Genmab Announces Net Sales of DARZALEX® (daratumumab) for First Quarter of 2022

• Net sales of DARZALEX^® in the first quarter of 2022 totaled USD 1,856 million
• Genmab receives royalties on worldwide net sales from Janssen Biotech, Inc.

COPENHAGEN, Denmark; April 19, 2022 – Genmab A/S (Nasdaq: GMAB) announced today that worldwide net trade sales of DARZALEX^® (daratumumab), including sales of the subcutaneous (SC) formulation (daratumumab and hyaluronidase-fihj, sold under the tradename DARZALEX FASPRO^® in the U.S.), as reported by Johnson & Johnson were USD 1,856 million in the first quarter of 2022. Net trade sales were USD 953 million in the U.S. and USD 903 million in the rest of the world. Genmab receives royalties on the worldwide net sales of DARZALEX, both the intravenous and SC formulations, under the exclusive worldwide license to Janssen Biotech, Inc. (Janssen) to develop, manufacture and commercialize daratumumab.

As previously announced, Janssen is reducing its royalty payments to Genmab by what it claims to be Genmab’s share of Janssen’s royalty payments to Halozyme Therapeutics, Inc. (Halozyme), cf. company announcement No. 39 of September 22, 2020. Subsequently, Genmab announced that an arbitral tribunal ruled by majority opinion that Janssen is permitted to continue reducing its royalty payments to Genmab as an offset against a share of Janssen’s royalty payments made to Halozyme, cf. company announcement No. 14 of April 8, 2022. Genmab has the right to seek review of the award, which it must do within a limited period of time. Such review should conclude with the issuance of a final award prior to the end of 2022. Genmab is currently considering its options.

Genmab has reflected the withholding by Janssen of royalty payments related to the Halozyme matter as a reduction to estimated 2022 revenue in our guidance as of February 16, 2022, and as such our 2022 financial guidance remains unchanged.

About DARZALEX^® (daratumumab)
DARZALEX^® (daratumumab) is the first monoclonal antibody (mAb) to receive U.S. Food and Drug Administration approval to treat multiple myeloma and has become a backbone therapy in the treatment of this disease. Daratumumab is being developed by Janssen Biotech, Inc. under an exclusive worldwide license to develop, manufacture and commercialize daratumumab from Genmab. The subcutaneous formulation of daratumumab (daratumumab and hyaluronidase-fihj) is the first subcutaneous CD38 antibody approved for the treatment of multiple myeloma and the first and only approved treatment for patients with light-chain (AL) amyloidosis. Daratumumab is a human IgG1k monoclonal antibody (mAb) that binds with high affinity to the CD38 molecule, which is highly expressed on the surface of multiple myeloma cells. Daratumumab triggers a person’s own immune system to attack the cancer cells, resulting in rapid tumor cell death through multiple immune-mediated mechanisms of action and through immunomodulatory effects, in addition to direct tumor cell death, via apoptosis (programmed cell death). ^{1,2,3,4,5,6,7}

Please see local country prescribing information for all labeled indication and safety information.

About Genmab
Genmab is an international biotechnology company with a core purpose to improve the lives of people with cancer. For more than 20 years, Genmab’s vision to transform cancer treatment has driven its passionate, innovative and collaborative teams to invent next-generation antibody technology platforms and leverage translational research and data sciences, fueling multiple differentiated cancer treatments that make an impact on people’s lives. To develop and deliver novel therapies to patients, Genmab has formed 20+ strategic partnerships with biotechnology and pharmaceutical companies. Genmab’s proprietary pipeline includes bispecific T-cell engagers, next-generation immune checkpoint modulators, effector function enhanced antibodies and antibody-drug conjugates.

Genmab is headquartered in Copenhagen, Denmark with locations in Utrecht, the Netherlands, Princeton, New Jersey, U.S. and Tokyo, Japan. For more information, please visit Genmab.com and follow us on Twitter.com/Genmab.