Hacker News Reader

Actually, they are the sole investor in lots of companies - and have stated they don't mind doing that.

Two I can think of off the top are Github and Rapgenius. There are more.

There's a difference between sole investor in a specific financing round, and sole investor period. It's extremely rare that a16z is the only investor since they often don't participate in seed rounds and then try to do as much of the first equity financing round as possible.

From publicly available sources it's very clear that one of the two companies you listed has many more investors than a16z.

Reply on news.ycombinator.com