Prothena Corporation plc

Historical 13F Holders

Symbol
PRTA
CUSIP
G72800108
All holders as of
Q2 2026
Type
Equity
Class
SHS
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Each filer's latest filing for G72800108 since 12/18/2024, largest first.

Filer % of Class Filed
FMR LLC 13G/A
13.8% 8/6/2026
Event 6/30/2026
Scully William P 13G/A 10.3% 5/11/2026
Event 5/7/2026
Fennell Todd W. 13G/A 10.2% 8/19/2026
Event 8/18/2026
Rubric Capital Management LP 13G/A
9.3% 5/15/2026
Event 3/31/2026
BlackRock, Inc. 13G/A 6.9% 7/29/2026
Event 6/30/2026
Under 5%, checked the "5 percent or less" box, or amended by a later filing (5)
ADAR1 Capital Management, LLC 13G/A
2.7% 11/14/2025
Event 9/30/2025
Wellington Management Group LLP 13G/A
0.2% 6/5/2025
Event 5/30/2025
Price T Rowe Associates Inc /MD/ 13G/A 0.1% 8/14/2025
Event 6/30/2025
EcoR1 Capital, LLC 13D/A
0% 5/29/2025
Event 5/27/2025
Logos Global Management LP 13G/A
0% 8/14/2025
Event 6/30/2025

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 4 10.7 k $90.1 k
2026 Q2 197 47.3 M $466 M
2026 Q1 195 47.3 M $460 M
2025 Q4 200 47.3 M $452 M
2025 Q3 202 43.3 M $423 M
2025 Q2 205 42.3 M $257 M
2025 Q1 173 52.3 M $647 M
2024 Q4 187 53.8 M $746 M
2024 Q3 176 51.4 M $862 M
2024 Q2 175 52.2 M $1.08 B
2024 Q1 182 55.3 M $1.37 B
2023 Q4 218 55.0 M $2.00 B
2023 Q3 204 53.2 M $2.57 B
2023 Q2 218 52.0 M $3.54 B
2023 Q1 201 51.9 M $2.51 B
2022 Q4 215 51.5 M $3.10 B
2022 Q3 210 44.7 M $2.71 B
2022 Q2 174 44.6 M $1.21 B
2022 Q1 189 44.2 M $1.64 B
2021 Q4 213 43.1 M $2.13 B
2021 Q3 208 40.9 M $2.92 B
2021 Q2 169 40.6 M $2.09 B
2021 Q1 165 40.0 M $1.00 B
2020 Q4 155 36.6 M $439 M
2020 Q3 151 36.2 M $362 M
2020 Q2 150 37.9 M $396 M
2020 Q1 142 37.4 M $400 M
2019 Q4 155 37.6 M $595 M
2019 Q3 138 37.7 M $295 M
2019 Q2 152 39.0 M $412 M
2019 Q1 151 39.6 M $480 M
2018 Q4 138 40.7 M $419 M
2018 Q3 158 41.6 M $545 M
2018 Q2 146 41.9 M $611 M
2018 Q1 170 42.5 M $1.56 B
2017 Q4 178 43.3 M $1.63 B
2017 Q3 169 43.1 M $2.79 B
2017 Q2 157 42.5 M $2.30 B
2017 Q1 162 41.7 M $2.32 B
2016 Q4 158 38.0 M $1.87 B
2016 Q3 160 36.2 M $2.17 B
2016 Q2 150 34.7 M $1.21 B
2016 Q1 156 35.3 M $1.45 B
2015 Q4 175 30.4 M $2.07 B
2015 Q3 157 30.1 M $1.37 B
2015 Q2 148 29.5 M $1.55 B
2015 Q1 130 25.4 M $968 M
2014 Q4 136 25.0 M $521 M
2014 Q3 136 21.5 M $476 M
2014 Q2 145 22.6 M $510 M
2014 Q1 129 21.4 M $821 M