After you group clients as "client composites," by creating a parent-child relationship among these clients, you can submit Eagle Insurance reports or submit the ISTAR Refresh/Validation requests at the Client composite level.
Once you establish the parent-child relationship, you can:
Submit reports at the parent third party level, to create a client level aggregate report combining values from all of the individual underlying third party clients.
Refresh ISTAR at the parent third party level, to refresh all of the underlying child clients.