Copenhagen, Denmark; October 16, 2012 – Genmab A/S (OMX: GEN) announces under reference to Section 29 of the Danish Securities Trading Act that Johnson & Johnson Development Corporation (JJDC) has informed us that as of October 16, 2012 their ownership in Genmab A/S consists of 5,400,000 shares, which amounts to 10.73% of the total shares in the company. At the same time Hendrikus Hubertus Franciscus Stienstra has informed us that as of October 16, 2012 his ownership in Genmab A/S (partly through Mercurius Beleggingsmaatschappij B.V., Stimex Participatie Maatschappij B.V., De Thermen Beheer B.V. and Mosam Onroerend Goed B.V.) con
