Major Shareholder Announcement


Summary:  Major shareholder announcement for Genmab A/S.                        

Copenhagen, Denmark; February 5, 2009 - Genmab A/S (OMX: GEN) announces under   
reference to Section 29 of the Danish Securities Trading Act that GO Capital    
Asset Management B.V. has informed us that their ownership in Genmab A/S as of  
September 30, 2008 consisted of 2,235,969 shares, thereby falling below the 5   
percent threshold.                                                              

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 press 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 press 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); Arzerra(TM) and UniBody(R) are all
trademarks of Genmab A/S.                                                       

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. 03/2009                                              

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Attachments

03 majorshareholderannouncement_050209_uk.pdf