Prothena Corp Public Ltd Co(PRTA)Earnings Date, History & Expected Move
Next report date, beat rate and options-implied move
PRTA is scheduled to report on Oct 29, 2026, usually after the market closes. Analysts expect EPS of -$0.22.
EPS: Actual vs Estimate
Reported EPS against the consensus estimate, last 12 quarters.
Green beat or met, red missed, amber sources differ.
Stock Reaction After Earnings
Close-to-close move in the first session that reflected each report.
Dashed lines mark the average actual move (±3.1%).
Did the stock rise after good news?
The next-day move after each of its last 5 EPS beats and 4 misses.
In plain words: it beat expectations 5 times, but the stock still fell 1 of those 5 times.
- Aug '26Beat▲ +2.1%
- Aug '25Beat▲ +1.3%
- May '25Missed▲ +4.6%
- Feb '25Missed▲ +2.0%
- Nov '24Beat▼ -0.7%
- Aug '24Beat▲ +4.4%
- May '24Missed▼ -4.5%
- Feb '24Missed▼ -1.8%
- Nov '23Beat▲ +7.4%
Clear beats and misses with a known reaction only. What counts as a beat
Why did PRTA fall after beating earnings?
3 of PRTA's last 9 reactions went against the EPS result. What stands out in each:
PRTA beat EPS estimates in 5 quarters, and the stock still closed lower the next day 1 time.
- Nov 12, 2024EPS beat +6.8%stock -0.7% next day
Nothing in the price and estimate numbers we track stands out for this one. Guidance and management comments are not part of our data.
Rose despite an EPS miss (2 of 4)
- May 8, 2025EPS missed -8.7%stock +4.6% next day
- It had already fallen 30.8% in the 20 trading sessions before the report, so weak results may have been expected.
- Feb 20, 2025EPS missed -3.8%stock +2.0% next day
- It opened 4.3% higher as soon as trading resumed.
Patterns in estimates and prices, not confirmed causes: how we read them.
Was PRTA's earnings move already priced in?
PRTA's move in the month before each of its last 11 reports, against what it did after.
How the run-up is measured (a move of 5% or more counts as large).
Before vs after each report
Grey: the month before each of the last 11 reports. Green or red: the day after.
Past reports only. How the run-up is measured
Does PRTA hold its opening gap after earnings?
PRTA's opening move after each report and where it closed that day.
In 8 reports PRTA opened at least 1% away from the previous close. It gave back half or more of that gap by the close 4 of 8 times (50%), and fully reversed 2 times. Gaps up faded 3 of 6; gaps down recovered 1 of 2.
- Feb 19, 2026ReversedOpened +3.9%, closed -0.1%
- Nov 6, 2025HeldOpened +4.1%, closed +4.8%
- Aug 4, 2025HeldOpened +1.3%, closed +1.3%
- May 8, 2025ReversedOpened -1.1%, closed +4.6%
- Feb 20, 2025FadedOpened +4.3%, closed +2.0%
- Aug 8, 2024FadedOpened +10.0%, closed +4.4%
- May 8, 2024HeldOpened -3.0%, closed -4.5%
- Nov 2, 2023HeldOpened +10.0%, closed +7.4%
PRTA earnings history
Last 12 reported quarters with the stock's reaction.
Swipe sideways to see every column →
| Report date | Time | EPS est. | EPS actual | Surprise | 1-day move | 3-day move |
|---|---|---|---|---|---|---|
| Aug 6, 2026 | After close | -$0.38 | -$0.31 | +18.4% | +2.10% | +7.46% |
| May 7, 2026 | After close | -$0.30 | $0.68 | +326.7% | — | — |
| Feb 19, 2026 | After close | -$0.46 | -$0.46 | 0.0% | -0.11% | -0.66% |
| Nov 6, 2025 | After close | -$0.54 | -$0.67 | sources differ | +4.76% | +3.97% |
| Aug 4, 2025 | After close | -$1.79 | -$1.73 | +3.4% | +1.30% | +11.24% |
| May 8, 2025 | After close | -$1.03 | -$1.12 | -8.7% | +4.65% | +6.90% |
| Feb 20, 2025 | After close | -$1.04 | -$1.08 | -3.8% | +2.03% | -4.07% |
| Nov 12, 2024 | After close | -$1.18 | -$1.10 | +6.8% | -0.75% | -19.30% |
| Aug 8, 2024 | After close | -$1.03 | $1.22 | +218.4% | +4.42% | +1.52% |
| May 8, 2024 | After close | -$1.22 | -$1.34 | -9.8% | -4.47% | -10.07% |
| Feb 15, 2024 | After close | -$1.19 | -$1.26 | -5.9% | -1.75% | -5.15% |
| Nov 2, 2023 | After close | -$0.34 | $0.38 | +211.8% | +7.41% | +4.18% |
Consensus for the next report: EPS -$0.22, revenue $9.77M.
PRTA Earnings FAQ
Answers computed from Prothena Corp Public Ltd Co's reported history
PRTA is scheduled to report on Oct 29, 2026, usually after the market closes. Analysts expect EPS of -$0.22.
Over the last 11 quarters with a usable EPS surprise, PRTA beat the consensus estimate 6 times (55%), missed 4 and landed in line 1. It has beaten estimates in each of the last 2 counted quarters. 1 quarter where our data sources disagree on beat versus miss are shown but not counted.
Across its last 11 quarters with a measured reaction, PRTA moved an average of ±3.1% in the first session after reporting. It closed higher 64% of the time; the largest gain was 7.4% and the largest drop -4.5%.
PRTA fell in the first session after 1 of its last 5 EPS beats (20%). A beat that was already priced in, or weaker guidance, can send a stock lower.
Across its last 11 quarters with price data, PRTA moved an average of -7.3% in the 20 trading sessions before reporting and was higher in 36% of them. After a drop of 3% or more (6 quarters), it rose the next day 67% of the time, averaging +2.8%. This describes past reports; it is not a forecast.
In 8 reports PRTA opened at least 1% away from the previous close. It gave back half or more of that gap by the close 4 of 8 times (50%), and fully reversed 2 times. A fade means the opening move was partly undone during the first session.
How we calculate these numbers · PRTA: 12 reported quarters, latest Aug 6, 2026. Information only, not investment advice.
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