There are some bits of information we can gather. For example, 60 of the 500+ YC companies have exited, with total exit values of $1.08 billion, according to h

There are some bits of information we can gather. For example, 60 of the 500+ YC companies have exited, with total exit values of $1.08 billion, according to http://www.seed-db.com/accelerators/view?acceleratorid=1011 http://www.seed-db.com/accelerators/view?acceleratorid=1011 Back in 2011, pg estimated the value of the top 21 YC companies at $4.7 billion (http://ycombinator.com/nums.html http://ycombinator.com/nums.html ). EDIT: and my post is immediately obsolete, as pg has posted a current estimate in a sister comment.