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Prothena shares owned by Cambridge Investment Research Advisors

Quarter-by-quarter ownership of Prothena (PRTA) shares owned by Cambridge Investment Research Advisors from 13F filings

Historical chart of Cambridge Investment Research Advisors investment in Prothena

Tip: Access up to 7 years of quarterly data

All positions including Prothena held by Cambridge Investment Research Advisors consolidated in one spreadsheet with up to 7 years of data

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Quarterly reported holdings in Prothena by Cambridge Investment Research Advisors

Quarter filed Position value Share count Share price at filing
2025-09-30 $269k 28k 9.78
2025-06-30 $166k 27k 6.08
2025-03-31 $126k 10k 12.40
2023-12-31 $217k 6.0k 36.26

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View all positions for Cambridge Investment Research Advisors

Top funds holding Prothena

FMR
BlackRock
Vanguard Group
Armistice Capital
Rubric Capital Management
ADAR1 Capital Management
Palo Alto Investors
D. E. Shaw & Co
Susquehanna International
Acadian Asset Management
Geode Capital Management
Citadel Advisors
Morgan Stanley
State Street Corporation
Jane Street

View all funds holding Prothena