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 5 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 |
|---|---|---|---|---|---|
| Ameriprise Financial Inc | 14,420 | $712.0K | 0.00% | +5,297+58.1% | Added |
| Corton Capital Inc. | 14,352 | $709.0K | 0.31% | +14,352 | New |
| Boulder Hill Capital Management LP | 14,300 | $706.0K | 0.68% | +14,300 | New |
| Harvest Investment Services, LLC | 14,141 | $698.0K | 0.29% | +6,913+95.6% | Added |
| Mariner, LLC | 13,986 | $691.0K | 0.00% | +13,986 | New |
| Voya Investment Management LLC | 13,629 | $673.0K | 0.00% | −138−1.0% | Reduced |
| Gsa Capital Partners LLP | 13,259 | $655.0K | 0.08% | +9,648+267.2% | Added |
| MetLife Investment Management | 12,610 | $622.9K | 0.01% | 00.0% | Unchanged |
| DekaBank Deutsche Girozentrale | 12,700 | $582.0K | 0.00% | +350+2.8% | Added |
| Putnam Investments LLC | 11,529 | $570.0K | 0.00% | +11,529 | New |
| Advisory Research Inc | 10,975 | $542.0K | 0.04% | −8,709−44.2% | Reduced |
| Schonfeld Strategic Advisors LLC | 10,387 | $513.0K | 0.00% | +6,622+175.9% | Added |
| AQR Capital Management LLC | 9,917 | $490.0K | 0.00% | −3,429−25.7% | Reduced |
| Franklin Resources Inc | 9,750 | $482.0K | 0.00% | +115+1.2% | Added |
| Metropolitan Life Insurance Co | 9,280 | $458.4K | 0.01% | 00.0% | Unchanged |
| Jane Street Group, LLC | 9,168 | $453.0K | 0.00% | −3,781−29.2% | Reduced |
| Ergoteles LLC | 8,800 | $435.0K | 0.02% | +8,800 | New |
| Arizona State Retirement System | 8,487 | $419.0K | 0.00% | +64+0.8% | Added |
| BNP Paribas Arbitrage, SA | 8,325 | $411.3K | 0.00% | +1,571+23.3% | Added |
| Public Employees Retirement Association of Colorado | 8,273 | $409.0K | 0.00% | −2,711−24.7% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 8,226 | $406.0K | 0.00% | +3,415+71.0% | Added |
| Victory Capital Management Inc | 8,137 | $402.0K | 0.00% | +4,224+107.9% | Added |
| Acadian Asset Management LLC | 7,961 | $393.0K | 0.00% | +6,531+456.7% | Added |
| Navellier & Associates Inc | 7,553 | $373.0K | 0.05% | +373+5.2% | Added |
| Virginia Retirement Systems Et Al | 7,500 | $371.0K | 0.00% | −3,400−31.2% | Reduced |
| Squarepoint Ops LLC | 6,606 | $326.0K | 0.00% | +6,606 | New |
| NinePointTwo Capital | 6,172 | $304.0K | 0.10% | +6,172 | New |
| King Wealth | 6,000 | $296.0K | 0.05% | 00.0% | Unchanged |
| Teacher Retirement System of Texas | 6,000 | $296.0K | 0.00% | +1,191+24.8% | Added |
| Amalgamated Bank | 5,911 | $292.0K | 0.00% | +76+1.3% | Added |
| Dynamic Technology Lab Private Ltd | 5,870 | $290.0K | 0.03% | +5,870 | New |
| Trexquant Investment LP | 5,866 | $290.0K | 0.02% | +5,866 | New |
| Delphia (USA) Inc. | 5,597 | $276.0K | 0.29% | +5,597 | New |
| Janus Henderson Group PLC | 5,495 | $272.0K | 0.00% | +5,495 | New |
| Quantbot Technologies LP | 5,338 | $263.0K | 0.02% | +4,738+789.7% | Added |
| State of Wyoming | 5,237 | $259.0K | 0.12% | +502+10.6% | Added |
| Raymond James & Associates | 4,700 | $232.0K | 0.00% | 00.0% | Unchanged |
| Oppenheimer & Co Inc | 4,549 | $225.0K | 0.00% | −214−4.5% | Reduced |
| Blueshift Asset Management, LLC | 4,478 | $221.0K | 0.02% | +4,478 | New |
| Group One Trading, L.P. | 4,188 | $207.0K | 0.00% | +2,251+116.2% | Added |
| Virtus ETF Advisers LLC | 3,901 | $193.0K | 0.07% | −557−12.5% | Reduced |
| Tower Research Capital LLC (TRC) | 3,396 | $168.0K | 0.00% | −1,922−36.1% | Reduced |
| Fieldpoint Private Securities, LLC | 3,000 | $148.0K | 0.03% | +1,000+50.0% | Added |
| Ameritas Investment Partners, Inc. | 2,702 | $133.0K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 3,479 | $119.0K | 0.00% | +2,449+237.8% | Added |
| Focused Wealth Management, Inc | 2,392 | $118.0K | 0.02% | 00.0% | Unchanged |
| Brewin Dolphin Wealth Management Ltd | 2,009 | $99.0K | 0.01% | 00.0% | Unchanged |
