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 |
|---|---|---|---|---|---|
| Harbour Investments, Inc. | 1 | $10 | 0.00% | 00.0% | Unchanged |
| Assetmark, Inc | 2 | $20 | 0.00% | +2 | New |
| SJS Investment Consulting Inc. | 3 | $30 | 0.00% | +3 | New |
| Steward Partners Investment Advisory, LLC | 4 | $39 | 0.00% | −2−33.3% | Reduced |
| Clearstead Advisors, LLC | 4 | $40 | 0.00% | 00.0% | Unchanged |
| IFG Advisory, LLC | 7 | $69 | 0.00% | +7 | New |
| Rothschild Investment LLC | 10 | $98 | 0.00% | +10 | New |
| CoreCap Advisors, LLC | 11 | $108 | 0.00% | −12−52.2% | Reduced |
| Key Financial Inc | 12 | $117 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 15 | $147 | 0.00% | 00.0% | Unchanged |
| Leo H. Evart, Inc. | 22 | $215 | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 27 | $264 | 0.00% | −140−83.8% | Reduced |
| Ronald Blue Trust, Inc. | 33 | $323 | 0.00% | 00.0% | Unchanged |
| Silver Grove Financial Group, Inc. | 39 | $382 | 0.00% | +39 | New |
| Cornerstone Financial Management LLC | 55 | $538 | 0.00% | 00.0% | Unchanged |
| Cary Street Partner Investment Advisory LLC | 77 | $754 | 0.00% | +77 | New |
| Quarry LP | 90 | $881 | 0.00% | +90 | New |
| EverSource Wealth Advisors, LLC | 98 | $959 | 0.00% | −62−38.8% | Reduced |
| Harbor Investment Advisory, LLC | 100 | $979 | 0.00% | 00.0% | Unchanged |
| Gould Capital, LLC | 100 | $979 | 0.00% | 00.0% | Unchanged |
| True Wealth Design, LLC | 103 | $1.01K | 0.00% | 00.0% | Unchanged |
| Creative Financial Designs Inc | 104 | $1.02K | 0.00% | +104 | New |
| CVA Family Office, LLC | 109 | $1.07K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 112 | $1.10K | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 115 | $1.13K | 0.00% | +95+475.0% | Added |
| Albion Financial Group | 125 | $1.22K | 0.00% | 00.0% | Unchanged |
| UBS Asset Management Americas Inc | 131 | $1.28K | 0.00% | 00.0% | Unchanged |
| Axiom Investment Management LLC | 146 | $1.43K | 0.00% | +146 | New |
| Sittner & Nelson, LLC | 155 | $1.52K | 0.00% | 00.0% | Unchanged |
| Optiver Holding B.V. | 159 | $1.56K | 0.00% | −138−46.5% | Reduced |
| IFP Advisors, Inc | 167 | $1.64K | 0.00% | +152+1,013.3% | Added |
| Asset Dedication, LLC | 184 | $1.80K | 0.00% | 00.0% | Unchanged |
| Basecamp Wealth Advisors LLC | 197 | $1.93K | 0.00% | 00.0% | Unchanged |
| Evelyn Partners Group Ltd | 199 | $1.95K | 0.00% | +199 | New |
| Parallel Advisors, LLC | 210 | $2.06K | 0.00% | −86−29.1% | Reduced |
| Essential Partners LLC | 251 | $2.46K | 0.00% | −82−24.6% | Reduced |
| Advisor Group Holdings, Inc. | 278 | $2.72K | 0.00% | −94−25.3% | Reduced |
| Los Angeles Capital Management LLC | 337 | $3.30K | 0.00% | −24,082−98.6% | Reduced |
| US Bancorp | 393 | $3.85K | 0.00% | −25−6.0% | Reduced |
| Sterling Capital Management LLC | 450 | $4.41K | 0.00% | −898−66.6% | Reduced |
| 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 |
| HM Payson & Co | 600 | $5.87K | 0.00% | 00.0% | Unchanged |
| California State Teachers Retirement System | 613 | $6.00K | 0.00% | −1,770−74.3% | Reduced |
| Pacer Advisors, Inc. | 675 | $7.00K | 0.00% | +675 | New |
| Allworth Financial LP | 842 | $8.24K | 0.00% | −104−11.0% | Reduced |
| HighMark Wealth Management LLC | 900 | $8.81K | 0.00% | 00.0% | Unchanged |
| GF Fund Management Co. Ltd. | 1,141 | $11.2K | 0.00% | −58−4.8% | Reduced |
| Flagship Wealth Advisors, LLC | 1,500 | $14.7K | 0.00% | +1,500 | New |
| Quantbot Technologies LP | 1,611 | $15.8K | 0.00% | +1,611 | New |
| Versant Capital Management, Inc | 2,044 | $20.0K | 0.00% | −148−6.8% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 2,341 | $22.9K | 0.00% | −467−16.6% | Reduced |
| Farther Finance Advisors, LLC | 2,488 | $24.6K | 0.00% | −246−9.0% | Reduced |
