Halliburton Santos and AGL have same major US shareholders

Checking who we are dealing with when we oppose CSG extraction in Australia so we thought

we would check out their shareholders. Lo and behold the same huge US vulture funds and companies in which they have a major shareholding keep popping up. Oh, they are major

shareholders of Halliburton too. They are Vanguard ,State Street and Blackrock. 
Halliburton: http://finance.yahoo.com/q/mh?s=HAL+Major+Holders
Santos:       http://investors.morningstar.com/ownership/shareholders-major.htmlt=STOSF
AGL: LINK HERE