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
GRANT System Privilege Statement
REVOKE System Privilege Statement
List All System Privileges