Here is an old blog post (not sure how accurate it is), but it has info on some other companies as well, http://blog.awesomezombie.com/2009/12/analyzing-y-comb

Here is an old blog post (not sure how accurate it is), but it has info on some other companies as well, http://blog.awesomezombie.com/2009/12/analyzing-y-combinator.html http://blog.awesomezombie.com/2009/12/analyzing-y-combinator... Heres the summary according to the post, * YC S05 - 1 Active /3 Failed / 2 Acquired / 2 Other * YC W06 - 5 Active /1 Failed / 2 Acquired * YC S06 - 3 Active /6 Failed / 1 Unknown * YC W07 - 5 Active /4 Failed / 4 Acquired / 2 Unknown * YC S07 - 12 Active /4 Failed / 3 Acquired * YC W08 - 9 Active /10 Failed / 1 Acquired / 1 Unknown * YC S08 - 17 Active /3 Failed / 1 Acquired / 1 Unknown * YC W09 - 14 Active /1 Failed / 1 Stealth * YC S09 - 16 Active /1 Acquired /9 Stealth