PROTHENA CORPORATION PUBLIC LIMITED COMPANY financials
Source: EDGAR filings · Built 2026-06-02T03:52:42Z
Key metrics by reporting period
Up to six most-recent periods side-by-side. Rows are the curated key lines — revenue, margins, cash, debt, equity, cash-flow totals, plus the derived and valuation metrics we compute on top. For every tag a filer reported in one period, use the single-filing drilldown below.
Derived Metrics
| Concept | FY 2025 | FY 2024 | FY 2023 | FY 2022 | FY 2021 | FY 2020 |
|---|---|---|---|---|---|---|
| EBITDA | -213.75M | -153.67M | -190.11M | -130.81M | 73.09M | -111.22M |
| Working Capital | 274.35M | 436.91M | 582.39M | 668.95M | 551.36M | 273.44M |
| Net Debt | -299.16M | -460.55M | -607.00M | -703.93M | -566.77M | -277.54M |
| Operating Margin | -2216.44% | -114.36% | -209.08% | -244.05% | 35.88% | -13216.18% |
| Net Margin | -2520.57% | -90.49% | -160.91% | -216.95% | 33.39% | -13029.78% |
| Return on Equity (ROE) | -87.03% | -25.12% | -26.19% | -18.80% | 14.37% | -60.40% |
| Return on Assets (ROA) | -74.69% | -22.36% | -21.11% | -15.43% | 10.99% | -33.38% |
| Current Ratio | 7.72× | 10.01× | 11.24× | 14.34× | 17.48× | 11.58× |
| Debt-to-Equity | 0.03× | 0.02× | 0.02× | 0.01× | 0.03× | 0.10× |
| Effective Tax Rate | -21.54% | 5.13% | 8.38% | 6.89% | 6.88% | 0.25% |
| Cash Conversion Ratio | 0.67× | 1.23× | 0.91× | 0.93× | 1.38× | 0.72× |
| Accruals Ratio | -0.25× | 0.05× | -0.02× | -0.01× | -0.04× | -0.09× |
| SBC % of Revenue | 388.68% | 34.01% | 44.78% | 58.11% | 12.29% | 2580.77% |
Valuation Metrics
| Concept | FY 2025 | FY 2024 | FY 2023 | FY 2022 | FY 2021 | FY 2020 |
|---|---|---|---|---|---|---|
| P/E Trailing (Diluted) | — | — | — | — | 35.80× | — |
| EV / EBITDA | — | — | — | — | 23.78× | — |
| P/S | 53.09× | 5.52× | 21.35× | 58.24× | 11.49× | 562.08× |
| P/B | 1.83× | 1.53× | 3.48× | 5.05× | 4.95× | 2.61× |
Income Statement
| Concept | FY 2025 | FY 2024 | FY 2023 | FY 2022 | FY 2021 | FY 2020 |
|---|---|---|---|---|---|---|
| Revenue from Contract with Customer, Excluding Assessed Tax | 9.68M | 135.16M | 91.37M | 53.91M | 200.58M | 853.00K |
| Research and Development Expense | 134.85M | 222.52M | 220.57M | 135.56M | 82.28M | 74.88M |
| Operating Expenses | 224.32M | 289.72M | 282.41M | 185.46M | 128.60M | 113.59M |
| Operating Income (Loss) | -214.64M | -154.56M | -191.04M | -131.56M | 71.97M | -112.73M |
| Income Tax Expense (Benefit) | 43.26M | -6.62M | -13.45M | -8.66M | 4.95M | -283.00K |
| Net Income (Loss) Attributable to Parent | -244.09M | -122.31M | -147.03M | -116.95M | 66.97M | -111.14M |
| Earnings Per Share, Basic | $-4.53 | $-2.27 | $-2.76 | $-2.47 | $1.51 | $-2.78 |
| Weighted Average Number of Shares Outstanding, Basic | 53.83M | 53.77M | 53.22M | 47.37M | 44.23M | 39.91M |
