[snowwrestler]

Corporations cannot donate money to campaigns at all, either directly or through PACs. A corporation can have a "captive" PAC whose expenses it can pay (for example, letting it operate out of their corporate offices), but all donations that pass through to a campaigh must come from individuals.

When you hear that "Company X gave money to candidates", what you're really hearing is "people who reported that they work for Company X gave money to candidates."