Item 1(a).	Name of Issuer:
	OncoGenex Pharmaceuticals, Inc., a Delaware corporation (the “Issuer”)
Item 1(b).	Address of Issuer’s Principal Executive Offices:
	1522 217th Place SE, Suite 100, Bothell, Washington 98021
Item 2(a).	Name of Person Filing:
	This Statement on Schedule 13G (this “Statement”) is filed by Tang Capital Partners, LP (“Tang Capital Partners”); Tang Capital Management, LLC, the general partner of Tang Capital Partners (“Tang Capital Management”); and Kevin C. Tang, the manager of Tang Capital Management.
Item 2(b).	Address of Principal Business Office or, if none, Residence:
	4747 Executive Drive, Suite 510, San Diego, CA 92121
Item 2(c).	Citizenship:
	Tang Capital Partners is a Delaware limited partnership. Tang Capital Management is a Delaware limited liability company. Mr. Tang is a United States citizen.
Item 2(d).	Title of Class of Securities:
	Common Stock, par value $0.001 per share (the "Common Stock")
Item 2(e).	CUSIP Number:  68230A106
Item 3.	Not applicable.
Item 4.	Ownership.
	(a)	Amount Beneficially Owned:
		Tang Capital Partners.  Tang Capital Partners is the beneficial owner of 869,231 shares of the Issuer’s Common Stock and shares voting and dispositive power over such shares with Tang Capital Management and Kevin C. Tang.
		Tang Capital Management. Tang Capital Management, as the general partner of Tang Capital Partners, may be deemed to beneficially own the shares of the Issuer’s Common Stock beneficially owned by Tang Capital Partners.
		Kevin C. Tang.  Kevin C. Tang, as the manager of Tang Capital Management, may be deemed to beneficially own the shares of the Issuer’s Common Stock beneficially owned by Tang Capital Partners.
		Mr. Tang disclaims beneficial ownership of all shares reported herein except to the extent of his pecuniary interest therein.
	(b)	Percent of Class:
		Tang Capital Partners	5.9%
		Tang Capital Management	5.9%
		Kevin C. Tang	5.9%

	(c)	Number of shares as to which such person has:
		(i)	sole power to vote or to direct the vote:
			Tang Capital Partners	0 shares
			Tang Capital Management	0 shares
			Kevin C. Tang	0 shares
		(ii)	shared power to vote or to direct the vote:
			Tang Capital Partners	869,231 shares
			Tang Capital Management	869,231 shares
			Kevin C. Tang	869,231 shares
		(iii)	sole power to dispose or to direct the disposition of:
			Tang Capital Partners	0 shares
			Tang Capital Management	0 shares
			Kevin C. Tang	0 shares
		(iv)	shared power to dispose or to direct the disposition of:
			Tang Capital Partners	869,231 shares
			Tang Capital Management	869,231 shares
			Kevin C. Tang	869,231 shares

Item 5.	Ownership of Five Percent or Less of a Class.
	If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following:  ¨
Item 6.	Ownership of More than Five Percent on Behalf of Another Person.
	Not applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company.
	Not applicable.
Item 8.	Identification and Classification of Members of the Group.
	Not applicable.
Item 9.	Notice of Dissolution of Group.
	Not applicable.

Item 10.	Certification.
	By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

Date:	February 14, 2013
TANG CAPITAL PARTNERS, LP
By:	Tang Capital Management, LLC, its General Partner
By:	/s/ Kevin C. Tang
	Kevin C. Tang, Manager
TANG CAPITAL MANAGEMENT, LLC
By:	/s/ Kevin C. Tang
	Kevin C. Tang, Manager
/s/ Kevin C. Tang
Kevin C. Tang

 

 

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