 Fast-casual restaurant chain Noodles Company NASDAQ: NDLS was one of the hottest IPOs in 2013. The stock priced at 18 per share but doubled in value its first day on the stock market.Investors were initially comfortable giving the company a 1.2 billion valuation, hoping for stellar returns as the company expanded to 2,000 locations long-term. At the time of its IPO, Chipotle Mexican Grill NYSE: CMG had high average unit volumes AUV of 1.4 million, consistent annual comparable-sales growth, had just become profitable, and was primarily company-owned. 