Does Elon Musk own any shares in OpenAI?

I'm curious to know, does Elon Musk hold any equity in OpenAI? Given his affinity for technology and his past investments in various innovative companies, it wouldn't surprise me if he's involved in some way with this artificial intelligence research organization. However, I'm not entirely certain about this matter, and I'd appreciate it if you could clarify this for me. After all, Musk's influence and involvement in such cutting-edge projects could potentially shape the future of AI development and its applications in society. So, does Elon Musk indeed own any shares in OpenAI?