Here is some good data by CB Insights regarding the rise of U.S.-based e-commerce startups in exit activity.
"US-based companies have dominated Internet eCommerce Exits since 2009 with over 60% worldwide exit share in 4 of the last 5 years."
Click here to read the full article:
http://www.cbinsights.com/blog/diversification-internet-ecommerce-exits-dominated-united-states