Superior Industries International, Inc. (NYSE: SUP), the largest manufacturer of aluminum wheels for passenger cars and light-duty vehicles in North America, today issued the following letter to shareholders in connection with its Annual Meeting of Shareholders to be held August 15, 2014: July 28, 2014 YOUR VOTE IS IMPORTANT VOTE THE ENCLOSED WHITE PROXY CARD TODAY! Dear Fellow Shareholder: The Board of Directors of Superior Industries International, Inc. urges all shareholders to sign and return the enclosed WHITE proxy card TODAY and vote FOR ALL four of your Board’s highly qualified and very experienced nominees – Paul J. Humphries, James S. McElya, Donald J. Stebbins and Francisco S. Uranga – standing for election at the Annual Meeting of Shareholders to be held on Friday, August 15, 2014. You may also vote by phone or Internet by following the instructions on the enclosed WHITE proxy card. We also urge you to discard any blue proxy card or voting instruction card you receive from GAMCO. Even a WITHHOLD vote with respect to GAMCO’s nominees on its blue proxy card will cancel any proxy previously given to Superior. If you previously signed a blue proxy card sent to you by GAMCO, you can revoke that proxy card and vote for your Board’s recommended nominees by voting a new WHITE proxy card. Only your latest-dated proxy will count. We remain very disappointed that GAMCO is forcing upon Superior a costly and distracting proxy contest that seeks to replace three highly qualified and valued members of your Board with its own candidates, who have no executive-level manufacturing or relevant automotive industry experience whatsoever. In fact, GAMCO has not provided any arguments as to why its candidates are more qualified than Superior’s nominees to address the issues facing Superior, nor has GAMCO stated any specific concerns it has with the directors that its proxy contest would seek to replace. GAMCO has not even indicated which of the four nominees recommended by your Board it is seeking to prevent from being elected.