EXHIBIT A JOINT REPORTING AGREEMENT

CUSIP No. ▇▇▇▇▇▇▇▇▇

EXHIBIT A
JOINT REPORTING AGREEMENT

This will confirm the agreement by and among the undersigned that the Schedule 13G filed on or about this date with respect to the beneficial ownership of the undersigned of shares of Horsehead Holding Corp. is being filed on behalf of each of the parties named below.

Dated: December 15, 2008

THE PABRAI INVESTMENT FUND II, L.P.

By: ▇▇▇▇▇ Street, LLC, Its General Partner

By: /s/ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇   ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, Chief Executive Officer

PABRAI INVESTMENT FUND 3, LTD.
		By:		/s/ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, President

THE PABRAI INVESTMENT FUND IV, L.P.
		By:		▇▇▇▇▇ Street, LLC, Its General Partner

By: /s/ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇   ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, Chief Executive Officer

▇▇▇▇▇ STREET, LLC
		By:		/s/ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, Chief Executive Officer

/s/ HARINA KAPOOR Harina Kapoor

/s/ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