ALTER ANY OBJECT OWNER System Privilege

Required to change the owner of a user table owned by anyone.

Grant this system privilege using the WITH ADMIN OPTION, WITH NO ADMIN OPTION, or WITH ADMIN ONLY OPTION clause. If you do not specify a clause, the default is WITH NO ADMIN OPTION.
Note: This system privilege applies to table objects only. Owners of other objects, such as procedures, materialized views, and so on, cannot be changed.
Related reference
List All System Privileges