Chipotle Mexican Grill (NYSE:CMG) has been one of the biggest surprises of the pandemic era for investors. Its share price has more than tripled from the low point it hit last March as sales have surged thanks to the success of the company's digital channel, which is now driving about half of its sales.

The stock reached a high of $1,579.52 last month -- only five companies in the S&P 500 have higher share prices. That's also more than triple the share price of the next-highest restaurant chain, Domino's. READ MORE