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Prothena Corp Public (PRTA) Retained Earnings (2016 - 2025)

Prothena Corp Public has reported Retained Earnings over the past 14 years, most recently at -$1.3 billion for Q4 2025.

  • Quarterly results put Retained Earnings at -$1.3 billion for Q4 2025, down 17.93% from a year ago — trailing twelve months through Dec 2025 was -$1.3 billion (down 17.93% YoY), and the annual figure for FY2025 was -$1.3 billion, down 17.93%.
  • Retained Earnings for Q4 2025 was -$1.3 billion at Prothena Corp Public, up from -$1.3 billion in the prior quarter.
  • Over the last five years, Retained Earnings for PRTA hit a ceiling of -$682.9 million in Q3 2021 and a floor of -$1.3 billion in Q3 2025.
  • Median Retained Earnings over the past 5 years was -$923.5 million (2023), compared with a mean of -$960.4 million.
  • Biggest five-year swings in Retained Earnings: grew 9.23% in 2021 and later plummeted 31.93% in 2025.
  • Prothena Corp Public's Retained Earnings stood at -$716.1 million in 2021, then fell by 16.33% to -$833.0 million in 2022, then dropped by 17.65% to -$980.0 million in 2023, then fell by 12.48% to -$1.1 billion in 2024, then decreased by 17.93% to -$1.3 billion in 2025.
  • The last three reported values for Retained Earnings were -$1.3 billion (Q4 2025), -$1.3 billion (Q3 2025), and -$1.3 billion (Q2 2025) per Business Quant data.