CHICAGO--(BUSINESS WIRE)--Fitch Ratings has affirmed the ratings of UnitedHealth Group Incorporated (UNH) and its insurance-company subsidiaries and removed the ratings from Rating Watch Negative. Concurrent with these ratings actions, Fitch has assigned UNH and its subsidiaries Negative Rating Outlooks. A complete list of rating actions follows at the end of this release. KEY RATING DRIVERS Fitch's decision to remove UNH and its subsidiaries (collectively UnitedHealth Group) from Rating Watch