IMicroStrategy is known to be one of the companies that owns a significant amount of Bitcoin. MicroStrategy, a business intelligence and software company, has been actively investing in Bitcoin as part of its treasury management strategy.
It's important to note that the ownership of Bitcoin by companies can change over time due to buying or selling activities. Other companies and institutional investors, such as Tesla and Grayscale Bitcoin Trust, have also held notable amounts of Bitcoin.
For the most up-to-date information on which company currently owns the most Bitcoin, you may want to check the latest reports, financial disclosures, or official announcements from these companies or refer to reliable cryptocurrency market data sources.