| Earnings Per Share, Diluted | $-4.53 | $-2.27 | $-2.76 | $-2.47 | $1.38 | $-2.78 |
| Weighted Average Number of Shares Outstanding, Diluted | 53.83M | 53.77M | 53.22M | 47.37M | 48.46M | 39.91M |
Balance Sheet
| Concept | FY 2025 | FY 2024 | FY 2023 | FY 2022 | FY 2021 | FY 2020 |
|---|---|---|---|---|---|---|
| Cash and Cash Equivalents, at Carrying Value | 307.53M | 471.39M | 618.83M | 710.41M | 579.09M | 295.38M |
| Assets, Current | 315.19M | 485.41M | 639.28M | 719.10M | 584.81M | 299.28M |
| Assets | 326.80M | 547.11M | 696.38M | 758.03M | 609.37M | 332.98M |
| Liabilities, Current | 40.84M | 48.50M | 56.89M | 50.15M | 33.45M | 25.85M |
| Liabilities | 46.33M | 60.18M | 135.02M | 135.99M | 143.32M | 148.97M |
| Stockholders' Equity Attributable to Parent | 280.47M | 486.93M | 561.37M | 622.04M | 466.04M | 184.01M |
| Common Stock, Shares, Outstanding | 53.83M | 53.83M | 53.68M | 52.10M | 46.66M | 39.92M |
Cash Flow Statement
| Concept | FY 2025 | FY 2024 | FY 2023 | FY 2022 | FY 2021 | FY 2020 |
|---|---|---|---|---|---|---|
| Net Cash Provided by (Used in) Operating Activities | -163.58M | -150.05M | -133.91M | -108.82M | 92.61M | -80.36M |
| Net Cash Provided by (Used in) Investing Activities | -138.00K | -298.00K | -2.77M | -464.00K | -575.00K | -196.00K |
| Net Cash Provided by (Used in) Financing Activities | -139.00K | 1.55M | 45.10M | 241.46M | 190.33M | 215.00K |
Derived Metrics
| Concept | Q1 2026 | Q4 2025 | Q3 2025 | Q2 2025 | Q1 2025 | Q4 2024 |
|---|---|---|---|---|---|---|
| EBITDA | 30.22M | -23.98M | — | — | -65.36M | -64.68M |
| Working Capital | 306.68M | 274.35M | 288.54M | 317.67M | 387.71M | 436.91M |
| Net Debt | -321.81M | -299.16M | -321.76M | -361.65M | -407.73M | -460.55M |
| Operating Margin | 58.80% | -115252.38% | -1666.25% | -1914.39% | -2318.99% | -3056.85% |
| Net Margin | 64.05% | -102804.76% | -1513.08% | -2845.41% | -2128.54% | -2729.91% |
| Return on Equity (ROE) | 10.47% | -7.70% | -12.39% | -38.78% | -13.75% | -11.90% |
| Return on Assets (ROA) | 9.35% | -6.61% | -10.36% | -31.52% | -12.15% | -10.59% |
| Current Ratio | 10.43× | 7.72× | 6.61× | 5.68× | 9.00× | 10.01× |
| Debt-to-Equity | 0.02× | 0.03× | 0.03× | 0.03× | 0.02× | 0.02× |
| Effective Tax Rate | 0.00% | -0.05% | 1.01% | -55.34% | 1.92% | 2.60% |
| Cash Conversion Ratio | 0.88× | 1.08× | 3.84× | 0.79× | 0.89× | 0.82× |
| Accruals Ratio | 0.01× | 0.01× | 0.29× | -0.07× | -0.01× | -0.02× |
| SBC % of Revenue | 13.54% | 33685.71% | 298.10% | 280.95% | 387.16% | 495.53% |
Valuation Metrics
Income Statement
| Concept | Q1 2026 | Q4 2025 | Q3 2025 | Q2 2025 | Q1 2025 | Q4 2024 |
|---|---|---|---|---|---|---|
| Revenue from Contract with Customer, Excluding Assessed Tax | 51.08M | 21.00K | 2.42M | 4.42M | 2.83M | 2.12M |
