This is a reference to the Fortune 500 companies like Square, Tesla, and Blackrock that hold thousands of bitcoin on their balance sheet.
You can see the current tallies at https://bitcointreasuries.net/
You can see the current tallies at https://bitcointreasuries.net/
At the time I looked, MicroStrategy’s market cap is lower than the amount of bitcoin it holds. That has to be awkward if you’re an employee there.