Intellia Therapeutics (NTLA) plunges after patient death in pivotal CRISPR trial; Q3 update, analyst downgrades and what to watch next [Nov. 7, 2025]
What happened today Intellia Therapeutics (NASDAQ: NTLA) is under intense pressure after the company said the patient who experienced Grade 4 liver enzyme and bilirubin elevations in its Phase 3 MAGNITUDE study later died. In a Nov. 6 business update, CEO John Leonard said the treating physician cited “complicating comorbidities,” and Intellia is working with investigators and outside experts on a risk‑mitigation plan for nexiguran ziclumeran (nex‑z; NTLA‑2001), its in vivo CRISPR therapy for transthyretin amyloidosis (ATTR). The FDA’s clinical holds on MAGNITUDE (ATTR‑CM) and MAGNITUDE‑2 (ATTR‑PN) are still in effect pending a formal hold letter. GlobeNewswire+1 Sell‑side reaction was