Afraid I don't own any corporate tartans, but tartan ferret gives a listing of all registered corporate tartans, which I was going to list before realizing that it's hundreds of tartans. There are some interesting tartans listed, such as Asahi (an Asian beer), The White Stripes (a popular band-they also have a hunting), and, of course, XMTS.

Of course not all tartans are registered. Here's a page with some registered and some unregistered corporate tartans: http://www.scottish-wedding-dreams.c...ate-setts.html