What Are Prothena Corporation plc's Key Financial Figures?
| Fiscal year | FY2025 ended December 31, 2025 | FY2024 ended December 31, 2024 | FY2023 ended December 31, 2023 | FY2022 ended December 31, 2022 |
|---|---|---|---|---|
| Revenue | $10 million | $135 million | $91 million | $54 million |
| Operating income | -$215 million | -$155 million | -$191 million | -$132 million |
| Operating margin | -2216.4% | -114.4% | -209.1% | -244.1% |
| Net income | -$244 million | -$122 million | -$147 million | -$117 million |
| Net margin | -2520.6% | -90.5% | -160.9% | -217.0% |
| Operating cash flow | -$164 million | -$150 million | -$134 million | -$109 million |
| Capital expenditures | Not reported | Not reported | Not reported | Not reported |
| Free cash flow | Not reported | Not reported | Not reported | Not reported |
Operating margin narrowed by 2102.1 percentage points between fiscal 2024 and 2025, which separates pricing and cost discipline from revenue growth alone.
What Does Prothena Corporation plc's Balance Sheet Show?
| Cash and cash equivalents | $308 million |
|---|---|
| Long-term debt | Not reported |
| Total assets | $327 million |
| Total liabilities | $46 million |
| Shareholders' equity | $280 million |
| Current ratio | 7.7x |
Balance sheet values are as of the end of fiscal 2025. Income statement figures describe a whole year; balance sheet figures describe a single day, so the two answer different questions.
Where These Numbers Come From
Every figure on this page is a value Prothena Corporation plc reported in its own SEC filings, read from the SEC's XBRL data (accession 0001559053-26-000008 for fiscal year 2025). Ratios are computed from those reported values. Figures were retrieved on October 7, 2026; a later amendment or a new annual report can change them, and the filing itself always takes precedence over this summary.
Each fiscal year is labeled by the calendar year in which it ended, so a company that names the same period differently in its own filings (many retailers whose year ends in January) may use another label. A year is left out of the table when the SEC data set holds no value for it. A figure shown as "Not reported" means the company did not file a value under the standard tag Swoopr reads, not that the amount was zero. This page is educational and describes reported history only; it is not a forecast or a recommendation.
Frequently Asked Questions
What was Prothena Corporation plc's revenue in fiscal 2025?
Prothena Corporation plc reported revenue of $10 million for the fiscal year ended December 31, 2025, according to its SEC filings.
What is Prothena Corporation plc's operating margin?
Prothena Corporation plc's operating margin was -2216.4% in fiscal 2025: operating income of -$215 million on revenue of $10 million.
How much free cash flow did Prothena Corporation plc generate?
Prothena Corporation plc did not report both operating cash flow and capital expenditures under the standard tags for fiscal 2025, so free cash flow is not computed here.