PROTHENA CORP PUBLIC LTD CO - Ordinary Shares, par value $0.01 per share (PRTA)

Historical Holders from Q1 2014 to Q3 2025

Symbol
PRTA on Nasdaq
CUSIP
G72800108
Type / Class
Equity / Ordinary Shares, par value $0.01 per share
Shares outstanding
54.4M
All holders as of September 30, 2025
Q3 2025
Total 13F shares, excl. options
42.6M
Holdings value
$416M
% of all portfolios
0.002%
Grand Portfolio weight change
+0%
Number of holders
183
Number of buys
86
Number of sells
-94
Average Value change %
0%
Average buys %
+0%
Average sells %
-0.001%
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of PROTHENA CORP PUBLIC LTD CO - Ordinary Shares, par value $0.01 per share (PRTA)

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
SCULLY WILLIAM P 9.8% -1% $51.6M -$683K 5.28M -1.31% SCULLY WILLIAM P Sep 30, 2025
Fennell Todd W. 8.4% +3.75% $43.9M $1.42M 4.5M +3.33% Fennell Todd W. Sep 30, 2025
BlackRock, Inc. 5.7% $30.2M 3.09M BlackRock, Inc. Sep 30, 2025
ADAR1 Capital Management, LLC 2.7% -60% $14.3M -$18.6M 1.47M -56.5% ADAR1 Capital Management, LLC Sep 30, 2025
WELLINGTON MANAGEMENT GROUP LLP 0.2% -93% $821K -$38.1M 108K -97.9% Wellington Management Group LLP May 30, 2025
PRICE T ROWE ASSOCIATES INC /MD/ 0.1% $585K 71K T. Rowe Price Associates, Inc. Jun 30, 2025

Institutional Holders of PROTHENA CORP PUBLIC LTD CO - Ordinary Shares, par value $0.01 per share (PRTA)

Period Reported Shares, Excl. Options Value, Excl. Options Change Price Investors
2025 Q3 42.6M $416M +$14M $9.76 183
2025 Q2 41.8M $254M -$154M $6.07 188
2025 Q1 52.3M $647M -$15.4M $12.38 158
2024 Q4 53.5M $741M +$20.8M $13.85 168
2024 Q3 50.8M $850M -$25M $16.73 160
2024 Q2 50.8M $1.05B -$58.2M $20.64 159
2024 Q1 53.4M $1.32B -$28.1M $24.77 163
2023 Q4 52.7K $1.92M -$3.75M $36.34 2
2023 Q3 52.9M $2.55B +$22.4M $48.25 181
2023 Q2 51.6M $3.52B +$9.99M $68.28 191
2023 Q1 51.8M $2.51B +$113M $48.47 188
2022 Q4 49.4M $2.98B +$290M $60.25 199
2022 Q3 44.3M $2.69B -$39.1M $60.63 168
2022 Q2 44.4M $1.2B +$8.22M $27.15 144
2022 Q1 41.4M $1.51B +$37.4M $36.57 153
2021 Q4 40.2M $1.99B +$71.8M $49.40 175
2021 Q3 40.9M $2.91B +$42.8M $71.23 177
2021 Q2 40.4M $2.08B +$56.2M $51.41 144
2021 Q1 40M $1B +$174M $25.12 133
2020 Q4 31M $373M -$10.9M $12.01 117
2020 Q3 36.2M $362M -$14.5M $9.99 120
2020 Q2 37.6M $394M +$5.32M $10.46 117
2020 Q1 37.2M $398M +$368K $10.70 106
2019 Q4 36.8M $583M -$7.39M $15.83 113
2019 Q3 36.5M $287M +$56.8M $7.84 100
2019 Q2 29.9M $316M +$31.1M $10.57 111
2019 Q1 35.6M $432M -$11.2M $12.13 106
2018 Q4 40.1M $413M -$11.2M $10.30 92
2018 Q3 36.4M $477M -$27M $13.08 98
2018 Q2 38.2M $556M -$68.4M $14.58 94
2018 Q1 42.2M $1.55B -$42.6M $36.71 124
2017 Q4 43.3M $1.62B -$23.4M $37.49 134
2017 Q3 43M $2.79B +$63.2M $64.77 133
2017 Q2 42.5M $2.3B +$51.9M $54.12 129
2017 Q1 41.4M $2.31B +$350M $55.79 131
2016 Q4 37.9M $1.86B +$78.3M $49.19 127
2016 Q3 35.8M $2.15B +$92.2M $59.97 121
2016 Q2 34.7M $1.21B -$16.8M $34.96 118
2016 Q1 34.9M $1.44B +$168M $41.16 121
2015 Q4 29.9M $2.04B +$281K $68.11 142
2015 Q3 30.1M $1.36B +$29.7M $45.34 128
2015 Q2 28.9M $1.52B +$212M $52.67 118
2015 Q1 25.4M $967M +$43.3M $38.14 105
2014 Q4 24.7M $515M -$1.94M $20.76 104
2014 Q3 21.5M $476M -$16.9M $22.16 105
2014 Q2 22.1M $498M +$4.32M $22.55 108
2014 Q1 20.7M $792M +$190M $38.31 103