This valuation is a steep mark-up from the $18 billion valuation Uber obtained in June, when it raised $1.2 billion. This is a mark-up of 2.2x in about 6 months. In two previous blog posts, the $18 billion valuation was explored. Here are the links to the prior blog posts:
Is Uber Worth $18.2 Billion?:
http://www.allenlatta.com/allens-blog/is-uber-worth-182-billion
Gurley v. Damodaran on Uber's Valuation:
http://www.allenlatta.com/allens-blog/gurley-v-damodaran-on-ubers-valuation
Links:
Uber's blog post announcing the financing: http://blog.uber.com/ride-ahead
NY Times DealBook article:
http://dealbook.nytimes.com/2014/12/04/uber-files-to-sell-1-8-billion-in-new-shares/
Fortune article:
http://fortune.com/2014/12/04/uber-files-to-sell-1-8-billion-of-new-stock/