Exhibit 99.1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Statement on Schedule 13G dated February 1, 2013 (including amendments thereto) with respect to the Common Stock of A. M. Castle & Co.  This Joint Filing Agreement shall be filed as an Exhibit to such Statement.

Dated:  February 1, 2013	BAKER STREET CAPITAL L.P.
	By:	Baker Street Capital Management, LLC General Partner
	By:	/s/ Vadim Perelman
	Name:	Vadim Perelman
	Title:	Managing Member
	BAKER STREET CAPITAL MANAGEMENT, LLC
	By:	/s/ Vadim Perelman
	Name:	Vadim Perelman
	Title:	Managing Member
	/s/ Vadim Perelman
	VADIM PERELMAN