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Prothena Corp Public (PRTA) Profit After Tax (2016 - 2025)

Prothena Corp Public has reported Profit After Tax over the past 14 years, most recently at -$21.6 million for Q4 2025.

  • Quarterly results put Profit After Tax at -$21.6 million for Q4 2025, up 62.75% from a year ago — trailing twelve months through Dec 2025 was -$244.1 million (down 99.57% YoY), and the annual figure for FY2025 was -$244.1 million, down 99.57%.
  • Profit After Tax for Q4 2025 was -$21.6 million at Prothena Corp Public, up from -$36.5 million in the prior quarter.
  • Over the last five years, Profit After Tax for PRTA hit a ceiling of $109.2 million in Q3 2021 and a floor of -$125.8 million in Q2 2025.
  • Median Profit After Tax over the past 5 years was -$39.0 million (2021), compared with a mean of -$28.2 million.
  • Biggest five-year swings in Profit After Tax: skyrocketed 457.28% in 2021 and later crashed 1162.78% in 2023.
  • Prothena Corp Public's Profit After Tax stood at -$33.2 million in 2021, then skyrocketed by 119.14% to $6.3 million in 2022, then crashed by 1162.78% to -$67.5 million in 2023, then increased by 14.11% to -$58.0 million in 2024, then skyrocketed by 62.75% to -$21.6 million in 2025.
  • The last three reported values for Profit After Tax were -$21.6 million (Q4 2025), -$36.5 million (Q3 2025), and -$125.8 million (Q2 2025) per Business Quant data.