennsylvania. The Pennsylvania Suburbs segment includes properties in Chester, Delaware, and Montgomery counties in the Philadelphia suburbs. The Austin, Texas segment includes properties in the City of Austin, Texas. The Other segment includes properties located in the District of Columbia, Northern Virginia, Southern Maryland, Camden County, New Jersey and New Castle County, Delaware.