Food companies have struggled to create growth on their own, and there is little left for them to buy. : Campbell Soup CEO Denise Morrison is out, and — with that — the fifteenth CEO of a packaged food company has left their job since the beginning of 2016. The parade of departures — which includes industry Kellogg's John Bryant and Mondelez International's Irene Rosenfeld — underscores the challenges to iconic food brands that had been grocery store staples for decades.