Prothena Corporation plc (PRTA) Earnings History
Annual and quarterly earnings data from 2010 to 2025
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PRTA EPS Growth (CAGR)
Compound annual growth rate of diluted earnings per share
CAGR (Compound Annual Growth Rate) shows the annualized growth rate of EPS over the specified period. A higher CAGR indicates stronger earnings momentum.
PRTA Profitability Analysis
Margin trends over time
| Year | Gross Margin | Operating Margin | Net Margin |
|---|---|---|---|
| 2025 | 61.8% | -1905.8% | -2520.6% |
| 2024 | 100.0% | -114.4% | -90.5% |
| 2023 | 100.0% | -209.1% | -160.9% |
| 2022 | 100.0% | -244.1% | -217.0% |
| 2021 | 100.0% | 35.9% | 33.4% |
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Prothena Corporation plc (PRTA) Earnings Overview
As of May 7, 2026, Prothena Corporation plc (PRTA) reported trailing twelve-month net income of -$244M, reflecting -99.6% year-over-year growth. The company earned $-4.53 per diluted share over the past four quarters, with a net profit margin of -2520.6%.
Looking at the long-term picture, PRTA's historical earnings data spans multiple years. The company achieved its highest annual net income of $67M in fiscal 2021.
Prothena Corporation plc is currently reporting a net loss, though operating performance should be evaluated in the context of growth investments and industry dynamics View revenue history →
Compared to peers including FOLD (-$14M net income, -10.6% margin), RARE (-$609M net income, -85.4% margin), IONS (-$327M net income, -40.4% margin), PRTA has room to improve margins relative to the peer group. Compare PRTA vs FOLD →
PRTA Earnings vs Peers
Earnings metrics vs comparable public companies
PRTA Historical Earnings Data (2010–2025)
16 years| Fiscal Year | Net Income | YoY % | Operating Income | EPS (Diluted) | Net Margin | Op. Margin |
|---|---|---|---|---|---|---|
| 2025 | -$244M | -99.6% | -$185M | $-4.53 | -2520.6% | -1905.8% |
| 2024 | -$122M | +16.8% | -$155M | $-2.27 | -90.5% | -114.4% |
| 2023 | -$147M | -25.7% | -$191M | $-2.76 | -160.9% | -209.1% |
| 2022 | -$117M | -274.6% | -$132M | $-2.47 | -217.0% | -244.1% |
| 2021 | $67M | +160.3% | $72M | $1.38 | 33.4% | 35.9% |
| 2020 | -$111M | -43.1% | -$113M | $-2.78 | -13029.8% | -13216.2% |
| 2019 | -$78M | +50.1% | -$86M | $-1.95 | -9542.6% | -10527.9% |
| 2018 | -$156M | -1.6% | -$159M | $-3.93 | -16297.9% | -16634.0% |
| 2017 | -$153M | +4.3% | -$155M | $-4.07 | -556.8% | -564.2% |
| 2016 | -$160M | -98.6% | -$160M | $-4.66 | -15176.1% | -15121.8% |
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Start ComparisonPRTA — Frequently Asked Questions
Quick answers to the most common questions about buying PRTA stock.
Is PRTA growing earnings?
PRTA EPS fell to $-4.53, with earnings declining -99.6%. This contrasts with the 5-year CAGR of N/A. TTM net income dropped to $-244M.
What are PRTA's profit margins?
Prothena Corporation plc net margin is -2520.6%, with operating margin at -1905.8%. Below-average margins reflect competitive or cost pressures.
How consistent are PRTA's earnings?
PRTA earnings data spans 2010-2025. The declining earnings trend is -99.6% YoY. Historical data enables comparison across business cycles.