Javascript is disabled or is not supported by your browser. Please upgrade your browser or enable Javascript to navigate the interface properly.

Siren »

Prothena shares owned by Siren

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

Historical chart of Siren investment in Prothena

Tip: Access up to 7 years of quarterly data

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

Download as csv

Download consolidated filings csv

Download as Excel

Download consolidated filings xlsx

Quarterly reported holdings in Prothena by Siren

Quarter filed	Position value	Share count	Share price at filing
2024-09-30	$18M	1.1M	16.73

More positions owned by Siren

Kymera Therapeutics (KYMR)

Beigene Sponsored Adr

Scholar Rock Hldg Corp (SRRK)

Bicara Therapeutics (BCAX)

Argenx SE Sponsored Adr (ARGX)

Crinetics Pharmaceuticals In (CRNX)

Avidity Biosciences Ord (RNA)

Apellis Pharmaceuticals (APLS)

Lexicon Pharmaceuticals Com New (LXRX)

Igm Biosciences (IGMS)

Centessa Pharmaceuticals Sponsored Ads (CNTA)

Ascendis Pharma A/S Sponsored Adr (ASND)

Silence Therapeutics Ads (SLN)

Arrowhead Pharmaceuticals (ARWR)

WAVE Life Sciences SHS (WVE)

View all positions for Siren

Top funds holding Prothena

Wellington Management Company

T. Rowe Price Associates

Armistice Capital

State Street Corporation

Palo Alto Investors

Geode Capital Management

Dimensional Fund Advisors

Federated Investors

Boxer Capital Management

View all funds holding Prothena

© 2025 stockzoa - Track 13F-HR Filings for Hedge Funds and Value Investors.

Disclaimers: stockzoa.com is not operated by a broker, a dealer, or a registered investment adviser. Under no circumstances does any information posted on stockzoa.com represent a recommendation to purchase or sell a stock. The information on this site is not intended to be, nor does it constitute, investment advice or recommendations. The information on this site is in no way guaranteed for completeness, accuracy or in any other way. In no event shall stockzoa.com be liable to any member, guest or third party for any damages of any kind arising out of the use of any content available on stockzoa.com, or relating to the use of, or inability to use, stockzoa.com or any content, including, without limitation, any investment losses, lost profits, lost opportunity, special, incidental, indirect, consequential or punitive damages. Past performance is a poor indicator of future performance.

Fund Directory: 1-9 A B C D E F G H I J K L M N O P Q R S T U V W X-Z