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, Q3 2025
Institutional positions in Prothena Corp Public Ltd Co as of Sep 30, 2025. 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
- −1 vs. Q2 2025
- Shares held
- 42.6M
- +896.5K (+2.1%) vs. Q2 2025
- Total value
- $415.8M
- +$162.6M (+64.2%) vs. Q2 2025
- New holders
- 31
- 58 more added
- Sold out
- 32
- 61 more reduced
1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: 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 2025
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Prosight Management, LP | 20,000 | $195.2K | 0.05% | −247,800−92.5% | Reduced |
| Foundation Wealth Management, LLC | 19,471 | $190.0K | 0.12% | 00.0% | Unchanged |
| Intech Investment Management LLC | 19,388 | $189.2K | 0.00% | +1,014+5.5% | Added |
| MetLife Investment Management | 19,362 | $189.0K | 0.00% | −6,040−23.8% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 18,834 | $183.8K | 0.00% | −2,384−11.2% | Reduced |
| Ballentine Partners, LLC | 18,310 | $178.7K | 0.00% | +18,310 | New |
| The PNC Financial Services Group, Inc. | 18,137 | $177.0K | 0.00% | +109+0.6% | Added |
| Chicago Partners Investment Group LLC | 14,841 | $156.4K | 0.00% | +82+0.6% | Added |
| XTX Topco Ltd | 15,808 | $154.3K | 0.01% | +15,808 | New |
| State Board of Administration of Florida Retirement System | 15,386 | $150.2K | 0.00% | 00.0% | Unchanged |
| Corton Capital Inc. | 14,208 | $138.7K | 0.34% | +244+1.7% | Added |
| Manufacturers Life Insurance Company, The | 13,867 | $135.3K | 0.00% | −1,273−8.4% | Reduced |
| DekaBank Deutsche Girozentrale | 14,000 | $134.0K | 0.00% | 00.0% | Unchanged |
| Jones Financial Companies LLLP | 14,000 | $131.7K | 0.00% | 00.0% | Unchanged |
| Great Lakes Advisors, LLC | 13,284 | $129.7K | 0.00% | +13,284 | New |
| Thrivent Financial for Lutherans | 12,980 | $127.0K | 0.00% | −25,646−66.4% | Reduced |
| Cary Street Partners Financial LLC | 12,500 | $122.0K | 0.00% | 00.0% | Unchanged |
| Police & Firemen's Retirement System of New Jersey | 12,464 | $121.6K | 0.00% | +2,351+23.2% | Added |
| Y-Intercept (Hong Kong) Ltd | 12,171 | $118.8K | 0.00% | +12,171 | New |
| Jain Global LLC | 11,780 | $115.0K | 0.00% | −6,482−35.5% | Reduced |
| Oppenheimer & Co Inc | 11,660 | $113.8K | 0.00% | −6,935−37.3% | Reduced |
| Inscription Capital, LLC | 10,480 | $102.3K | 0.01% | +10,480 | New |
| Royal Bank of Canada | 10,331 | $101.0K | 0.00% | −95,608−90.2% | Reduced |
| CWM, LLC | 10,246 | $100.0K | 0.00% | +8,880+650.1% | Added |
| China Universal Asset Management Co., Ltd. | 9,436 | $92.1K | 0.01% | −1,375−12.7% | Reduced |
| New York State Common Retirement Fund | 8,979 | $87.6K | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 6,949 | $67.8K | 0.00% | −25,309−78.5% | Reduced |
| Skopos Labs, Inc. | 11,113 | $67.6K | 0.01% | 00.0% | Unchanged |
| Public Employees Retirement Association of Colorado | 6,552 | $64.0K | 0.00% | 00.0% | Unchanged |
| Point72 (DIFC) Ltd | 5,847 | $57.1K | 0.00% | −18,099−75.6% | Reduced |
| SRS Capital Advisors, Inc. | 5,384 | $52.5K | 0.00% | +5,384 | New |
| Brown Brothers Harriman & Co | 5,000 | $48.8K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 4,405 | $43.0K | 0.00% | +4,405 | New |
| Signaturefd, LLC | 3,670 | $35.8K | 0.00% | +313+9.3% | Added |
| Legal & General Group Plc | 3,599 | $35.1K | 0.00% | −5,724−61.4% | Reduced |
| Citigroup Inc | 3,592 | $35.1K | 0.00% | −45,711−92.7% | Reduced |
| Ameritas Investment Partners, Inc. | 3,428 | $33.5K | 0.00% | −940−21.5% | Reduced |
| Sterling Capital Management LLC | 2,547 | $24.9K | 0.00% | +1,588+165.6% | Added |
| Farther Finance Advisors, LLC | 2,434 | $23.8K | 0.00% | −23−0.9% | Reduced |
| California State Teachers Retirement System | 2,415 | $23.6K | 0.00% | −30,828−92.7% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 2,081 | $20.3K | 0.00% | +2+0.1% | Added |
| Versant Capital Management, Inc | 2,044 | $19.9K | 0.00% | 00.0% | Unchanged |
| HighMark Wealth Management LLC | 2,008 | $19.6K | 0.01% | −10−0.5% | Reduced |
