Exhibit C

Joint Filing Statement

I, the undersigned, hereby express my agreement that the attached Schedule 13D (and any amendments thereto) relating to the beneficial ownership by the undersigned of the equity securities of Verastem, Inc. is filed on behalf of each of the undersigned.

Date: February 9, 2012

MPM BIOVENTURES V GP LLC

By: MPM BioVentures V LLC,
	its Managing Member
By:	/s/ Luke B. Evnin
Name: Luke B. Evnin Title: Member
MPM BIOVENTURES V LLC
By:	/s/ Luke B. Evnin
Name: Luke B. Evnin Title: Member
MPM BIOVENTURES V, L.P.
By: MPM BioVentures V GP LLC, its General Partner By: MPM BioVentures V LLC, its Managing Member
By:	/s/ Luke B. Evnin
Name: Luke B. Evnin Title: Member
MPM ASSET MANAGEMENT INVESTORS BV5 LLC
By: MPM BioVentures V LLC        Its: Manager
By:	/s/ Luke B. Evnin
Name: Luke B. Evnin Title: Member
By:	/s/ Ansbert Gadicke
Name: Ansbert Gadicke

By:	/s/ Luke B. Evnin
Name: Luke Evnin
By:	/s/ Steven St. Peter
Name: Steven St. Peter
By:	/s/ Todd Foley
Name: Todd Foley
By:	/s/ James Paul Scopa
Name: James Paul Scopa
By:	/s/ Vaughn M. Kailian
Name: Vaughn M. Kailian
By:	/s/ John Vander Vort
Name: John Vander Vort

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