Get beneficial-ownership stakes (SEC Schedules 13D and 13G: holders of more than 5% of a class of shares), one row per reporting person. Query by ticker (who owns this company) or by filer_cik (what stakes does this filer hold); provide exactly one of the two. By default each stake's current state is returned; set history=true for the full amendment chain. Use type=activist for 13D stakes (intent to influence control) or type=passive for 13G stakes.