Who is Poloniex owned by?

Could you clarify for me who the owner of Poloniex is? I've heard a lot about the cryptocurrency exchange platform, but I'm not sure who is ultimately responsible for its operations. Is it a publicly traded company, a private equity firm, or an individual? And if it's a company, could you tell me a bit about its history and any notable achievements? I'm interested in learning more about the background of this popular platform.