As I noted above, nearly all private for profit corporations stay out of political funding. They do heavy lobbying of course, but they don't fund PACs of individual candidates, with few exceptions. The corporations that DO fund such things are labor unions.
Large public companies don't wany to get labeled as being partisan for obvious reasons. Their emlpoyees may contibute obviously. I know where I worked it was verboten for the company to contribute to any political campaign or group.
