What do you think "evil" means? In the real world, there's no one holding up a platonic ideal of moral action and swearing to do the opposite, like some comic book antagonist. Real world evil is acting with complete amorality, because if you don't care about right or wrong in your pursuit of some goal, you inevitably will do some heinous shit.

That's not to say corporations don't come awfully close to the comic book concept of evil. By definition, a corporation's prime purpose is an uncaring commitment to making money, and if you've gone public, making all the money. That's awfully close to being the opposite of the "good" ideals of generosity and kindness.