PRTA

Prothena Corp Public Ltd Co
8.29 -2.13% 2026-11-02

Last 90d 10 insider buys worth $9M

52-week range
7.73 11.80
1-month-0.8%
3-month-2.4%
1-year-20.9%
3-year-75.5%
5-year-86.8%
vs 50-day-5.2%
vs 200-day-10.2%
Volatility48%
Beta0.94
$ vol/day$5M
ATH79.75
From ATH-89.6%
Next report2026-11-05
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2026AprJulOct

bought sold · bigger dot, bigger trade · follows the chart’s range

WhenPeople SizeValuePrice
8d buy 1 $1,222,045 8.35
19d buy 1 $920,049 8.54
25d buy 1 $1,821,054 8.91
28d buy 1 $857,240 8.04
1mo buy 1 $1,405,674 8.68
1mo buy 1 $889,872 8.70
1mo buy 1 $843,460 8.63
2mo buy 1 $255,739 9.64
2mo buy 1 $439,430 9.30
3mo buy 1 $323,220 8.85
3mo sched 2 $135,975 8.41
5mo buy 1 $158,000 8.84
5mo buy 1 $1,021,250 8.34
5mo buy 1 $465,500 9.01
5mo buy 1 $471,500 8.97
5mo buy 1 $981,000 9.76
1.5y sell 1 $50,825,217 8.07
1.5y buy 1 $2,750,239 8.88
2.8y sched 1 $170,000 33.41
2.9y sched 1 $185,958 36.93
2.9y sched 1 $170,000 33.09
3.0y sched 1 $205,179 41.02
3.1y sched 1 $186,977 47.72
3.1y sched 1 $233,067 46.66
3.1y sched 1 $236,862 47.88
3.1y sched 1 $261,800 52.61
3.1y sched 2 $332,935 55.00
3.2y sched 1 $273,803 54.63
3.2y sched 1 $275,081 55.17
3.2y sched 1 $285,900 56.68
3.2y sched 2 $352,313 58.74
3.3y sched 2 $603,248 67.81
3.3y sched 1 $311,636 62.65
3.3y sched 1 $345,958 67.91
3.3y sched 2 $405,066 67.59
3.3y sched 2 $613,271 68.28
3.3y sched 1 $337,150 67.97
3.4y sched 1 $349,108 69.75
3.4y sched 1 $344,494 69.12
3.4y sched 1 $542,494 71.25
3.4y sched 2 $741,077 73.81
3.4y sched 2 $2,771,276 71.69
3.4y sched 1 $323,215 65.29
3.5y sched 1 $369,979 74.00
3.5y sched 2 $10,345,262 74.07
3.5y sched 1 $855,000 74.74
3.5y sched 1 $267,272 52.24
3.5y sched 1 $264,471 53.80
3.6y sched 1 $245,115 47.20
3.6y sell 1 $238,603 47.89
3.6y sell 4 $2,760,093 48.11
3.7y sell 1 $533,378 52.55
3.8y sell 1 $555,319 54.13
3.8y sell 1 $264,600 56.77
3.8y sell 2 $1,149,758 52.60
3.9y sell 1 $589,734 58.05
3.9y sell 1 $305,188 59.88
3.9y sell 1 $310,371 62.39
3.9y sell 3 $1,536,781 62.78
3.9y sell 1 $610,859 61.62
4.0y sell 1 $570,678 57.41
4.0y sell 1 $280,827 55.65
4.0y sell 1 $278,083 54.12
4.0y sell 2 $1,243,250 57.06
4.0y sell 1 $5,160,175 58.62
4.0y sell 1 $1,144,642 60.12
4.0y sell 1 $564,373 57.28
4.1y sell 1 $279,553 52.70
4.1y sell 1 $289,620 57.45
4.1y sell 2 $1,217,699 58.30
4.1y sell 4 $4,082,010 61.41
4.1y sell 2 $394,594 30.16
4.1y sell 1 $120,000 29.09
4.2y sell 1 $301,700 29.35
4.2y sell 1 $69,857 30.55
4.2y sell 1 $1,123,039 31.45
4.2y sell 1 $1,380,407 31.61
4.3y sell 1 $122,080 31.14
4.3y sell 1 $12,032 30.89
4.3y sell 2 $2,771,131 31.94
4.3y sell 1 $240,000 30.89
4.5y sched 1 $61,681,197 28.27
4.6y sell 1 $175,389 36.64
4.6y sell 1 $197,037 38.45
4.8y buy 1 $11,250,000 37.45
4.8y sell 1 $237,240 46.00
4.9y sell 1 $261,561 50.41
5.0y sell 1 $550,000 57.61
5.0y sell 1 $571,825 59.03
5.0y sell 1 $585,235 55.62
5.0y sell 1 $1,385,786 60.94
5.1y sell 2 $1,021,508 67.95
5.2y sell 1 $719,860 75.46
5.3y sell 1 $247,369 49.92
5.3y sell 1 $616,023 52.01
5.3y sell 1 $1,326,113 54.70
5.3y sell 1 $1,326,113 57.33
5.4y sell 1 $572,854 48.43
5.4y sell 1 $5,318,785 51.02
5.6y buy 1 $18,156,250 26.48
5.7y buy 1 $9,200 23.50
5.7y buy 1 $1,172,436 22.75
5.7y buy 1 $1,042,965 21.52
5.7y buy 1 $162,288 22.79
5.7y sell 1 $192,270 23.76
5.7y sell 1 $504,049 23.28
5.7y buy 1 $13,665,836 23.28

