Empire State Realty OP, L.P. is the entity through which Empire State Realty Trust, Inc. conducts all of its business and owns (either directly or through subsidiaries) substantially all of its assets. Empire State Realty Trust, Inc., a leading real estate investment trust (REIT), owns, manages, operates, acquires and repositions office and retail properties in Manhattan and the greater New York metropolitan area, including the Empire State Building, the world’s most famous building.