Who owns Prothena?
- Ticker: PRTA
- CUSIP Number: G72800108
Tip: Access positions for across all investors
Analyze quarterly positions in Prothena with up to 7 years of data, all consolidated into one spreadsheet
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Top investors of Prothena stock
Who bought or sold Prothena this quarter?
| Fund or Company Name | Shares Held | Valued At | Change in Shares | As Of | Actions |
|---|---|---|---|---|---|
| FMR | 7.6M | $72M | -4% | Dec 2025 |
|
| Rubric Capital Management | 5.0M | $49M | 36% | Mar 2026 |
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| BlackRock | 4.6M | $45M | 13% | Mar 2026 |
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| State Street Corporation | 2.3M | $22M | 152% | Dec 2025 |
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| Vanguard Group | 2.1M | $20M | 4% | Dec 2025 |
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| D. E. Shaw & Co | 1.8M | $17M | 5% | Mar 2026 |
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| ADAR1 Capital Management | 1.6M | $15M | 8% | Mar 2026 |
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| Acadian Asset Management | 1.5M | $15M | 8% | Mar 2026 |
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| Vanguard Portfolio Management | 1.4M | $14M | 100% | Mar 2026 |
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| Morgan Stanley | 1.2M | $12M | -1% | Mar 2026 |
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| Palo Alto Investors | 1.2M | $12M | -8% | Mar 2026 |
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| Two Sigma Investments | 1.2M | $12M | 80% | Mar 2026 |
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| Geode Capital Management | 1.1M | $11M | 3% | Mar 2026 |
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| Federated Investors | 1.1M | $10M | 9% | Mar 2026 |
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| Jacobs Levy Equity Management | 972k | $9.4M | -1% | Mar 2026 |
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| Goldman Sachs Group | 819k | $8.0M | -12% | Mar 2026 |
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| Dimensional Fund Advisors | 783k | $7.6M | 1% | Mar 2026 |
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| Nuveen | 759k | $7.4M | 0% | Mar 2026 |
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| Citadel Advisors | 573k | $5.6M | -47% | Mar 2026 |
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| Susquehanna International | 565k | $5.4M | -55% | Dec 2025 |
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| Mariner Wealth Advisors | 563k | $5.5M | -3% | Mar 2026 |
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| Monimus Capital Management | 486k | $4.7M | 91% | Mar 2026 |
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| Vanguard Capital Management | 484k | $4.7M | 100% | Mar 2026 |
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| Rangeley Capital | 450k | $4.4M | -14% | Mar 2026 |
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| Birchview Capital | 449k | $4.4M | 2% | Mar 2026 |
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| Armistice Capital | 439k | $4.3M | -76% | Mar 2026 |
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| Renaissance Technologies | 436k | $4.2M | 17% | Dec 2025 |
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| Bnp Paribas Arbitrage, Snc | 425k | $4.1M | 0% | Mar 2026 |
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| Qube Research & Technologies | 408k | $3.9M | 60% | Dec 2025 |
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| Point72 Asset Management | 400k | $3.9M | -57% | Mar 2026 |
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| Bank of America Corporation | 394k | $3.8M | 100% | Mar 2026 |
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| Man Group | 382k | $3.7M | 42% | Mar 2026 |
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| Northern Trust | 363k | $3.5M | 9% | Dec 2025 |
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| Charles Schwab Investment Management | 357k | $3.4M | 2% | Dec 2025 |
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| UBS Group | 329k | $3.2M | -23% | Mar 2026 |
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| Arrowstreet Capital, Limited Partnership | 298k | $2.8M | -54% | Dec 2025 |
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| Walleye Trading Advisors | 277k | $2.7M | 44% | Mar 2026 |
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| Penbrook Managment | 272k | $2.6M | 100% | Mar 2026 |
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| Vanguard Fiduciary Trust | 255k | $2.5M | 100% | Mar 2026 |
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| Jane Street | 250k | $2.4M | -64% | Mar 2026 |
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| Jump Financial | 238k | $2.3M | 28% | Dec 2025 |
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| Squarepoint Ops | 231k | $2.2M | 6% | Mar 2026 |
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| Focused Wealth Management | 207k | $2.0M | 93% | Mar 2026 |
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| AQR Capital Management | 204k | $2.0M | 9% | Mar 2026 |
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| Barclays | 184k | $1.8M | 87% | Dec 2025 |
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| Caption Management | 161k | $1.5M | 0% | Dec 2025 |
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| Connor, Clark & Lunn Investment Management | 157k | $1.5M | 24% | Mar 2026 |
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| Quantinno Capital Management | 144k | $1.4M | 39% | Mar 2026 |
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| Campbell & Co. Investment Adviser | 143k | $1.4M | 51% | Mar 2026 |
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| Bank of New York Mellon | 136k | $1.3M | 3% | Mar 2026 |
