Prothena Corp Public Ltd Co (PRTA) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

53,708,000Shares Outstanding
47,026,532Shares held by institutions
$416,655,057Value of institutional holdings
87.56%Institutional ownership %
1.51%Shares Changed QoQ
182No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Prothena Corp Public Ltd Co (NASDAQ:PRTA) has 182 institutional investors that have filed 13F reports for the period ending March 2026.

182 Institutional Holders

47,026,532 Total Shares Held
Download Data
Owner Name Date Shares Held Change (QoQ) Change (%) Value (USD)
FMR LLC 31 Mar, 2026 7,551,218 0 0.00% $73,397,839.00
Rubric Capital Management LP 31 Mar, 2026 5,000,000 1,322,669 35.97% $48,600,000.00
BlackRock, Inc. 31 Mar, 2026 4,644,160 536,701 13.07% $45,141,233.00
State Street Corp 31 Mar, 2026 1,938,498 -329,304 -14.52% $18,842,201.00
D. E. Shaw & Co., Inc. 31 Mar, 2026 1,763,347 81,978 4.88% $17,139,733.00
ADAR1 Capital Management, LLC 31 Mar, 2026 1,581,443 -1,334,085 -45.76% $15,371,626.00
ACADIAN ASSET MANAGEMENT LLC 31 Mar, 2026 1,547,593 110,235 7.67% $15,037.00
VANGUARD PORTFOLIO MANAGEMENT LLC 31 Mar, 2026 1,445,979 1,445,979 0.00% $14,054,916.00
Morgan Stanley 31 Mar, 2026 1,230,448 -16,327 -1.31% $11,959,961.00
Palo Alto Investors LP 31 Mar, 2026 1,208,568 -111,942 -8.48% $11,747,281.00
TWO SIGMA INVESTMENTS, LP 31 Mar, 2026 1,205,978 535,840 79.96% $11,722,106.00
GEODE CAPITAL MANAGEMENT, LLC 31 Mar, 2026 1,098,166 35,097 3.30% $10,676,629.00
Federated Hermes, Inc. 31 Mar, 2026 1,059,849 85,482 8.77% $10,301,732.00
JACOBS LEVY EQUITY MANAGEMENT, INC 31 Mar, 2026 972,017 -5,994 -0.61% $9,448,005.00
Goldman Sachs Group Inc 31 Mar, 2026 818,885 -1,051,781 -56.22% $7,959,563.00
DIMENSIONAL FUND ADVISORS LP 31 Mar, 2026 782,603 7,396 0.95% $7,606,336.00
Nuveen, LLC 31 Mar, 2026 759,368 261 0.03% $7,381,057.00
Qube Research & Technologies Ltd 31 Mar, 2026 614,603 206,914 50.75% $5,973,941.00
RENAISSANCE TECHNOLOGIES LLC 31 Mar, 2026 607,515 172,000 39.49% $5,905,046.00
Mariner, LLC 31 Mar, 2026 563,082 -14,856 -2.57% $5,473,134.00