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Prothena shares owned by Atom Investors

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

Historical chart of Atom Investors investment in Prothena

Tip: Access up to 7 years of quarterly data

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

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Quarterly reported holdings in Prothena by Atom Investors

Quarter filed	Position value	Share count	Share price at filing
2025-09-30	$208k	21k	9.76
2024-03-31	$230k	9.3k	24.77

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View all positions for Atom Investors

Top funds holding Prothena

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

State Street Corporation

View all funds holding Prothena

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