Hollis Johnson Chipotle Mexican Grill first-quarter earnings beat estimates. Same store sales grew by 2.2%, surpassing the 1.3% estimate. The board approved additional share buybacks of up to $100 million. Watch Chipotle's stock price in real-time here. Chipotle Mexican Grill shares soared more than 10% in after-hours trading Tuesday after the company beat on earnings, showed an improvement in same store sales, and announced it was allocating more money to buy back stock.