SQL Server Audit Action Group:
        
DATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP
    
    
    
This group tracks changes of ownership on database objects including certificates, symmetric and asymmetric keys, assemblies and schemas.
This is an important audit action group because ownership changes are significant to the security of the system.
If you enable this group in a database audit specification, it will track ownership changes on database objects within that database only. If you enable this group in a server audit specification, it will track ownership changes on database objects in all databases within that SQL Server instance.
    
        LOGbinder for SQL Server
        events generated under this 
        Audit Action Group: