Research

Apple - $460B

April 1, 1976

Steve Jobs

Steve Wozniak

Ronald Wayne

$ 108.249 billion (2011)

Microsoft - $258B

April 4, 1975

Bill Gates, Paul Allen

$ 73.72 billion (2012)

Google - $197B

September 4, 1998

Larry Page, Sergey Brin

$ 37.905 billion (2011)

Facebook - $80B

February 2004

Facebook, Inc.

$ 3.71 billion (2011)

Amazon - $49B                           

July 1994 (Went online as amazon.com in 1995)

Jeff Bezos

$ 48.07 billion (2011)

eBay - $25B

September 3, 1995

Pierre Omidyar

$ 11.651 billion (2011)

Yahoo - $19B

March 1, 1995

Jerry Yang, David Filo

4.98 billion (2011)

Zynga

Estimated Value: $11 billion

July 2007

Mark Pincus

$1.16 billion (2011)

Groupon

Estimated Value: $10 billion

November 2008

ThePoint, Inc.

$ 1.610 billion (2011)

Twitter

Estimated Value: $8 billion

March 21, 2006

Jack Dorsey, Noah Glass,
Evan Williams, Biz Stone

 $ 140 million (2010)