July 5 news. Social gaming giant Zynga has filing an initial public offering (IPO) with the US Securities and Exchange Commission (SEC) .The Company estimates aggregate initial sales of $1 billion in class A common stock.The annual income of Zynga has not reached $1 billion and the annual income of EA has already close to $4 billion. The valuation of Zynga is about $20 billion, but the valuation of EA is just $8 billion. The valuation of Zynga even more than the world’s biggest video – game company Activision Blizzard. The valuation of Activision Blizzard is $13.5 billion.