Is there a way to pull the tree/hierarchy of subsidiaries associated with a given RIC parent via the Eikon Python API, and if so what fields should be used?
Using Screener with public & private companies universe you can retrieve all the subsidiaries of an organization. Here's an example retrieving all subsidiaries of Ford Motor Co (organization PermID 4295903068).
ek.get_data('SCREEN(U(IN(Equity(active,public,private,primary))),' 'Contains(TR.UltimateParentId,"4295903068"))', ['TR.CommonName','TR.ImmediateParentId'])