Over the last two years YC companies have raised 190 Series A’s and over $2B of capital.
From this process, YC accumulated information about every one of those rounds while working with founders all the way to the close.
YC was also working on a comprehensive Series A Guide which they released recently. @ ycombinator.com/resources/series-a-guide.
This resource collects nearly everything they have learned about Series A’s over the period of existence.
It is designed to help founders tactically and strategically plan for fundraises.