Apr 17, 2013 04:43PM Form SC 13D/A SUPERIOR INDUSTRIES INTE Filed by: GAMCO INVESTORS, INC. ET AL
Apr 15, 2013 05:20PM Form SC 13D/A SUPERIOR INDUSTRIES INTE Filed by: GAMCO INVESTORS, INC. ET AL
Apr 1, 2013 05:29PM Form SC 13D/A SUPERIOR INDUSTRIES INTE Filed by: GAMCO INVESTORS, INC. ET AL