"After a widely publicized E. coli outbreak that began in August 2015, this burrito chain has staged a strong financial comeback: its stock recently hit a new all-time high near $760, and shares are up about 75% in 2019. Leadership changes — notably hiring Brian Niccol, formerly Taco Bell’s CEO — and operational shifts such as experimenting with drive-thru lanes, adding new menu items, and launching a loyalty rewards program have helped, with revenue rising nearly 14% in the first quarter and comparable-restaurant sales up roughly 10%. The rebound hasn’t erased all safety concerns — an Ohio location sickened more than 400 people (later reported as over 700), prompting lawsuits — but consumer demand for burrito bowls appears strong and the chain’s turnaround seems largely successful." - Jenny G. Zhang