UPDATE 3-Chipotle founder Ells takes over as sole CEO at burrito chain

Dec 12 (Reuters) - Chipotle Mexican Grill Inc said

founder and co-Chief Executive Steve Ells would become sole CEO,

a position he held from 1993 until 2009, after Monty Moran

stepped down following a series of food safety lapses that hit

its sales and reputation.

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