You forgot about grayscale too since they hold huge portion of btc too.
I know about Grayscale, I have put them already in preamble, since they are custodian, not Investment institution (a bit different), but yeah, their position is massive, and their influence is huge in the market
which is also good, is that they will not go away soon, they are here to stay, their customers pay premium to join, and it sounds very good so far (2020 was a main year for them), they also have LTC, ETH trusts as well, and they are buying huge amounts for their clients
according to Grayscale website - they have 649,459,500 Shares, with 0.00094934 BTC/Share, which amounts to cca. 617k BTC (17k more than five days ago, when I wrote the main article)