Under the decision, every stockholder in Facebook — including Zuckerberg — will receive two new shares of what it called Class C stock for every existing share. This doesn't increase the value of investors' holdings; it simply splits the stock so that one share worth, say, $100 would now become three shares, each worth about $33. The point of all this is to create a large bunch of new shares that Zuckerberg could sell off in order to fulfill his promise of giving away 99 percent of his Facebook shares to charity.