In the U.S. most corporations can choose a 'Chapter 11 bankruptcy' if they default on their bills/debt owed. The lenders/investors get a fraction of what they're owed while the company continues to operate. Some corporations have been bailed out/went bankrupt multiple times but have been propped up by the (corrupt) government, at the expense of smaller competitors.

A corporate mining farm can restructure their operations or their debt. Somebody would be willing to buy some of their assets, at the right price. Either way, the hashrate will still remain on the network, even though the warehouse(s) changed hands.