Exhibit 99.1

JOINDER AGREEMENT

This JOINDER AGREEMENT (the “Joinder”) is dated as of November 4, 2015 by and among Coppersmith Value Partners II, LP, Coppersmith Capital Partners, LLC, Coppersmith Capital Management, LLC, Jerome J. Lande, Craig Rosenblum, Scopia Long LLC, Scopia LB LLC, Scopia PX LLC, Scopia Partners LLC, Scopia Windmill Fund LP, Scopia International Master Fund LP, Scopia PX International Master Fund LP, Scopia LB International Master Fund LP, Scopia Long International Master Fund LP, Scopia Capital GP LLC, Scopia Capital Management LP, Scopia Management, Inc., Matthew Sirovich and Jeremy Mindich (collectively, the “Existing Members”) and Scopia Long QP LLC (the “New Member”).

WHEREAS, the Existing Members are parties to that certain Joint Filing Agreement dated as of August 5, 2015 (the “Agreement”), pursuant to which the Existing Members formed a “group” (as contemplated by Section 13(d) of the Securities Exchange Act of 1934, as amended) for the purpose of (i) engaging in discussions with Itron, Inc., a Washington corporation (the “Company”), regarding plans or proposals under Item 4 of Schedule 13D, (ii) taking all other action necessary to achieve the foregoing and (iii) taking any other actions the group determines to undertake in connection with their respective investment in the Company; and

WHEREAS, the New Member desires to join the group formed by the Existing Members.

NOW, THEREFORE, in consideration of the premises and of the mutual covenants and agreements of the parties herein contained, the parties hereby agree as follows:

1.         Effective immediately, the New Member is joined as a party to the Agreement.

2.         The New Member agrees to be bound by the terms of the Agreement, including the obligations of a member of the Group (as defined in the Agreement), the terms of which are incorporated herein and made a part hereof.

3.         This Joinder may be executed in counterparts, each of which shall be deemed an original and all of which, taken together, shall constitute but one and the same instrument, which may be sufficiently evidenced by one counterpart.

[Signatures appear on next page]

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed as of the day and year first above written.

COPPERSMITH VALUE PARTNERS II, LP
By:	Coppersmith Capital Partners, LLC General Partner
By:	/s/ Jerome J. Lande
	Name:	Jerome J. Lande
	Title:	Managing Member

COPPERSMITH CAPITAL PARTNERS, LLC
By:	/s/ Jerome J. Lande
	Name:	Jerome J. Lande
	Title:	Managing Member

COPPERSMITH CAPITAL MANAGEMENT, LLC
By:	/s/ Jerome J. Lande
	Name:	Jerome J. Lande
	Title:	Managing Member

/s/ Jerome J. Lande

JEROME J. LANDE

/s/ Craig Rosenblum

CRAIG ROSENBLUM

SCOPIA LONG LLC   SCOPIA LB LLC   SCOPIA PX LLC   SCOPIA PARTNERS LLC   SCOPIA LONG QP LLC   SCOPIA LONG INTERNATIONAL MASTER FUND LP SCOPIA WINDMILL FUND LP   SCOPIA INTERNATIONAL MASTER FUND LP   SCOPIA PX INTERNATIONAL MASTER FUND LP   SCOPIA LB INTERNATIONAL MASTER FUND LP

By:     Scopia Capital Management LP
Investment Manager
By:     Scopia Management, Inc.
General Partner
By:	/s/ Matthew Sirovich
	Name:	Matthew Sirovich
	Title:	Managing Director

SCOPIA CAPITAL MANAGEMENT LP
By:	Scopia Management, Inc. General Partner
By:	/s/ Matthew Sirovich
	Name:	Matthew Sirovich
	Title:	Managing Director

SCOPIA CAPITAL GP LLC			SCOPIA MANAGEMENT, INC.
By:	/s/ Matthew Sirovich		By:	/s/ Matthew Sirovich
	Name:	Matthew Sirovich		Name:	Matthew Sirovich
	Title:	Managing Member		Title:	Managing Director

/s/ Matthew Sirovich

MATTHEW SIROVICH

/s/ Jeremy Mindich

JEREMY MINDICH