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, Q2 2025
Institutional positions in Prothena Corp Public Ltd Co as of Jun 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
- 189
- +29 vs. Q1 2025
- Shares held
- 41.8M
- −10.5M (−20.2%) vs. Q1 2025
- Total value
- $253.6M
- −$393.7M (−60.8%) vs. Q1 2025
- New holders
- 51
- 54 more added
- Sold out
- 22
- 41 more reduced
1 institution that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 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, Q2 2025
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Quadrature Capital Ltd | 23,752 | $144.4K | 0.00% | +23,752 | New |
| Nebula Research & Development LLC | 22,857 | $138.7K | 0.01% | +22,857 | New |
| Ensign Peak Advisors, Inc | 21,643 | $131.4K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 21,218 | $128.8K | 0.00% | −6,116−22.4% | Reduced |
| Handelsbanken Fonder AB | 20,900 | $127.0K | 0.00% | 00.0% | Unchanged |
| Mogy Joel R Investment Counsel Inc | 20,750 | $126.0K | 0.01% | +20,750 | New |
| Foundation Wealth Management, LLC | 19,471 | $118.2K | 0.08% | 00.0% | Unchanged |
| Connor, Clark & Lunn Investment Management Ltd. | 18,896 | $114.7K | 0.00% | −72,586−79.3% | Reduced |
| Oppenheimer & Co Inc | 18,595 | $112.9K | 0.00% | +18,595 | New |
| Virtus Investment Advisers, Inc. | 18,547 | $112.6K | 0.04% | +6,656+56.0% | Added |
| Voleon Capital Management LP | 18,536 | $112.5K | 0.01% | +18,536 | New |
| Intech Investment Management LLC | 18,374 | $111.5K | 0.00% | −15,001−44.9% | Reduced |
| Jain Global LLC | 18,262 | $110.8K | 0.00% | +18,262 | New |
| Janus Henderson Group PLC | 18,047 | $109.8K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 18,028 | $109.4K | 0.00% | +17,540+3,594.3% | Added |
| Los Angeles Capital Management LLC | 16,702 | $101.4K | 0.00% | +16,702 | New |
| Chicago Partners Investment Group LLC | 14,759 | $99.8K | 0.00% | +247+1.7% | Added |
| STRS Ohio | 16,400 | $99.5K | 0.00% | +16,400 | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 15,568 | $94.5K | 0.00% | −472−2.9% | Reduced |
| State Board of Administration of Florida Retirement System | 15,386 | $93.4K | 0.00% | 00.0% | Unchanged |
| Shelton Capital Management | 15,279 | $92.7K | 0.00% | +46+0.3% | Added |
| Manufacturers Life Insurance Company, The | 15,140 | $91.9K | 0.00% | −50,091−76.8% | Reduced |
| Jones Financial Companies LLLP | 14,000 | $85.1K | 0.00% | +14,000 | New |
| Corton Capital Inc. | 13,964 | $84.8K | 0.10% | +13,964 | New |
| DekaBank Deutsche Girozentrale | 14,000 | $84.0K | 0.00% | 00.0% | Unchanged |
| Raymond James Financial Inc | 13,496 | $81.9K | 0.00% | +1,009+8.1% | Added |
| Tower Research Capital LLC (TRC) | 12,709 | $77.1K | 0.00% | +10,815+571.0% | Added |
| Cary Street Partners Financial LLC | 12,500 | $75.9K | 0.00% | 00.0% | Unchanged |
| Voya Investment Management LLC | 11,896 | $72.2K | 0.00% | +212+1.8% | Added |
| Commonwealth Equity Services, LLC | 11,820 | $72.0K | 0.00% | −1,500−11.3% | Reduced |
| Two Sigma Securities, LLC | 11,683 | $70.9K | 0.01% | +11,683 | New |
| Coastal Bridge Advisors, LLC | 11,433 | $69.4K | 0.01% | +11,433 | New |
| Skopos Labs, Inc. | 11,113 | $67.5K | 0.01% | +9,359+533.6% | Added |
| China Universal Asset Management Co., Ltd. | 10,811 | $65.6K | 0.01% | +14+0.1% | Added |
| Police & Firemen's Retirement System of New Jersey | 10,113 | $61.4K | 0.00% | 00.0% | Unchanged |
| Prospera Financial Services Inc | 10,000 | $60.7K | 0.00% | +10,000 | New |
| Legal & General Group Plc | 9,323 | $56.6K | 0.00% | −32,031−77.5% | Reduced |
| US Bancorp | 9,031 | $54.8K | 0.00% | +8,519+1,663.9% | Added |
| New York State Common Retirement Fund | 8,979 | $54.5K | 0.00% | −5,300−37.1% | Reduced |
| KLP Kapitalforvaltning AS | 6,700 | $40.7K | 0.00% | 00.0% | Unchanged |
| Public Employees Retirement Association of Colorado | 6,552 | $40.0K | 0.00% | 00.0% | Unchanged |
| Brown Brothers Harriman & Co | 5,000 | $30.4K | 0.00% | +5,000 | New |
| Ameritas Investment Partners, Inc. | 4,368 | $26.5K | 0.00% | 00.0% | Unchanged |
