Genmab Announces Net Sales of DARZALEX® (daratumumab) for Third Quarter of 2026

Company Announcement

Net sales of DARZALEX^{®} in the third quarter of 2026 totaled USD 4,239 million

Genmab receives royalties on worldwide net sales from Johnson & Johnson (J&J, legal entity Janssen Biotech, Inc.) COPENHAGEN, Denmark; October 13, 2026 – Genmab A/S (Nasdaq: GMAB) announced today that worldwide net trade sales of DARZALEX (daratumumab), including sales of the subcutaneous (SC) product (daratumumab and hyaluronidase-fihj, sold under the tradename DARZALEX FASPRO^{® }in the U.S.), as reported by J&J were USD 4,239 million in the third quarter of 2026. Net trade sales were USD 2,528 million in the U.S. and USD 1,711 million in the rest of the world. Genmab receives royalties on the worldwide net sales of DARZALEX, both the intravenous and SC products, under the exclusive worldwide license to J&J to develop, manufacture and commercialize daratumumab. About Genmab Genmab is an international biotechnology company dedicated to improving the lives of people with cancer and other serious diseases through innovative antibody medicines. For over 25 years, its passionate, innovative and collaborative team has advanced a broad range of antibody-based therapeutic formats, including bispecific antibodies, antibody-drug conjugates (ADCs), immune-modulating antibodies and other next-generation modalities. Genmab’s science powers eight approved antibody medicines, and the company is advancing a strong late-stage clinical pipeline, including wholly owned programs, with the goal of delivering transformative medicines to patients. Established in 1999, Genmab is headquartered in Copenhagen, Denmark, with international presence across North America, Europe and Asia Pacific. For more information, please visit Genmab.com or follow us on LinkedIn, X, Facebook and Instagram. Contact: Marisol Peron, Senior Vice President, Global Communications & Corporate Affairs T: +1 609 524 0065; E: mmp@genmab.com Andrew Carlsen, Vice President, Head of Investor Relations T: +45 3377 9558; E: acn@genmab.com This Company Announcement 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 preclinical and clinical development of products, 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 or technologies obsolete, and other factors. For a further discussion of these risks, please refer to the risk management sections in Genmab’s most recent financial reports, which are available on www.genmab.com and the risk factors included in Genmab’s most recent Annual Report on Form 20-F and other filings with the U.S. Securities and Exchange Commission (SEC), which are available at www.sec.gov. Genmab does not undertake any obligation to update or revise forward looking statements in this Company Announcement nor to confirm such statements to reflect subsequent events or circumstances after the date made or in relation to actual results, unless required by law. Genmab A/S and/or its subsidiaries own the following trademarks: Genmab^{®}; the Y-shaped Genmab logo^{®}; Genmab in combination with the Y-shaped Genmab logo^{®}; HuMax^{®}; DuoBody^{®}; HexaBody^{®}; DuoHexaBody^{®}, HexElect^{® }and KYSO^{®}. DARZALEX^{®} and DARZALEX FASPRO^{®} are trademarks of Johnson & Johnson. Company Announcement no. 42 CVR no. 2102 3884 LEI Code 529900MTJPDPE4MHJ122 Genmab A/S Carl Jacobsens Vej 30 2500 Valby Denmark Attachments 131026_CA42_DARZALEX Q3 2026 sales [1]: https://www.globenewswire.com/Tracker?data=CkKzDjUTEBJ8xAN8VVvK9fkhU18KJZK2 Spe4j7EyLu3DzTTeP-Nys0OOCDecreDUYk8a7WwRJpo8rd5axyAlcg== [2]: https://www.globenewswire.com/Tracker?data=hb_jM5Jr7rFYYIJ5eSuLBNO2V4XuGEz_ b6rzm6oVett_Sp0EjN8V4anR8fegu2JztAHAeLFmukvz_SSgPhIMSMIgWsP8iNki-SQE6B3QztMqouvK H7Lhy8QZWi4jU6m9d-wb2T7meKx0-OEcbP6dCXoXvUt_QbJ4nHoWj2_ObvU2eMFOaytNyhApWi6Dxn-e FndTsy3z4XWmhDMX3aRGe8kS-oBEkjnWXha7awd3HXmmgdmmOrJiqPp7pEYMQStz [3]: https://www.globenewswire.com/Tracker?data=wabCjibkm30f0gnxaXxhAtMmoNcrJnWE r5O4bh2hFC8-rZBVI54mOgDmPKXFjBU7cz1s_VjddkFVC4lRaz1ZkTSC3A1e3KGm98eKgoin8sIhsabj 1s8FVpMBfItLWr0RrTiPp2YsfQLS4TiV64eJh0qXFIhd2ZFQvnTN2ADGW2R7kZTo84xUiLh3JIX1Ihym CsOqqZdSNNX81wVM3j120qd7qBIMDiCnXLMYMDLKDzQ= [4]: https://www.globenewswire.com/Tracker?data=hk2j473tA9xswsSqMkQsp0lidQbUCnqf r99moqhiOxkbKYI1bqlyYDBxof-7k5KxHBUc06nvj0kL4rk5dtZGjJ39Jx9K6TZTPDcT-3OiIgWE0cgT rQxKtnQBAJCRkUY4 [5]: https://www.globenewswire.com/Tracker?data=oaRKRma1LS6Mt15dz-IWJhSIDnoZDMxT m1Z9uOcWoIbl64fmBIM7tjrZZ2wQvp4MaQK92rdIfV9ACCrOLWc_D84ZPH2jm5YCbQXF1cnNW4xmBRJg fiXnCHjMhFD7QGQ76VsRvguQDPyKVNohmJp_fw== [6]: https://www.globenewswire.com/Tracker?data=UM_h1MYxunZhjPdJpNpZrtxw5LUEdbUM x4ADIKBk-sPQfoexK5uGx1C2GpQC0boHDiWbJzBZ28vZK_tiY9bTdw== [7]: https://www.globenewswire.com/Tracker?data=byoKvHWCnx-x3jeUzktXbtAD5vecBFtP rFwfIhLYBaZmqeZwO9k8ldDo1fCp-AftICCXicwNBITpD7qbRvewVA== [8]: https://www.globenewswire.com/Tracker?data=e73e03yuKMwuFRHGJep54jbtnEY7I2pQ snFJDrBbFrHW7_Na_OOnb5Wz5cDLECToSOm_nlLeVVu-sLBE-lwnO2X7kh6E8Rmzz7U8sDYsBqg= [9]: https://www.globenewswire.com/Tracker?data=e73e03yuKMwuFRHGJep54v0O32tjEfSA LOQH_EqyG664wDyF_a4GavhlND8okSbgurNfqsM6Ebf6o1uCn8RDCwQK5BK4wUXUqwwAsioCkCE= [10]: https://ml-eu.globenewswire.com/Resource/Download/921e9da9-d7d7-4002-ae3b- f79d15a7da79