| GAMMA Investing LLC | 2,588 | $25.3K | 0.00% | +433+20.1% | Added |
| Ameritas Investment Partners, Inc. | 3,428 | $33.6K | 0.00% | 00.0% | Unchanged |
| Signaturefd, LLC | 4,000 | $39.2K | 0.00% | −727−15.4% | Reduced |
| Legal & General Group Plc | 4,512 | $44.2K | 0.00% | +539+13.6% | Added |
| Tower Research Capital LLC (TRC) | 4,738 | $46.4K | 0.00% | +101+2.2% | Added |
| Brown Brothers Harriman & Co | 5,000 | $49.0K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 5,208 | $50.0K | 0.00% | +2,037+64.2% | Added |
| Rockefeller Capital Management L.P. | 5,132 | $50.2K | 0.00% | −481−8.6% | Reduced |
| SRS Capital Advisors, Inc. | 5,412 | $53.0K | 0.00% | +5,320+5,782.6% | Added |
| Pinnacle Wealth Planning Services, Inc. | 5,668 | $55.5K | 0.01% | 00.0% | Unchanged |
| Public Employees Retirement Association of Colorado | 6,552 | $64.0K | 0.00% | 00.0% | Unchanged |
| China Universal Asset Management Co., Ltd. | 8,332 | $81.6K | 0.00% | −1,221−12.8% | Reduced |
| New York State Common Retirement Fund | 8,979 | $87.9K | 0.00% | 00.0% | Unchanged |
| 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 |
| Quadrature Capital Ltd | 10,007 | $98.0K | 0.00% | +10,007 | New |
| JBF Capital, Inc. | 10,285 | $100.7K | 0.01% | 00.0% | Unchanged |
| Wealth Enhancement Advisory Services, LLC | 11,156 | $103.1K | 0.00% | +11,156 | New |
| Prudential Financial Inc | 11,395 | $111.6K | 0.00% | +1,370+13.7% | Added |
| Commonwealth Equity Services, LLC | 11,410 | $111.7K | 0.00% | −520−4.4% | Reduced |
| Raymond James Financial Inc | 11,446 | $112.1K | 0.00% | −438−3.7% | Reduced |
| Mercer Global Advisors Inc | 11,454 | $112.1K | 0.00% | −1,640−12.5% | Reduced |
| Inscription Capital, LLC | 11,540 | $113.0K | 0.01% | +1,060+10.1% | Added |
| Police & Firemen's Retirement System of New Jersey | 12,453 | $121.9K | 0.00% | 00.0% | Unchanged |
| Cary Street Partners Financial LLC | 12,500 | $122.4K | 0.00% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 12,635 | $123.7K | 0.00% | +451+3.7% | Added |
| nVerses Capital, LLC | 13,246 | $129.7K | 0.20% | +13,246 | New |
| Jump Financial, LLC | 13,546 | $132.6K | 0.00% | −105,390−88.6% | Reduced |
| Chicago Partners Investment Group LLC | 16,129 | $137.6K | 0.00% | +764+5.0% | Added |
| Chicago Trust Co NA | 15,057 | $147.4K | 0.02% | 00.0% | Unchanged |
| Headlands Technologies LLC | 15,077 | $147.6K | 0.02% | +15,077 | New |
| State Board of Administration of Florida Retirement System | 15,386 | $150.6K | 0.00% | 00.0% | Unchanged |
| Ballentine Partners, LLC | 16,793 | $164.4K | 0.00% | 00.0% | Unchanged |
| STRS Ohio | 17,900 | $175.2K | 0.00% | +3,200+21.8% | Added |
| Vanguard Global Advisers, LLC | 18,249 | $178.7K | 0.00% | 00.0% | Unchanged |
| Graham Capital Management, L.P. | 18,496 | $181.1K | 0.00% | +5,676+44.3% | Added |
| Foundation Wealth Management, LLC | 19,236 | $188.3K | 0.11% | 00.0% | Unchanged |
| Savant Capital, LLC | 19,503 | $190.2K | 0.00% | +9,372+92.5% | Added |
| Jones Financial Companies LLLP | 19,430 | $194.7K | 0.00% | +21+0.1% | Added |
| Profund Advisors LLC | 20,570 | $201.4K | 0.01% | −3,435−14.3% | Reduced |
| Mogy Joel R Investment Counsel Inc | 20,750 | $203.1K | 0.01% | 00.0% | Unchanged |
| Envestnet Asset Management Inc | 22,908 | $224.3K | 0.00% | +22,908 | New |
| Canada Pension Plan Investment Board | 24,000 | $235.0K | 0.00% | +24,000 | New |
| Tudor Investment Corp Et Al | 24,445 | $239.3K | 0.00% | −26−0.1% | Reduced |
| Purkiss Capital Advisors LLC | 25,086 | $245.6K | 0.09% | 00.0% | Unchanged |
| Covestor Ltd | 25,190 | $246.0K | 0.14% | −7,467−22.9% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 25,174 | $247.3K | 0.00% | +535+2.2% | Added |