Zynga Said to Plan IPO Valuing It at as High as $10 Billion

Zynga Inc., the biggest maker of games on Facebook, is seeking a valuation of as high as $10 billion in an initial public offering, according to two people briefed on the matter.

Zynga plans to raise about $900 million by selling stock at about $8 to $10 apiece, said one of the people, who asked not to be identified because the plans haven’t been made public. Zynga will sell 10 percent or fewer of its outstanding shares, which are scheduled to be priced on Dec. 15, the person said.