Groupon's filing didn't say whether it is looking to trade on the Nasdaq or the New York Stock Exchange.

Though its generally considered to be a second-tier player in the social networking world, beat out all the big dogs to become the first U.S.-based social network to complete an IPO.

At the end of its first day of trading, the company was valued at $9.8 billion, about three times the valuation analysts had initially projected.

That success raised a lot of eyebrows as investors and industry analysts had been eyeing that IPO as a possible bellwether for the social media industry as a whole, and .

Facebook, the largest social network in the world, is expected to file for an IPO in late 2012 or shortly thereafter.