Horsehead and Shell Extend Option

  Horsehead and Shell Extend Option

Business Wire

PITTSBURGH -- December 26, 2012

Horsehead Holding Corp. (NASDAQ: ZINC), the parent company of Horsehead
Corporation, INMETCO, and Zochem, Inc., announced today that its wholly-owned
subsidiary, Horsehead Corporation, has signed an amendment to the Option &
Purchase Agreement with Shell Chemical LP that extends by six months the
period of time during which Shell can perform its evaluation of the Monaca
site.

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 currently has seven production and recycling
facilities throughout the U.S. and Canada. Visit www.horsehead.net for more
information.

Contact:

Horsehead Holding Corp.
Ali Alavi, Senior Vice President, 724-773-2212