Based on your question, I know that MicroStrategy, Galaxy Digital Holdings, Marathon Digital Holdings, Tesla, and Coinbase Global are some of the of the top investors in Bitcoin, and they hold a great deal of it.
~snip~
Except for Microstrategy, all these other companies are real dwarfs with their investments considering how much they are actually worth. It seems to me that some of these companies are buying Bitcoin just to draw a little more attention to themselves, but they are far from serious investors.
As for Tesla and their great leader, some information appeared that they started buying BTC again, although some say that it might just be an accounting error.