Deposits ate FDIC insured up to 250k per depositor per bank. Companies with > $250k in the bank need to take the risk that they really can lose that money into account.
Per bank and per account with different ownership categories, so if a company had multiple accounts in different ownership categories those would each be insured up to $250,000
Why would a company have different ownership categories for their accounts? Wouldn't all of their accounts be wholly owned by the company and no one else?