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 2026
Institutional positions in Prothena Corp Public Ltd Co as of Jun 30, 2026. 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
- +5 vs. Q1 2026
- Shares held
- 47.3M
- +304.2K (+0.6%) vs. Q1 2026
- Total value
- $462.7M
- +$6.28M (+1.4%) vs. Q1 2026
- New holders
- 28
- 55 more added
- Sold out
- 23
- 58 more reduced
4 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 2026
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Ballentine Partners, LLC | 16,793 | $164.4K | 0.00% | 00.0% | Unchanged |
| State Board of Administration of Florida Retirement System | 15,386 | $150.6K | 0.00% | 00.0% | Unchanged |
| Headlands Technologies LLC | 15,077 | $147.6K | 0.02% | +15,077 | New |
| Chicago Trust Co NA | 15,057 | $147.4K | 0.02% | 00.0% | Unchanged |
| Chicago Partners Investment Group LLC | 16,129 | $137.6K | 0.00% | +764+5.0% | Added |
| Jump Financial, LLC | 13,546 | $132.6K | 0.00% | −105,390−88.6% | Reduced |
| nVerses Capital, LLC | 13,246 | $129.7K | 0.20% | +13,246 | New |
| Manufacturers Life Insurance Company, The | 12,635 | $123.7K | 0.00% | +451+3.7% | Added |
| Cary Street Partners Financial LLC | 12,500 | $122.4K | 0.00% | 00.0% | Unchanged |
| Police & Firemen's Retirement System of New Jersey | 12,453 | $121.9K | 0.00% | 00.0% | Unchanged |
| Inscription Capital, LLC | 11,540 | $113.0K | 0.01% | +1,060+10.1% | Added |
| Mercer Global Advisors Inc | 11,454 | $112.1K | 0.00% | −1,640−12.5% | Reduced |
| Raymond James Financial Inc | 11,446 | $112.1K | 0.00% | −438−3.7% | Reduced |
| Commonwealth Equity Services, LLC | 11,410 | $111.7K | 0.00% | −520−4.4% | Reduced |
| Prudential Financial Inc | 11,395 | $111.6K | 0.00% | +1,370+13.7% | Added |
| Wealth Enhancement Advisory Services, LLC | 11,156 | $103.1K | 0.00% | +11,156 | New |
| JBF Capital, Inc. | 10,285 | $100.7K | 0.01% | 00.0% | Unchanged |
| Quadrature Capital Ltd | 10,007 | $98.0K | 0.00% | +10,007 | New |
| Cresset Asset Management, LLC | 10,000 | $97.9K | 0.00% | 00.0% | Unchanged |
| Cornerstone Select Advisors, LLC | 10,000 | $97.9K | 0.04% | +10,000 | New |
| New York State Common Retirement Fund | 8,979 | $87.9K | 0.00% | 00.0% | Unchanged |
| China Universal Asset Management Co., Ltd. | 8,332 | $81.6K | 0.00% | −1,221−12.8% | Reduced |
| Public Employees Retirement Association of Colorado | 6,552 | $64.0K | 0.00% | 00.0% | Unchanged |
| Pinnacle Wealth Planning Services, Inc. | 5,668 | $55.5K | 0.01% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 5,412 | $53.0K | 0.00% | +5,320+5,782.6% | Added |
| Rockefeller Capital Management L.P. | 5,132 | $50.2K | 0.00% | −481−8.6% | Reduced |
| Royal Bank of Canada | 5,208 | $50.0K | 0.00% | +2,037+64.2% | Added |
| Brown Brothers Harriman & Co | 5,000 | $49.0K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 4,738 | $46.4K | 0.00% | +101+2.2% | Added |
| Legal & General Group Plc | 4,512 | $44.2K | 0.00% | +539+13.6% | Added |
| Signaturefd, LLC | 4,000 | $39.2K | 0.00% | −727−15.4% | Reduced |
| Ameritas Investment Partners, Inc. | 3,428 | $33.6K | 0.00% | 00.0% | Unchanged |
| GAMMA Investing LLC | 2,588 | $25.3K | 0.00% | +433+20.1% | Added |
| Farther Finance Advisors, LLC | 2,488 | $24.6K | 0.00% | −246−9.0% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 2,341 | $22.9K | 0.00% | −467−16.6% | Reduced |
| Versant Capital Management, Inc | 2,044 | $20.0K | 0.00% | −148−6.8% | Reduced |
| Quantbot Technologies LP | 1,611 | $15.8K | 0.00% | +1,611 | New |
| Flagship Wealth Advisors, LLC | 1,500 | $14.7K | 0.00% | +1,500 | New |
| GF Fund Management Co. Ltd. | 1,141 | $11.2K | 0.00% | −58−4.8% | Reduced |
| HighMark Wealth Management LLC | 900 | $8.81K | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 842 | $8.24K | 0.00% | −104−11.0% | Reduced |
| Pacer Advisors, Inc. | 675 | $7.00K | 0.00% | +675 | New |
| California State Teachers Retirement System | 613 | $6.00K | 0.00% | −1,770−74.3% | Reduced |
