ADC Therapeutics SA

This week brought a mix of FDA and EU approvals, layoffs, acquisitions, and clinical trial updates across the biotech sector. Ionis Pharmaceuticals secured FDA approval for TRYNGOLZA as an adjunct therapy for severe hypertriglyceridemia, while Merck received European Commission approval for Keytruda in combination with Padcev as a neoadjuvant treatment for muscle-invasive bladder cancer. Gilead's Trodelvy was cleared by the FDA for first-line metastatic triple-negative breast cancer, and Pfizer's IBRANCE won expanded approval for HR+/HER2+ metastatic breast cancer. Natera gained Japanese approval for its Signatera MRD test in colorectal cancer, and AbbVie's MAVIRET was approved in the EU for both acute and chronic Hepatitis C. Achieve Life Sciences received an FDA Complete Response Letter for its Cytisinicline NDA due to manufacturing deficiencies, though no efficacy or safety issues were raised. ADC Therapeutics announced a 17% workforce reduction as part of a strategic reorganization to focus on its ZYNLONTA lymphoma franchise. In dealmaking, Merck KGaA agreed to acquire Bio-Techne for $73 per share in cash, representing an enterprise value of $11.3 billion, while Ionis inked a licensing deal with Recordati for Zilganersen, an investigational therapy for Alexander disease. Passage Bio and Remix Therapeutics entered an all-stock merger agreement, and Boundless Bio and Serapha Bio also announced an all-stock merger. On the clinical front, IMUNON's Phase 3 OVATION 3 trial passed a safety review, Takeda's Zasocitinib showed superiority over Deucravacitinib in a Phase 3 psoriasis study, and Eledon reported positive long-term kidney transplant data for Tegoprubart. However, Pfizer's Sigvotatug vedotin missed its primary overall survival endpoint in a Phase 3 non-small cell lung cancer study, and MapLight's ML-004 failed to meet its primary endpoint in autism spectrum disorder, though it showed an irritability signal in adolescents. Definium Therapeutics reported positive Phase 3 results for DT120 ODT in major depressive disorder.

Pomerantz LLP is investigating claims on behalf of investors of ADC Therapeutics SA concerning potential securities fraud or unlawful business practices. The investigation follows ADC's June 3, 2026 announcement of topline data from its Phase 3 LOTIS-5 confirmatory trial evaluating ZYNLONTA in combination with rituximab for relapsed or refractory diffuse large B-cell lymphoma. Although the treatment extended progression-free survival by 1.4 months, 27 deaths were recorded in the Zynlonta arm compared to nine deaths in the immunotherapy arm. ADC's stock price fell $2.05 per share, or 66.56%, over the following two trading sessions to close at $1.03 per share on June 5, 2026.