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Consolidated Net IncomeEBITEBITDAEBTEPS (Basic)EPS (Weighted Average and Diluted)Income from Continuing OperationsIncome towards Parent CompanyNet Income towards Common StockholdersNon Operating IncomeOperating ExpensesOperating IncomeOther Non Operating IncomeOther Operating ExpensesProfit After TaxResearch & DevelopmentRevenueSelling, General & AdministrativeShares OutstandingShares Outstanding (Diluted Average)Shares Outstanding (Weighted Average)Tax ProvisionsTax Rate
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Prothena Corp Public (PRTA) Tax Rate (2016 - 2025)

Prothena Corp Public (PRTA) has 14 years of Tax Rate data on record, last reported at 0.16% in Q4 2025.

  • For Q4 2025, Tax Rate fell 275.0% year-over-year to 0.16%; the TTM value through Dec 2025 reached 21.54%, down 2668.0%, while the annual FY2025 figure was 21.54%, 2668.0% down from the prior year.
  • Tax Rate reached 0.16% in Q4 2025 per PRTA's latest filing, down from 1.01% in the prior quarter.
  • Across five years, Tax Rate topped out at 7.3% in Q2 2023 and bottomed at 89.81% in Q4 2022.
  • Average Tax Rate over 5 years is 6.92%, with a median of 1.2% recorded in 2024.
  • Peak YoY movement for Tax Rate: tumbled -8967bps in 2022, then skyrocketed 9427bps in 2023.
  • A 5-year view of Tax Rate shows it stood at 0.14% in 2021, then plummeted by -64513bps to 89.81% in 2022, then soared by 105bps to 4.46% in 2023, then crashed by -42bps to 2.6% in 2024, then plummeted by -106bps to 0.16% in 2025.
  • Per Business Quant database, its latest 3 readings for Tax Rate were 0.16% in Q4 2025, 1.01% in Q3 2025, and 55.31% in Q2 2025.