Form 8-K





Washington, D.C. 20549






Current Report Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 5, 2009



Seattle Genetics, Inc.

(Exact name of Registrant as specified in its charter)




Delaware   0-32405   91-1874389

(State or other jurisdiction of

incorporation or organization)

  (Commission File Number)  

(I.R.S. Employer

Identification No.)

21823 30th Drive SE

Bothell, Washington 98021

(Address of principal executive offices, including zip code)

(425) 527-4000

(Registrant’s telephone number, including area code)



Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):


¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)


¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)


¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))


¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))




Item 8.01 Other Events.

On October 5, 2009, Seattle Genetics, Inc. issued a press release announcing that it has discontinued the randomized, double-blind phase IIb study of dacetuzumab or placebo in combination with Rituxan® (rituximab) plus ifosfamide, carboplatin and etoposide (R-ICE) chemotherapy for patients with relapsed or refractory diffuse large B-cell lymphoma based on a determination that the study would be unlikely to meet the primary endpoint of superior complete response rate in the dacetuzumab combination arm as compared to the placebo combination arm. The trial was closed based upon a recommendation by the Independent Data Monitoring Committee following a pre-specified interim analysis conducted on Friday, October 2, 2009. The press release, dated October 5, 2009, entitled “Seattle Genetics Announces Discontinuation of Dacetuzumab Phase IIb Diffuse Large B-Cell Lymphoma Clinical Trial” is attached hereto as Exhibit 99.1 and is incorporated by reference herein.


Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.


99.1    Press Release of Seattle Genetics, Inc. dated October 5, 2009


Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.


Date: October 5, 2009     By:  

/s/    CLAY B. SIEGALL        


Clay B. Siegall

President and Chief Executive Officer



Exhibit No.




   Press Release of Seattle Genetics, Inc. dated October 5, 2009