Whole Foods CEO says brand's standards intact under Amazon

Whole Foods Market Inc will keep its quality standards if Amazon.com Inc's $13.7 billion purchase goes through -- though in the future the company might introduce a different brand with different standards, according to a filing on Monday.

"They're not stupid enough to go change that," Whole Foods Chief Executive John Mackey said in a Friday town hall, according to the filing. "We've been assured ... Over time, there could be other formats that evolve that -- that might -- wouldn't be branded Whole Foods Market, potentially, wouldn't be our standards."