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| Diadema Partners | 107k | $1.0M | 100% | Dec 2025 |
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| Y-Intercept | 101k | $980k | 0% | Mar 2026 |
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| Russell Investments | 101k | $978k | 1% | Mar 2026 |
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| Ameriprise Financial | 89k | $867k | -15% | Mar 2026 |
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| Hennion & Walsh Asset Management | 89k | $861k | -3% | Mar 2026 |
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| Rafferty Asset Management | 83k | $788k | 100% | Dec 2025 |
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| American Century Companies | 79k | $753k | 9% | Dec 2025 |
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| Assenagon Asset Management | 77k | $746k | 0% | Mar 2026 |
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| DCF Advisers | 73k | $712k | -63% | Mar 2026 |
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| Creative Planning | 73k | $709k | 18% | Mar 2026 |
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| Duncan Williams Asset Management | 70k | $683k | 0% | Mar 2026 |
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| Alliancebernstein | 70k | $665k | 0% | Mar 2026 |
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| Martingale Asset Management | 69k | $672k | 9% | Mar 2026 |
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| Hsbc Holdings | 65k | $633k | 135% | Mar 2026 |
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| Gail Mannix | 61k | $590k | -3% | Mar 2026 |
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| Susquehanna Portfolio Strategies | 59k | $562k | 103% | Dec 2025 |
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| Rhumbline Advisers | 55k | $538k | -2% | Mar 2026 |
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| XTX Topco | 55k | $524k | 247% | Dec 2025 |
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| Marshall Wace | 55k | $523k | 100% | Dec 2025 |
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| Jackson Creek Investment Advisors | 54k | $526k | 100% | Mar 2026 |
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| Millennium Management | 50k | $489k | -49% | Mar 2026 |
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| Quinn Opportunity Partners | 50k | $478k | 0% | Dec 2025 |
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| Invesco | 50k | $484k | 87% | Mar 2026 |
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| Massachusetts Financial Services | 46k | $439k | -3% | Dec 2025 |
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| Seven Fleet Capital Management | 43k | $421k | 0% | Mar 2026 |
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| Ohio Pers | 42k | $403k | 0% | Dec 2025 |
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| Deutsche Bank Aktiengesellschaft | 40k | $389k | 13% | Mar 2026 |
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| Fox Run Management | 35k | $324k | 249% | Mar 2026 |
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| Winton Capital | 35k | $337k | 100% | Mar 2026 |
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| Covestor | 33k | $317k | 50% | Mar 2026 |
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| GSA Capital Partners | 33k | $316k | 23% | Mar 2026 |
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| Quadrature Capital | 31k | $297k | 100% | Dec 2025 |
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| Cornerstone Investment Partners | 31k | $298k | 100% | Mar 2026 |
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| Wintrust Financial Corporation | 30k | $288k | 124% | Mar 2026 |
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| Rbf Capital | 29k | $284k | 0% | Mar 2026 |
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| Pnc Financial Services | 28k | $276k | 1% | Mar 2026 |
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| Wells Fargo & Company | 27k | $266k | -55% | Mar 2026 |
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| Virtus Investment Advisers | 26k | $245k | 14% | Dec 2025 |
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| MetLife Investment Advisors | 26k | $244k | 32% | Dec 2025 |
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| Purkiss Capital Advisors | 25k | $244k | 0% | Mar 2026 |
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| Mirae Asset Global Etfs Holdings | 25k | $240k | -2% | Mar 2026 |
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| Trexquant Investment | 25k | $239k | 27% | Mar 2026 |
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| Tudor Investment Corporation | 25k | $238k | -8% | Mar 2026 |
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| Thomas Stevens, CFA" | 24k | $237k | -74% | Mar 2026 |
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| Edgewood Management | 24k | $230k | 0% | Dec 2025 |
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| ProFund Advisors | 24k | $233k | -22% | Mar 2026 |
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| Joel R Mogy Investment Counsel | 21k | $202k | 0% | Mar 2026 |
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| Foundation Wealth Management | 19k | $187k | 100% | Mar 2026 |
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| Vanguard Global Advisers | 18k | $177k | 100% | Mar 2026 |
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| Sei Investments | 17k | $168k | 100% | Mar 2026 |
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| Atom Investors | 17k | $163k | -20% | Dec 2025 |
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| Entropy Technologies | 17k | $161k | 100% | Dec 2025 |
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| Ballentine Partners | 17k | $163k | -7% | Mar 2026 |
