Venables Bell & Partners Named for Advertising Responsibilities, MullenLowe Mediahub Tapped for Media Planning and Buying DENVER, 2017-Jan-23 — /EPR Retail News/ — Chipotle Mexican Grill (NYSE: CMG) announced that it has selected two new agency partners. Venables Bell & Partners will take on advertising duties, and MullenLowe Mediahub was selected for media planning and buying. The…