| Macquarie Group Ltd | 1,548 | $76.0K | 0.00% | 00.0% | Unchanged |
| Captrust Financial Advisors | 1,431 | $71.0K | 0.00% | −572−28.6% | Reduced |
| US Bancorp | 1,290 | $64.0K | 0.00% | 00.0% | Unchanged |
| HighMark Wealth Management LLC | 1,075 | $53.0K | 0.03% | −721−40.1% | Reduced |
| Lazard Asset Management LLC | 1,076 | $53.0K | 0.00% | +158+17.2% | Added |
| Spire Wealth Management | 1,070 | $53.0K | 0.00% | +967+938.8% | Added |
| Parallel Advisors, LLC | 995 | $49.0K | 0.00% | 00.0% | Unchanged |
| Signet Financial Management, LLC | 850 | $42.0K | 0.01% | +850 | New |
| Denali Advisors LLC | 800 | $40.0K | 0.01% | +800 | New |
| Aquatic Capital Management LLC | 600 | $30.0K | 0.06% | +600 | New |
| The PNC Financial Services Group, Inc. | 416 | $21.0K | 0.00% | 00.0% | Unchanged |
| Signaturefd, LLC | 420 | $21.0K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 370 | $19.0K | 0.00% | −1,068−74.3% | Reduced |
| Federation des caisses Desjardins du Quebec | 376 | $18.6K | 0.00% | 00.0% | Unchanged |
| Asset Dedication, LLC | 184 | $9.00K | 0.00% | 00.0% | Unchanged |
| Kelly Financial Services LLC | 182 | $8.99K | 0.00% | 00.0% | Unchanged |
| Daiwa Securities Group Inc. | 154 | $8.00K | 0.00% | 00.0% | Unchanged |
| Sittner & Nelson, LLC | 155 | $8.00K | 0.00% | 00.0% | Unchanged |
| TCI Wealth Advisors, Inc. | 160 | $8.00K | 0.00% | +43+36.8% | Added |
| Albion Financial Group | 125 | $6.00K | 0.00% | 00.0% | Unchanged |
| Hall Laurie J Trustee | 110 | $5.00K | 0.00% | 00.0% | Unchanged |
| Harbor Investment Advisory, LLC | 100 | $5.00K | 0.00% | 00.0% | Unchanged |
| Rockbridge Investment Management, LCC | 100 | $5.00K | 0.00% | 00.0% | Unchanged |
| Gould Capital, LLC | 100 | $5.00K | 0.00% | +100 | New |
| Rockefeller Capital Management L.P. | 85 | $4.00K | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 73 | $4.00K | 0.00% | 00.0% | Unchanged |
| Northwestern Mutual Wealth Management Co | 73 | $4.00K | 0.00% | +73 | New |
| Bessemer Group Inc | 63 | $3.00K | 0.00% | 00.0% | Unchanged |
| C M Bidwell & Associates Ltd | 50 | $2.00K | 0.00% | +50 | New |
| CWM, LLC | 32 | $2.00K | 0.00% | +32 | New |
| Centerpoint Advisors, LLC | 36 | $2.00K | 0.00% | +36 | New |
| Brewin Dolphin Ltd | 16 | $1.00K | 0.00% | −513−97.0% | Reduced |
| Allworth Financial LP | 23 | $1.00K | 0.00% | 00.0% | Unchanged |
| Geneos Wealth Management Inc. | 26 | $1.00K | 0.00% | 00.0% | Unchanged |
| Blue Bell Private Wealth Management, LLC | 12 | $1.00K | 0.00% | +12 | New |
| CoreCap Advisors, LLC | 11 | $1.00K | 0.00% | +11 | New |
| American Portfolios Advisors | 2 | $99 | 0.00% | 00.0% | Unchanged |
| Harbour Investments, Inc. | 4 | $0 | 0.00% | 00.0% | Unchanged |
| Whittier Trust Co of Nevada Inc | 3 | $0 | 0.00% | 00.0% | Unchanged |
| TD Capital Management LLC | 1 | $0 | 0.00% | 00.0% | Unchanged |
| Lowe Wealth Advisors, LLC | 1 | $0 | 0.00% | 00.0% | Unchanged |
| NEXT Financial Group, Inc | 3 | $0 | 0.00% | 00.0% | Unchanged |
| Patriot Financial Group Insurance Agency, LLC | 4 | $0 | 0.00% | 00.0% | Unchanged |
| Investors Research Corp | 4 | $0 | 0.00% | 00.0% | Unchanged |
| Coastal Capital Group, Inc. | 2 | $0 | 0.00% | 00.0% | Unchanged |
| TSFG, LLC | 2 | $0 | 0.00% | 00.0% | Unchanged |
| Covington Capital Management | 7 | $0 | 0.00% | +7 | New |
| Reilly Financial Advisors, LLC | 1 | $0 | 0.00% | +1 | New |
| Dark Forest Capital Management LP | 2 | $0 | 0.00% | +2 | New |
| Atika Capital Management LLC | 0 | $0 | 0.00% | −224,600−100.0% | Sold out |
| Adage Capital Partners GP, L.L.C. | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| EAM Investors, LLC | 0 | $0 | 0.00% | −64,650−100.0% | Sold out |
| EAM Global Investors LLC | 0 | $0 | 0.00% | −49,720−100.0% | Sold out |