This story has been updated from its publication on Feb.2, 2012. NEW YORK ( TheStreet) -- Facebook's looming IPO has shone a spotlight on the U.S. IPO market as investors gear up for the largest tech offering ever. The social networking phenomenon, which could raise up to $13.6 billion, is expected to make its public debut later this month. Facebook will list on the Nasdaq exchange under the symbol "FB" in the year's most eagerly-anticipated IPO. Last year had its share of headline-grabbing tech IPOs, which included Zynga ( ZNGA), Renren ( RENN), Groupon ( GRPN) and LinkedIn ( LNKD). All of these debuts, however, will be dwarfed by Facebook. The Menlo Park, Calif.-based firm estimates that the net proceeds from the sale of its common stock will be approximately $5.67 billion, assuming an IPO price of $31.50 per share, the midpoint of its price range. Facebook's offering will also surpass Google's ( GOOG) 2004 $1.7 billion IPO, up to this point the largest IPO from an American tech company. German semiconductor specialist Infineon Technologies, however, was another mega offering, raising $5.2 billion in its 2000 IPO. The chipmaker opted to delist from the New York Stock Exchange in 2009. Overall, 2012 looks set to be a decent year for tech companies taking the public plunge. IPO expert Renaissance Capital says that tech firms have accounted for 20 U.S. IPOs valued at more than $50 million this year, the most in any sector. Last year there were 48 tech offerings. According to Renaissance Capital's research, 2012 tech sector IPOs have generated an average first-day return of 28%. So far this year, tech companies have returned an average of 43.8% from their offer prices, compared to 8.5% in the financial sector and 2.2% in the energy sector. Although Facebook's deal size is attracting plenty of attention ahead of its IPO, there have been plenty of large non-tech offerings in recent years. We looked at the 10 largest offerings from U.S. companies, according to Dealogic.