Next report 2026-11-05 (Thursday, after close, in 2 days) · EPS estimate -0.30. It has finished the next session higher 47% of the time, average move 3.9%.

Day-after move, last 12 reports, oldest left.

ReportedEst.Actual SurpriseGapDay 1Day 5
2026-08-06 beat -0.38 -0.31 +18.4% -0.5% +2.1% +3.3%
2026-05-07 beat -0.30 0.68 +324.0% +4.6% +2.0% -7.2%
2026-02-19 beat -0.46 -0.46 +0.7% +3.9% -0.1% -4.0%
2025-11-06 miss -0.54 -0.67 -24.6% +4.1% +4.8% -1.5%
2025-08-04 beat -1.79 -1.73 +3.3% +1.3% +1.3% +8.6%
2025-05-08 miss -1.03 -1.12 -8.6% -1.1% +4.6% +1.1%
2025-02-20 miss -1.04 -1.08 -3.7% +4.3% +2.0% +3.7%
2024-11-12 beat -1.18 -1.10 +6.6% +0.0% -0.7% -17.1%
2024-08-08 beat -1.03 1.22 +217.9% +10.0% +4.4% +5.5%
2024-05-08 miss -1.22 -1.34 -10.0% -3.0% -4.5% +1.6%
2024-02-15 miss -1.19 -1.26 -5.8% -0.2% -1.8% -1.2%
2023-11-02 beat -0.34 0.38 +210.6% +10.0% +7.4% -4.7%
2023-08-03 miss -0.97 -1.03 -5.7% +5.4% -7.3% -6.6%
2023-05-04 miss -0.84 -0.89 -5.7% -0.4% +12.0% +3.8%
2023-02-23 beat -0.47 0.12 +125.8% +5.9% +7.1% +6.1%
2022-11-03 miss -0.62 -0.97 -56.7% -6.0% -5.4% -1.4%
2022-08-08 miss -0.53 -0.88 -66.8% +0.5% -8.3% -2.7%
2022-05-05 miss -0.64 -0.78 -22.3% -5.9% +2.7% -9.4%
2022-02-17 miss -0.44 -0.71 -62.8% -4.3% -4.0% -1.3%
2021-11-04 miss 2.24 2.13 -4.7% -2.1% +4.4% +1.3%
2021-08-05 miss 1.17 0.58 -50.2% -0.3% +2.6% +4.5%
2021-05-11 miss -0.49 -0.91 -85.7% -0.1% -4.9% +4.4%
2021-02-11 miss -0.74 -0.77 -3.4% +0.6% -0.2% +47.8%
2020-11-04 miss -0.65 -0.77 -19.2% +0.7% -1.5% -11.3%
2020-08-06 miss -0.59 -0.66 -11.2% -2.2% -1.5% -4.6%
2020-05-06 miss -0.56 -0.59 -5.4% -18.7% -6.0% -6.8%
2020-02-12 beat -0.55 -0.54 +1.8% +3.6% -4.4% -12.1%
2019-11-05 miss -0.46 -0.49 -5.4% -4.8% -4.2% +8.7%
2019-08-06 beat -0.58 -0.40 +31.0% -4.3% -2.4% -11.6%
2019-05-07 beat -0.59 -0.52 +11.0% +1.7% +4.8% -5.8%
