PRTA
Prothena Corporation plc
NASDAQ: PRTA · HEALTHCARE · BIOTECHNOLOGY
$10.87
-5.56% today
Updated 2026-04-29
Market cap
$619.62M
P/E ratio
—
P/S ratio
63.98x
EPS (TTM)
$-4.53
Dividend yield
—
52W range
$4 – $12
Volume
0.5M
Prothena Corporation plc (PRTA) Earnings
Quarterly earnings history, analyst estimates, and stock price reaction.
EPS beat streak
4 of 8
Last 8 quarters
Avg EPS surprise
-1.8%
Last 4 quarters
Revenue YoY growth
-99.0%
Most recent quarter
EPS YoY growth
+57.7%
Most recent quarter
Earnings surprise history (last 12 quarters)
Beat estimate Missed estimate
Quarterly EPS and revenue trend
Quarterly revenue EPS (diluted)
How the stock reacts to earnings
Avg 1-day reaction
-0.2%
Last 2 reports
Positive reaction rate
50%
1 of 2 quarters
Largest single-day move
-0.8%
2025-11-10
| Report date | EPS actual | Surprise | Close before | Close after | 1-day reaction |
|---|---|---|---|---|---|
| 2026-02-12 | $-0.46 | +22.3% | $8.93 | $8.96 | +0.3% |
| 2025-11-10 | $-0.67 | -24.1% | $10.56 | $10.48 | -0.8% |
Quarterly earnings history
| Fiscal quarter ending | EPS estimate | EPS actual | Surprise | Revenue | YoY revenue |
|---|---|---|---|---|---|
| 2025-12-31 | $-0.59 | $-0.46 | +22.3% | $21000.00 | -99.0% |
| 2025-09-30 | $-0.54 | $-0.67 | -24.1% | $2.42M | +149.0% |
| 2025-06-30 | $-1.79 | $-1.73 | +3.4% | $4.42M | -96.7% |
| 2025-03-31 | $-1.03 | $-1.12 | -8.7% | $2.83M | +5556.0% |
| 2024-12-31 | $-1.04 | $-1.08 | -3.8% | $2.12M | +571.8% |
| 2024-09-30 | $-1.18 | $-1.10 | +6.8% | $970000.00 | -98.9% |
| 2024-06-30 | $-1.05 | $1.22 | +216.2% | $132.01M | +3184.7% |
| 2024-03-31 | $-1.20 | $-1.34 | -11.7% | $50000.00 | -97.7% |
| 2023-12-31 | $-1.22 | $-1.26 | -3.3% | $316000.00 | — |
| 2023-09-30 | $-0.32 | $0.38 | +218.8% | $84.87M | — |
| 2023-06-30 | $-1.00 | $-1.03 | -3.0% | $4.02M | — |
| 2023-03-31 | $-0.94 | $-0.89 | +5.3% | $2.17M | — |
Frequently asked questions
Has Prothena Corporation plc beaten earnings estimates?
Prothena Corporation plc has beaten Wall Street EPS estimates in 4 of its last 8 quarterly reports, with an average EPS surprise of -1.8% over the last 4 quarters.
How does PRTA stock react to earnings?
PRTA stock has moved an average of -0.2% in the trading day following earnings over its last 2 reports, with positive reactions in 50% of those quarters.
What is Prothena Corporation plc's revenue growth rate?
Prothena Corporation plc reported year-over-year revenue growth of -99.0% in its most recent quarter, with EPS growing +57.7% year-over-year.