Alnylam Pharmaceuticals Slumps on Regulatory Scrutiny and Trial Delays as Volume Ranks 274th

On October 6, 2025, Alnylam Pharmaceuticals (ALNY) closed with a 0.95% decline, trading with a volume of $0.42 billion, ranking 274th in market activity. The biotech stock faced downward pressure amid mixed market conditions for the sector.

Recent developments highlighted regulatory scrutiny of Alnylam’s manufacturing processes, with the FDA initiating an inspection of its manufacturing facility in Massachusetts. While the company emphasized compliance, investors remained cautious about potential production delays for its flagship therapies, including Givlaari and Onpattro. Additionally, a clinical trial update for a rare disease candidate showed slower-than-expected enrollment, raising questions about timeline risks.

Analysts noted that the stock’s performance was also influenced by broader biotech sector volatility, though Alnylam’s volume remained above average. Short-term technical indicators suggested a bearish bias, with key support levels under pressure following the session’s close.

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