Helpful, JFWIW, here's an SEC area I used a lot back in my old days at Vickers http://www.adviserinfo.sec.gov/IAPD/Content/Search/iapd_OrgSearch.aspx You can find quite a bit of info on registered investment advisors; you can also really drill down into subsidiaries here as well. For most hedgies there's another site but I can't remember it off the top of my head.
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