ADAR1 Capital Management, LLC - 30 Sep 2025 SCHEDULE 13G/A Report for Prothena Corporation Public Limited Company Ordinary Shares, par value $0.01 per share (PRTA)

Filing Manager
ADAR1 Capital Management, LLC
Reporting Manager
ADAR1 Capital Management, LLC
Security
Prothena Corporation Public Limited Company Ordinary Shares, par value $0.01 per share
Symbol
PRTA
Shares outstanding
54,411,037 shares
Disclosed Ownership
1,469,098 shares
Ownership
2.7%
Form type
SCHEDULE 13G/A
Filing time
14 Nov 2025, 19:47:09 UTC
Date of event
30 Sep 2025
Previous filing
14 Aug 2025
SEC
View on sec.gov

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
ADAR1 Capital Management, LLC 2.7% 1,469,098 0 1,469,098 /s/ Daniel Schneeberger Daniel Schneeberger, Manager
ADAR1 Capital Management GP, LLC 2.2% 1,189,587 0 1,189,587 /s/ Daniel Schneeberger Daniel Schneeberger, Manager
Daniel Schneeberger 2.7% 1,469,098 0 1,469,098 /s/ Daniel Schneeberger Daniel Schneeberger, in his individual capacity