Growth Metrics

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

Alnylam Pharmaceuticals' Tax Rate history spans 10 years, with the latest figure at 29.31% for Q4 2025.

  • For Q4 2025, Tax Rate fell 8612.0% year-over-year to 29.31%; the TTM value through Dec 2025 reached 2.86%, down 2343.0%, while the annual FY2025 figure was 2.91%, 2338.0% down from the prior year.
  • Tax Rate reached 29.31% in Q4 2025 per ALNY's latest filing, down from 4.32% in the prior quarter.
  • In the past five years, Tax Rate ranged from a high of 56.81% in Q4 2024 to a low of 670.73% in Q1 2025.
  • Average Tax Rate over 5 years is 39.73%, with a median of 0.66% recorded in 2021.
  • Peak YoY movement for Tax Rate: surged 5695bps in 2024, then plummeted -66704bps in 2025.
  • A 5-year view of Tax Rate shows it 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 crashed by -152bps to 29.31% in 2025.
  • Per Business Quant, the three most recent readings for ALNY's Tax Rate are 29.31% (Q4 2025), 4.32% (Q3 2025), and 87.45% (Q2 2025).