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Cornerstone Investment Partners »

Prothena shares owned by Cornerstone Investment Partners

Quarter-by-quarter ownership of Prothena (PRTA) shares owned by Cornerstone Investment Partners from 13F filings

Historical chart of Cornerstone Investment Partners investment in Prothena

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All positions including Prothena held by Cornerstone Investment Partners consolidated in one spreadsheet with up to 7 years of data

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Quarterly reported holdings in Prothena by Cornerstone Investment Partners

Quarter filed	Position value	Share count	Share price at filing
2026-03-31	$298k	31k	9.72

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