changing junk mail to inbox without adding names to contact list

How do I add a "junk" email so that it automatically goes to inbox without putting address in my contact list?  I don't want these addresses to clutter up my contact list.  (usually theses are emails are sent on a monthly basis from businesses, bank statements etc) I use the top tab that says "not Junk" or the one one that says "move to" but the next time I get an email from the same company it always ends up in the Junk Folder. Thanks for your help!