Siren, L.L.C.

13F Filings History

Latest 13F report
Q2 2025 - Aug 13, 2025
Value $
$1.93B
Signature - Title
Raymond Debbane - Managing Member
Location
Greenwich, CT
Summary
This page shows a list of all the recent 13F filings made by Siren, L.L.C.. Form 13F is required to be filed within 45 days of the end of a calendar quarter. Siren, L.L.C. reported 110 stock holdings with total value $1.93B as of Q2 2025. Top holdings included SRRK, KYMR, ONC, IRON, and CRNX.
Holdings Value
Quarter Holdings Value $ Bought Sold Net Top Holdings Form Type Date Filed
Q2 2025 110 $1.93B +$208M -$221M -$12.9M SRRK, KYMR, ONC, IRON, CRNX 13F-HR 8/13/2025, 10:36 AM
Q1 2025 116 $1.77B +$315M -$319M -$4.31M SRRK, ONC, KYMR, BPMC, CRNX Restatement 5/22/2025, 06:45 PM
Q4 2024 117 $2.26B +$418M -$280M +$139M SRRK, ONC, KYMR, APLS, CRNX 13F-HR 2/14/2025, 11:06 AM
Q3 2024 109 $2B $0 $0 KYMR, BGNE, SRRK, BCAX, ARGX 13F-HR 11/13/2024, 02:52 PM