Horsehead Holding Corp. (NASDAQ: ZINC), announced today that it will hold its annual shareholder meeting on May 17, 2012 at a location to be determined. The record date for purposes of shares to be voted is March 30, 2012. About Horsehead Horsehead Holding Corp. (“Horsehead”) (Nasdaq: ZINC) is the parent company of Horsehead Corporation, a leading U.S. producer of specialty zinc and zinc-based products and a leading recycler of electric arc furnace dust; The International Metals Reclamation Company (“INMETCO”), a leading recycler of metals-bearing wastes and a leading processor of nickel-cadmium (NiCd) batteries in North America; and Zochem Inc., a zinc oxide producer located in Brampton, Ontario. Horsehead, headquartered in Pittsburgh, Pa., employs approximately 1,150 people and has eight facilities throughout the U.S. and Canada. Visit www.horsehead.net for more information.