Arzerra Third Quarter 2010 Net Sales Figures


- Net sales of Arzerra for the third quarter of 2010 were approximately DKK 78  
million, with an expected royalty payment to Genmab of approximately DKK 15.6   
million.                                                                        

Copenhagen, Denmark; October 21, 2010 - Genmab A/S (OMX: GEN) announced today   
that the net sales for Arzerra(R) (ofatumumab) during the third quarter of 2010 
were approximately DKK 78 million (approximately USD 14 million).  Arzerra third
quarter net sales in the U.S. and the rest of the world were approximately DKK  
69.3 million (approximately USD 12.7 million) and approximately DKK 8.7 million 
(approximately USD 1.6 million) respectively.  Under the terms of the           
collaboration with GlaxoSmithKline (GSK), Genmab expects to receive a royalty   
payment of approximately DKK 15.6 million (approximately USD 2.9 million).      

Arzerra was granted accelerated approval by the FDA in October 2009, for the    
treatment of patients in the U.S. with chronic lymphocytic leukemia (CLL) that  
is refractory to fludarabine and alemtuzumab. Arzerra was launched by GSK in    
mid-November 2009. In April 2010, a conditional marketing authorization for the 
treatment of CLL in patients who are refractory to fludarabine and alemtuzumab  
was granted by the EU Commission.                                               

The conversion to USD has been made using the Danish Central Bank closing spot  
rate on September 30, 2010 of USD 1.00 = DKK 5.4601.                            

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 and development 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.                                                           

Contact:                                                                        
Helle Husted, Vice President, Investor Relations                                
T: +45 33 44 77 30, M: +45 25 27 47 13, E: h.husted@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-TF(TM);     
HuMax-Her2(TM); HuMax-Wnt(TM); HuMax-cMet(TM) and UniBody(R) are all trademarks 
of Genmab A/S. Arzerra(R) is a trademark of GlaxoSmithKline.                    

Stock Exchange Release no. 41                                                   

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41_arzerra_q3_release_uk_211010.pdf