Siren, L.L.C.
Siren, L.L.C. reported 117 positions worth $4.94B as of June 30, 2026 (13F filed August 13, 2026). Largest holding: SRRK (10.7%).
| # | Symbol | Company | Type | Value ↓ | % Port. | Shares | 1Y | YTD |
|---|---|---|---|---|---|---|---|---|
| ▸ 1 | SRRK | SH | $526.6M | 10.66% | 9,575,013 | — | — | |
| ▸ 2 | KYMR | SH | $336.7M | 6.81% | 2,935,830 | — | — | |
| ▸ 3 | ERAS | SH | $208.8M | 4.23% | 11,397,781 | — | — | |
| ▸ 4 | MANE | SH | $203.5M | 4.12% | 1,655,374 | — | — | |
| ▸ 5 | TNGX | SH | $193.2M | 3.91% | 6,179,364 | — | — | |
| ▸ 6 | RVMD | SH | $168.6M | 3.41% | 900,000 | — | — | |
| ▸ 7 | BCAX | SH | $166.4M | 3.37% | 5,602,970 | — | — | |
| ▸ 8 | ARWR | SH | $139.8M | 2.83% | 1,715,476 | — | — | |
| ▸ 9 | ONC | SH | $132.5M | 2.68% | 465,000 | — | — | |
| ▸ 10 | EWTX | SH | $129.4M | 2.62% | 3,184,629 | — | — |
The free plan shows the top 10 positions. The remaining 107 positions, the full portfolio and quarter changes unlock with Pro.
Pro Feature
This section is exclusive to Fundocap Pro. Full holdings tables, consensus trades, ownership analysis, backtests and exports unlock with Pro.
Upgrade to ProRead the 2026-Q2 quarterly report · 13F Filing Calendar
Frequently Asked Questions
What stocks does Siren, L.L.C. hold as of Q2 2026?
Siren, L.L.C. reported 117 positions worth $4.94B in its Q2 2026 13F filing. Largest positions: SRRK (10.7%), KYMR (6.8%), ERAS (4.2%), MANE (4.1%) and TNGX (3.9%).
What did Siren, L.L.C. buy in Q2 2026?
No previous quarter is available yet; the comparison appears with the next filing.
What did Siren, L.L.C. sell in Q2 2026?
No previous quarter is available yet.
13F data shows quarter-end positions, is delayed by up to 45 days and covers only long positions in US-listed securities; short positions, most derivatives and non-US assets are not reported.