PROTHENA CORP PLC PRTA
$9.69
+1.1% 52w: $5.72 – $11.51
Latest 13F among current holders filed 11 days ago (Jun 24, 2026)
Price — last 12 months
research preview data5.728.6211.51
Jun 20, 2025 Jul 2, 2026
Institutional holders
185
+3 QoQ
13F value
$456.6M
+1.0% QoQ
Smart-money holders
9
signal tier ≥ 2
New smart buyers
1
Q1 2026
Options barometer
2.1×
$3.3M calls / $1.6M puts
Institutional value by quarter
Number of holders
Who owns PRTA?
Q1 2026 filings| Fund | Type | Shares | Value | % of fund | Change |
|---|---|---|---|---|---|
| FMR LLC | Long only active | 7.6M | $73.4M | 0.0% | Held |
| Rubric Capital Management LP ★2 | Fundamental diversified | 5.0M | $48.6M | 0.6% | +36.0% |
| BlackRock, Inc. | Index provider | 4.6M | $45.1M | 0.0% | +13.1% |
| STATE STREET CORP | Index provider | 1.9M | $18.8M | 0.0% | -14.5% |
| D. E. Shaw & Co., Inc. | Quant stat arb | 1.8M | $17.1M | 0.0% | +4.9% |
| ADAR1 Capital Management, LLC | Other | 1.6M | $15.4M | 0.9% | +8.5% |
| ACADIAN ASSET MANAGEMENT LLC | Quant stat arb | 1.5M | $15.0M | 0.0% | +7.7% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Diversified mechanical | 1.4M | $14.1M | 0.0% | — |
| MORGAN STANLEY | Bank broker | 1.2M | $12.0M | 0.0% | -1.3% |
| Palo Alto Investors LP ★3 | Fundamental concentrated | 1.2M | $11.7M | 1.8% | -8.5% |
| TWO SIGMA INVESTMENTS, LP | Quant stat arb | 1.2M | $11.7M | 0.0% | +80.0% |
| GEODE CAPITAL MANAGEMENT, LLC | Index provider | 1.1M | $10.7M | 0.0% | +3.3% |
| FEDERATED HERMES, INC. | Diversified mechanical | 1.1M | $10.3M | 0.0% | +8.8% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Other | 972.0K | $9.4M | 0.0% | -0.6% |
| GOLDMAN SACHS GROUP INC | Bank broker | 818.9K | $8.0M | 0.0% | -12.4% |
| DIMENSIONAL FUND ADVISORS LP | Quant stat arb | 782.6K | $7.6M | 0.0% | +1.0% |
| Nuveen, LLC | Diversified mechanical | 759.4K | $7.4M | 0.0% | 0.0% |
| Qube Research & Technologies Ltd | Quant stat arb | 614.6K | $6.0M | 0.0% | +50.8% |
| RENAISSANCE TECHNOLOGIES LLC | Quant stat arb | 607.5K | $5.9M | 0.0% | +39.5% |
| Mariner, LLC | Diversified mechanical | 563.1K | $5.5M | 0.0% | -2.6% |
| MONIMUS CAPITAL MANAGEMENT, LP ★2 | Fundamental diversified | 485.6K | $4.7M | 1.3% | +91.1% |
| VANGUARD CAPITAL MANAGEMENT LLC | Diversified mechanical | 484.1K | $4.7M | 0.0% | — |
| Rangeley Capital, LLC ★2 | Fundamental diversified | 449.5K | $4.4M | 4.7% | -14.3% |
| Birchview Capital, LP ★2 | Fundamental diversified | 449.0K | $4.4M | 2.5% | +1.8% |
| ARMISTICE CAPITAL, LLC | Quant stat arb | 439.4K | $4.3M | 0.1% | -70.7% |
| CITADEL ADVISORS LLC | Multistrat pod | 435.6K | $4.2M | 0.0% | -52.3% |
| BNP PARIBAS FINANCIAL MARKETS | Bank broker | 424.6K | $4.1M | 0.0% | +0.2% |
| Point72 Asset Management, L.P. | Multistrat pod | 399.8K | $3.9M | 0.0% | -53.5% |
| BANK OF AMERICA CORP /DE/ | Bank broker | 393.6K | $3.8M | 0.0% | -7.9% |
| Man Group plc | Quant stat arb | 381.6K | $3.7M | 0.0% | +41.6% |
| NORTHERN TRUST CORP | Index provider | 369.5K | $3.6M | 0.0% | +1.7% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Index provider | 356.7K | $3.5M | 0.0% | -0.2% |
| UBS Group AG | Bank broker | 328.5K | $3.2M | 0.0% | -23.0% |
| Walleye Capital LLC | Multistrat pod | 277.2K | $2.7M | 0.0% | +77.6% |
| Penbrook Management LLC ★2 | Fundamental diversified | 271.7K | $2.6M | 2.0% | New |
| VANGUARD FIDUCIARY TRUST CO | Diversified mechanical | 254.6K | $2.5M | 0.0% | — |
| Squarepoint Ops LLC | Quant stat arb | 230.9K | $2.2M | 0.0% | +5.9% |
| Focused Wealth Management, Inc | Wealth advisor | 207.4K | $2.0M | 0.2% | +93.0% |
| AQR CAPITAL MANAGEMENT LLC | Quant stat arb | 204.0K | $2.0M | 0.0% | +9.2% |
| Connor, Clark & Lunn Investment Management Ltd. | Diversified mechanical | 156.6K | $1.5M | 0.0% | +24.4% |
| Quantinno Capital Management LP | Diversified mechanical | 144.3K | $1.4M | 0.0% | +39.3% |
| Campbell & CO Investment Adviser LLC | Diversified mechanical | 142.6K | $1.4M | 0.1% | +51.4% |
| Bank of New York Mellon Corp | Diversified mechanical | 136.3K | $1.3M | 0.0% | +2.7% |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | Other | 132.1K | $1.3M | 0.0% | +187.3% |
| Jump Financial, LLC | Market maker | 118.9K | $1.2M | 0.0% | -50.0% |
| JANE STREET GROUP, LLC | Market maker | 107.9K | $1.0M | 0.0% | -74.8% |
| Y-Intercept (Hong Kong) Ltd | Diversified mechanical | 100.8K | $980K | 0.0% | +0.3% |
| Russell Investments Group, Ltd. | Diversified mechanical | 100.6K | $978K | 0.0% | +1.3% |
| PRICE T ROWE ASSOCIATES INC /MD/ | Diversified mechanical | 95.6K | $930K | 0.0% | +17.3% |
| XTX Topco Ltd | Market maker | 92.3K | $897K | 0.0% | +68.2% |
Exits are not a bearish signal: our backtest shows stocks specialists exit keep outperforming for 3+ quarters — selling usually means profit-taking, not a forecast.
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