Novo Nordisk Terminates Ziltivekimab HERMES and ATHENA Phase 3 Heart Failure Trials Early After DMC Rules Studies Unlikely to Succeed
Novo Nordisk (NYSE: NVO) confirmed Monday September 7, 2026 that it had informed investigators on Friday September 4 that the HERMES and ATHENA Phase 3 trials of ziltivekimab (an anti-IL-6 monoclonal antibody) would end early on the recommendation of an independent data monitoring committee that judged the studies unlikely to succeed. HERMES evaluated ziltivekimab against time to first occurrence of heart failure endpoints including cardiovascular death and heart-failure-linked hospitalisation or urgent visits; ATHENA evaluated the drug's effect on quality of life and other heart-failure-specific measures. The terminations follow the June 2026 ZEUS trial miss (chronic kidney disease plus cardiovascular disease) reported at the ESC Congress August 30, where ziltivekimab lowered inflammation markers but did not reduce major adverse cardiovascular events. A separate post-acute heart failure study of ziltivekimab remains ongoing. Novo shares finished down about 2% on the announcement day (Copenhagen trading open; NYSE closed for Labor Day), with the pediatric semaglutide win offset by the further narrowing of the company's non-GLP-1 growth options.