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Prothena Corp Public (PRTA) Tax Rate: 2014-2025

Historic Tax Rate for Prothena Corp Public (PRTA) over the last 5 years, with Sep 2025 value amounting to 1.08%.

  • Prothena Corp Public's Tax Rate fell 31.00% to 1.08% in Q3 2025 from the same period last year, while for Mar 2025 it was 4.83%, marking a year-over-year decrease of 206.00%. This contributed to the annual value of 5.13% for FY2024, which is 325.00% down from last year.
  • Prothena Corp Public's Tax Rate amounted to 1.08% in Q3 2025, which was down 44.58% from 1.96% recorded in Q1 2025.
  • Over the past 5 years, Prothena Corp Public's Tax Rate peaked at 7.31% during Q2 2023, and registered a low of 1.08% during Q2 2021.
  • Moreover, its 3-year median value for Tax Rate was 2.76% (2024), whereas its average is 3.44%.
  • Per our database at Business Quant, Prothena Corp Public's Tax Rate skyrocketed by 419bps in 2023 and then slumped by 289bps in 2024.
  • Over the past 5 years, Prothena Corp Public's Tax Rate (Quarterly) stood at 1.08% in 2021, then surged by 204bps to 5.58% in 2022, then skyrocketed by 419bps to 4.45% in 2023, then plummeted by 189bps to 2.55% in 2024, then crashed by 31bps to 1.08% in 2025.
  • Its last three reported values are 1.08% in Q3 2025, 1.96% for Q1 2025, and 2.55% during Q4 2024.