| Signaturefd, LLC | 3,357 | $20.4K | 0.00% | +2,997+832.5% | Added |
| Farther Finance Advisors, LLC | 2,457 | $14.9K | 0.00% | +1,490+154.1% | Added |
| Mirae Asset Global Investments Co., Ltd. | 2,079 | $12.6K | 0.00% | +278+15.4% | Added |
| Walleye Capital LLC | 2,058 | $12.5K | 0.00% | +2,058 | New |
| Versant Capital Management, Inc | 2,044 | $12.4K | 0.00% | +1,513+284.9% | Added |
| HighMark Wealth Management LLC | 2,018 | $12.2K | 0.01% | 00.0% | Unchanged |
| Flagship Wealth Advisors, LLC | 1,500 | $9.11K | 0.00% | +1,500 | New |
| Amalgamated Bank | 1,440 | $9.00K | 0.00% | 00.0% | Unchanged |
| GF Fund Management Co. Ltd. | 1,377 | $8.36K | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 1,366 | $8.00K | 0.00% | +731+115.1% | Added |
| SBI Securities Co., Ltd. | 962 | $5.84K | 0.00% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 959 | $5.82K | 0.00% | +628+189.7% | Added |
| IFP Advisors, Inc | 0 | $5.54K | 0.00% | −132−100.0% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 683 | $4.00K | 0.00% | +683 | New |
| HM Payson & Co | 600 | $3.64K | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 593 | $3.60K | 0.00% | +523+747.1% | Added |
| Nisa Investment Advisors, LLC | 526 | $3.19K | 0.00% | −711−57.5% | Reduced |
| Point72 Asia (Singapore) Pte. Ltd. | 459 | $2.79K | 0.00% | +459 | New |
| Allworth Financial LP | 372 | $2.26K | 0.00% | +325+691.5% | Added |
| Huntington National Bank | 324 | $1.97K | 0.00% | +324 | New |
| Manchester Capital Management LLC | 250 | $1.52K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 247 | $1.50K | 0.00% | +86+53.4% | Added |
| Spire Wealth Management | 200 | $1.21K | 0.00% | 00.0% | Unchanged |
| Evelyn Partners Investment Management LLP | 199 | $1.21K | 0.00% | 00.0% | Unchanged |
| GAMMA Investing LLC | 197 | $1.20K | 0.00% | −288−59.4% | Reduced |
| Asset Dedication, LLC | 184 | $1.12K | 0.00% | 00.0% | Unchanged |
| Daiwa Securities Group Inc. | 195 | $1.00K | 0.00% | 00.0% | Unchanged |
| North Capital, Inc. | 159 | $965 | 0.00% | 00.0% | Unchanged |
| Sittner & Nelson, LLC | 155 | $941 | 0.00% | 00.0% | Unchanged |
| MAI Capital Management | 155 | $941 | 0.00% | +155 | New |
| Albion Financial Group | 125 | $759 | 0.00% | 00.0% | Unchanged |
| Harbor Investment Advisory, LLC | 100 | $607 | 0.00% | 00.0% | Unchanged |
| Gould Capital, LLC | 100 | $607 | 0.00% | 00.0% | Unchanged |
| CVA Family Office, LLC | 72 | $437 | 0.00% | 00.0% | Unchanged |
| Truvestments Capital LLC | 69 | $418 | 0.00% | +1+1.5% | Added |
| CIBC Private Wealth Group, LLC | 49 | $297 | 0.00% | 00.0% | Unchanged |
| Ronald Blue Trust, Inc. | 33 | $200 | 0.00% | −678−95.4% | Reduced |
| CoreCap Advisors, LLC | 23 | $140 | 0.00% | 00.0% | Unchanged |
| Key Financial Inc | 12 | $73 | 0.00% | 00.0% | Unchanged |
| Lowe Wealth Advisors, LLC | 10 | $61 | 0.00% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 6 | $36 | 0.00% | +6 | New |
| Clearstead Advisors, LLC | 4 | $25 | 0.00% | 00.0% | Unchanged |
| Whittier Trust Co of Nevada Inc | 3 | $18 | 0.00% | 00.0% | Unchanged |
| CBIZ Investment Advisory Services, LLC | 2 | $12 | 0.00% | 00.0% | Unchanged |
| Koesten, Hirschmann & Crabtree, INC. | 1 | $9 | 0.00% | +1 | New |
| Harbour Investments, Inc. | 1 | $6 | 0.00% | −2−66.7% | Reduced |
| EcoR1 Capital, LLC | 0 | $0 | 0.00% | −11,584,280−100.0% | Sold out |
| Siren, L.L.C. | 0 | $0 | 0.00% | −1,283,555−100.0% | Sold out |
| Boxer Capital Management, LLC | 0 | $0 | 0.00% | −690,000−100.0% | Sold out |
| Finepoint Capital LP | 0 | $0 | 0.00% | −640,071−100.0% | Sold out |
| TD Asset Management Inc | 0 | $0 | 0.00% | −62,694−100.0% | Sold out |
| Rafferty Asset Management, LLC | 0 | $0 | 0.00% | −43,978−100.0% | Sold out |
| Corebridge Financial, Inc. | 0 | $0 | 0.00% | −20,831−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −14,036−100.0% | Sold out |
| Cresset Asset Management, LLC | 0 | $0 | 0.00% | −13,125−100.0% | Sold out |
| ProShare Advisors LLC | 0 | $0 | 0.00% | −11,632−100.0% | Sold out |
| Amundi | 0 | $0 | 0.00% | −2,014−100.0% | Sold out |