| Flagship Wealth Advisors, LLC | 1,500 | $14.6K | 0.00% | 00.0% | Unchanged |
| Amalgamated Bank | 1,440 | $14.0K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 1,285 | $12.5K | 0.00% | −11,424−89.9% | Reduced |
| Quadrant Capital Group LLC | 1,260 | $12.3K | 0.00% | +1,260 | New |
| GF Fund Management Co. Ltd. | 1,155 | $11.3K | 0.00% | −222−16.1% | Reduced |
| Allworth Financial LP | 865 | $8.44K | 0.00% | +493+132.5% | Added |
| HM Payson & Co | 600 | $5.86K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 592 | $5.78K | 0.00% | +66+12.5% | Added |
| Point72 Europe (London) LLP | 531 | $5.18K | 0.00% | +531 | New |
| GAMMA Investing LLC | 386 | $3.77K | 0.00% | +189+95.9% | Added |
| Optiver Holding B.V. | 352 | $3.44K | 0.00% | +352 | New |
| Essential Partners LLC | 333 | $3.25K | 0.00% | +333 | New |
| US Bancorp | 314 | $3.06K | 0.00% | −8,717−96.5% | Reduced |
| Manchester Capital Management LLC | 250 | $2.44K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 243 | $2.30K | 0.00% | −4−1.6% | Reduced |
| CVA Family Office, LLC | 225 | $2.20K | 0.00% | +153+212.5% | Added |
| Daiwa Securities Group Inc. | 195 | $2.00K | 0.00% | 00.0% | Unchanged |
| Evelyn Partners Investment Management LLP | 199 | $1.94K | 0.00% | 00.0% | Unchanged |
| Asset Dedication, LLC | 184 | $1.80K | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 179 | $1.75K | 0.00% | −414−69.8% | Reduced |
| North Capital, Inc. | 159 | $1.55K | 0.00% | 00.0% | Unchanged |
| Sittner & Nelson, LLC | 155 | $1.51K | 0.00% | 00.0% | Unchanged |
| Johnson Financial Group, Inc. | 151 | $1.47K | 0.00% | +151 | New |
| Albion Financial Group | 125 | $1.22K | 0.00% | 00.0% | Unchanged |
| True Wealth Design, LLC | 103 | $1.01K | 0.00% | +103 | New |
| Harbor Investment Advisory, LLC | 100 | $976 | 0.00% | 00.0% | Unchanged |
| Gould Capital, LLC | 100 | $976 | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 90 | $879 | 0.00% | +90 | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 71 | $693 | 0.00% | −15,497−99.5% | Reduced |
| Walleye Capital LLC | 63 | $615 | 0.00% | −1,995−96.9% | Reduced |
| Northwestern Mutual Wealth Management Co | 50 | $488 | 0.00% | +50 | New |
| CIBC Private Wealth Group, LLC | 48 | $468 | 0.00% | −1−2.0% | Reduced |
| Ronald Blue Trust, Inc. | 33 | $322 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 29 | $283 | 0.00% | −933−97.0% | Reduced |
| CoreCap Advisors, LLC | 23 | $224 | 0.00% | 00.0% | Unchanged |
| Clearstead Advisors, LLC | 21 | $205 | 0.00% | +17+425.0% | Added |
| IFP Advisors, Inc | 15 | $146 | 0.00% | +15 | Added |
| Key Financial Inc | 12 | $119 | 0.00% | 00.0% | Unchanged |
| Lowe Wealth Advisors, LLC | 10 | $98 | 0.00% | 00.0% | Unchanged |
| Glen Eagle Advisors, LLC | 10 | $98 | 0.00% | +10 | New |
| Steward Partners Investment Advisory, LLC | 6 | $59 | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 6 | $59 | 0.00% | +6 | New |
| Harbour Investments, Inc. | 1 | $10 | 0.00% | 00.0% | Unchanged |
| Truvestments Capital LLC | 1 | $9 | 0.00% | −68−98.6% | Reduced |
| Granahan Investment Management Inc | 0 | $0 | 0.00% | −461,082−100.0% | Sold out |
| Nordea Investment Management AB | 0 | $0 | 0.00% | −311,605−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −307,341−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −210,555−100.0% | Sold out |
| UBS Asset Management Americas Inc | 0 | $0 | 0.00% | −139,284−100.0% | Sold out |
| Wellington Management Group LLP | 0 | $0 | 0.00% | −107,839−100.0% | Sold out |
| State of Wisconsin Investment Board | 0 | $0 | 0.00% | −103,996−100.0% | Sold out |
| Swiss National Bank | 0 | $0 | 0.00% | −56,500−100.0% | Sold out |
| PDT Partners, LLC | 0 | $0 | 0.00% | −41,281−100.0% | Sold out |
| Susquehanna Fundamental Investments, LLC | 0 | $0 | 0.00% | −37,591−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −32,866−100.0% | Sold out |
| Sherbrooke Park Advisers LLC | 0 | $0 | 0.00% | −27,221−100.0% | Sold out |
| Nebula Research & Development LLC | 0 | $0 | 0.00% | −22,857−100.0% | Sold out |