Grubhub Seamless stock has been on a roll, so much so that the company saw shares rise on its most recent earnings report, largely on the good news it was forecasting solid numbers. However, with competitors looking to take international markets, including FoodPanda and HelloFresh, it isn't clear how the Chicago-based food delivery company will keep delivering on big expectations, with such low barriers to entry. What's more, its lockup expiration is coming up before its next earnings report, and some of its big-name private equity backers could look to cash out on their big deal.

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