 In 2009, the tower's owners, Hines and Sterling American Property, forfeited ownership to their lenders after the primary tenant, multinational law firm Heller Ehrman filed for bankruptcy and defaulted on rent payments leaving property 65 percent vacant.In 2013, the building was purchased by a joint venture of Massachusetts Pension Reserves Investment Management Board and DivcoWest Properties for US$275 million.In 2015, the property was acquired by Tishman Speyer for US$380 million.