| HM Payson & Co | 600 | $5.87K | 0.00% | 00.0% | Unchanged |
| Federation des caisses Desjardins du Quebec | 500 | $4.89K | 0.00% | −1,500−75.0% | Reduced |
| Northwestern Mutual Wealth Management Co | 500 | $4.89K | 0.00% | +450+900.0% | Added |
| Sterling Capital Management LLC | 450 | $4.41K | 0.00% | −898−66.6% | Reduced |
| US Bancorp | 393 | $3.85K | 0.00% | −25−6.0% | Reduced |
| Los Angeles Capital Management LLC | 337 | $3.30K | 0.00% | −24,082−98.6% | Reduced |
| Advisor Group Holdings, Inc. | 278 | $2.72K | 0.00% | −94−25.3% | Reduced |
| Essential Partners LLC | 251 | $2.46K | 0.00% | −82−24.6% | Reduced |
| Parallel Advisors, LLC | 210 | $2.06K | 0.00% | −86−29.1% | Reduced |
| Evelyn Partners Group Ltd | 199 | $1.95K | 0.00% | +199 | New |
| Basecamp Wealth Advisors LLC | 197 | $1.93K | 0.00% | 00.0% | Unchanged |
| Asset Dedication, LLC | 184 | $1.80K | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 167 | $1.64K | 0.00% | +152+1,013.3% | Added |
| Optiver Holding B.V. | 159 | $1.56K | 0.00% | −138−46.5% | Reduced |
| Sittner & Nelson, LLC | 155 | $1.52K | 0.00% | 00.0% | Unchanged |
| Axiom Investment Management LLC | 146 | $1.43K | 0.00% | +146 | New |
| UBS Asset Management Americas Inc | 131 | $1.28K | 0.00% | 00.0% | Unchanged |
| Albion Financial Group | 125 | $1.22K | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 115 | $1.13K | 0.00% | +95+475.0% | Added |
| Nisa Investment Advisors, LLC | 112 | $1.10K | 0.00% | 00.0% | Unchanged |
| CVA Family Office, LLC | 109 | $1.07K | 0.00% | 00.0% | Unchanged |
| Creative Financial Designs Inc | 104 | $1.02K | 0.00% | +104 | New |
| True Wealth Design, LLC | 103 | $1.01K | 0.00% | 00.0% | Unchanged |
| Harbor Investment Advisory, LLC | 100 | $979 | 0.00% | 00.0% | Unchanged |
| Gould Capital, LLC | 100 | $979 | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 98 | $959 | 0.00% | −62−38.8% | Reduced |
| Quarry LP | 90 | $881 | 0.00% | +90 | New |
| Cary Street Partner Investment Advisory LLC | 77 | $754 | 0.00% | +77 | New |
| Cornerstone Financial Management LLC | 55 | $538 | 0.00% | 00.0% | Unchanged |
| Silver Grove Financial Group, Inc. | 39 | $382 | 0.00% | +39 | New |
| Ronald Blue Trust, Inc. | 33 | $323 | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 27 | $264 | 0.00% | −140−83.8% | Reduced |
| Leo H. Evart, Inc. | 22 | $215 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 15 | $147 | 0.00% | 00.0% | Unchanged |
| Key Financial Inc | 12 | $117 | 0.00% | 00.0% | Unchanged |
| CoreCap Advisors, LLC | 11 | $108 | 0.00% | −12−52.2% | Reduced |
| Rothschild Investment LLC | 10 | $98 | 0.00% | +10 | New |
| IFG Advisory, LLC | 7 | $69 | 0.00% | +7 | New |
| Clearstead Advisors, LLC | 4 | $40 | 0.00% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 4 | $39 | 0.00% | −2−33.3% | Reduced |
| SJS Investment Consulting Inc. | 3 | $30 | 0.00% | +3 | New |
| Assetmark, Inc | 2 | $20 | 0.00% | +2 | New |
| Harbour Investments, Inc. | 1 | $10 | 0.00% | 00.0% | Unchanged |
| Coppell Advisory Solutions LLC | 12 | – | – | +12 | New |
| Armistice Capital, LLC | 0 | $0 | 0.00% | −439,411−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −399,830−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −277,168−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −107,926−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −100,805−100.0% | Sold out |
| Jackson Creek Investment Advisors LLC | 0 | $0 | 0.00% | −54,089−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −35,052−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −32,499−100.0% | Sold out |
| Cornerstone Investment Partners, LLC | 0 | $0 | 0.00% | −30,687−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −17,792−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −13,522−100.0% | Sold out |
| Intech Investment Management LLC | 0 | $0 | 0.00% | −11,874−100.0% | Sold out |
| Vontobel Holding Ltd. | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |