PRTA
Prothena Corporation plc
8.80$
+2.7%
vs. previous close
Closing price · As of: Oct 9, 2026
Statements
Income Statement
All figures as the change versus the prior period, in percent. Periods without a positive comparison base stay empty.
Tick rows to compare them in a chart (up to 4)
| Line item | Q3 16 | Q4 16 | Q1 17 | Q2 17 | Q3 17 | Q4 17 | Q1 18 | Q2 18 | Q3 18 | Q4 18 | Q1 19 | Q2 19 | Q3 19 | Q4 19 | Q1 20 | Q2 20 | Q3 20 | Q4 20 | Q1 21 | Q2 21 | Q3 21 | Q4 21 | Q1 22 | Q2 22 | Q3 22 | Q4 22 | Q1 23 | Q2 23 | Q3 23 | Q4 23 | Q1 24 | Q2 24 | Q3 24 | Q4 24 | Q1 25 | Q2 25 | Q3 25 | Q4 25 | Q1 26 | Q2 26 | LTM* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| – | -40.2% | +51.5% | +10,252.1% | -99.2% | +4.6% | -0.9% | +22.9% | -8.6% | -23.9% | -4.1% | -10.2% | +22.8% | +24.9% | -44.9% | +38.3% | -19.5% | +129.3% | -55.6% | +37,444.4% | +131.7% | -99.2% | -1.6% | +13.8% | +15.6% | +3,190.9% | -95.7% | +85.3% | +2,011.6% | -99.6% | -84.2% | +263,928.0% | -99.3% | +118.9% | +33.2% | +56.3% | -45.4% | -99.1% | +243,157.1% | -98.0% | – | |
| – | +48.5% | -35.5% | +32.4% | +21.4% | -18.9% | +3.6% | -9.4% | -41.1% | -10.8% | -19.5% | -27.9% | +30.3% | +23.9% | -1.4% | +13.3% | +25.1% | -3.9% | +1.8% | -0.3% | -14.7% | +22.6% | +23.6% | +15.8% | +26.3% | -7.5% | +21.4% | +25.1% | +3.4% | +6.9% | -98.6% | +6,383.7% | – | – | – | – | – | -96.7% | -2.5% | – | – | |
| – | – | – | – | – | – | – | -13,832.6% | – | – | – | – | – | – | – | – | – | – | – | – | +210.9% | -117.2% | – | – | – | – | -426.3% | – | – | -328.5% | – | +263,928.0% | -99.3% | +118.9% | +33.2% | +56.3% | -700.1% | – | – | -98.0% | – | |
| – | +48.5% | -35.5% | +32.4% | +21.4% | -18.9% | +3.6% | -9.4% | -41.1% | -10.8% | -19.5% | -27.9% | +30.3% | +23.9% | -1.4% | +13.3% | +25.1% | -2.9% | +0.8% | -0.3% | -14.7% | +22.6% | +23.6% | +15.8% | +26.3% | -7.5% | +21.4% | +25.1% | +3.4% | +6.9% | +3.6% | -10.3% | -11.8% | -1.1% | +1.3% | -20.3% | -28.6% | -49.6% | -13.4% | -30.3% | – | |
| – | -40.5% | +12.8% | +0.7% | +14.0% | +12.9% | +1.3% | -22.7% | -16.0% | -13.1% | +23.4% | -8.3% | -4.3% | -7.3% | +20.9% | -0.9% | -2.7% | +5.4% | +12.3% | -0.8% | +8.4% | +2.1% | -3.0% | +9.4% | -7.4% | +9.5% | +4.7% | +5.6% | +14.7% | +1.8% | +3.1% | -7.7% | +3.9% | +0.5% | +4.5% | -9.6% | -16.8% | -4.5% | +0.2% | -14.0% | – | |
| – | +15.1% | -26.1% | +23.0% | +19.6% | -11.5% | +2.9% | -13.3% | -34.6% | -11.6% | -5.4% | -19.6% | +13.5% | -61.9% | +20.9% | -0.9% | -2.7% | +5.4% | +12.3% | -0.8% | +8.4% | +2.1% | -3.0% | +9.4% | -7.4% | +9.5% | +4.7% | +5.6% | +14.7% | +1.8% | +381.6% | -9.7% | -8.4% | -0.7% | +2.1% | +30.2% | -84.6% | +91.7% | -7.3% | -9.3% | – | |
| – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | +290.8% | -130.3% | – | – | – | – | – | – | – | -861.7% | – | – | -213.9% | – | – | – | – | – | – | -181.8% | – | |
| – | +89.4% | +114.0% | -0.2% | +1.6% | +0.0% | -2.3% | +1.0% | +2.1% | +0.0% | +0.0% | +145.3% | -11.4% | -22.9% | -27.5% | -84.3% | -76.0% | -76.7% | +10.0% | -27.3% | +37.5% | +9.1% | +341.7% | +1,105.7% | +199.4% | +36.2% | +151.4% | +17.6% | – | – | – | – | – | – | – | – | – | – | – | – | – | |
| – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | +291.8% | -130.3% | – | – | – | – | -569.9% | – | – | -357.3% | – | – | -192.3% | – | – | – | – | – | – | -156.8% | – | |
| – | -16.2% | -570.5% | – | – | – | -112.9% | – | – | -42.7% | -64.1% | -178.8% | – | -72.0% | +26.7% | +53.6% | -15.7% | +64.2% | +1,220.1% | -94.5% | -79.9% | +62.7% | +1,913.3% | -20.5% | +99.8% | +13.2% | -3.1% | +47.9% | -28.2% | +1.6% | -170.1% | – | – | – | – | – | -99.2% | -97.3% | -90.0% | +100.0% | – | |
| – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | +295.2% | -130.4% | – | – | – | – | -838.1% | – | – | -408.0% | – | – | -188.2% | – | – | – | – | – | – | -156.8% | – | |
| – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | +288.8% | -130.0% | – | – | – | – | -558.2% | – | – | -353.9% | – | – | -191.6% | – | – | – | – | – | – | -154.1% | – |
LTM = last twelve months (sum of the four most recent quarters).
Showing the most recent 40 periods — older statements are on file for this stock.
Data as of: October 9, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.