§ 13F · FUND PROFILE
EcoR1 Capital, LLC.
Institutional filer · behavioral pattern: Other. Summary pending.
AUM · $2.1B (13F)Positions · 30Turnover · — · Q1Filed · May 15, 2026
CONCENTRATION
—
Top 10 holdings
NEW BUYS
0
+$158M deployed
EXITS
0
No exits
SECTOR SHIFT
—
No prior quarter data
3YR HIT RATE
—
Top-5 overlap
§ 01 · TOP HOLDINGS
The book · Q1 2026
FILED MAY 15, 2026
| # | Ticker | Name | Shares | $ value | % port | Δ Q1 |
|---|---|---|---|---|---|---|
| 1 | ZYME | ZYMEWORKS INC | 22.97M | $575M | 24.4% | ±0% |
| 2 | ANAB | ANAPTYSBIO INC | 7.88M | $437M | 18.5% | ±0% |
| 3 | JAZZ | JAZZ PHARMACEUTICALS PLC | 1.71M | $323M | 13.7% | ±0% |
| 4 | CNTA | CENTESSA PHARMACEUTICALS PLC | 6.00M | $238M | 10.1% | +106% |
| 5 | CRNX | CRINETICS PHARMACEUTICALS IN | 4.29M | $156M | 6.6% | ±0% |
| 6 | AKTS | AKTIS ONCOLOGY INC | 4.82M | $86M | 3.7% | NEW |
| 7 | ORIC | ORIC PHARMACEUTICALS INC | 6.73M | $85M | 3.6% | ±0% |
| 8 | CGON | CG ONCOLOGY INC | 1.10M | $75M | 3.2% | +3% |
| 9 | CRSP | CRISPR THERAPEUTICS AG | 1.39M | $66M | 2.8% | ±0% |
| 10 | ETON | ETON PHARMACEUTICALS INC | 2.17M | $54M | 2.3% | +7% |
§ 02 · SECTOR ALLOCATION
Where the money is
Sector data pending
§ 03 · THE ECOR1 SIGNAL
AC read
EcoR1 Capital, LLC is a Other fund managing $2.1 billion in assets. The fund runs a portfolio of 30 positions.
Read the full dossier →§ 04 · FILING HISTORY
Q-by-Q deltas
2 FILINGS
Q1 2026
Steady book
+0 buys · −0 exits · 0 changed
Q4 2025
Steady book
+0 buys · −0 exits · 0 changed
Q3 2025
Steady book
+0 buys · −0 exits · 0 changed