Data to be presented at ACR meeting Summary: Additional results from the ofatumumab Phase II study in RA will be presented at the ACR/ARHP 2008 Annual Scientific Meeting on October 26, 2008. Copenhagen, Denmark; October 8, 2008 - Genmab A/S (OMX: GEN) announced today that data showing that rheumatoid arthritis patients who participated in the ofatumumab (HuMax-CD20(R)) Phase II study achieved long lasting results at the 48 week follow up period. The data will be presented in a poster session at the ACR/ARHP 2008 Annual Scientific Meeting in San Francisco, California on October 26, 2008. The full abstract can be found at http://www.abstractsonline.com/plan/ViewAbstract.aspx?mID=2173&sKey=dce5e7b7-ccd 3-441c-97b8-23a76a10390d&cKey=16f927bb-6c7d-4766-b78d-ad9a4edcb3fc. Ofatumumab is an investigational, new generation, human monoclonal antibody that targets a distinct membrane proximal, small loop epitope (specific binding site) of the CD20 molecule on the surface of B-cells. Ofatumumab is being developed to treat chronic lymphocytic leukemia, follicular non-Hodgkin's lymphoma, diffuse large B-cell lymphoma, rheumatoid arthritis and relapsing remitting multiple sclerosis under a co-development and commercialization agreement between Genmab and GlaxoSmithKline. It is not yet approved for sale in any country. About Genmab A/S Genmab is a leading international biotechnology company focused on developing fully human antibody therapeutics for unmet medical needs. Using cutting-edge antibody technology, Genmab's world class discovery, development and manufacturing teams have created and developed an extensive pipeline of products for potential treatment of a variety of diseases including cancer and autoimmune disorders. As Genmab advances towards a commercial future, we remain committed to our primary goal of improving 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-CD4(R); HuMax-CD20(R); HuMax-EGFr(TM); HuMax-IL8(TM); HuMax-TAC(TM); HuMax-HepC(TM); HuMax-CD38(TM); HuMax-CD32b(TM) and UniBody(R) are all trademarks of Genmab A/S. Contact: Helle Husted, Sr. Director, Investor Relations, T: +45 33 44 77 30, M: +45 25 27 47 13, E: hth@genmab.com Investor News No. 10/2008 ###