Billionaire Bill Ackman has completely cashed out of his stake in animal health company Zoetis (ZTS) . He still has more than $1 billion in burrito-maker Chipotle (CMG) , where he launched a successful activist campaign last year. Chipotle shares have climbed more than 12% this year, keeping Ackman happy. His Pershing Square PSH apparently has a hankering for food investments: it has big stakes in Restaurant Brands International (QSR) and Mondelez (MDLZ) .
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