The European commercial property company Unibail-Rodamco announced Tuesday that it is acquiring Westfield—which owns 35 properties in the United States and the United Kingdom, including two malls in Sarasota—for $15.7 billion. Unibail-Rodamco owns and operates 69 shopping centers in cities such as Paris, Madrid, Stockholm, Amsterdam, Munich, Vienna, Warsaw and Prague. Westfield's two malls in Sarasota are the Sarasota Square mall and Westfield Siesta Key, previously known as Southgate.