Who is the owner of a trust entity?

Could you please elaborate on the question, "Who is the owner of a trust entity?" I'm interested in understanding the legal and financial aspects of this arrangement. For instance, are the beneficiaries considered owners in any sense? Or does the trustee hold some form of ownership? Additionally, are there any specific requirements or qualifications that an owner of a trust entity must meet? Could you provide some examples of who might typically own a trust entity and why they might choose to do so? Finally, are there any potential risks or limitations associated with being an owner of a trust entity that one should be aware of? Thank you for your assistance in clarifying this matter.