PROVIDENCE, R.I.--(BUSINESS WIRE)--United Natural Foods, Inc. (Nasdaq: UNFI) (the "Company") today released preliminary unaudited net sales and earnings per diluted share for its fiscal fourth quarter and year ended August 1, 2015. The Company is also introducing fiscal 2016 guidance having completed its analysis of the impact of the early termination of a contractual customer relationship previously announced on July 20, 2015. Selected Preliminary Unaudited Financial Results For the fourth qua