JOINT FILING AGREEMENT
Exhibit 1
The undersigned hereby agree that the Statement on Schedule 13G, dated November 1, 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 1st day of
November, 2010.
| BOXER CAPITAL, LLC | ||||||
| By: | /s/ Xxxxx Xxxxx | |||||
| Name: | Xxxxx Xxxxx | |||||
| Title: | Authorized Signatory | |||||
| BOXER ASSET MANAGEMENT INC. | ||||||
| By: | /s/ Xxxxxxxxx X. Xxxx | |||||
| Name: | Xxxxxxxxx X. Xxxx | |||||
| Title: | Director | |||||
| MVA INVESTORS, LLC | ||||||
| By: | /s/ Xxxx Xxxxxxx | |||||
| Name: | Xxxx Xxxxxxx | |||||
| Title: | Authorized Signatory | |||||
| XXXXX XXXXX | ||||||
| By: | /s/ Xxxxx Xxxxx | |||||
| Xxxxx Xxxxx, Individually | ||||||
| XXXX XXXXXXX | ||||||
| By: | /s/ Xxxx Xxxxxxx | |||||
| Xxxx Xxxxxxx, Individually | ||||||
| XXXX XXXXXXXXXX | ||||||
| By: | /s/ Xxxx Xxxxxxxxxx | |||||
| Xxxx Xxxxxxxxxx, Individually | ||||||
| XXXXXXXXXXX XXXXXXXXX | ||||||
| By: | /s/ Xxxxxxxxxxx Xxxxxxxxx | |||||
| Xxxxxxxxxxx Xxxxxxxxx, Individually | ||||||
| XXXXXX XXXXX | ||||||
| By: | /s/ Xxxxxx Xxxxx | |||||
| Xxxxxx Xxxxx, Individually | ||||||