2019-02-14 beat -0.89 -0.60 +32.0% +1.7% +3.1% +5.8%
2018-11-06 beat -0.82 -0.70 +14.9% +4.8% +1.6% -13.8%
2018-08-07 beat -1.24 -1.00 +20.0% -4.6% -0.9% -0.5%
2018-05-08 beat -1.34 -1.26 +6.3% -10.5% -4.8% +15.3%
2018-02-14 beat -1.48 -1.24 +16.1% +6.6% +3.7% +11.8%
2017-11-07 beat -1.46 -1.37 +6.1% -6.5% -7.8% -9.6%
2017-08-08 beat -0.81 -0.46 +43.0% +4.2% -4.4% -6.5%
2017-05-09 beat -1.36 -0.99 +27.1% +1.3% +7.3% +6.8%
2017-02-14 miss -1.21 -1.41 -16.5% -5.9% +1.6% +4.5%
2016-11-01 miss -1.18 -1.26 -6.8% -1.6% -5.8% +17.0%
2016-08-02 miss -0.91 -1.18 -29.1% -1.1% +4.8% -1.1%
2016-05-03 miss -0.77 -0.81 -5.7% -2.0% -7.1% -4.9%
2016-02-18 beat -0.81 -0.76 +6.7% -6.4% +8.9% +9.0%
2015-11-02 miss -0.65 -0.73 -12.0% -1.7% +3.8% +7.0%
2015-08-04 miss -0.57 -0.59 -4.3% -2.9% -2.1% -8.3%
2015-05-05 beat -0.62 -0.55 +11.2% +1.8% -1.1% -0.5%
2015-03-05 beat -0.65 -0.48 +26.1% +5.7% -1.7% +7.9%
2014-11-03 beat -0.62 -0.48 +22.7% +0.0% -7.1% +7.0%
2014-08-04 beat -0.13 0.06 +145.6% -0.6% +3.1% +11.4%
2014-05-05 beat 0.76 0.78 +2.2% +0.5% -0.2% -2.9%
2014-03-06 miss -0.42 -0.52 -22.8% -0.2% +0.3% +3.5%
2013-11-12 beat -0.66 -0.55 +17.0% -0.7% +6.0% +2.5%
2013-08-12 miss -0.54 -0.64 -18.5% +0.7% -1.6% +6.1%
Model view — historical tendencies for the days ahead, not a forecast
Next 1 day
+0.5%
Next 1 week
-0.7%
Next 1 month
+2.0%
Seasonality
Mildly negative window
Next 30 days (to Dec 3): -0.9% median, 46% of the last 13 years finished up.
20-year seasonality chart →
Mean reversion
Oversold — RSI(2) at 14
RSI(2) under 15 is oversold (this name has historically bounced); over 85 is overbought. Its dip-buy edge in history is -0.13%/day.
Mean-reversion stats →
1-month breakdown — Market · β 0.94 +2.2% · Seasonal tilt -0.2%
$5M/day volume 48% volatility -21% 1-year
52-week range · 14% of the way up · -30% from the high
$7.73$11.80

Not investment advice.