AstraZeneca PLCAstraZeneca's ATTR-CM drug Wainua failed its late-stage trial, while competitors' therapies are already approved.
Pfizer, Alnylam Pharma, and BridgeBio Pharma saw premarket gains after AstraZeneca and Ionis Pharma announced their late-stage CARDIO-TTRansform trial for Wainua failed to meet its primary goal in patients with transthyretin-mediated amyloid cardiomyopathy, a rare and fatal heart condition. BridgeBio and Alnylam, which received FDA approval for their ATTR-CM therapies Attruby and Amvuttra in November 2024 and March 2025 respectively, rose about 15% and 18% in premarket trading, while Pfizer, whose Vyndamax generated $5.4 billion in global revenue in 2024, traded roughly 1% higher. AstraZeneca shares fell around 8% and Ionis lost about 20% following the trial miss, and the companies said they would analyze the full results to better understand the data. Intellia Therapeutics, whose gene-editing therapy nex-z is in late-stage development for ATTR-CM, added about 1%.
AstraZeneca PLCAstraZeneca's ATTR-CM drug Wainua failed its late-stage trial, while competitors' therapies are already approved.
Ionis Pharmaceuticals IncIonis's own late-stage ATTR-CM trial failed to meet primary endpoint.
Alnylam Pharmaceuticals IncAstraZeneca/Ionis ATTR-CM trial failure reduces competitive threat to Alnylam's Amvuttra.
BridgeBio Pharma IncAstraZeneca/Ionis ATTR-CM trial failure reduces competitive threat to BridgeBio's Attruby.
Pfizer IncAstraZeneca/Ionis ATTR-CM trial failure reduces competitive threat to Pfizer's Vyndamax.
Intellia Therapeutics IncIntellia's gene-editing therapy nex-z is in late-stage development for ATTR-CM; trial failure may reduce competition but also casts doubt on the class.
Regeneron Pharmaceuticals Inc