Genmab Achieves Milestone in Arzerra Collaboration


Summary:  Genmab will receive a milestone payment of approximately DKK 116      
million from GSK for the FDA approval of Arzerra™ for the treatment of patients 
with chronic lymphocytic leukemia (CLL) refractory to fludarabine and           
alemtuzumab.                                                                    

Copenhagen, Denmark; October 27, 2009 - Genmab A/S (OMX: GEN) announced today it
has reached a milestone for Arzerra™ (ofatumumab) under the terms of its        
collaboration with GlaxoSmithKline (GSK).  A milestone payment of approximately 
DKK 116 million (approximately USD 23 million) was triggered by the FDA approval
of Arzerra for the treatment of patients with chronic lymphocytic leukemia (CLL)
that is refractory to fludarabine and alemtuzumab.                              

“The approval of Arzerra marks a key milestone for Genmab as it is our first    
antibody to reach the market.  We are happy that we can now offer a new         
treatment to these refractory CLL patients, especially as it is Genmab's goal to
develop products for life threatening and debilitating unmet medical needs,”    
said Lisa N. Drakeman, Ph.D., Chief Executive Officer of Genmab.                

Arzerra is a monoclonal antibody that causes the body's immune response to fight
against normal and cancerous B-cells.  Arzerra attaches to the small and large  
loop epitopes - on a molecule called CD20, which is found on the surface of     
B-cells, the type of cell which becomes cancerous in CLL.                       

About Genmab A/S                                                                
Genmab is a leading international biotechnology company focused on developing   
fully human antibody therapeutics for the potential treatment of cancer.        
Genmab's world class discovery, development and manufacturing teams are using   
cutting-edge technology to create and develop products to address unmet medical 
needs.  Our primary goal is to improve the lives of patients who are in urgent  
need of new treatment options.  For more information on Genmab's products and   
technology, visit www.genmab.com.                                               

This Stock Exchange Release contains forward looking statements. The words      
“believe”, “expect”, “anticipate”, “intend” and “plan” and similar expressions  
identify forward looking statements. Actual results or performance may differ   
materially from any future results or performance expressed or implied by such  
statements. The important factors that could cause our actual results or        
performance to differ materially include, among others, risks associated with   
product discovery and development, uncertainties related to the outcome and     
conduct of clinical trials including unforeseen safety issues, uncertainties    
related to product manufacturing, the lack of market acceptance of our products,
our inability to manage growth, the competitive environment in relation to our  
business area and markets, our inability to attract and retain suitably         
qualified personnel, the unenforceability or lack of protection of our patents  
and proprietary rights, our relationships with affiliated entities, changes and 
developments in technology which may render our products obsolete, and other    
factors. For a further discussion of these risks, please refer to the section   
“Risk Management” in Genmab's Annual Report, which is available on              
www.genmab.com.  Genmab does not undertake any obligation to update or revise   
forward looking statements in this Stock Exchange Release nor to confirm such   
statements in relation to actual results, unless required by law.               

Genmab(R); the Y-shaped Genmab logo(R); HuMax(R); HuMax-CD20(R); HuMax-EGFr(TM);
HuMax-IL8(TM); HuMax-TAC(TM); HuMax-HepC(TM); HuMax-CD38(TM); HuMax-CD32b(TM);  
HuMax-TF(TM); HuMax-Her2(TM); HuMax-VEGF(TM) and UniBody(R) are all trademarks  
of Genmab A/S. Arzerra(TM) is a trademark of GlaxoSmithKline.                   

Contact: Helle Husted, Vice President, Investor Relations, T: +45 33 44 77 30,  
M: +45 25 27 47 13, E: h.husted@genmab.com                                      
                                                                                
Stock Exchange Release no. 40/2009                                              

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40_arzerracllapprovalmilestone_27oct09_uk.pdf