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10-Q

Quarterly Report

PROTHENA CORPORATION PUBLIC LIMITED COMPANY PRTA

0001559053-25-000044

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Filed
Nov 6, 2025 12:00 AM ET
Period of report

On SEC.gov

Financials in this filing

Metric Period Value
Shares Outstanding Q3 2025 · Oct 31, 2025 53.83M sh
Shares Diluted Q3 2025 · Sep 30, 2025 53.83M sh
Shares Diluted Q3 2025 · Sep 30, 2025 53.83M sh
Shares Diluted Q3 2025 · Sep 30, 2024 53.79M sh
Shares Diluted Q3 2025 · Sep 30, 2024 53.76M sh
Operating Cash Flow Q3 2025 · Sep 30, 2025 −$140.27M
Operating Cash Flow Q3 2025 · Sep 30, 2024 −$102.28M
Cash And Equivalents Q3 2025 · Sep 30, 2025 $330.84M
Cash And Equivalents Q3 2025 · Dec 31, 2024 $471.39M
Cash And Equivalents Q3 2025 · Sep 30, 2024 $519.26M
Stockholders Equity Q3 2025 · Sep 30, 2025 $294.99M
Stockholders Equity Q3 2025 · Dec 31, 2024 $486.93M
Current Liabilities Q3 2025 · Sep 30, 2025 $51.44M
Current Liabilities Q3 2025 · Dec 31, 2024 $48.5M
Total Liabilities Q3 2025 · Sep 30, 2025 $57.64M
Total Liabilities Q3 2025 · Dec 31, 2024 $60.18M
Current Assets Q3 2025 · Sep 30, 2025 $339.97M
Current Assets Q3 2025 · Dec 31, 2024 $485.41M
Total Assets Q3 2025 · Sep 30, 2025 $352.63M
Total Assets Q3 2025 · Dec 31, 2024 $547.11M
Eps Diluted Q3 2025 · Sep 30, 2025 −$0.68
Eps Diluted Q3 2025 · Sep 30, 2025 −$4.13
Eps Diluted Q3 2025 · Sep 30, 2024 −$1.10
Eps Diluted Q3 2025 · Sep 30, 2024 −$1.20
Eps Basic Q3 2025 · Sep 30, 2025 −$0.68
Eps Basic Q3 2025 · Sep 30, 2025 −$4.13
Eps Basic Q3 2025 · Sep 30, 2024 −$1.10
Eps Basic Q3 2025 · Sep 30, 2024 −$1.20
Sga Expense Q3 2025 · Sep 30, 2025 $13.24M
Sga Expense Q3 2025 · Sep 30, 2025 $46.75M
Sga Expense Q3 2025 · Sep 30, 2024 $16.76M
Sga Expense Q3 2025 · Sep 30, 2024 $50.35M
Rd Expense Q3 2025 · Sep 30, 2025 $28.94M
Rd Expense Q3 2025 · Sep 30, 2025 $120.27M
Rd Expense Q3 2025 · Sep 30, 2024 $50.72M
Rd Expense Q3 2025 · Sep 30, 2024 $172.35M
Net Income Q3 2025 · Sep 30, 2025 −$36.54M
Net Income Q3 2025 · Sep 30, 2025 −$222.5M
Net Income Q3 2025 · Jun 30, 2025 −$125.77M
Net Income Q3 2025 · Mar 31, 2025 −$60.2M
Net Income Q3 2025 · Sep 30, 2024 −$59M
Net Income Q3 2025 · Sep 30, 2024 −$64.35M
Net Income Q3 2025 · Jun 30, 2024 $66.89M
Net Income Q3 2025 · Mar 31, 2024 −$72.24M
Operating Income Q3 2025 · Sep 30, 2025 −$40.24M
Operating Income Q3 2025 · Sep 30, 2025 −$190.44M
Operating Income Q3 2025 · Sep 30, 2024 −$66.51M
Operating Income Q3 2025 · Sep 30, 2024 −$89.66M
Revenue Q3 2025 · Sep 30, 2025 $2.42M
Revenue Q3 2025 · Sep 30, 2025 $9.66M
Revenue Q3 2025 · Sep 30, 2024 $970K
Revenue Q3 2025 · Sep 30, 2024 $133.03M