NEW YORK, Jan. 31 (UPI) -- Manhattan-based burger chain Shake Shack shook up the stock market in a public debut that closed at $45.90 on Friday, nearly 120 percent higher than its IPO price of $21 the day before.
Shares of the company, which trade under the SHAK symbol, more than doubled in the first full day of trading, hitting a high of $52.50. Shake Shack founder Danny Meyer saw his 21 percent stake in the company rise to $342 million.