There is no shareholder breakdown for Vanguard publicly available, AFAIK. The list of names of familes above is speculative based on who are the wealthiest families/ancestral family funds. The logic being that the wealthiest must own it. Those (first list) names are flashed briefly during the documentary I linked (during the first half), when talking about the possible identity of Vanguard's shareholders; and then I listed the Black Nobility because there is speculation many of those families still wield untold wealth and power.

I wonder about how hidden wealth is used to control things, but the Vanguard stuff was just about what's visible and actively engaging in the markets currently - and still that ownership is hidden.