What company owns STP?

Could you please clarify who owns STP? I've heard of STP being referenced in the cryptocurrency and finance space, but I'm not entirely sure of its ownership structure. Is STP a standalone company, or is it part of a larger conglomerate? Additionally, is there any public information available regarding the shareholders or investors behind STP? It would be great to have a concise overview of STP's ownership and its relationship with any potential parent companies or backers.