But does that structure confer any realistic chance of voting control by any real humans who aren't already employed by vanguard?
Funds aren't known for being voting activists.
Funds aren't known for being voting activists.
https://corporate.vanguard.com/content/corporatesite/us/en/c...
In the case of an investment fund, there's really just customer service and rate of return. If I have a good experience in those dimensions, why should I be concerned with ownership structure?
If you are not Cxx level at a company or at least in a high role with a reasonable shot of getting to a Cxx position in the near future don't put your money in the company you work for. Diversity is important in investing and the company you work for is the least diverse of all investment options since you could lose both your savings and your paycheck at the same time.