Could a company have a negative Enterprise Value? What would that mean?

How to answer

Yes. It means that the company has an extremely large cash balance, or an extremely low market capitalization (or both). You see it with: 1) Financial institutions such as banks that hold large cash balances, though Enterprise Value is generally not used for banks anyway. 2) Companies on the verge of bankruptcy whose equity value has collapsed while they still hold cash on the balance sheet. 3) Certain cash-rich companies trading below their net cash value — sometimes called "net-nets" by value investors. A negative EV is unusual and often signals special circumstances or that standard EV-based valuation may not be appropriate for that company.