Who is the owner of a16z?

I'm curious, who is the owner of a16z? As a leading venture capital firm in the cryptocurrency and technology space, I'm sure there's quite a bit of intrigue surrounding their ownership structure. Are they publicly traded, or privately held? And if privately held, who are the primary stakeholders and decision-makers behind the company? It would be fascinating to learn more about the people and entities that guide this influential firm's investments and strategies.