| Research and Development Expense | 12.63M | 14.59M | 28.94M | 40.52M | 50.81M | 50.17M |
| Operating Expenses | 21.05M | 24.22M | 42.66M | 89.04M | 68.41M | 67.02M |
| Operating Income (Loss) | 30.04M | -24.20M | -40.24M | -84.62M | -65.58M | -64.90M |
| Income Tax Expense (Benefit) | 1.00K | 10.00K | -371.00K | 44.80M | -1.18M | -1.54M |
| Net Income (Loss) Attributable to Parent | 32.72M | -21.59M | -36.54M | -125.77M | -60.20M | -57.96M |
| Earnings Per Share, Basic | $0.61 | $-0.40 | $-0.68 | $-2.34 | $-1.12 | $-1.07 |
| Weighted Average Number of Shares Outstanding, Basic | 53.71M | 53.83M | 53.83M | 53.83M | 53.83M | 53.77M |
| Earnings Per Share, Diluted | $0.60 | $-0.40 | $-0.68 | $-2.34 | $-1.12 | $-1.07 |
| Weighted Average Number of Shares Outstanding, Diluted | 54.11M | 53.83M | 53.83M | 53.83M | 53.83M | 53.77M |
Balance Sheet
| Concept | Q1 2026 | Q4 2025 | Q3 2025 | Q2 2025 | Q1 2025 | Q4 2024 |
|---|---|---|---|---|---|---|
| Cash and Cash Equivalents, at Carrying Value | 329.46M | 307.53M | 330.84M | 371.44M | 417.94M | 471.39M |
| Assets, Current | 339.20M | 315.19M | 339.97M | 385.48M | 436.17M | 485.41M |
| Assets | 349.89M | 326.80M | 352.63M | 399.07M | 495.34M | 547.11M |
| Liabilities, Current | 32.52M | 40.84M | 51.44M | 67.81M | 48.46M | 48.50M |
| Liabilities | 37.28M | 46.33M | 57.64M | 74.73M | 57.66M | 60.18M |
| Stockholders' Equity Attributable to Parent | 312.62M | 280.47M | 294.99M | 324.33M | 437.68M | 486.93M |
| Common Stock, Shares, Outstanding | 53.08M | 53.83M | 53.83M | 53.83M | 53.83M | 53.83M |
Cash Flow Statement
| Concept | Q1 2026 | Q4 2025 | Q3 2025 | Q2 2025 | Q1 2025 | Q4 2024 |
|---|---|---|---|---|---|---|
| Net Cash Provided by (Used in) Operating Activities | 28.88M | -23.31M | -140.27M | -99.70M | -53.36M | -47.77M |
| Net Cash Provided by (Used in) Investing Activities | 0 | 0 | -138.00K | -128.00K | -42.00K | -43.00K |
| Net Cash Provided by (Used in) Financing Activities | -6.95M | 0 | -139.00K | -122.00K | -48.00K | -59.00K |
Raw XBRL tagging for a single filing
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Methodology
All facts on this page come straight from SEC EDGAR XBRL
company-facts filings (PRTA CIK 0001559053),
grouped by financial statement using FASB's base
us-gaap presentation taxonomy. Filers may re-parent
concepts onto different statements in their own extension
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statement than on the actual 10-K / 10-Q; custom concepts and
any we couldn't map fall into Other. Hover a
cell to see the fully-qualified concept name and the filer's
description.
For the full methodology — statement grouping, the Other bucket, derived metrics, and fact tooltips — see the methodology reference for the statement grouping, the "Other" bucket, derived metrics, and fact tooltips.