Prothena Corporation plc Major Shareholders & Ownership History
| Major Shareholder Name | Reporting Date | Shares Held | Market Value | Change in Shares | Ownership |
|---|---|---|---|---|---|
| FMR LLC | 08/13/2026 | 7.20 M | $70.48 M | -4.66% | 13.81% |
| RUBRIC CAPITAL MANAGEMENT LP | 08/14/2026 | 5.00 M | $48.95 M | 0.00% | 9.59% |
| BLACKROCK, INC. | 08/07/2026 | 4.87 M | $47.66 M | 4.82% | 9.34% |
| STATE STREET CORP | 08/07/2026 | 2.39 M | $23.43 M | 23.47% | 4.59% |
| ACADIAN ASSET MANAGEMENT LLC | 08/13/2026 | 2.01 M | $19.68 M | 29.92% | 3.86% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 08/13/2026 | 1.65 M | $16.17 M | 14.20% | 3.17% |
| D. E. SHAW & CO., INC. | 08/14/2026 | 1.61 M | $15.78 M | -8.61% | 3.09% |
| ADAR1 CAPITAL MANAGEMENT, LLC | 08/14/2026 | 1.55 M | $15.22 M | -1.70% | 2.98% |
| TWO SIGMA INVESTMENTS, LP | 08/14/2026 | 1.26 M | $12.38 M | 4.89% | 2.43% |
| PALO ALTO INVESTORS LP | 08/19/2026 | 1.14 M | $11.19 M | -5.41% | 2.19% |
| GEODE CAPITAL MANAGEMENT, LLC | 08/12/2026 | 1.13 M | $11.02 M | 2.52% | 2.16% |
| FEDERATED HERMES, INC. | 08/12/2026 | 1.08 M | $10.62 M | 2.32% | 2.08% |
| MORGAN STANLEY | 08/13/2026 | 995.35 K | $9.74 M | -19.11% | 1.91% |
| GOLDMAN SACHS GROUP INC | 08/14/2026 | 979.73 K | $9.59 M | 19.64% | 1.88% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 08/14/2026 | 965.99 K | $9.46 M | -0.62% | 1.85% |
| DIMENSIONAL FUND ADVISORS LP | 08/11/2026 | 905.65 K | $8.87 M | 15.72% | 1.74% |
| QUBE RESEARCH & TECHNOLOGIES LTD | 08/14/2026 | 791.17 K | $7.75 M | 28.73% | 1.52% |
| RENAISSANCE TECHNOLOGIES LLC | 08/13/2026 | 697.62 K | $6.83 M | 14.83% | 1.34% |
| MAN GROUP PLC | 08/14/2026 | 678.12 K | $6.64 M | 77.72% | 1.30% |
| MARINER, LLC | 08/13/2026 | 625.10 K | $6.12 M | 11.01% | 1.20% |
| NUVEEN, LLC | 08/11/2026 | 557.16 K | $5.45 M | -26.63% | 1.07% |
| VANGUARD CAPITAL MANAGEMENT LLC | 08/13/2026 | 479.95 K | $4.70 M | -0.86% | 0.92% |
| NORTHERN TRUST CORP | 08/13/2026 | 457.12 K | $4.48 M | 23.70% | 0.88% |
| BIRCHVIEW CAPITAL, LP | 08/14/2026 | 449.02 K | $4.40 M | 0.00% | 0.86% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 08/14/2026 | 420.90 K | $4.12 M | 205.00% | 0.81% |
| RANGELEY CAPITAL, LLC | 08/14/2026 | 417.27 K | $4.09 M | -7.16% | 0.80% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 08/14/2026 | 355.90 K | $3.48 M | -0.22% | 0.68% |
| SIXTH STREET PARTNERS MANAGEMENT COMPANY, L.P. | 08/14/2026 | 355.90 K | $3.48 M | 100.00% | 0.68% |
| CITADEL ADVISORS LLC | 09/02/2026 | 338.81 K | $3.32 M | -22.22% | 0.65% |
| MONIMUS CAPITAL MANAGEMENT, LP | 08/14/2026 | 329.05 K | $3.22 M | -32.24% | 0.63% |
| BNP PARIBAS ARBITRAGE, SNC | 08/13/2026 | 315.80 K | $3.09 M | -25.62% | 0.61% |
| AQR CAPITAL MANAGEMENT LLC | 08/14/2026 | 302.57 K | $2.96 M | 48.31% | 0.58% |
| PENBROOK MANAGEMENT LLC | 07/23/2026 | 271.72 K | $2.66 M | 0.00% | 0.52% |
| VANGUARD FIDUCIARY TRUST CO | 08/13/2026 | 259.06 K | $2.54 M | 1.76% | 0.50% |
| UBS GROUP AG | 08/13/2026 | 241.43 K | $2.36 M | -26.50% | 0.46% |
| MACKENZIE FINANCIAL CORP | 08/13/2026 | 239.90 K | $2.35 M | 100.00% | 0.46% |
| SQUAREPOINT OPS LLC | 08/14/2026 | 223.97 K | $2.19 M | -3.01% | 0.43% |
| BANK OF AMERICA CORP /DE/ | 08/14/2026 | 208.25 K | $2.04 M | -47.10% | 0.40% |
| FOCUSED WEALTH MANAGEMENT, INC | 08/07/2026 | 207.45 K | $2.03 M | 0.02% | 0.40% |
| CONNOR, CLARK & LUNN INVESTMENT MANAGEMENT LTD. | 08/13/2026 | 191.69 K | $1.88 M | 22.45% | 0.37% |
| MARSHALL WACE, LLP | 08/13/2026 | 190.83 K | $1.87 M | 328.13% | 0.37% |
| QUANTINNO CAPITAL MANAGEMENT LP | 08/13/2026 | 158.33 K | $1.55 M | 9.72% | 0.30% |
| MILLENNIUM MANAGEMENT LLC | 08/14/2026 | 149.90 K | $1.47 M | 198.01% | 0.29% |
| DIADEMA PARTNERS LP | 08/14/2026 | 149.48 K | $1.46 M | 100.00% | 0.29% |
| CITADEL ADVISORS LLC | 09/02/2026 | 142.30 K | $1.39 M | 62.81% | 0.27% |
| BANK OF NEW YORK MELLON CORP | 08/06/2026 | 133.91 K | $1.31 M | -1.77% | 0.26% |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 08/03/2026 | 126.99 K | $1.24 M | -3.83% | 0.24% |
| RUSSELL INVESTMENTS GROUP, LTD. | 08/06/2026 | 121.90 K | $1.19 M | 21.14% | 0.23% |
| CITADEL ADVISORS LLC | 09/02/2026 | 116.90 K | $1.14 M | 134.74% | 0.22% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 08/14/2026 | 109.25 K | $1.07 M | 14.22% | 0.21% |
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Prothena Corporation plc institutional Ownership - FAQ's
During the previous two years, 290 institutional investors and hedge funds held shares of Prothena Corporation plc. The most heavily invested institutionals were:
FMR LLC: 7.2 M
Rubric Capital Management LP: 5 M
BlackRock, Inc.: 4.87 M
STATE STREET CORP: 2.39 M
ACADIAN ASSET MANAGEMENT LLC: 2.01 M
VANGUARD PORTFOLIO MANAGEMENT LLC: 1.65 M
91.31% of Prothena Corporation plc stock is owned by institutional investors.
Institutional investors have bought a total of 58.57 M shares in the last 24 months. This purchase volume represents approximately $574.57 M in transactions.