We get asked (a lot) for statistics on the YC portfolio about valuation and fundraising. Although these are very imperfect indicators of success, here they are.
All of these companies actually went through a YC batch and got their start with us (e.g. we do not include Quora).
Also, the YC application for the next batch opens tomorrow! :)
Total "valuation" of all YC companies: >$65 billion
Total money raised by all YC companies: >$7 billion
Number of YC companies worth more than $1 billion: 8 
Number of YC companies worth more than $100 million: >40
Number of companies funded by YC so far: ~940
Number of companies funded by YC that have dissolved: 177
Number of companies in the last batch: 107
Number of hardware + biotech + healthcare companies in the last batch: 32
Number of companies we offered to fund yesterday for the first YC Fellowship: 33
 This includes Twitch, which Amazon bought for ~970MM plus an earn-out.