As of 12/31/2021, the top ownership by institutions were as follows:
Vanguard Group, Inc. - 8.54%
Blackrock Inc. - 7.29%
As much as I enjoy the Vanguard meme, by virtue of running lots of popular low-load index funds featured in many companies’ 401k offerings, Vanguard is probably in the top ownership of every single company in the Dow and S&P 500.
The actual owners are millions of people.