Banfi Vintners, the exclusive importer of Riunite in the United States, was founded in New York in 1919 by John F. Mariani, Sr. and built into America's leading wine marketer over the last four decades. The company continues to be family-owned by the founder's children and grandchildren, who are also proprietors of the Castello Banfi vineyard estate in Montalcino, Tuscany; Vigne Regali Cellars in Strevi, Piedmont; and Pacific Rim Winery in Washington's Columbia Valley.