United Natural Foods (UNFI) shares ended the last trading session 7.1% higher at $16.20. The jump came on an impressive volume with a higher-than-average number of shares changing hands in the session. This compares to the stock's 12.7% gain over the past four weeks. United Natural is reaping the rewards of its transformation efforts. The company is advancing its margin improvement and cash flow generation through strategic initiatives focused on four key areas: enhancing network optimization, reducing annu ...