The struggling coffee chain has tapped Chipotle CEO Brian Niccol to be its new chairman and CEO, effective September 9. Starbucks’ stock soared more than 13% in premarket trading, while Chipotle’s dipped 8%.

Niccol has been leading the Mexican-inspired food chain since 2018, with Starbucks saying he has set “new standards in the industry and driven significant growth and value creation,” pointing to its revenue growing nearly 800% during his tenure.