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ISSUER PROFILE · CIK 0001559053 · CUSIP G72800108

PROTHENA CORP PUBLIC LTD COPRTA

1 13D/G filings 1 distinct filers 1 insider transactions (365d)

Post-Filing Returns · across 1 activist filings on this issuer

Median 30d
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Median 60d
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Median 90d
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Median 180d
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Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.

Cross-Reference Snapshot

Activist filings
1
1 SCHEDULE
Distinct filers
1
single filer
Insiders (365d)
1
1 buys · 0 sales
Latest short DTC
12.32
as of 2026-03-31

Institutional Consensus · 2025-12-31

Held by elite portfolio managers
1 holder · $8.78M
Point72 Asset Mgmt

13D/G Filings Timeline · 1 total

FiledFormFilerStakeSharesIntent
2025-01-03 SCHEDULE EcoR1 Capital, LLC 21.50% 11,584,280 view →

Form 4 Insider Transactions · last 365d

DateInsiderRoleTypeSharesPriceValue
2026-04-10 Kingston Anne Evans officer Award 100,000 $10.50 $1.05M

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-03-31 7,016,080 12.32 -0.4%
2026-03-13 7,044,790 11.20 +2.8%
2026-02-27 6,854,767 17.22 -3.2%
2026-02-13 7,083,043 18.12 +0.3%
2026-01-30 7,063,694 13.90 -0.1%
2026-01-15 7,069,471 14.42 +7.4%
2025-12-31 6,584,532 7.96 +40.1%
2025-12-15 4,699,126 6.78 +1.3%

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