Many large companies are holding extremely large amounts of cryptocurrencies, especially bitcoin. But the major financial institutions are still limited, most of the list above are crypto exchanges and funds.
In 2021 the list could just continue to grow of some companies would buy it for the first time as other have started to purchase it and would like to take advantage of it. Though not many would have that 10k and above but will have many companies such companies who would have 100's of quantity and keep increasing the count as and when markets dips.
I think you are right Reliable, but what we can't forget is that many individuals have +10k BTC too. Future is going to be interesting, crypto will reshape and change the economy we know, and with those changes I think we can expect changes on other fields too!
As always, the ones who get in first will have more benefits in the future! The first headlines about big companies buying bitcoin I saw in February I think, so some companies can book a nice profit already! Some of them got in late, they will have to wait for profit! By this we can see what 1 year (and less) can mean in crypto, a big difference!