Who Owns PROTHENA CORP PLC (PRTA)? -- Institutional Holders (2026-06-30)

209 institutions reported holding $482.5M of PROTHENA CORP PLC (PRTA) in SEC 13F filings for 2026-06-30. Largest institutional holders: FMR LLC ($70.5M), Rubric Capital Management LP ($49.0M), BlackRock, Inc. ($47.7M), VANGUARD GROUP INC ($23.6M), STATE STREET CORP ($23.4M). Source: SEC Form 13F.

RankInstitutionValueSharesChange
1FMR LLC$70.5M7.2MTrimmed
2Rubric Capital Management LP$49.0M5.0MHold
3BlackRock, Inc.$47.7M4.9MAdded
4VANGUARD GROUP INC$23.6M2.4MAdded
5STATE STREET CORP$23.4M2.4MAdded
6ACADIAN ASSET MANAGEMENT LLC$19.7M2.0MAdded
7D. E. Shaw & Co., Inc.$15.8M1.6MTrimmed
8ADAR1 Capital Management, LLC$15.2M1.6MTrimmed
9TWO SIGMA INVESTMENTS, LP$12.4M1.3MAdded
10Palo Alto Investors LP$11.2M1.1MTrimmed
11GEODE CAPITAL MANAGEMENT, LLC$11.0M1.1MAdded
12FEDERATED HERMES, INC.$10.6M1.1MAdded
13MORGAN STANLEY$9.7M995,348Trimmed
14GOLDMAN SACHS GROUP INC$9.6M979,730Added
15JACOBS LEVY EQUITY MANAGEMENT, INC$9.5M965,988Trimmed
16DIMENSIONAL FUND ADVISORS LP$8.9M905,651Added
17Qube Research & Technologies Ltd$7.7M791,169Added
18RENAISSANCE TECHNOLOGIES LLC$6.8M697,615Added
19Man Group plc$6.6M678,116Added
20Mariner, LLC$6.1M625,095Added
21CITADEL ADVISORS LLC$5.9M598,010Added
22Nuveen, LLC$5.5M557,157Trimmed
23SUSQUEHANNA INTERNATIONAL GROUP, LLP$4.8M486,900Added
24NORTHERN TRUST CORP$4.5M457,124Added
25Birchview Capital, LP$4.4M449,019Hold

Source: SEC Form 13F filings · as of 2026-06-30