Alibaba - 23rd Most Valuable US-Listed Company. Bigger than Amazon

At the midpoint of its proposed valuation - $161 billion - Alibaba (ticker: BABA) would be the 23rd-most valuable US-listed company. Bigger than Amazon and Citigroup. Larger than Bank of America at the high end of the range.

Expected to price on Thursday, September 18 for trading on Friday, Alibaba's IPO is expected to raise $20 billion, which would make it the world's largest IPO ever.