William Brinson CMG Chipotle Mexican 465.47 -6.83 (-1.40 %) Disclaimer Get real-time CMG charts here " Chipotle 's stock price fell 2% premarket on Tuesday. Business Insider reported late-Monday that more than 170 people said they fell ill after eating at a restaurant in Ohio. The company has closed the restaurant amid an investigation. Chipotle's stock has gained 61% this year as the company turned around a sales slump that was caused by illness outbreaks.