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
- Common Stock · 86.4% · $3.1B
- ADR · 9.5% · $341M
- Other · 4.2% · $150M
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 ↗.