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Prothena shares owned by Brown Brothers Harriman & Co.

Quarter-by-quarter ownership of Prothena (PRTA) shares owned by Brown Brothers Harriman & Co. from 13F filings

Historical chart of Brown Brothers Harriman & Co. investment in Prothena

Tip: Access up to 7 years of quarterly data

All positions including Prothena held by Brown Brothers Harriman & Co. consolidated in one spreadsheet with up to 7 years of data

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Quarterly reported holdings in Prothena by Brown Brothers Harriman & Co.

Quarter filed Position value Share count Share price at filing
2025-09-30 $49k 5.0k 9.76
2025-06-30 $30k 5.0k 6.07

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Top funds holding Prothena

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