Who owns ZF?

Could you please clarify who exactly owns ZF? Is it a publicly traded company, or is it privately held? Are there any major shareholders or stakeholders that we should be aware of? Are there any regulatory bodies or government agencies that have any influence or oversight over ZF's operations? Additionally, is there any information publicly available about the history of ownership or any changes in ownership over the years? Understanding the ownership structure of ZF is crucial in assessing its financial stability and future prospects.