Goodwin Procter’s Seaport home sells for $447M

Deutsche Asset Management has closed on its $447 million acquisition of 100 Northern Ave., a 17-story office building on Fan Pier in Boston’s Seaport District, according to a Suffolk County deed.The 516,000-square-foot commercial office property is home to Goodwin Procter, Boston’s second-largest law firm.The 100 Northern office was the fifth completed building in The Fallon Co.’s Fan Pier development area, which also includes the Vertex Pharmaceuticals headquarters at 50 North