Mack-Cali Realty Corp. is a real estate investment trust that owns and operates a real estate portfolio comprised predominantly of Class A office and Office Flex properties located primarily in the Northeast. The company operates through three segments: commercial & other real estate, multi-family real estate and multi-family services. The Commercial and Other Real Estate and Multi-Family Real Estate Portfolio segments provides leasing, property management, acquisition, development, construction and tenant-related services. The Multi-Family Services segment provides similar services for third parties. Mack-Cali Realty was founded on December 11, 1997 and is headquartered in Jersey City, NJ.