Managers / Q3 2025 · view latest →
Siren, L.L.C.
CIK 0002005245 · 10 QUAIL ROAD, GREENWICH, CT, 06831 · 212-371-1717
Reported Value
$2.6B
Q3 2025
Positions
117
Filings on Record
8
2019–present window
Filed
Nov 13, 2025
original filing
Summary
Siren, L.L.C. reported $2.6B in U.S.-listed holdings across 117 positions for Q3 2025.
Its largest position, SRRK, represents 13.5% of the portfolio.
Compared with Q2 2025, the fund opened 24 new positions and exited 19.
Reported Value by Quarter
13F Reported Value
Portfolio Composition
By security type
Composition data arrives with ticker enrichment.
Quarter-over-Quarter Changes full breakdown →
Holdings — Q3 2025
Filing History
| Quarter | Reported Value | Positions | Filed | Type | Links |
|---|---|---|---|---|---|
| Q1 2026 | $3.6B | 102 | May 14, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q4 2025 | $3.4B | 115 | Feb 13, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q3 2025 | $2.6B | 117 | Nov 13, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q2 2025 | $1.9B | 111 | Aug 13, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q1 2025 | $1.8B | 117 | May 23, 2025 | RESTATEMENT | changes · EDGAR ↗ |
| Q4 2024 | $2.3B | 119 | Feb 14, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q3 2024 | $2.0B | 112 | Nov 13, 2024 | 13F-HR | changes · EDGAR ↗ |
Other Included Managers
This filing reports holdings on behalf of 2 additional managers.
- Invus Financial Advisors, LLC028-19938
- Invus Group, LLC028-24462
13F filings are due up to 45 days after quarter end, so holdings shown here lag the fund’s current book. Source: original SEC filing on EDGAR ↗.