Exhibit C

JOINT FILING STATEMENT

     The undersigned hereby agree that this Schedule 13D/A with respect to the Common Stock of Poniard Pharmaceuticals, Inc. is, and any amendment thereto signed by each of the undersigned shall be, filed on behalf of each of the undersigned in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.

Dated: November 17, 2009

MPM BIOVENTURES III, L.P.			MPM BIOVENTURES III-QP, L.P.
By:	MPM BioVentures III GP, L.P.,		By:	MPM BioVentures III GP, L.P.,
	its General Partner			its General Partner
By:	MPM BioVentures III LLC,		By:	MPM BioVentures III LLC,
	its General Partner			its General Partner
By:	/s/ Luke Evnin		By:	/s/ Luke Evnin
	Name:	Luke Evnin		Name:	Luke Evnin
	Title:	Series A Member		Title:	Series A Member

MPM BIOVENTURES III PARALLEL FUND, L.P.			MPM BIOVENTURES III GMBH & CO. BETEILIGUNGS KG
By:	MPM BioVentures III GP, L.P.,		By:	MPM BioVentures III GP, L.P.,
	its General Partner			in its capacity as the Managing Limited Partner
By:	MPM BioVentures III LLC,		By:	MPM BioVentures III LLC,
	its General Partner			its General Partner
By:	/s/ Luke Evnin		By:	/s/ Luke Evnin
	Name:	Luke Evnin		Name:	Luke Evnin
	Title:	Series A Member		Title:	Series A Member

MPM ASSET MANAGEMENT INVESTORS 2005 BVIII LLC			MPM BIOVENTURES III GP, L.P.
By:	/s/ Luke Evnin		By:	MPM BioVentures III LLC, its General Partner
	Name:	Luke Evnin
	Title:	Manager	By:	/s/ Luke Evnin
				Name:	Luke Evnin
				Title:	Series A Member
MPM BIOVENTURES III LLC
By:	/s/ Luke Evnin			/s/ Luke Evnin
	Name:	Luke Evnin		Luke Evnin
	Title:	Series A Member

/s/ Ansbert Gadicke	/s/ Nicholas Galakatos
Ansbert Gadicke	Nicholas Galakatos
/s/ Michael Steinmetz	/s/ Kurt Wheeler
Michael Steinmetz	Kurt Wheeler
/s/ Nicholas Simon III	/s/ Dennis Henner
Nicholas Simon III	Dennis Henner