Alnylam Wins EC Nod for Label Expansion of Amvuttra for ATTR-CM

Core Insights - Alnylam Pharmaceuticals has received European Commission approval for the label expansion of its RNAi therapeutic Amvuttra to treat wild-type or hereditary transthyretin amyloidosis in adult patients with cardiomyopathy [1][9] - Year-to-date, Alnylam's stock has increased by 29.1%, significantly outperforming the industry, which has seen a decline of 0.9% [2] Approval Details - The European Commission's approval was based on positive results from the late-stage HELIOS-B study, where Amvuttra met all 10 pre-specified primary and secondary endpoints [3][9] - The HELIOS-B trial demonstrated statistically significant reductions in all-cause mortality and recurrent cardiovascular events, along with major improvements in functional capacity, health status, and heart failure symptoms [4][9] Competitive Advantage - Amvuttra is administered quarterly via subcutaneous injection, providing an advantage over existing therapies that require daily oral dosing [5] - The drug's novel RNAi mechanism allows for rapid knockdown of transthyretin (TTR), addressing the disease at its source [6] Market Impact - The approval in the EU follows similar approvals in the United States and Brazil, expanding Amvuttra's global footprint [6] - Alnylam reported better-than-expected first-quarter 2025 results, with revenue growth driven by increasing Amvuttra sales due to heightened patient demand [10][11]