Growth Metrics

Prothena Corp Public (PRTA) EBT (2016 - 2025)

Historic EBT for Prothena Corp Public (PRTA) over the last 14 years, with Q3 2025 value amounting to -$36.9 million.

  • Prothena Corp Public's EBT rose 3831.14% to -$36.9 million in Q3 2025 from the same period last year, while for Sep 2025 it was -$238.8 million, marking a year-over-year decrease of 7047.92%. This contributed to the annual value of -$128.9 million for FY2024, which is 1965.98% up from last year.
  • Per Prothena Corp Public's latest filing, its EBT stood at -$36.9 million for Q3 2025, which was up 3831.14% from -$81.0 million recorded in Q2 2025.
  • In the past 5 years, Prothena Corp Public's EBT ranged from a high of $109.2 million in Q3 2021 and a low of -$81.0 million during Q2 2025
  • Over the past 5 years, Prothena Corp Public's median EBT value was -$42.6 million (recorded in 2022), while the average stood at -$27.5 million.
  • Per our database at Business Quant, Prothena Corp Public's EBT surged by 45462.46% in 2021 and then plummeted by 221115.1% in 2023.
  • Quarter analysis of 5 years shows Prothena Corp Public's EBT stood at -$33.1 million in 2021, then skyrocketed by 110.11% to $3.3 million in 2022, then plummeted by 2211.15% to -$70.6 million in 2023, then increased by 15.74% to -$59.5 million in 2024, then skyrocketed by 37.96% to -$36.9 million in 2025.
  • Its last three reported values are -$36.9 million in Q3 2025, -$81.0 million for Q2 2025, and -$61.4 million during Q1 2025.