Winnipeg Free Press Purchases largest U.S. durum and semolina processor Supplied James Richardson International’s purchase of St. Louis-based Italgrani USA Inc. includes its milling facility and headquarters in St. Louis (shown), a merchandising office in Minneapolis and storage facilities in North Dakota. A subsidiary of Winnipeg-based Richardson International Limited has closed its acquisition of the largest durum and semolina processor in the U.S., Italgrani USA Inc. A subsidiary of Winnipeg-based Richardson International Limited has closed its acquisition of the largest durum and semolina processor in the U.S., Italgrani USA Inc. The milling facility and company headquarters is in St. Louis, Mo., and the company has storage and grain input facilities in North Dakota and a merchandising office in Minneapolis.