Anaptys discontinues ulcerative colitis trial after rosnilimab fails endpoints
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Anaptys Announces Phase 2 Trial of Rosnilimab Did Not Meet Primary or Secondary Endpoints at Week 12 in Moderate-to-Severe Ulcerative Colitis
November 10, 2025 9:00 AM ESTRosnilimab was safe and well tolerated with similar adverse event rates vs. placeboObserved expected pharmacology, including ~90% depletion of pathogenic T cells, however lack of adequate efficacy at Week 12 does not support further development of rosnilimab in UC and trial will be discontinued, resulting in at least $10 million in savingsWill provide update in H1 2026 on advancement of rosnilimab in RA, which would be funded by strategic or other sources of capital without diluting our royaltiesReiterating commitment to... More

