E-commerce giant Alibaba has filed to raise up to $1 billion in an IPO. Alibaba's F-1 filing reveals an array of staggering numbers: 11.3 billion annual orders; $248 billion total gross merchandise value for its China retail marketplaces; $37 billion for its mobile GMV; adjusted EBITDA for the nine months ending Dec. 31, 2013 was $3.8 billion, with net income at $2.85 billion. The $1 billion is most likely a placeholder; it's rumored Alibaba's IPO could be the biggest tech IPO of all time. Given that it generates more revenue than Amazon and eBay combined, the rumor may well prove true. Alibaba is backed by a host of PE and VC firms, including General Atlantic, Silver Lake, Kleiner Perkins Caufield & Byers and Sequoia Capital. Its biggest shareholders are corporations: Yahoo and SoftBank.