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Ionis Pharmaceuticals (IONS) Tax Rate (2016 - 2024)

Historic Tax Rate for Ionis Pharmaceuticals (IONS) over the last 16 years, with Q3 2025 value amounting to 0.17%.

  • Ionis Pharmaceuticals' Tax Rate fell 26800.0% to 0.17% in Q3 2025 from the same period last year, while for Sep 2025 it was 0.91%, marking a year-over-year increase of 17600.0%. This contributed to the annual value of 1.34% for FY2024, which is 110000.0% up from last year.
  • Per Ionis Pharmaceuticals' latest filing, its Tax Rate stood at 0.17% for Q3 2025, which was down 26800.0% from 0.02% recorded in Q2 2025.
  • Over the past 5 years, Ionis Pharmaceuticals' Tax Rate peaked at 2.51% during Q3 2024, and registered a low of 185.12% during Q4 2023.
  • In the last 5 years, Ionis Pharmaceuticals' Tax Rate had a median value of 0.17% in 2025 and averaged 11.95%.
  • As far as peak fluctuations go, Ionis Pharmaceuticals' Tax Rate soared by 19784300bps in 2021, and later tumbled by -1670600bps in 2023.
  • Quarter analysis of 5 years shows Ionis Pharmaceuticals' Tax Rate stood at 0.16% in 2021, then tumbled by -11700bps to 18.07% in 2022, then plummeted by -925bps to 185.12% in 2023, then surged by 101bps to 2.48% in 2024, then tumbled by -107bps to 0.17% in 2025.
  • Its Tax Rate stands at 0.17% for Q3 2025, versus 0.02% for Q2 2025 and 0.08% for Q1 2025.