Prothena Corp Public Ltd Co
PRTA- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001559053
In the last 90 days, Prothena Corp Public Ltd Co insiders filed 4 open-market purchases and 2 sales; 187 institutions reported holding it in 13F filings for Q2 2026, worth $462.7M in total; no superinvestor holds it.
13F holders, Q3 2023
Institutional positions in Prothena Corp Public Ltd Co as of Sep 30, 2023. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 187
- −6 vs. Q2 2023
- Shares held
- 53.0M
- +1.07M (+2.1%) vs. Q2 2023
- Total value
- $2.56B
- −$984.1M (−27.8%) vs. Q2 2023
- New holders
- 25
- 73 more added
- Sold out
- 31
- 51 more reduced
3 institutions that held it in Q2 2023 haven't filed for Q3 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2023: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting PRTA on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 187 | $462.7M |
| Q1 2026 | 186 | $459.5M |
| Q4 2025 | 182 | $451.6M |
| Q3 2025 | 187 | $415.8M |
| Q2 2025 | 189 | $253.6M |
| Q1 2025 | 161 | $647.2M |
| Q4 2024 | 171 | $741.3M |
| Q3 2024 | 164 | $855.8M |
| Q2 2024 | 160 | $1.05B |
| Q1 2024 | 169 | $1.33B |
| Q4 2023 | 187 | $1.95B |
| Q3 2023 | 187 | $2.56B |
| Q2 2023 | 196 | $3.54B |
| Q1 2023 | 192 | $2.51B |
| Q4 2022 | 201 | $2.98B |
| Q3 2022 | 183 | $2.69B |
| Q2 2022 | 167 | $1.21B |
| Q1 2022 | 174 | $1.61B |
| Q4 2021 | 196 | $2.12B |
| Q3 2021 | 192 | $2.92B |
| Q2 2021 | 156 | $2.08B |
| Q1 2021 | 146 | $1.00B |
Institutions, Q3 2023
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q2 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Harvest Investment Services, LLC | 0 | $0 | 0.00% | −11,772−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −10,869−100.0% | Sold out |
| Parallax Volatility Advisers, L.P. | 0 | $0 | 0.00% | −6,425−100.0% | Sold out |
| Moran Wealth Management, LLC | 0 | $0 | 0.00% | −4,509−100.0% | Sold out |
| Delphia (USA) Inc. | 0 | $0 | 0.00% | −3,883−100.0% | Sold out |
| HighTower Advisors, LLC | 0 | $0 | 0.00% | −3,781−100.0% | Sold out |
| NinePointTwo Capital | 0 | $0 | 0.00% | −3,741−100.0% | Sold out |
| Glenmede Trust Co NA | 0 | $0 | 0.00% | −5,069−100.0% | Sold out |
| Wetherby Asset Management Inc | 0 | $0 | 0.00% | −3,570−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | 0 | $0 | 0.00% | −3,159−100.0% | Sold out |
| Penserra Capital Management LLC | 0 | $0 | 0.00% | −3,104−100.0% | Sold out |
| West Tower Group, LLC | 0 | $0 | 0.00% | −659−100.0% | Sold out |
| First Manhattan Co | 0 | $0 | 0.00% | −374−100.0% | Sold out |
| GWM Advisors LLC | 0 | $0 | 0.00% | −150−100.0% | Sold out |
| Harbor Capital Advisors, Inc. | 0 | $0 | 0.00% | −53−100.0% | Sold out |
| CVA Family Office, LLC | 0 | $0 | 0.00% | −14−100.0% | Sold out |
| Versant Capital Management, Inc | 0 | $0 | 0.00% | −6−100.0% | Sold out |
| Disciplined Investments, LLC | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| EA Series Trust | – | – | – | – | Not filed |
| Pictet Asset Management SA | – | – | – | – | Not filed |
| Coastal Capital Group, Inc. | – | – | – | – | Not filed |