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| Raymond James Financial | 17k | $157k | -25% | Dec 2025 |
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| Jones Financial Companies, L.L | 16k | $152k | 14% | Dec 2025 |
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| Florida State Board of Administration | 15k | $150k | 0% | Mar 2026 |
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| Chicago Partners Investment | 15k | $165k | 1% | Mar 2026 |
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| CHICAGO TRUST Co NA | 15k | $146k | 100% | Mar 2026 |
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| Skopos Labs | 15k | $146k | 24% | Mar 2026 |
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| OTR - Nominee Name for The State Teachers Retirement Board of Ohio | 15k | $143k | -16% | Mar 2026 |
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| SG Americas Securities | 14k | $131k | -79% | Mar 2026 |
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| Mercer Global Advisors | 13k | $127k | 100% | Mar 2026 |
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| Graham Capital Management | 13k | $125k | -54% | Mar 2026 |
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| Cary Street Partners Financial | 13k | $122k | 0% | Mar 2026 |
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| Police & Firemen's Retirement System of New Jersey | 13k | $121k | 0% | Mar 2026 |
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| Schonfeld Strategic Advisors | 12k | $121k | 100% | Mar 2026 |
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| Manufacturers Life Insurance Company | 12k | $118k | -11% | Mar 2026 |
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| Commonwealth Equity Services | 12k | $116k | 100% | Mar 2026 |
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| Intech Investment Management | 12k | $115k | -42% | Mar 2026 |
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| Inscription Capital | 11k | $102k | -2% | Mar 2026 |
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| JBF Capital | 10k | $100k | 100% | Mar 2026 |
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| Savant Capital Management | 10k | $99k | 100% | Mar 2026 |
|
| CWM | 10k | $96k | -1% | Dec 2025 |
|
| Prudential Financial | 10k | $97k | 100% | Mar 2026 |
|
| Vontobel Holding | 10k | $97k | 100% | Mar 2026 |
|
| Cresset Asset Management | 10k | $97k | 100% | Mar 2026 |
|
| China Universal Asset Management | 9.6k | $93k | 9% | Mar 2026 |
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| New York State Common Retirement Fund | 9.0k | $87k | 0% | Mar 2026 |
|
| Citigroup | 8.2k | $79k | 100% | Mar 2026 |
|
| Public Employees' Retirement Association of Colorado | 6.6k | $64k | 0% | Mar 2026 |
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| Pinnacle Wealth Planning Services | 5.7k | $55k | 0% | Mar 2026 |
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| Rockefeller Capital Management | 5.6k | $55k | 22% | Mar 2026 |
|
| Brown Brothers Harriman & Co. | 5.0k | $49k | 0% | Mar 2026 |
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| Signature | 4.7k | $46k | 31% | Mar 2026 |
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| Legal & General Group | 4.0k | $39k | -2% | Mar 2026 |
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| Summit Investment Advisors | 3.4k | $33k | 0% | Mar 2026 |
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| Group One Trading | 3.4k | $33k | 100% | Mar 2026 |
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| Royal Bank of Canada | 3.2k | $30k | -69% | Mar 2026 |
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| Tower Research Capital | 2.8k | $27k | 120% | Dec 2025 |
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| Mirae Asset Global Investments | 2.8k | $27k | 7% | Mar 2026 |
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| Farther Finance Advisors | 2.7k | $27k | 12% | Mar 2026 |
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| California State Teachers Retirement System | 2.4k | $23k | -12% | Mar 2026 |
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| Versant Capital Management | 2.2k | $21k | 7% | Mar 2026 |
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| GAMMA Investing | 2.2k | $21k | 323% | Mar 2026 |
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| Federation des caisses Desjardins du Quebec | 2.0k | $19k | 100% | Mar 2026 |
|
| Simplex Trading | 1.9k | $18k | -95% | Dec 2025 |
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| Sterling Capital Management | 1.3k | $13k | -42% | Mar 2026 |
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| Gf Fund Management | 1.2k | $12k | 13% | Mar 2026 |
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| HighMark Wealth Management | 900.00 | $8.7k | 0% | Mar 2026 |
|
| Hanson McClain Advisors | 885.00 | $8.5k | 2% | Dec 2025 |
|
| Quadrant Capital | 841.00 | $8.2k | -33% | Mar 2026 |
|
Who sold out of Prothena?
| Fund or Company Name | Date Sold | Shares Held | Valued At |
|---|---|---|---|
| Jpmorgan Chase & Co | Sep 2025 | 736k | $7.2M |
| Two Sigma Advisers | Dec 2025 | 427k | $4.1M |
| ExodusPoint Capital Management | Dec 2025 | 88k | $840k |
| Engineers Gate Manager | Sep 2025 | 56k | $547k |
| Franklin Resources | Dec 2025 | 47k | $451k |
| Sandia Investment Management | Sep 2025 | 30k | $292k |
| Persistent Asset Partners | Dec 2025 | 29k | $273k |
| Headlands Technologies | Dec 2025 | 23k | $223k |
| Prosight Management | Sep 2025 | 20k | $195k |
| Walleye Trading | Dec 2025 | 19k | $177k |
| DekaBank Deutsche Girozentrale | Dec 2025 | 14k | $383k |
| DRW Holdings | Dec 2025 | 12k | $114k |
| PDT Partners | Dec 2025 | 11k | $108k |
| ProShare Advisors | Dec 2025 | 10k | $100k |
| Canada Pension Plan Investment Board | Dec 2025 | 7.1k | $68k |
| Flagship Wealth Advisors | Dec 2025 | 1.5k | $14k |
| Amalgamated Bank | Dec 2025 | 1.4k | $13k |