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Prothena shares owned by Penbrook Managment

Quarter-by-quarter ownership of Prothena (PRTA) shares owned by Penbrook Managment from 13F filings

Historical chart of Penbrook Managment investment in Prothena

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All positions including Prothena held by Penbrook Managment consolidated in one spreadsheet with up to 7 years of data

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Quarterly reported holdings in Prothena by Penbrook Managment

Quarter filed Position value Share count Share price at filing
2026-03-31 $2.6M 272k 9.72

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Top funds holding Prothena

FMR
BlackRock
Rubric Capital Management
State Street Corporation
Vanguard Group
D. E. Shaw & Co
ADAR1 Capital Management
Acadian Asset Management
Palo Alto Investors
Citadel Advisors
Geode Capital Management
Jacobs Levy Equity Management
Federated Investors
Goldman Sachs Group
Point72 Asset Management

View all funds holding Prothena