Prothena Corp Public (PRTA) Common Equity (2012 - 2026)

Prothena Corp Public's Common Equity history runs 15 years deep, the most recent figure standing at $312.6 million for Q1 2026.

• On a quarterly basis, Common Equity fell 28.57% year-over-year to $312.6 million in Q1 2026; TTM through Mar 2026 was $312.6 million, a 28.57% decrease from a year earlier, with the FY2025 full-year figure at $280.5 million, down 42.4% from the prior year.
• Common Equity rose to $312.6 million in Q1 2026 per PRTA's latest filing, from $280.5 million in the prior quarter.
• Across five years, Common Equity topped out at $622.0 million in Q4 2022 and bottomed at $280.5 million in Q4 2025.
• The 5-year median for Common Equity is $486.9 million (2024), against an average of $470.4 million.
• Across the five-year window, Common Equity surged 87.09% in 2022 and slumped 44.8% in 2025, its largest moves.
• Year by year, Common Equity stood at $622.0 million in 2022, then decreased by 9.75% to $561.4 million in 2023, then decreased by 13.26% to $486.9 million in 2024, then plunged by 42.4% to $280.5 million in 2025, then grew by 11.46% to $312.6 million in 2026.
• Per Business Quant, the three latest PRTA Common Equity figures stand at $312.6 million (Q1 2026), $280.5 million (Q4 2025), and $295.0 million (Q3 2025).