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 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 |
|---|---|---|---|---|---|
| Truvestments Capital LLC | 1 | $9 | 0.00% | −68−98.6% | Reduced |
| Harbour Investments, Inc. | 1 | $10 | 0.00% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 6 | $59 | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 6 | $59 | 0.00% | +6 | New |
| Lowe Wealth Advisors, LLC | 10 | $98 | 0.00% | 00.0% | Unchanged |
| Glen Eagle Advisors, LLC | 10 | $98 | 0.00% | +10 | New |
| Key Financial Inc | 12 | $119 | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 15 | $146 | 0.00% | +15 | Added |
| Clearstead Advisors, LLC | 21 | $205 | 0.00% | +17+425.0% | Added |
| CoreCap Advisors, LLC | 23 | $224 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 29 | $283 | 0.00% | −933−97.0% | Reduced |
| Ronald Blue Trust, Inc. | 33 | $322 | 0.00% | 00.0% | Unchanged |
| CIBC Private Wealth Group, LLC | 48 | $468 | 0.00% | −1−2.0% | Reduced |
| Northwestern Mutual Wealth Management Co | 50 | $488 | 0.00% | +50 | New |
| Walleye Capital LLC | 63 | $615 | 0.00% | −1,995−96.9% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 71 | $693 | 0.00% | −15,497−99.5% | Reduced |
| EverSource Wealth Advisors, LLC | 90 | $879 | 0.00% | +90 | New |
| Harbor Investment Advisory, LLC | 100 | $976 | 0.00% | 00.0% | Unchanged |
| Gould Capital, LLC | 100 | $976 | 0.00% | 00.0% | Unchanged |
| True Wealth Design, LLC | 103 | $1.01K | 0.00% | +103 | New |
| Albion Financial Group | 125 | $1.22K | 0.00% | 00.0% | Unchanged |
| Johnson Financial Group, Inc. | 151 | $1.47K | 0.00% | +151 | New |
| Sittner & Nelson, LLC | 155 | $1.51K | 0.00% | 00.0% | Unchanged |
| North Capital, Inc. | 159 | $1.55K | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 179 | $1.75K | 0.00% | −414−69.8% | Reduced |
| Asset Dedication, LLC | 184 | $1.80K | 0.00% | 00.0% | Unchanged |
| Evelyn Partners Investment Management LLP | 199 | $1.94K | 0.00% | 00.0% | Unchanged |
| Daiwa Securities Group Inc. | 195 | $2.00K | 0.00% | 00.0% | Unchanged |
| CVA Family Office, LLC | 225 | $2.20K | 0.00% | +153+212.5% | Added |
| Advisor Group Holdings, Inc. | 243 | $2.30K | 0.00% | −4−1.6% | Reduced |
| Manchester Capital Management LLC | 250 | $2.44K | 0.00% | 00.0% | Unchanged |
| US Bancorp | 314 | $3.06K | 0.00% | −8,717−96.5% | Reduced |
| Essential Partners LLC | 333 | $3.25K | 0.00% | +333 | New |
| Optiver Holding B.V. | 352 | $3.44K | 0.00% | +352 | New |
| GAMMA Investing LLC | 386 | $3.77K | 0.00% | +189+95.9% | Added |
| Point72 Europe (London) LLP | 531 | $5.18K | 0.00% | +531 | New |
| Nisa Investment Advisors, LLC | 592 | $5.78K | 0.00% | +66+12.5% | Added |
| HM Payson & Co | 600 | $5.86K | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 865 | $8.44K | 0.00% | +493+132.5% | Added |
| GF Fund Management Co. Ltd. | 1,155 | $11.3K | 0.00% | −222−16.1% | Reduced |
| Quadrant Capital Group LLC | 1,260 | $12.3K | 0.00% | +1,260 | New |
| Tower Research Capital LLC (TRC) | 1,285 | $12.5K | 0.00% | −11,424−89.9% | Reduced |
| Amalgamated Bank | 1,440 | $14.0K | 0.00% | 00.0% | Unchanged |
| Flagship Wealth Advisors, LLC | 1,500 | $14.6K | 0.00% | 00.0% | Unchanged |
| HighMark Wealth Management LLC | 2,008 | $19.6K | 0.01% | −10−0.5% | Reduced |
| Versant Capital Management, Inc | 2,044 | $19.9K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global Investments Co., Ltd. | 2,081 | $20.3K | 0.00% | +2+0.1% | Added |
| California State Teachers Retirement System | 2,415 | $23.6K | 0.00% | −30,828−92.7% | Reduced |
| Farther Finance Advisors, LLC | 2,434 | $23.8K | 0.00% | −23−0.9% | Reduced |
| Sterling Capital Management LLC | 2,547 | $24.9K | 0.00% | +1,588+165.6% | Added |
| Ameritas Investment Partners, Inc. | 3,428 | $33.5K | 0.00% | −940−21.5% | Reduced |
| Citigroup Inc | 3,592 | $35.1K | 0.00% | −45,711−92.7% | Reduced |
