Exhibit 1

JOINT FILING AGREEMENT

The undersigned hereby agree that the Statement on Schedule 13G, dated February 14, 2012, with respect to the shares of OncoGenex Pharmaceuticals, Inc.’s Common Stock, par value $0.001 per share, is, and any amendments thereto executed by each of us shall be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, and that this Agreement shall be included as an Exhibit to the Schedule 13G and each such amendment. Each of the undersigned agrees to be responsible for the timely filing of the Schedule 13G and any amendments thereto, and for the completeness and accuracy of the information concerning itself contained therein. This Agreement may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument.

IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the 14th day of February, 2012.

 

    BOXER CAPITAL, LLC.
    By:  

/s/ Aaron Davis

      Name: Aaron Davis
      Title: Authorized Signatory
     
    BOXER ASSET MANAGEMENT INC.
     
    By:  

/s/ Jefferson R. Voss

      Name: Jefferson R. Voss
      Title: Director
     
    MVA INVESTORS, LLC
     
    By:  

/s/ Neil Reisman

      Name: Neil Reisman
      Title: Authorized Signatory
     
    NEIL REISMAN
     
    By:  

/s/ Neil Reisman

      Neil Reisman, Individually
     
    IVAN LIEBERBURG
     
    By:  

/s/ Ivan Lieberburg

      Ivan Lieberburg, Individually
     
    JOSEPH LEWIS
     
    By:  

/s/ Joseph Lewis

     

Joseph Lewis, Individually