From the intitial announcement of Michael becoming CEO:
* Michael Seibel will be the new CEO of YC Core, which we are now just going to call “YC”.
* I’m going to be the President of YC Group, which includes YC, YC Continuity, YC Research, and our new online class. We’ll add more organizational units over time.
Y Combinator has one president, Geoff Ralston, who is the president of YC Group, the parent organization.
It has two CEO's: Michael Seibel, who is the CEO of YC Core, the twice-a-year program YC started with, and Ali Rowghani, who is the CEO of YC Continuity, the fund that makes large investments in YC companies when they are at a growth stage.
There are 18 full-time partners, who primarily select and then work with the companies we fund.