Managers / Q1 2026
Siren, L.L.C.
CIK 0002005245 · 10 QUAIL ROAD, GREENWICH, CT, 06831 · 212-371-1717
Reported Value
$3.6B
Q1 2026
Positions
102
Filings on Record
8
2019–present window
Filed
May 14, 2026
original filing
Summary
Siren, L.L.C. reported $3.6B in U.S.-listed holdings across 102 positions for Q1 2026.
Its largest position, SRRK, represents 14.8% of the portfolio.
Compared with Q4 2025, the fund opened 19 new positions and exited 32.
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 — Q1 2026
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 ↗.