Social gaming giant Zynga raised $1 billion in its initial public offering, selling 100 million shares at $10.00 each to generate the largest offering by a U.S. technology firm since Google raised $1.9 billion in 2004.

The IPO values Zynga--the company behind blockbuster titles like FarmVille and Words with Friends--at as much as $7 billion, or 6.8 times revenue in the year through Sept. 30, Bloomberg reports. Zynga will begin trading today on the Nasdaq Stock Market under the symbol ZNGA.

Zynga filed with the Securities and Exchange Commission earlier this month. "We intend to use the net proceeds to us from this offering for general corporate purposes, including working capital, game development, marketing activities and capital expenditures," the firm said in the filing. "We intend to use approximately $83.6 million of the net proceeds to satisfy tax withholding obligations related to the vesting of restricted stock units, or ZSUs, in connection with this offering. In addition, we may use a portion of the proceeds from this offering for acquisitions of or investments in complementary businesses, technologies or other assets."

Zynga first filed its IPO in July. At that time, the company reported 2010 revenues of $597.5 million, proceeds generated via in-app purchases and advertising support. The SEC filing states that social network Facebook accounted for 81 percent of its accounts receivable at the end of September.

In its original SEC filing, Zynga committed to growing its mobile presence. "We believe there is a large opportunity to extend our brand and games to mobile platforms such as Apple's iOS and Google's Android. We will continue to make our games accessible on a large number of mobile and other Internet-connected devices and invest in developing and acquiring mobile development talent, technologies and content. Our DAUs (daily active users) on mobile platforms grew more than ten-fold from November 2010 to June 2011."