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

Prothena Corp Public (PRTA) has 14 years of Retained Earnings data on record, last reported at -$1.3 billion in Q4 2025.

  • For Q4 2025, Retained Earnings fell 17.93% year-over-year to -$1.3 billion; the TTM value through Dec 2025 reached -$1.3 billion, down 17.93%, while the annual FY2025 figure was -$1.3 billion, 17.93% down from the prior year.
  • Retained Earnings reached -$1.3 billion in Q4 2025 per PRTA's latest filing, up from -$1.3 billion in the prior quarter.
  • Across five years, Retained Earnings topped out at -$682.9 million in Q3 2021 and bottomed at -$1.3 billion in Q3 2025.
  • Average Retained Earnings over 5 years is -$960.6 million, with a median of -$923.5 million recorded in 2023.
  • Peak YoY movement for Retained Earnings: increased 9.23% in 2021, then crashed 32.48% in 2025.
  • A 5-year view of Retained Earnings shows it stood at -$716.1 million in 2021, then decreased by 16.33% to -$833.0 million in 2022, then fell by 17.65% to -$980.0 million in 2023, then decreased by 12.48% to -$1.1 billion in 2024, then dropped by 17.93% to -$1.3 billion in 2025.
  • Per Business Quant database, its latest 3 readings for Retained Earnings were -$1.3 billion in Q4 2025, -$1.3 billion in Q3 2025, and -$1.3 billion in Q2 2025.