Exhibit 1
JOINT FILING AGREEMENT
The undersigned hereby agree that the Statement on Schedule 13G, dated February 15, 2010, 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 15th day of February, 2010.
         
  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   
 
  AARON DAVIS
 
 
  By:   /s/ Aaron Davis    
    Aaron Davis, Individually   
       
 
  NEIL REISMAN
 
 
  By:   /s/ Neil Reisman    
    Neil Reisman, Individually   
       
 
  IVAN LIEBERBURG
 
 
  By:   /s/ Ivan Lieberburg    
    Ivan Lieberburg, Individually   
       

 

 


 

         
         
  CHRISTOPHER FUGLESANG
 
 
  By:   /s/ Christopher Fuglesang    
    Christopher Fuglesang, Individually   
       
 
  JOSEPH LEWIS
 
 
  By:   /s/ Joseph Lewis    
    Joseph Lewis, Individually