There are several threats that a company can face; on a broader scale, we can classify them as:
Natural Threats: These include natural disasters beyond human control, threats like a tornado, fire, floods, etc.
Man-made: These are threats where humans are the cause, like theft, hacking, etc.
Technical: These threats could be either a software bug or a server fail, or any technical failure.
Supply System: Any electric outage or short circuit kind of problem falls under this category.