Alnylam bulls and bears fight it out after business-shaking guidance cut - BioSpace

Alnylam: Bulls and Bears Clash After Revenue Cut

Alnylam's recent reduced revenue guidance sent investors into a panic, but analysts remain optimistic about the biotech's future.

Alnylam's share price peaked one year ago, reaching nearly $500 per share, fueled by the success of its transthyretin-mediated amyloidosis (ATTR) franchise. However, the stock has since plummeted to around $250 following a significant revenue guidance cut in July.

The Guidance Cut:

Alnylam's management lowered its full-year revenue guidance, citing shortfalls in second-quarter sales of its lead product, Amvuttra. This raised concerns among investors about the product's market potential, especially against rival small-molecule treatments.

Analyst Reactions:

  • Stifel: The revenue cut may create a temporary credibility issue and cast doubt on Amvuttra's peak sales potential.

  • Guggenheim Securities: The guidance revision suggests a smaller-than-expected commercial opportunity, mispricing, or a shift in preference towards TTR stabilizers.

Despite these concerns, some analysts remain bullish. TD Cowen assigned a $482 price target even after the guidance cut, and BMO Capital Markets, with a $318 price target, sided with the bulls on several key debates regarding Alnylam's prospects.

Key Debates:

  1. ATTR Market Size: Alnylam bulls believe the ATTR market is substantial, while bears argue it's smaller than initially thought.

  2. Nucresiran's Value: Bulls see potential in Alnylam's next-generation RNAi candidate, nucresiran, while bears question its value.

  3. Gene Silencing's Future: Analysts disagree on whether gene silencing will become a prominent drug modality.

BMO analysts, optimistic about Alnylam's future, attribute the guidance cut to exhausted patient populations for Amvuttra, adjusting the sales ramp's trajectory rather than the overall opportunity.

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