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, Q4 2021
Institutional positions in Prothena Corp Public Ltd Co as of Dec 31, 2021. 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
- 196
- +5 vs. Q3 2021
- Shares held
- 42.8M
- +1.95M (+4.8%) vs. Q3 2021
- Total value
- $2.12B
- −$796.5M (−27.3%) vs. Q3 2021
- New holders
- 41
- 72 more added
- Sold out
- 36
- 37 more reduced
1 institution that held it in Q3 2021 haven't filed for Q4 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2021: 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, Q4 2021
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q3 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| ETF Managers Group, LLC | 0 | $0 | 0.00% | −43,230−100.0% | Sold out |
| Syntal Capital Partners, LLC | 0 | $0 | 0.00% | −33,615−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −27,280−100.0% | Sold out |
| M&G Investment Management Ltd | 0 | $0 | 0.00% | −20,004−100.0% | Sold out |
| Alpha DNA Investment Management LLC | 0 | $0 | 0.00% | −19,389−100.0% | Sold out |
| Bellwether Advisors, LLC | 0 | $0 | 0.00% | −17,846−100.0% | Sold out |
| Los Angeles Capital Management LLC | 0 | $0 | 0.00% | −17,645−100.0% | Sold out |
| Seven Eight Capital, LP | 0 | $0 | 0.00% | −14,800−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −10,469−100.0% | Sold out |
| AE Wealth Management LLC | 0 | $0 | 0.00% | −8,670−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −8,400−100.0% | Sold out |
| Connor, Clark & Lunn Investment Management Ltd. | 0 | $0 | 0.00% | −6,690−100.0% | Sold out |
| Old Well Partners, LLC | 0 | $0 | 0.00% | −4,824−100.0% | Sold out |
| PDT Partners, LLC | 0 | $0 | 0.00% | −4,420−100.0% | Sold out |
| Hunter Perkins Capital Management, LLC | 0 | $0 | 0.00% | −4,114−100.0% | Sold out |
| Brighton Jones LLC | 0 | $0 | 0.00% | −4,000−100.0% | Sold out |
| Xcel Wealth Management, LLC | 0 | $0 | 0.00% | −4,000−100.0% | Sold out |
| Wetherby Asset Management Inc | 0 | $0 | 0.00% | −3,906−100.0% | Sold out |
| Meristem Family Wealth, LLC | 0 | $0 | 0.00% | −3,290−100.0% | Sold out |
| Summit Trail Advisors, LLC | 0 | $0 | 0.00% | −3,000−100.0% | Sold out |
| O'Shaughnessy Asset Management, LLC | 0 | $0 | 0.00% | −2,048−100.0% | Sold out |
| Meeder Asset Management Inc | 0 | $0 | 0.00% | −1,813−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −1,329−100.0% | Sold out |
| Penserra Capital Management LLC | 0 | $0 | 0.00% | −1,030−100.0% | Sold out |
| Point72 Hong Kong Ltd | 0 | $0 | 0.00% | −324−100.0% | Sold out |
| Tarbox Family Office, Inc. | 0 | $0 | 0.00% | −295−100.0% | Sold out |
| Macroview Investment Management LLC | 0 | $0 | 0.00% | −131−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −62−100.0% | Sold out |
| Steward Partners Investment Advisory, LLC | 0 | $0 | 0.00% | −25−100.0% | Sold out |
| Hudock, Inc. | 0 | $0 | 0.00% | −28−100.0% | Sold out |
| TD Private Client Wealth LLC | 0 | $0 | 0.00% | −12−100.0% | Sold out |
| Gerber Kawasaki Wealth & Investment Management | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Marshall Wace North America L.P. | – | – | – | – | Not filed |