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Alnylam Pharmaceuticals (ALNY) Tax Rate (2019 - 2025)

Alnylam Pharmaceuticals (ALNY) has disclosed Tax Rate for 10 consecutive years, with 29.31% as the latest value for Q4 2025.

  • For the quarter ending Q4 2025, Tax Rate fell 8613.0% year-over-year to 29.31%, compared with a TTM value of 2.91% through Dec 2025, down 2338.0%, and an annual FY2025 reading of 2.91%, down 2338.0% over the prior year.
  • Tax Rate was 29.31% for Q4 2025 at Alnylam Pharmaceuticals, down from 4.32% in the prior quarter.
  • Across five years, Tax Rate topped out at 56.81% in Q4 2024 and bottomed at 670.73% in Q1 2025.
  • Average Tax Rate over 5 years is 39.1%, with a median of 0.66% recorded in 2021.
  • The sharpest move saw Tax Rate surged 5695bps in 2024, then plummeted -66704bps in 2025.
  • Year by year, Tax Rate stood at 0.71% in 2021, then plummeted by -132bps to 0.23% in 2022, then skyrocketed by 42bps to 0.13% in 2023, then surged by 42846bps to 56.81% in 2024, then plummeted by -152bps to 29.31% in 2025.
  • Business Quant data shows Tax Rate for ALNY at 29.31% in Q4 2025, 4.32% in Q3 2025, and 74.85% in Q2 2025.