What Do Groupon, RadiumOne and Tumblr Have in Common?
In Silicon Valley, there’s an elite group of companies whose valuations defy gravity. These are companies with momentum, whether real or perceived: Zynga, Twitter, Facebook and Foursquare. Add Groupon, RadiumOne, Tumblr, Cloudera and RightScale to this list. Plus, they are all in the money. Read more »
