Sorry, but no.  It only limits readers to that specific category.  Yes, there will be redundacy in the entire community but the problem is "Anyone can edit", so when something new gets put in, it can create redundacy.  It happens.  But in this case, it was not needed.  * helps expand the readers view of the entire company and their subsidaries as well especially related sectors if they want to research it more.  However you do a google search with "Northrop Grumman +wiki", the first result of that page will be obviously Northrop Grumman, not *.  Why?  They're expecting the main page of Northrop Grumman.  If the first page yields no result, then they're going to hit the back button and go find another site out there that'll help them.