Am going to hold 50% of shares in my 1st Pvt. Ltd. company while my partner have balance 50%. And in my another private limited company am going to hold 34% and my partners will have 33-33% respectively. Is there any chance to hold my shares as sole proprietorship company instead of individual? I mean, If "X" is a sole proprietorship company and "Y" and "Z" are two private limited companies, is there any chance to be company "X" as holding company of "Y" and "Z"