Five years after Amazon announced that it would buy supermarket chain Whole Foods for $13.7 billion, a big new change has just taken place -- on September 1, incoming chief executive Jason Buechel is taking over for John Mackey. "As a co-founder of Whole Foods, I've often explained my relationship to the company with a parent-child metaphor," Buechel wrote in a letter announcing his retirement to Whole Foods Staff in September 2021. The transition took nearly a year and, now, former Chief Operating Officer Jason Buechel is stepping in to lead the high-end supermarket chain.