While Alibaba has built an e-commerce giant in China, a lot of interest in the U.S. is the result of a 21% stake that Yahoo has in the company thanks to a savvy investment led by Yahoo founder Jerry Yang. In the amended filing, the company said Yahoo intends to sell roughly 122 million shares. At the top end of the pricing, that would reap a windfall of more than $8 billion to Yahoo, which would continue to hold on to more than 400 million shares. Alibaba founder Jack Ma will reap himself a large initial reward of nearly $1 billion at the top end of the company's target share price range.