| Legal & General Group Plc | 3,599 | $35.1K | 0.00% | −5,724−61.4% | Reduced |
| Signaturefd, LLC | 3,670 | $35.8K | 0.00% | +313+9.3% | Added |
| Rockefeller Capital Management L.P. | 4,405 | $43.0K | 0.00% | +4,405 | New |
| Brown Brothers Harriman & Co | 5,000 | $48.8K | 0.00% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 5,384 | $52.5K | 0.00% | +5,384 | New |
| Point72 (DIFC) Ltd | 5,847 | $57.1K | 0.00% | −18,099−75.6% | Reduced |
| Public Employees Retirement Association of Colorado | 6,552 | $64.0K | 0.00% | 00.0% | Unchanged |
| Skopos Labs, Inc. | 11,113 | $67.6K | 0.01% | 00.0% | Unchanged |
| Group One Trading, L.P. | 6,949 | $67.8K | 0.00% | −25,309−78.5% | Reduced |
| New York State Common Retirement Fund | 8,979 | $87.6K | 0.00% | 00.0% | Unchanged |
| China Universal Asset Management Co., Ltd. | 9,436 | $92.1K | 0.01% | −1,375−12.7% | Reduced |
| CWM, LLC | 10,246 | $100.0K | 0.00% | +8,880+650.1% | Added |
| Royal Bank of Canada | 10,331 | $101.0K | 0.00% | −95,608−90.2% | Reduced |
| Inscription Capital, LLC | 10,480 | $102.3K | 0.01% | +10,480 | New |
| Oppenheimer & Co Inc | 11,660 | $113.8K | 0.00% | −6,935−37.3% | Reduced |
| Jain Global LLC | 11,780 | $115.0K | 0.00% | −6,482−35.5% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 12,171 | $118.8K | 0.00% | +12,171 | New |
| Police & Firemen's Retirement System of New Jersey | 12,464 | $121.6K | 0.00% | +2,351+23.2% | Added |
| Cary Street Partners Financial LLC | 12,500 | $122.0K | 0.00% | 00.0% | Unchanged |
| Thrivent Financial for Lutherans | 12,980 | $127.0K | 0.00% | −25,646−66.4% | Reduced |
| Great Lakes Advisors, LLC | 13,284 | $129.7K | 0.00% | +13,284 | New |
| Jones Financial Companies LLLP | 14,000 | $131.7K | 0.00% | 00.0% | Unchanged |
| DekaBank Deutsche Girozentrale | 14,000 | $134.0K | 0.00% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 13,867 | $135.3K | 0.00% | −1,273−8.4% | Reduced |
| Corton Capital Inc. | 14,208 | $138.7K | 0.34% | +244+1.7% | Added |
| State Board of Administration of Florida Retirement System | 15,386 | $150.2K | 0.00% | 00.0% | Unchanged |
| XTX Topco Ltd | 15,808 | $154.3K | 0.01% | +15,808 | New |
| Chicago Partners Investment Group LLC | 14,841 | $156.4K | 0.00% | +82+0.6% | Added |
| The PNC Financial Services Group, Inc. | 18,137 | $177.0K | 0.00% | +109+0.6% | Added |
| Ballentine Partners, LLC | 18,310 | $178.7K | 0.00% | +18,310 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 18,834 | $183.8K | 0.00% | −2,384−11.2% | Reduced |
| MetLife Investment Management | 19,362 | $189.0K | 0.00% | −6,040−23.8% | Reduced |
| Intech Investment Management LLC | 19,388 | $189.2K | 0.00% | +1,014+5.5% | Added |
| Foundation Wealth Management, LLC | 19,471 | $190.0K | 0.12% | 00.0% | Unchanged |
| Prosight Management, LP | 20,000 | $195.2K | 0.05% | −247,800−92.5% | Reduced |
| Mogy Joel R Investment Counsel Inc | 20,750 | $202.5K | 0.01% | 00.0% | Unchanged |
| Handelsbanken Fonder AB | 20,900 | $204.0K | 0.00% | 00.0% | Unchanged |
| Atom Investors LP | 21,315 | $208.0K | 0.02% | +21,315 | New |
| Raymond James Financial Inc | 22,032 | $215.0K | 0.00% | +8,536+63.2% | Added |
| Virtus Investment Advisers, Inc. | 22,443 | $219.0K | 0.06% | +3,896+21.0% | Added |
| Edgewood Management LLC | 24,060 | $234.8K | 0.00% | 00.0% | Unchanged |
| Purkiss Capital Advisors LLC | 25,386 | $247.8K | 0.12% | +482+1.9% | Added |
| Rock Springs Capital Management LP | 25,398 | $247.9K | 0.01% | −467,203−94.8% | Reduced |
| Alps Advisors Inc | 25,727 | $251.1K | 0.00% | −3,301−11.4% | Reduced |
| Tudor Investment Corp Et Al | 27,073 | $264.2K | 0.00% | −926−3.3% | Reduced |
| Quadrature Capital Ltd | 27,215 | $265.3K | 0.00% | +3,463+14.6% | Added |
| Cambridge Investment Research Advisors, Inc. | 27,513 | $269.0K | 0.00% | +202+0.7% | Added |
| STRS Ohio | 28,800 | $281.1K | 0.00% | +12,400+75.6% | Added |