Exhibit 99.A

EXHIBIT A

JOINT FILING AGREEMENT

The undersigned hereby agree that the statement on Schedule 13G with respect to the Common Stock of Exterran Holdings, Inc. dated as of February 17, 2015 is, and any amendments thereto (including amendments on Schedule 13D) signed by each of the undersigned shall be, filed on behalf of each of us pursuant to and in accordance with the previsions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.

Date: February 17, 2015	MAGNETAR FINANCIAL LLC
	By: Magnetar Capital Partners LP, its Sole Member
	By:	/s/ Alec N. Litowitz
	Name:	Alec N. Litowitz
	Title:	Manager of Supernova Management LLC, the General Partner of Magnetar Capital Partners LP
Date: February 17, 2015	MAGNETAR CAPITAL PARTNERS LP
	By: Supernova Management LLC, its General Partner
	By:	/s/ Alec N. Litowitz
	Name:	Alec N. Litowitz
	Title:	Manager of Supernova Management LLC
Date: February 17, 2015	SUPERNOVA MANAGEMENT LLC
	By:	/s/ Alec N. Litowitz
	Name:	Alec N. Litowitz
	Title:	Manager
Date: February 17, 2015	/s/ Alec N. Litowitz
	Alec N. Litowitz