What happened Shares of United Natural Foods (NYSE: UNFI), a distributor of natural foods in the U.S. and Canada, fell as much as 20.5% this week according to data from S&P Global Market Intelligence. The availability of labor was a big headwind with the company noting that it is still working to fill all of its open positions. The company spent a significant amount of time discussing this and other inflationary pressures on the call with analysts.