Who is Hyatt owned by?

Could you please clarify for me who the owner of Hyatt Hotels is? I'm interested in understanding the corporate structure and ownership behind this well-known hospitality brand. Is it a publicly traded company, or is it privately owned? If it's publicly traded, could you provide some insight into its major shareholders? Additionally, has there been any significant changes in ownership over the years that have impacted the company's operations or strategy? Thank you for your assistance in clarifying this matter.