Kingstown Capital Partners SC 13G Gencorp Inc

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 17, 2015 (including amendments thereto) with respect to the Common Stock of GenCorp Inc.  This Joint Filing Agreement shall be filed as an Exhibit to such Statement.

Date: February 17, 2015	KINGSTOWN CAPITAL MANAGEMENT L.P.
	By:	Kingstown Management GP LLC
		its general partner
	By:	/s/ Michael Blitzer
		Michael Blitzer Managing Member

KINGSTOWN PARTNERS II, L.P.
By:	Kingstown Capital Partners, LLC
	its general partner
By:	/s/ Michael Blitzer
	Michael Blitzer Managing Member

KTOWN, LP
By:	Kingstown Capital Partners, LLC
	its general partner
By:	/s/ Michael Blitzer
	Michael Blitzer Managing Member

KINGSTOWN MANAGEMENT GP LLC
By:	/s/ Michael Blitzer
	Michael Blitzer Managing Member

KINGSTOWN CAPITAL PARTNERS, LLC
By:	/s/ Michael Blitzer
	Michael Blitzer Managing Member

KINGSTOWN PARTNERS MASTER LTD.
By:	/s/ Michael Blitzer
	Michael Blitzer Director

/s/ Michael Blitzer

MICHAEL BLITZER

/s/ Guy Shanon

GUY SHANON